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Phone: +49 (0)8193-93700-0
info@gigahertz-optik.de

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Phone: +1-978-462-1818
info-us@gigahertz-optik.com

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Welcome to the 
NEWS Portal of
Gigahertz-Optik GmbH

On the following page we will provide you with the latest information on product innovations, software updates, event announcements and many interesting topics from Gigahertz-Optik GmbH. Here you have the possibility to get a picture of our developments at any time. If you have any questions, please contact our technical sales department. We will be glad to help you.

Always up-to-date bei product developments und updates, our latest press releases and current information on events in which we participate

Product news: SphereSpectro 150H - UV-VIS-IR spectrophotometer

The SphereSpectro 150H - UV-VIS-IR spectrophotometer

Shortens the working time in your measurement application and delivers high-precision, absolute measurement results.

Measures the spectral absorption coefficient (µa) and the spectral, effective scattering coefficients (µs - also called reduced scattering coefficient) of diffuse and clear samples, regardless of whether they are solid or liquid.

The table-top device has a large sample space with a clamp holder, which makes inserting the samples just as easy as evaluating them on the screen. An intuitive software package is provided to enable you to "plug & play" evaluation of your scattered or clear media in a matter of seconds.

Ideally suited for material analysis, biophotonics, content determination as well as quality assurance, food analysis, pharmacy or cosmetics.

 We recommend this video to give you a quick insight into the innovative technology for the simultaneous determination of the scattering and absorption of a volumetric sample.

SphereSpectro150H GigahertzOptik

For more product Information about the SphereSpectro 150H please follow this link.

Gigahertz Optik at German Pavilon at LASER CHINA 2021

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Gigahertz Optik GmbH will be represented at the "German Pavilion" from March 17th to 19th, 2021 of the LASER World of PHOTONICS CHINA 2021. With current solutions in light, laser and UV measurement technology, we are looking forward to getting in touch with you and discussing your problem.


UVC Radiometer
Learn more about our UVC radiometers for measuring irradiance (µW / cm²) and dose (mJ / cm²) of germicidal lamps, including Hg, excimer and xenon lamps as well as UV-C LEDs.


ISD-1.6-SP – Laser detector
Detector for the fast, time-resolved (ns) radiant power measurement of pulsed laser diodes and LEDs.


The SphereSpectro 150H

UV-VIS-IR spectrophotometer for the separate and simultaneous determination of the spectral absorption coefficient as well as the spectral effective scattering coefficient of solid and liquid samples.


For general informations about our light measurement product range follow this link to our brochure  „Measurement Solutions for general and specialized lighting“.

 

WE thank you for your interest and are happy to answer your questions at info@gigahertz-optik.de or
via phone on + 49 08193 93 700-0.

Disinfection against coronavirus

Gigahertz-Optik ensures UVC lamps provide effective and safe disinfection against coronavirus

UVC lamps installed in the upper part of rooms provide effective inactivation of airborne pathogens such as SARS-CoV-2.  They can make an important contribution towards ensuring normal life in shops, offices, schools and hospitals even in these times of coronavirus.

Watch the ZDF Video to see how Europe’s first supermarket irradiated their store with UV-C light to kill coronaviruses.

However, it is important to ensure installations are safe for all occupants whilst providing a sufficient, but contained, dose of UVC in the upper room area.

With its X1-1-UV-3725 UVC radiometer Gigahertz-Optik supplies the perfect hand-held measuring device to obtain high-precision measurements of low-pressure mercury lamp-based installations. It enables testing in accordance with international safety standards as well as ensuring an effective germicidal dose is achieved.

For UVC LED based systems the model X1-1-UV-3726 is recommended as it additionally incorporates calibration factors at LED centre wavelengths 260nm-290nm. For far-UV germicidal sources such as excimer lamps (222nm), model X1-1-UV-3727 should be selected.   It measures irradiance in the range from 200 to 300 nm and is calibrated for use with excimer lamps (222nm), UVC LEDs and low-pressure mercury lamps (254nm).

The detectors of the UV-37xx series were specially developed for radiometric measurements in the ultraviolet spectral range and have proven themselves in industrial and scientific use for many years. They are pre-aged with UV radiation for long-term stability, provide a strictly linear response, reject ambient light and incorporate a precision cosine response diffuser.

Each UVC radiometer is calibrated in our own DIN EN ISO / IEC 17025: 2018 accredited laboratory (DAkkS-certified).

The safe and effective use of germicidal UVC light sources can be guaranteed using the Gigahertz-Optik range of UVC radiometers.

 

You can find more information here:

UVC Radiometer

MSC15-Bili Blue light phototherapy irradiance meter for all lamp types

The MSC15-Bili is a compact spectral light meter for measuring irradiation intensity of blue light phototherapy systems irrespective of the lamp type or manufacturer. The meter conveniently measures the average and integrated irradiance in accordance with IEC 60601-2-50 and AAP Guidance. Each meter is supplied with a traceable calibration certificate from the ISO-17025 accredited Gigahertz-Optik laboratory.

 

The diverse range of available treatment lamps, which includes LEDs, various fluorescent tube types, tungsten halogen and metal halide lamps, produce widely differing spectral outputs. As there is no accepted action spectra for blue light phototherapy, manufacturers have tended to offer proprietary radiometers that are matched to their specific light source only. Significant errors can occur if used with other lamp types.

 

The MSC15-Bili spectral light meter provides a universal solution as it measures the actual spectral irradiance produced by the lamp and provides display modes in accordance with the latest standards and guidance. It directly displays total irradiance for bilirubin, Ebi (mW/cm2) in accordance with IEC 60601-2-50:2009+A1:2016 as well as average spectral irradiance (µW/cm2/nm) in accordance with the latest American Academy of Pediatrics, AAP, recommendations. Full spectral data is also available which enables the emulation of any proprietary wavelength band specified by a lamp manufacturer.

 

The meter provides individual display screens for AAP 2004 Guidance 430 nm – 490 nm and AAP 2011 Guidance 460 nm – 490 nm (μW/cm2/nm), and IEC 60601-2-50 Ebi, 400 nm – 550 nm (mW/cm2). Additionally, the meter measures spectral irradiance 360 nm – 830 nm providing lux, CCT and x,y chromaticity values. The AAP spectral irradiance range is better than: 0.01 – 250 µW/cm2/nm. The user can configure the meter to display only the required display screens. A color touch screen display provides intuitive handheld operation. The battery, designed for a full working day, can be charged with common USB chargers. The MSC15-Bili can also be operated via its USB interface with the included software.

 

https://www.gigahertz-optik.com/en-us/product/MSC15-Bili

UVC Radiometer for Germicidal UV Sources including 222nm Excimer Lamps

The new X1-1-UV-3727 radiometer is designed to accurately measure the far-UVC irradiance or dose produced by 222nm excimer lamps. This is in addition to the measurement of other germicidal UV source types including low pressure Hg lamps and UV LEDs. Each meter has a wide dynamic range and is supplied with a traceable calibration certificate from the ISO-17025 accredited Gigahertz-Optik laboratory.

 

Far-UVC radiation, such as the 222nm produced by Kr-Cl excimer lamps, has been the subject of many studies and is known to be effective against a wide range of pathogens. Significantly, it is also thought to offer less photobiological hazard because far-UVC light cannot penetrate human skin as deeply as the longer wavelength UV radiation produced by low pressure Hg lamps and UVC LEDs.

 

The X-1-1-UV-3727 radiometer measures UV-C irradiance over a very wide dynamic range from 0.002 µW / cm² to 1000 mW / cm² which permits the investigation of both germicidal efficacy as well as hazard. It is supplied with calibrations at 222 nm for excimer lamps, 254 nm for low pressure Hg lamps, and wavelength dependent calibration factors given in 5 nm increments 250 nm to 300 nm for UV LEDs. The detector’s flat spectral responsivity ensures lowest measurement uncertainty irrespective of the precise wavelength of UV LEDs which inevitably varies according to operating conditions and manufacturing tolerances.

 

The handheld meter provides a real time display of irradiance (mW / cm²) or dose (mJ / cm²) and includes a peak-hold function. The device may also be operated via its USB interface with optional S-X1 software. To correctly measure irradiance the detector’s entrance optic is a diffuser with a cosine field of view. The detector is pre-aged to significantly reduce solarization effects that results from long term exposure to UV radiation.

