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Spectral Light Meters for Photometric and Colorimetric Measurements

Comprehensive range of spectroradiometers for the measurement of illuminance (lux), luminance (cd/m²), luminous flux (lumens), luminous intensity (cd) as well as the colorimetric characteristic values such as chromaticity coordinates (x,y,u',v') or color rendering index (CRI), etc.

For color measurements the spectroradiometric measured spectral distribution is used to determine all parameters based on mathemetical derivations. For instance the XYZ color matching functions defined by the CIE 1931 standard colorimetric observer. Or the color matching functions defined by the CIE 1964 supplementary standard colorimetric observer. Please see our basic of light tutorial with extensive information about color measurements.

For precise spectroradiometric color measurements especially a accurate wavelength calibration and absolute radiometric calibration is needed. Further mathematical corrections like bandpass correction according to CIE214 increase the accuracy even further. Of course the fundamental meter should be designed in order to match the needs with e.g. spectral range and optical bandpass width.

Further application relevant parameters for color spectroradiometers/spectral color meters are e.g. mobile use, temperature correction or WiFi connection. For stationary use a selection of interfaces like USB or Ethernet and entrance optics like Integrating Sphere Based Spectroradiometer Systems or goniometer are needed.

Spectroradiometers for measuring illuminance (lux) and chromaticity metrics

Model Image Wavelength range / nm Optical Bandwidth Entrance Optic Measurement range Remark
MSC15 MSC15 mitScreen2 360 - 830

10 nm

optical bandwidth correction applied according to CIE 214

Diffuser window with 10mm diameter, cosine corrected field of view, f2 ≤ 3 %

Inexpensive spectral light meter for common measurement tasks in general lighting.
BTS256-EF BTS256 EF ausschnitt 360 - 830

10 nm, mathematical optical bandwidth correction according to CIE 214 can be automatically applied

Diffuser window with 20mm diameter, cosine corrected field of view, f2 Error ≤ 3%

199,999 lx ≤ 5ms (white light)

100 lx ≤ 1s (white light)

Precise, low-scatter spectroradiometer with Bi-Tec sensor for PWM light and flicker measurements.
CSS-45 CSS 45 2header 360 - 830

10 nm

optical bandwidth correction applied according to CIE 214

 

Diffuser window with 10 mm diameter, cosine corrected field of view, f2 ≤ 1.5 %

Spectroradiometer sensor with RS485 and USB interface. Internal electro-mechanical shutter
CSS-45 with CSS-D Gigahertz Optik CSS 45 CSS D sensor 4 gesp6 360 - 830
CSS-45 with Display unit CSS-D
BTS256-LED-DA BTS256 LED DA 360 - 830

Bayonet adapter with diffuser window. 20 mm diameter of the diffuser window. ± 30° cosine corrected field of view. 5 % cosine correction within the specified range.

Universal spectroradiometer with diffuser accessories from the BTS256-LED Plus Concept.
BTS2048-VL BTS2048 VL persepktive 280 -1050

2 nm

Diffusor, cosine corrected field of view (f2 ≤ 3 %)