 

Gigahertz-Optik operates an extensive calibration facility that is DIN EN ISO / IEC 17025 accredited. In addition to the absolute radiometric calibration, every UV radiometer produced by Gigahertz-Optik is individually calibrated with regard to its relative spectral responsivity. In accordance with CIE 220:2016 this enables spectral mismatch error to be corrected for, thereby reducing the overall measurement uncertainty.

 

https://www.gigahertz-optik.com/en-us/product/X1-1-UV-3727

UVC Radiometer for Germicidal UV Sources including 222nm Excimer Lamps

The new X1-1-UV-3727 radiometer is designed to accurately measure the far-UVC irradiance or dose produced by 222nm excimer lamps. This is in addition to the measurement of other germicidal UV source types including low pressure Hg lamps and UV LEDs. Each meter has a wide dynamic range and is supplied with a traceable calibration certificate from the ISO-17025 accredited Gigahertz-Optik laboratory.

Far-UVC radiation, such as the 222nm produced by Kr-Cl excimer lamps, has been the subject of many studies and is known to be effective against a wide range of pathogens.  Significantly, it is also thought to offer less photobiological hazard because far-UVC light cannot penetrate human skin as deeply as the longer wavelength UV radiation produced by low pressure Hg lamps and UVC LEDs.

TheX1-1-UV-3727 radiometer measures UV-C irradiance over a very wide dynamic range from 0.002 µW / cm² to 1000 mW / cm² which permits the investigation of both germicidal efficacy as well as hazard.  It is supplied with calibrations at 222 nm for excimer lamps, 254 nm for low pressure Hg lamps, and wavelength dependent calibration factors given in 5 nm increments 250 nm to 300 nm for UV LEDs. The detector’s flat spectral responsivity ensures lowest measurement uncertainty irrespective of the precise wavelength of UV LEDs which inevitably varies according to operating conditions and manufacturing tolerances.The handheld meter provides a real time display of irradiance (mW / cm²) or dose (mJ / cm²) and includes a peak-hold function. The device may also be operated via its USB interface with optional S-X1 software. To correctly measure irradiance the detector’s entrance optic is a diffuser with a cosine field of view. The detector is pre-aged to significantly reduce solarization effects that results from long term exposure to UV radiation.

Gigahertz-Optik operates an extensive calibration facility that is DIN EN ISO / IEC 17025 accredited. In addition to the absolute radiometric calibration, every UV radiometer produced by Gigahertz-Optik is individually calibrated with regard to its relative spectral responsivity. In accordance with CIE 220:2016 this enables spectral mismatch error to be corrected for, thereby reducing the overall measurement uncertainty.

https://www.gigahertz-optik.com/en-us/product/X1-1-UV-3727

Lighting Research Center - Online UV Measurement Course

The COVID-19 pandemic has led to a growing interest in the use of UV (ultraviolet) systems for disinfection in a range of applications. However, it is important that anyone who is interested in applying UV in buildings understands how to properly specify and measure UV lighting products and systems.

The Lighting Research Center (LRC) at Rensselaer Polytechnic Institute has been conducting research in the area of UV disinfection systems for over 20 years, including the proper measurement, evaluation, and application of these systems. Based on this knowledge, the LRC has developed an online course on UV measurement and application to assist lighting specifiers, facility managers, end-users and others to ensure that the UV systems they select are safe, being applied properly in each application, and are effective at providing required disinfection properties.

Gigahertz-Optik will sponsor the online course and will provide UV radiometric instrumentation to demonstrate measurement techniques and how to properly evaluate UV disinfection products in terms of UV-C germicidal efficacy and health hazard assessment.

Clink the link below to find more information and to register for the course which will be held online on September 14 and 16, 2020.

LRC Online UV Course - Measurement and Application

Lean more about LRC research in the UV systems by watching this video:

LCR Online UV Course video

Contact us for more information:

info-us@gigahertz-optik.com

Innovative spectrometer system for determining the scattering and absorption coefficients of turbid

With the new and unique SphereSpectro 150H spectrometer system, Gigahertz-Optik offers a solution for simultaneously determining the spectral absorption and scattering coefficients for scattering samples. Conventional spectrophotometers (also called transmission spectrometers or absorption spectrometers) are used to determine the absorption coefficient of clear or colored media. In a similar way to these conventional systems, the SphereSpectro 150H is used to determine the spectral absorption coefficient of scattering media. To do this, the sample is illuminated and the transmitted as well as the reflected light is measured and evaluated in a differentiated manner using radiative transfer theory. For clear samples the absorption coefficient is determined based on Beer-Lambert's law. However, if the sample exhibits scattering (i.e turbid or translucent samples), the entire physical process must be taken into account, i.e. a combination of scattering and absorption properties.p>

With the innovative SphereSpectro 150H spectrometer system from Gigahertz-Optik the absolute absorption coefficient can now also be determined for scattering media independent of the scattering properties of the turbid medium. At the same time, the effective scattering coefficient of the sample is determined, which provides additional information about the microstructure of the sample. This is a unique feature, which is not otherwise available on the market. The determined absorption coefficient is identical with the absorption coefficient determined conventionally for clear media and can be used for content determinations, for example. The SphereSpectro 150H uses an integrating sphere to measure the total reflected and transmitted light of an illuminated sample. From these two quantities, the absorption coefficient and the effective scattering coefficient are calculated based on the radiative transfer equation.

The SphereSpectro 150H covers the wavelength range between 200 nm and 2150 nm. Modular versions are also available for sub-ranges within this entire spectral range. The unique measuring system is also characterized by simple operation, short measurement times and a large sample chamber with optimized sample holder whilst keeping overall size to a minimum.

SphereSpectro150H

New: Enhanced flicker frequency range, BTS256-EF now measures up to 40 kHz

The lighting industry requires very versatile and reliable measurement devices when spectral light and flicker meters are concerned. The field of measurement applications and quantities is very broad: Besides illuminance and spectrum, there are many additional, more specialized properties of light sources that need to be measured like their performance in context with human centric lighting (HCL), their flicker properties, their efficiency in plant growth and many more. In all of those applications, it is crucial that the meter needs to be reliable and precise.

The BTS256-EF by Gigahertz-Optik GmbH, a well-known measuring device manufacturer, has already been up to that challenge for many years. It offers a wide selection of measuring quantities relevant in general lighting and hence acts as universal measuring device in its field. Now, the device has been updated to record and analyze even higher flicker frequencies than before: It supports signal sampling with up to 40 kHz.

Furthermore, this enhancement does not only apply to brand-new devices: By applying the latest firmware and software updates, this new feature also becomes available for devices that have been out in the field for many years. Updates are offered on request.

BTS256-EF

UV-C Radiometer for disinfection effectiveness and safety of UV-C LEDs and germicidal lamps

The X1-1-UV-3726 radiometer enables the effectiveness of UV germicidal irradiation (UVGI) to be accurately determined for both low pressure mercury (254nm) germicidal lamps and UV-C LEDs. Additionally, the device has sufficient sensitivity to detect if undesired exposure poses a photobiological safety risk to users. UVGI is a sterilization method that uses UV-C light to break down microorganisms such as viruses and bacteria by altering their DNA and RNA, rendering them unable to replicate.

The germicidal effectiveness of UV-C radiation depends on its dose (µJ / cm2) and wavelength. The dose is determined by measuring the irradiance (µW / cm2) and duration of exposure. The effectiveness of germicidal activity is wavelength dependent with a maximum around 265 nm which makes the potential germicidal efficacy of available UV-C LEDs greater than 254 nm emission Hg lamps.

The X1-1-UV-3726 radiometer measures UV-C irradiance over a very wide dynamic range to beyond 100 mW / cm² with a resolution of 0.001 µW / cm². It is calibrated for its spectral responsivity from 250 nm to 300 nm. Wavelength dependent calibration factors given in 5 nm increments are incorporated for measuring UV LEDs with known nominal wavelength. Additionally, a 254 nm calibration is included for Hg lamps as well as a general purpose 260 nm to 290 nm calibration for non-specific UV-C LEDs.

The X1-1-UV-3726 offers sufficient sensitivity to check for safety compliance and the effectiveness of personal protection equipment (PPE) in accordance with the accepted occupational exposure limit to actinic UV (ICNIRP). This requires irradiance levels to be < 0.2 µW/cm2 at 254 nm and < 0.1 µW/cm2 at 270 nm over 8 hour’s exposure. The handheld meter provides a real time display of irradiance or dose and includes a peak-hold function. The device may also be operated via its USB interface. Each meter is supplied with a traceable calibration certificate from the Gigahertz-Optik laboratory.

X1-1-UV-3726

Gigahertz-Optik is now a part of the Berghof Group

The technology-focused and family-owned Berghof Group has plans for further growth, including key strategic acquisitions. It didn’t take the company long to add yet another addition to its group, and the integration process is in full swing.

Despite indications of an impending economic crisis, all signs still point to growth for Berghof in 2020. As of January 1st, 2020, the Berghof group of companies headquartered in Eningen, Germany, has acquired Gigahertz-Optik GmbH, which is located in the bavarian city Tuerkenfeld near to Munich. By this the Berghof Group grows from five to six subsidiaries and from eight to nine business units.

For over 30 years, Gigahertz-Optik has been successful in delivering metrological solutions for optical radiation for industrial applications, both nationally and internationally. In preparation for their impending retirement, the two founders and previous owners Wolfgang Daehn (second from right) and Dipl.-Ing. (FH) Anton Gugg-Helminger (second from left) have been searching for a strong new ‟home‟ for their company to make sure that their life’s work will be in good hands, and that it continues to prosper and grow.

Therefore we are more than happy that we have reached an agreement for the purchase of our company with our partner of choice‟, said Mr. Daehn and Mr. Gugg-Helminger with pride. In addition, the corporate cultures of both organizations blend perfectly together with their strong focus technology and their large groups of engineers. The founders will spearhead the company’s integration under the Berghof Group umbrella until their retirement. Frank Reißmann has been appointed as the new CEO, bringing more than 25 years of leadership experience from the fields of photonics, optics, measurement technology and technical ceramics.

The entire team, along with the company‘s headquarters in Tuerkenfeld will remain intact. With this strategic new addition to the group, Berghof is sending a clear message that the group will place much more focus on the field of photonics than ever before. For the Berghof Group, this field is interesting for three reasons: first, Berghof Fluoroplastics Technology GmbH is one of the leading manufacturers of high-performance optical materials based on Polytetrafluoroethylene (PTFE). Second, optical measurement devices play a key role in the laboratory industry, the playground of Berghof Products + Instruments GmbH. And third these systems are one of the key technologies in the field of autonomous driving, which in turn brings the Testing unit of Berghof Automation GmbH into play.

With the acquisition of Gigahertz-Optik the Berghof Group expands its product portfolio in the field of optical measurement to include light meters, spectroradiometers and other optical measurement systems as well as related recalibration services‟, Dr.-Ing. Bernd Arnold (far right) and Heinz-Uwe Vogel, CEO and CFO of the Berghof Group, are pleased. The integration of Gigahertz-Optik into the Berghof Group is already in full swing. Cross-functional teams are already working on their first joint projects.

The family-owned Berghof technology company, founded in 1966 and headquartered in Eningen, Germany, has been synonymous with intensive knowledge exchange across a variety of disciplines. This collaborative approach is expressed today in the idea of the ‟Innovation Hub‟, by which the staff live and breathe a workforce of nearly 400 professionals across nine business units. The Berghof Group serves numerous growing markets like photonics, water reuse and eMobility with plans for double-digit growth in 2020 to reach sales revenues of about 65 million Euros.

Integrated Solution for Human Centric Lighting (HCL) / Integrative Lighting Assessment

Gigahertz-Optik GmbH, Germany (EU), is the only manufacturer of precise lighting measuring equipment that provides an integrated hardware and software solution to streamline the assessment of Human Centric Lighting (HCL) / Integrative Lighting, from design and prototyping, to commissioning in real-life spaces (offices, schools, healthcare facilities, industry, hospitality etc.).

 

The solution can also assist with “Performance Verification (PV)” of the “WELL Building Standard” Light Concept, UL DG 24480 “Design Guideline for Promoting Circadian Entrainment with Light for Day-Active People” , and it is compliant with CIE S026/E:2018 “ClE System for Metrology of Optical Radiation for ipRGC-Influenced Responses to Light” reporting.

Furthermore, it can provide precise real-time assessment of the Eh/Evmel performance metric.


 

As a result of the collaboration of Gigahertz-Optik with Dr. Octavio L. Perez, Ph.D, WELL Accredited  Professional (WELL AP), independent expert consultant in HCL, and adjunct researcher at Mount Sinai Hospital in New York City, NY, Gigahertz-Optik provides an integrated solution for Human Centric Lighting (HCL) / Integrative Lightingassessment where horizontal and vertical measurements can be taken simultaneously, at the same time.

Up to now, assessing Human Centric Lighting (HCL) / Integrative Lighting has been a challenging process for researchers, lighting fixtures manufacturers, architects, engineers, facilities managers, lighting designers and end-users. The typicalworkflow consisted in measuring light and lighting conditions with spectrometers and proprietary software, saving the different (horizontal and vertical) spectral measurements (SPD) in excel-readable files (typically CSV, comma separated values), and then doing calculations, first in the Lucas et al. 2014 workbook, and lately in the CIE S026/E:2018 Toolbox. Reporting was next. Certainly, a cumbersome, time-consuming and error prone process. Now, with the single push of a button you can get all the measurements and reports for HCL / Integrative Lighting (WELL Building Standard, UL DG 24480, CIE S026/E:2018) in a timesaving and error-free way.

The “WELL Building Standard” Light Concept provides different lighting requirement specifications for the built environment, in the photopic (visual), and in the circadian (non-visual) domains. The lighting system and the environment have to be assessed for compliance with several lighting quality parameters such as light levels for visual acuity (illuminance), electric light quality (color rendering -CRI and IES-TM3018- and flicker/TLA) , and circadian lighting (equivalent melanopic lux -EML- and/or CIE melanopic equivalent daylight illuminance -MEDI D65-). The software can provide reporting and mission planning for assessment and Performance Verification (PV) for the “WELL Building Standard” Light Concept, and it is compliant with CIE S026/E:2018 “ClE System for Metrology of Optical Radiation for ipRGC-Influenced Responses to Light” reporting.

According to the “WELL Performance Verification Guidebook (Q1-2020)”, all these parameters must be calculated from illuminance and spectral measurements performed with calibrated meters (calibrated as per manufacturer specifications in an ISO/IEC 17025 Accredited Calibration Laboratory and/or with NIST/USA traceable calibration).

Gigahertz-Optik is a well stablished and recognized German manufacturer of precise light and lighting measurement devices. All the devices are calibrated upon delivery and can be regularly calibrated per ISO/IEC 17025 Accredited Calibration Laboratories and/or NIST traceable facilities (upon request). The recommended laboratory and field spectral light meters for HCL / Integrative Lighting are the following:

  • MSC15 precise entry-level handheld stand-alone spectrophotometer with display, battery and USB for photometric and spectral measurements and calculations.
  • CSS-45 sensor for photometric and spectral measurements with USB (available with optional display CSS-D).
  • BTS256-EF advanced handheld stand-alone spectrophotometer with display, battery and USB, for photometric, spectral, and flicker/TLA (Temporal Light Artifacts) measurement and calculations.

The operation of these three families of devices can also be automated through the use of different software solutions. Gigahertz-Optik also provides single device software and SDK DLLs (software development kits) to perform and automate lighting measurements (available in the Microsoft Windows operating system platform).

Gigahertz Optik BTS256 EF3Gigahertz Optik CSS 45 5Gigahertz Optik MSC18

 

Integrated Solution for Human Centric Lighting (HCL) / Integrative Lighting Assessment

Gigahertz-Optik GmbH, Germany (EU), is the only manufacturer of precise lighting measuring equipment that provides an integrated hardware and software solution to streamline the assessment of Human Centric Lighting (HCL) / Integrative Lighting, from design and prototyping, to commissioning in real-life spaces (offices, schools, healthcare facilities, industry, hospitality etc.).

 

The solution can also assist with “Performance Verification (PV)” of the “WELL Building Standard” Light Concept, UL DG 24480 “Design Guideline for Promoting Circadian Entrainment with Light for Day-Active People” , and it is compliant with CIE S026/E:2018 “ClE System for Metrology of Optical Radiation for ipRGC-Influenced Responses to Light” reporting.

Furthermore, it can provide precise real-time assessment of the Eh/Evmel performance metric.


As a result of the collaboration of Gigahertz-Optik with Dr. Octavio L. Perez, Ph.D, WELL Accredited  Professional (WELL AP), independent expert consultant in HCL, and adjunct researcher at Mount Sinai Hospital in New York City, NY, Gigahertz-Optik provides an integrated solution for Human Centric Lighting (HCL) / Integrative Lightingassessment where horizontal and vertical measurements can be taken simultaneously, at the same time.

Up to now, assessing Human Centric Lighting (HCL) / Integrative Lighting has been a challenging process for researchers, lighting fixtures manufacturers, architects, engineers, facilities managers, lighting designers and end-users. The typicalworkflow consisted in measuring light and lighting conditions with spectrometers and proprietary software, saving the different (horizontal and vertical) spectral measurements (SPD) in excel-readable files (typically CSV, comma separated values), and then doing calculations, first in the Lucas et al. 2014 workbook, and lately in the CIE S026/E:2018 Toolbox. Reporting was next. Certainly, a cumbersome, time-consuming and error prone process. Now, with the single push of a button you can get all the measurements and reports for HCL / Integrative Lighting (WELL Building Standard, UL DG 24480, CIE S026/E:2018) in a timesaving and error-free way.

The “WELL Building Standard” Light Concept provides different lighting requirement specifications for the built environment, in the photopic (visual), and in the circadian (non-visual) domains. The lighting system and the environment have to be assessed for compliance with several lighting quality parameters such as light levels for visual acuity (illuminance), electric light quality (color rendering -CRI and IES-TM3018- and flicker/TLA) , and circadian lighting (equivalent melanopic lux -EML- and/or CIE melanopic equivalent daylight illuminance -MEDI D65-). The software can provide reporting and mission planning for assessment and Performance Verification (PV) for the “WELL Building Standard” Light Concept, and it is compliant with CIE S026/E:2018 “ClE System for Metrology of Optical Radiation for ipRGC-Influenced Responses to Light” reporting.

According to the “WELL Performance Verification Guidebook (Q1-2020)”, all these parameters must be calculated from illuminance and spectral measurements performed with calibrated meters (calibrated as per manufacturer specifications in an ISO/IEC 17025 Accredited Calibration Laboratory and/or with NIST/USA traceable calibration).

Gigahertz-Optik is a well stablished and recognized German manufacturer of precise light and lighting measurement devices. All the devices are calibrated upon delivery and can be regularly calibrated per ISO/IEC 17025 Accredited Calibration Laboratories and/or NIST traceable facilities (upon request). The recommended laboratory and field spectral light meters for HCL / Integrative Lighting are the following:

  • MSC15 precise entry-level handheld stand-alone spectrophotometer with display, battery and USB for photometric and spectral measurements and calculations.
  • CSS-45 sensor for photometric and spectral measurements with USB (available with optional display CSS-D).
  • BTS256-EF advanced handheld stand-alone spectrophotometer with display, battery and USB, for photometric, spectral, and flicker/TLA (Temporal Light Artifacts) measurement and calculations.

The operation of these three families of devices can also be automated through the use of different software solutions. Gigahertz-Optik also provides single device software and SDK DLLs (software development kits) to perform and automate lighting measurements (available in the Microsoft Windows operating system platform).




Measurement solutions for ecodesign regulations and HCL applications on

Gigahertz-Optik will be presenting some of its innovative light measurement solutions at this year’s Light + Building including the MSC15 and https://www.gigahertz-optik.com/en-us/product/bts256-ef spectral light and flicker meters as well as the versatile CSS-45 spectral sensor configured for Human Centric Lighting performance verification..

The European ecodesign Regulation (EU) 2019/2020 imposes strict requirements for flicker and stroboscopic effect. The metrics specified are PstLM short-term flicker severity and SVM stroboscopic visibility measure. Both these metrics are conveniently measured by the BTS256-EF meter and its software. With the addition of the LPS-CH-500 signal generator and software, the BTS256-EF performs the EMC electromagnetic immunity tests required by IEC TR 61547-1:2017.

The melanopic stimulus metric together with the spectral composition of lighting are fundamental to understanding in the field of Human Centric Lighting. These measures are provided by all of the spectral light meters from Gigahertz-Optik including the popular MSC15. Additionally, the BTS256-EF reports all the metrics to characterize the non-visual stimulus of light as defined by CIE publication S026:2018. A system incorporating two CSS-45 spectral sensors provides direct assessment against emerging standards such as the “WELL Building Standard” with regard to non-visual requirements of lighting.

Visit us in Hall 8.0, Booth H50 on the  Berghof Fluoroplastic Technology GmbH stand. Gigahertz-Optik is part of the Berghof Group.

PLL-1701 - High-speed transimpedance log/lin amplifier with internal integrating sphere

With its new high-speed transimpedance amplifier PLL-1701 Gigahertz-Optik offers a versatile solution for use with either external photodiodes or its internal integrating sphere and detector combination. This compact device incorporates both logarithmic and linear amplifiers and can provide an analogue voltage output or a digitized output of the input signal current. Application software is included and an SDK is available for full integration and automation.

The PLL-1701 offers nine linear amplifier stages each with an identical rise time of 16µs. The maximum input current is 1mA and output signals can be up to +/- 5V. Additionally, the PLL-1701 offers a single-range logarithmic amplifier which can be used for applications with very fast dynamic fluctuations such as fast positioning tasks or pulsed light sources with very wide dynamic ranges. The voltage output of the Analogue/Analogue mode (AA) is suitable for use with oscilloscopes and other data acquisition systems (e.g. datalogger). The PLL-1701 also offers an Analogue to Digital Conversion mode (ADC) in which the input current signals are digitized by the internal processor and output via RS422 and USB 2.0 interfaces.

Data analysis is done with either the included application software or the available Software Development Kit (SDK). Evaluation routines for light flicker assessments (including PstLM, SVM, flicker frequency, flicker index) are already implemented in the software and also in the SDK and can thus be used directly. Therefore, the PLL-1701 complies with international standards for temporal light modulation (TLM) applications including the EU Ecodesign Directive, CIE TN006:2016, and NEMA 77-2017. Furthermore, the PLL-1701 has an internal integrating sphere with an extended range InGaAs photodiode. FC-terminated fibers can be directly connected allowing their power (A/W/nm) to be measured in the spectral range from 400-1550nm. The InGaAs photodiode signal is also output in both AA and ADC modes. https://www.gigahertz-optik.com/en-us/product/PLL-1701 .

 

 PLL 1705PLL 1701 back3

Measurement solutions in HCL applications and in accordance with the Ecodesign Directive at Light an

Gigahertz-Optik will be presenting some of its innovative light measurement solutions at this year’s Light + Building including the MSC15 and BTS256-EF spectral light and flicker meters as well as the versatile CSS-45 spectral sensor configured for Human Centric Lighting performance verification..

The European ecodesign Regulation (EU) 2019/2020 imposes strict requirements for flicker and stroboscopic effect. The metrics specified are PstLM short-term flicker severity and SVM stroboscopic visibility measure. Both these metrics are conveniently measured by the BTS256-EF meter and its software. With the addition of the LPS-CH-500 signal generator and software, the BTS256-EF performs the EMC electromagnetic immunity tests required by IEC TR 61547-1:2017.

The melanopic stimulus metric together with the spectral composition of lighting are fundamental to understanding in the field of Human Centric Lighting. These measures are provided by all of the spectral light meters from Gigahertz-Optik including the popular MSC15. Additionally, the BTS256-EF reports all the metrics to characterize the non-visual stimulus of light as defined by CIE publication S026:2018. A system incorporating two CSS-45 spectral sensors provides direct assessment against emerging standards such as the “WELL Building Standard” with regard to non-visual requirements of lighting.

Visit us in Hall 8.0, Booth H50 on the  Berghof Fluoroplastic Technology GmbH stand. Gigahertz-Optik is part of the Berghof Group.

BTS256-EF measures new flicker metrics for compliance with Ecodesign Directive

The European Commission´s proposed regulation of lighting under the Ecodesign Directive will establish mandatory product performance and quality requirements on all lighting products. This new EU directive will include strict requirements for flicker and stroboscopic effect, collectively referred to as temporal light artefacts (TLA). Simple measures such as flicker index and modulation depth will not be adequate as they do not distinguish the possible TLA effects and do not account for the effect of frequency-dependent sensitivity or the wave shape of light output. The BTS256-EF spectral light and flicker meter measures the specific metrics required by the regulation, PstLM and SVM.

The metric used for flicker in the Ecodesign regulation is the parameter ‘PstLM’, short-term flicker severity, where a value of PstLM=1 means that the average observer has a 50 % probability of detecting flicker. The metric used for stroboscopic effect in this regulation is ‘SVM’, stroboscopic visibility measure, where SVM = 1 represents the visibility threshold for an average observer.

The limits in this new EU directive are currently discussed to be PstLM < 1.0 and SVM < 0.4 although there is lobbying from the lighting industry to relax the SVM limit to <1.6. Regardless, meeting these demanding limits, particularly for SVM, will require considerable effort by manufacturers prior to the September 2021 enforcement date.

Besides full TLA measures, the BTS256-EF in conjunction with its provided software provides comprehensive photometric and colorimetric data required for general lighting applications. Additional functions are also provided for specialist tasks such as horticultural and human centric lighting.

 

BTS256 EF Fachartikel

New stray light correction method enables UV hazard measurements with array spectroradiometer

New stray light correction method enables UV hazard measurements with array spectroradiometer

 

A new stray light correction method implemented in the BTS2048 UV array spectroradiometer now enables applications previously only possible with double monochromator systems. This novel method was presented at the CIE’s 29th quadrennial session.

It combines Out-of-Range and In-Band stray light correction techniques, thereby greatly increasing the dynamic range of accurate UV measurements. This performance is particularly beneficial for the assessment of UV hazards in accordance with the measurements required by IEC / DIN EN 62471, EU Directive 2006/25/EC and ICNIRP guidelines.

The compact BTS2048-UV-S is convenient for in-situ measurements as well as laboratory based setups. This hybrid stray light correction method has been incorporated into the latest S-BTS2048 software.

 

 

Measurement of a 450 W xenon lamp (at 180 mm) with a double monochromator reference and BTS2048-UV-S with and without correction.

New photometric detector for very low illuminance measurements

New photometric detector for very low illuminance measurements

P9710+Messkopfnlx

To meet the demands of the increasing number of very low light level applications, Gigahertz-Optik has introduced the VL-3707 precision photometric detector capable of accurate measurements down to less than 100 μlux.

For example, the VL-3707 is suitable for testing and characterising night vision equipment used in surveillance, security and automotive applications. The measurement of moonlight and starlight (mlux to μlux) enables research on light pollution of the night sky. Emergency lighting standards (e.g. DIN EN 1838 and ISO 30061) require measurement resolution in the mlux range.

The VL-3707 incorporates a latest technology photodiode, high transmission photometric filtering, and a cosine diffuser to create a highly sensitive illuminance detector. Used in conjunction with the Gigahertz-Optik P-9710 Optometer, the VL-3707 provides a sufficiently high signal-to-noise ratio for reliable measurements even in the 100 μlux range.

 More information to VL-3707

Total Ozone Column (TOC) system at PMOD/WRC with array spectroradiometer

Total Ozone Column (TOC) system at PMOD/WRC with array spectroradiometer

The Physikalisch-Meteorologisches Observatorium Davos and World Radiation Center (PMOD/WRC) has developed a cost effective system, KOHERENT, based on a Gigahertz-Optik BTS2048-UV-S-F array spectroradiometer to retrieve TOC from a full spectrum in the UV band 300 nm – 350 nm thereby reducing the uncertainty of the ozone retrieval. Furthermore a traceability of TOC measurements was ensured.

See p33 of annual report:

Gigahertz-Optik Product Update - MSC15 now with built-in memory and advanced Settings

Gigahertz-Optik Product Update - MSC15 now with built-in memory and advanced Settings

As part of a product update, the range of functions of the compact MSC15 spectral light meter (https://www.gigahertz-optik.com/en-us/product/msc15) has been extended. The device is particularly suited to the measurement of LED based lighting in terms of illuminance, spectrum, color, CRI, PAR and human centric lighting metrics.

With this update the device gets internal memory for the local storage of up to 10 measurements which can be either managed directly by the MSC15 or by the supplied software.

In addition, a menu for individually switching on and off the possible display screens has been added. This user customization no longer requires connection to a PC thereby simplifying the configuration of the device for individual measurement tasks.

The MSC15 offers simple and intuitive operation, fast display of measurement results and traceable calibration. It can be used to measure any light source, displaying spectral irradiance from 360 nm - 830 nm as well as photometric and colorimetric data including photopic, scotopic and melanopic illuminance, color rendering indices, color temperature and CIE chromaticity. For horticultural applications, the MSC15 also directly displays PAR PPFD in μmol/m2/s.

https://www.gigahertz-optik.com/en-us/product/msc15

Gigahertz-Optik presents the latest product innovations for laser radiation measurement at LASER - W

The LASER World of PHOTONICS (June 24 to 27, Munich Trade Fair Center) offers the perfect opportunity to make important contacts within the photonics industry and to find out about the wide range of technologies and systems relating to photonics. This meeting of research and industry promotes the benefits and further development of the photonics industry. Gigahertz-Optik will present new products in the field of laser measuring technology at the fair. The locally based team is looking forward to a lively exchange and interesting discussions about light measurement technology with you.

As a supplier of measuring systems as well as testing and calibration services, Gigahertz-Optik is represented in numerous application fields of light measurement technology. Gigahertz-Optik offers a variety of solutions, especially for the complete characterization of laser radiation (power, pulse shape or pulse energy). Thus, for example, measurement systems can be put together which consist of either a standard or custom integrating sphere and a broadband detector or spectroradiometer (UV, VIS, NIR) to suit the application. For absolute and precise measurements, the systems are calibrated in the laboratory of Gigahertz-Optik which provides traceability to national metrology institutes. New product innovations in the area of compact and miniaturized integrating spheres as well as new developments of high-resolution detector systems will be presented at the fair.

Another focus is the measurement of optical properties of materials for research and industrial applications. Optical quantities such as absorption, transmission and reflection are measured with specially adapted integrating sphere systems. A typical setup includes a light source, a custom integrating sphere, and a detector. It's best to discuss your own particular requirements with your local technical representative. Gigahertz optics will be exhibiting in hall A2 at booth number 500. 

DOE Releases Study on Handheld Flicker Meters

DOE Releases Study on Handheld Flicker Meters

Gigahertz-Optik's BTS256-EF Light-Color-Spectral-Flicker Meter Included

The U.S. Department of Energy (DOE) has released the findings of a  new study on handheld flicker meters. Flicker - or, more precisely, temporal light modulation - is a repetitive variation in light output over a large frequency range, often exacerbated by relative eye or object movement. Flicker can have adverse effects on health and visual performance. 

Handheld meters from several different manufacturers were tested for performance as it relates to Percent Flicker and Flicker Index, as well as the performance at maximum and dimmed light output levels across all light sources tested. See the full report for exact product model numbers and description of laboratory testing, as well as explanations on the limitations of some meters.

The BTS256-EF which was included in the study provides the flicker parameters shown in the table either displayed on the meter itself or through the supplied S-BTS256 Software:

 

Ev (t)

illuminance over time graphic

 

Ev,min

minimal illuminance

lx

Ev,max

maximal illuminance

lx

 

Flicker Percent

%

 

Flicker Index

a.u.

f_dom

dominant flicker frequency

Hz

FFT

FFT flicker frequencies

Hz - %

PST

 Short-term flicker per CIE TN 006:2016 with S-BTS256

 -

SVM

Stroboscopic Visibility Measure per CIE TN   006:2016 with S-BTS256

 -

Assist Mp

Flicker perception with S-BTS256

-

 

The BTS256-EF not only measures flicker. It measures illuminance, color quantities, spectral irradiance and PAR  - Over 50 different measurands in all!

# 09-29019 Update - BTS256-EF now with Television Lighting Consistency Index (TLCI)

BTS256-EF now with Television Lighting Consistency Index (TLCI)

As LED lighting technology in the field of recording technology (e.g., studio or stadium lighting) has grown, it has been found that the previously used method of calculating the color rendering index CRI offers only limited opportunities for light assessment. Thus, the effort in post-production increases to produce realistic color impressions in the image material.

Therefore, the European Broadcasting Union (EBU) developed the Television Lighting Consistency Index (TLCI) and recommended it as EBU R 137. The TLCI is also included in the CIE Report 083: 2019 (Guide for the Lighting of Sports Events for Color Television and Film Systems, 3rd Edition), which provides recommendations for measuring the lighting conditions (color and flicker) at sporting events. For example, in the German Basketball League (BBL) there are requirements for the TLCI of the stadium lighting.

The TLCI specializes in 18 color locations that are relevant to recording and playback devices. Thus, it allows a much more accurate assessment of the quality of light and thus also improves the final quality of the recorded material.

Gigahertz-Optik has now incorporated the TLCI measurement as a method of color rendering determination into its S-BTS256 software. Thus, the 18 color locations as well as the overall rating can be read directly in the software during a measurement with the BTS256-EF and the light quality can be assessed. In combination with the integrated flicker measurement, the light for camera recordings can be assessed precisely, directly and quickly.

Here you will find all important data for the BTS256-EF.

BTS256 EF2     SoftwareScreenshot2

The new BTS2048-VL is a spectral colorimeter designed for precise LED flash binning and is ideal for

LED binning, in terms of the photometric and colorimetric specifications, requires spectral colorimeters that can ensure precise measurement values within very short measurement times synchronized with the process and that support fast data read out. The new BTS2048-VL from Gigahertz-Optik meets all the requirements for precise LED flash binning.

As stipulated by the EU Guideline 2007/23EG, a CE marking and approval by the so-called Notified Bodies are compulsory for pyrotechnic flares. Outside the EU, approvals by respective authorities e.g. the United States Coast Guard are obligatory. Logging of the Bengali flame in terms of its intensity and color is part of the test procedure. The BTS2048-VL spectral colorimeter is not only well suited for this application through its high measurement speed, but also through its compact housing with a tripod socket and its measurement optics that does not have susceptible light guides.

For more information on this device, go to BTS2048-VL.

Stray light correction of an array spectroradiometer in UV spectral range

An informative presentation explaining stray light as a significant error source in UV array spectroradiometers and minimization correction methods was presented by Mike Clark of Gigahertz-Optik GmbH at the recent UV LED Technologies & Applications Conference (ICULTA) in Berlin, Germany.

Topics included definitions/illustrations of an array type and double monochromator spectroradiometer, stray light, its causes and significance for UV measurement, suppression techniques through optical design, mathematical correction based on signal distribution function (SDF) characterization matrix using a tunable laser, and long pass plus bandpass filtering with associated limitations. The implementation of stray light suppression techniques into the spectroradiometer, subsequent characterization, actual on-site testing and consequences for UV LED measurement were also main topics.

Download the full presentation.

 

Stray light correction of an array spectroradiometer in UV spectral range

An informative presentation explaining stray light as a significant error source in UV array spectroradiometers and minimization correction methods was presented by Mike Clark of Gigahertz-Optik GmbH at the recent UV LED Technologies & Applications Conference (ICULTA) in Berlin, Germany.

Topics included definitions/illustrations of an array type and double monochromator spectroradiometer, stray light, its causes and significance for UV measurement, suppression techniques through optical design, mathematical correction based on signal distribution function (SDF) characterization matrix using a tunable laser, and long pass plus bandpass filtering with associated limitations. The implementation of stray light suppression techniques into the spectroradiometer, subsequent characterization, actual on-site testing and consequences for UV LED measurement were also main topics. 

Download the full presentation.

 

Nominated for the Innovation Award Bavaria 2018: Spectroradiometer BTS2048-UV-S with BiTec sensor fo

The limiting factor for the use of array-based spectroradiometers in the UV spectral region has been their inadequate stray light suppression.  Therefore, many UV applications could previously only be implemented with double monochromators. Such systems are inconveniently large and slow due to their mechanical scanning. Typically, they require complex installation and operation. 

The innovative BTS2048-UV-S instrument series is able to demonstrate the necessary quality for UV spectroradiometry thanks to its filter-based scattered light suppression of several orders of magnitude and its DAkkS traceable calibration. 

Additionally, it offers much shorter measurement times (a few seconds compared to many minutes), lower energy consumption, a considerably smaller design and a weather-proof enclosure for field applications. 

The system is well suited for solar UV and ozone measurements, for instance. Other typical applications include radiation risk assessment in occupational safety and the measurement of UV LEDs.

 

 

German language:
Download complete application for the Innovation Award Bavaria 2018: Spectroradiometer BTS2048-UV-S with BiTec sensor for fast, high-quality UV measurements

English language:
Download translation of the innovation: Spectroradiometer BTS2048-UV-S with BiTec sensor for fast, high-quality UV measurements

 

BTS2048-UV-S Specifications

 

Nominated for the Innovation Award Bavaria 2018: Spectroradiometer BTS2048-UV-S with BiTec sensor fo

Published on 19 July 2018, Author: Andreas Gross

Many applications in the UV range could until now only be realised with slow, complex, expensive, and above all large double monochromators. The systems required complex installation and logistics. Much more compact and stable structures can be realised with array spectroradiometers. Until now, the limiting factor has always been inadequate scattered light suppression in the UV range.

With the innovative BTS2048-UV-S device series from Gigahertz-Optik GmbH, a production-ready technology has been developed to overcome this limitation. Thanks to its innovative filter-based scattered light suppression and its DAkkS-traceable calibration (DIN EN ISO/IEC 17025), the BTS2048-UV-S showed very good absolute conformity over several orders of magnitude compared with an internationally accepted reference instrument (double monochromator) in an intercomparison.

The considerably shorter measurement time (a few seconds compared to many minutes) and the small size (reduction in volume by 98 %) open up new areas of application and investigation.
In addition, the new technology can be used anywhere, operating in a compact, weatherproof box with low energy consumption, meaning that the system allows for much easier solar UV and ozone measurement without major infrastructure and logistical requirements, even in exposed locations such as the alpine area (mount Zugspitze).

Other applications include radiation risk assessment in occupational safety and the measurement of UV LEDs, to name but a few.

180320 Press Release Gigahertz Optik BTS256 EF Redesign DE

 

New: Redesign of BTS256-EF light, PAR and flicker meter

The lighting industry requires high accuracy spectral light meters that can handle complex measurements. These include measurement of pulse width modulated light sources and the ability to measure both indoors and outdoors lighting, determination of thermal transient behavior of lamps, their flicker properties and so on. The primary criterion that such meters must always meet is the quality of their photometric features. 

With the BTS256-EF, Gigahertz-Optik GmbH, a renowned measuring device manufacturer, offers a universal measuring device for the determination of all relevant light parameters in general lighting. The new device has been updated which includes a redesign of some of its features. Changes include the enhancement of the wavelength range from 360 nm to 830 nm and the implementation of all functions of the BTS256-E, BTS256-EF and BTS256-PAR meter. 

Due to its redesign, the BTS256-EF is able to fulfill an even broader range of requirements. Its measurement features include photometric and colorimetric parameters, Photosynthetically Active Radiation (PAR) of plant grow lights, Human Centric Lighting (1), Stroboscopic Visibility Measure SVM (2), Short-Term Flicker Pst (2), and ASSIST Flicker Perception Metric Mp

The BTS256-EF is also available with an optional Wi-Fi function. 

(1) CIE TN 003:2015 

(2) CIE TN 006:2016

New: CSS-45 – Remote spectral detector

The CSS-45 detector incorporates a powerful microprocessor which performs not only data acquisition but also all necessary lighting calculations. Both USB 2.0 and RS 485 interfaces are standard enabling the flexible configuration of single and multi-detector based systems. An optional software development kit supports integration into third party application software. 

With its wide spectral range from 360 nm to 830 nm the CSS-45 is ideal, for example, as a high accuracy photometric and colorimetric detector (according to CIE S023). The precision diffuser provides excellent cosine correction (f≤ 1.5 %). The optical bandwidth correction feature (CIE 214) further improves the quality of the spectral measurement data. Manual and auto gain settings enable a wide measurement from 1 lx to 350,000 lx for illuminance and color measurements. 

The robust housing and its connectors are splash proof, and therefore suitable for use in industrial applications. A variant with protective glass dome in front of the diffuser is available. A special feature of the detector is its remote-controlled shutter, which allows a dark level measurement to be made at any time.

CSS-45 – Remote spectral detector for use in radiometric and photometric measurement setups.

New: Flicker test system for general lighting – lamps and luminaires

Manufacturers of lamps and luminaires for general lighting purposes must consider light flicker when qualifying EMC immunity requirements. In addition to the influence of mains voltage fluctuations, flicker effects caused by the lamp and the luminaire itself must be taken into account. 

With the BTS256-EF, Gigahertz-Optik GmbH, a renowned measuring device manufacturer, offers a universal measuring device for the determination of all relevant light parameters in general lighting. Combined with a LPS-CH-500 programmable AC source, the BTS256-EF becomes a comprehensive flicker test system for lamps and luminaires including voltage fluctuation immunity tests in accordance with IEC TR 61547-1:2017. 

The BTS256-EF supports all current flicker measurements: Percent Flicker, Flicker Index and FFT Frequency analysis, Short term flicker severity, Pst (*), Stroboscopic Visibility Measure, SVM (*), and ASSIST Flicker perception metric, Mp.

(*) Ref: CIE TN-006. 

Additionally, the BTS256-EF is a high-quality device for all photometric and colorimetric measurements of general lighting products and conditions - made possible by its special Bi-Tec sensor technology. 

Please click here to find more detailed technical specifications. 

 

Gigahertz Optik BTS256 EF

BTS256-EF – handheld light & flicker meter including new Pst, SVM and Mp metrics 

TFCT25 - Measurement of Light Guide Transmission Properties

We have developed the TFCT25 transmission measurement setup with one main application in mind:
the measurement of a light guide’s transmission properties. A number of elements are required in order to fulfill this task:

  • A high resolution spectral radiometer (BTS2048-VL-TEC) is able to measure the spectral properties, luminous flux and color of a light source.
  • Since light sources and light guide come is many different shapes an integrating sphere is required which collects the emitted light.
    Exchangeable apertures allow the creation of tailored fittings for each light source and light guide shape.
  • A power supply is included. Its triggering function allows the emission of short light
    pulses and their synchronized measurement via the spectralradiometer.

Sample holders with magnetic bases allow the flexible positioning of light guides with complex shapes while still allowing their stable fixture.
A magnetic steel table top is recommended for their use.

For detailed information you'll find the Video here: TFCT25 or via Youtube

 

TFCT25 - TFCT25 - Measurement of Light Guide Transmission Properties

We have developed the TFCT25 transmission measurement setup with one main application in mind:
the measurement of a light guide’s transmission properties. A number of elements are required in order to fulfill this task:

  • A high resolution spectral radiometer (BTS2048-VL-TEC) is able to measure the spectral properties, luminous flux and color of a light source.
  • Since light sources and light guide come is many different shapes an integrating sphere is required which collects the emitted light.
    Exchangeable apertures allow the creation of tailored fittings for each light source and light guide shape.
  • A power supply is included. Its triggering function allows the emission of short light
    pulses and their synchronized measurement via the spectralradiometer.

Sample holders with magnetic bases allow the flexible positioning of light guides with complex shapes while still allowing their stable fixture.
A magnetic steel table top is recommended for their use.

For detailed information you'll find the Video here: TFCT25 or via Youtube

Gigahertz-Optik Product Update – MSC15 now with Bilirubin measurement function

The MSC15 spectral light meter now includes display modes for the accurate measurement of neonatal phototherapy lamps in accordance with the latest standards and guidance, irrespective of the lamp type or manufacturer. It directly displays total irradiance for bilirubin, Ebi (mW/cm2) in accordance with IEC 60601-2-50:2009+A1:2016 as well as average spectral irradiance (µW/cm2/nm) in accordance with the latest American Academy of Pediatrics recommendations.

Neonatal phototherapy is widely used for the treatment for neonatal hyperbilirubinaemia, a condition in which there is too much bilirubin in the blood. This causes a yellowing of the infant’s skin, known as jaundice. Effective phototherapy requires sufficiently high irradiance with appropriate wavelengths, generally accepted as ‘blue light’.

Optimising treatment dosimetry, agreement on best practises and comparing research have all been hindered by the large variability of measurement data produced by the many proprietary broadband radiometers employed, each with its specific spectral response and typically tailored to specific lamp or LED types. The MSC15 spectral light meter conveniently and effectively eliminates these issues.

Additionally, the MSC15 can be used to measure any light source, displaying spectral irradiance from 360-830nm as well as photometric and colorimetric data including photopic, scotopic and melanopic illuminance, color rendering indices, color temperature and CIE chromaticity. MSC17.227bearb Bilirubin

MSC15 - Mit Bilirubin Messfunktion

After eighteen years in the works CIE Technical Committee TC 2-47 has completed and published CIE 22

After eighteen years in the works CIE Technical Committee TC 2-47 has completed and published CIE 220:2016. [1] This technical report describes quality indices for UV radiometers, which enable manufacturers and users to characterize instruments on a common basis. To harmonize CIE documents, the quality indices described in this document relate to the quality indices described in Joint ISO/CIE International Standard ISO/CIE 19476:2014(E) (formerly CIE S 023/E:2013).

The work began in the First Workshop of the "Thematic Network for Ultraviolet Measurements" in Espoo, March 2 and 3, 1998. The Network was funded by the Standards, Measurements and Testing programme of the Commission of the European Communities, as project number SMT4-PL96-9329.    

Within the Working Group 1 "Guidance for UV power meter classification for particular applications" with chair Anton Gugg-Helminger the document "Characterizing the Performance of Integral Measuring UV-Meters" was prepared. It is published in the UV news Issue 6/November2000. [2]

This publication was then adopted by CIE technical committee TC2-47 finishing the report in 2016.

Since UV filter radiometers very often measure light sources which are spectrally different than the light sources with which they were calibrated. As a result an uncertainty occurs called spectral mismatch error, defined as the ratio of the effective responsivity of the radiometer with respect to the radiant quantity of the test source to the effective responsivity with respect to the reference source.

UV radiometers in general are designed for various actinic spectra and different spectral ranges. So instead of only one defined reference light source spectra, CIE Illuminant A, used in photometry, three reference light source spectra are proposed in CIE 220 to support the generic spectral characterization of UV radiometers for various applications. For situations where three spectra are not sufficient for evaluating the spectral mismatch ten other light source spectra are provided in the UV News Issue 6/November2000 [2].

The report includes an explanation and methods for evaluating and correcting for spectral mismatch error assuming specific spectral responses are known. When detailed technical specifications are provided by the UV filter radiometer manufacturer, CIE 220:2016 information and methods can be employed to compare different meters.

Also included in the report:

  • Example evaluation of a UV-A radiometer designed for UV hazard assessment per ICNIRP/ACGIH guidelines
  • Short and long wavelength range response characteristics of UV radiometers and the impact on measurement results are explained
  • Recommendations for UV radiometer data sheet content and specifications
  • Uncertainty evaluation discussion including a list of major sources of uncertainty for UV radiometer calibration

 

References for CIE 220:2016

[1] CIE 220:2016 "Characterization and Calibration Method of UV Radiometers"

[2] UV news Issue6/November2000 Part A: Final report of WG1

[3] ICNIRP (International Commission on Non-Ionizing Radiation Protection) Sliney DH, Cesarini JP, De Gruijl FR, Diffey B, Hietanen M, Mainster M, Okuno T, Soderberg PG, Stuck B, eds. Guidelines on limits of exposure to ultraviolet radiation of wavelengths between 180 nm and 400 nm (incoherent optical radiation). Health Phys 87:171-186; 2004

[4] ACGIH (American Conference of Governmental Industrial Hygienists) 1992-1993 Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices ISBN: 0-936712-99-6

 

BN-LH250 Calibration Standard Lamp

Characterization and Calibration of UV Radiometers

Finally a Method for the Characterization and Calibration of UV Radiometers 

After eighteen years in the works CIE Technical Committee TC 2-47 has completed and published CIE 220:2016. [1] This technical report describes quality indices for UV radiometers, which enable manufacturers and users to characterize instruments on a common basis. To harmonize CIE documents, the quality indices described in this document relate to the quality indices described in Joint ISO/CIE International Standard ISO/CIE 19476:2014(E) (formerly CIE S 023/E:2013).

 

BN-LH250 Calibration Standard Lamp

The work began in the First Workshop of the "Thematic Network for Ultraviolet Measurements" in Espoo, March 2 and 3, 1998. The Network was funded by the Standards, Measurements and Testing programme of the Commission of the European Communities, as project number SMT4-PL96-9329.
Within the Working Group 1 "Guidance for UV power meter classification for particular applications" with chair Anton Gugg-Helminger the document "Characterizing the Performance of Integral Measuring UV-Meters" was prepared. It is published in the UV news Issue 6/November2000. [2]
This publication was then adopted by CIE technical committee TC2-47 finishing the report in 2016.
Since UV filter radiometers very often measure light sources which are spectrally different than the light sources with which they were calibrated. As a result an uncertainty occurs called spectral mismatch error, defined as the ratio of the effective responsivity of the radiometer with respect to the radiant quantity of the test source to the effective responsivity with respect to the reference source.
UV radiometers in general are designed for various actinic spectra and different spectral ranges. So instead of only one defined reference light source spectra, CIE Illuminant A, used in photometry, three reference light source spectra are proposed in CIE 220 to support the generic spectral characterization of UV radiometers for various applications. For situations where three spectra are not sufficient for evaluating the spectral mismatch ten other light source spectra are provided in the UV News Issue 6/November2000 [2].
The report includes an explanation and methods for evaluating and correcting for spectral mismatch error assuming specific spectral responses are known. When detailed technical specifications are provided by the UV filter radiometer manufacturer, CIE 220:2016 information and methods can be employed to compare different meters.
Also included in the report:
Example evaluation of a UV-A radiometer designed for UV hazard assessment per ICNIRP/ACGIH guidelines
  • Short and long wavelength range response characteristics of UV radiometers and the impact on measurement results are explained
  • Recommendations for UV radiometer data sheet content and specifications
  • Uncertainty evaluation discussion including a list of major sources of uncertainty for UV radiometer calibration
References for CIE 220:2016
[1] CIE 220:2016 "Characterization and Calibration Method of UV Radiometers"
[2] UV news Issue6/November2000 Part A: Final report of WG1
[3] ICNIRP (International Commission on Non-Ionizing Radiation Protection) Sliney DH, Cesarini JP, De Gruijl FR, Diffey B, Hietanen M, Mainster M, Okuno T, Soderberg PG, Stuck B, eds. Guidelines on limits of exposure to ultraviolet radiation of wavelengths between 180 nm and 400 nm (incoherent optical radiation). Health Phys 87:171-186; 2004
[4] ACGIH (American Conference of Governmental Industrial Hygienists) 1992-1993 Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices ISBN: 0-936712-99-6
Gigahertz-Optik is a world class manufacturer of innovative UV-VIS-NIR optical radiation measurement instrumentation for specification critical industrial, medical and research applications.

Finally a Method for the Characterization and Calibration of UV Radiometers – CIE220:2016 Technical

After eighteen years in the works CIE Technical Committee TC 2-47 has completed and published CIE 220:2016. [1] This technical report describes quality indices for UV radiometers, which enable manufacturers and users to characterize instruments on a common basis. To harmonize CIE documents, the quality indices described in this document relate to the quality indices described in Joint ISO/CIE International Standard ISO/CIE 19476:2014(E) (formerly CIE S 023/E:2013).

The work began in the First Workshop of the "Thematic Network for Ultraviolet Measurements" in Espoo, March 2 and 3, 1998. The Network was funded by the Standards, Measurements and Testing programme of the Commission of the European Communities, as project number SMT4-PL96-9329.    

Within the Working Group 1 "Guidance for UV power meter classification for particular applications" with chair Anton Gugg-Helminger the document "Characterizing the Performance of Integral Measuring UV-Meters" was prepared. It is published in the UV news Issue 6/November2000. [2]

This publication was then adopted by CIE technical committee TC2-47 finishing the report in 2016.

Since UV filter radiometers very often measure light sources which are spectrally different than the light sources with which they were calibrated. As a result an uncertainty occurs called spectral mismatch error, defined as the ratio of the effective responsivity of the radiometer with respect to the radiant quantity of the test source to the effective responsivity with respect to the reference source.

UV radiometers in general are designed for various actinic spectra and different spectral ranges. So instead of only one defined reference light source spectra, CIE Illuminant A, used in photometry, three reference light source spectra are proposed in CIE 220 to support the generic spectral characterization of UV radiometers for various applications. For situations where three spectra are not sufficient for evaluating the spectral mismatch ten other light source spectra are provided in the UV News Issue 6/November2000 [2].

The report includes an explanation and methods for evaluating and correcting for spectral mismatch error assuming specific spectral responses are known. When detailed technical specifications are provided by the UV filter radiometer manufacturer, CIE 220:2016 information and methods can be employed to compare different meters.

Also included in the report:

  • Example evaluation of a UV-A radiometer designed for UV hazard assessment per ICNIRP/ACGIH guidelines
  • Short and long wavelength range response characteristics of UV radiometers and the impact on measurement results are explained
  • Recommendations for UV radiometer data sheet content and specifications
  • Uncertainty evaluation discussion including a list of major sources of uncertainty for UV radiometer calibration

 

References for CIE 220:2016

[1] CIE 220:2016 "Characterization and Calibration Method of UV Radiometers"

[2] UV news Issue6/November2000 Part A: Final report of WG1

[3] ICNIRP (International Commission on Non-Ionizing Radiation Protection) Sliney DH, Cesarini JP, De Gruijl FR, Diffey B, Hietanen M, Mainster M, Okuno T, Soderberg PG, Stuck B, eds. Guidelines on limits of exposure to ultraviolet radiation of wavelengths between 180 nm and 400 nm (incoherent optical radiation). Health Phys 87:171-186; 2004

[4] ACGIH (American Conference of Governmental Industrial Hygienists) 1992-1993 Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices ISBN: 0-936712-99-6

 

BN-LH250 Calibration Standard Lamp

LED-SSL-Testing

New professional article online:

Possibilities of LED/SSL testing in production, laboratories, and different applications

This article will first describe the requirements of LED/SSL (LED = light emitting diode, SSL = solid state lighting) testing and the possible metrological solutions for different applications, ranging from applications in the production field and laboratory measurements, to on-site tests by users/customers. Gigahertz-Optik has over 30 years of experience in light measurement technology, and has taken a very innovative path in spectral measurement with the BTS technology.

 

For the full article please visit:

https://www.gigahertz-optik.com/en-us/service-and-support/knowledge-base/ssl-testing-en/

 

Tutorial – Basics of Light Measurement

This tutorial is an introduction to the radiometric, photometric, colorimetric, reflection and transmission principles as well as quantities, symbols, units and the basic nature of light and color. Sections covering some topical applications, detectors, electronics and calibration are also included.

Tutorial – Basics of Light Measurement

The LCRT-2005-S is a spectral light transmission meter for light transmission measurement under diff

The term haze is usually used to refer to the scattering effect of samples on penetrating light. It is hereby often not taken into account, that according to ASTM D 1003, haze is only defined for thin films used for laminated safety glass. As for films and thin sheets such as those used in displays, varying measurement set-ups often provides better signal contrast.

The LCRT-2005-S meter, in combination with the BTS-40-TRTH accessories, makes it possible to measure light transmission of the sample under different illumination conditions. This hence enables the user to determine the best measurement set-up for his/her specific application.

Detailed information on this measurement device can be found under LCRT-2005-S.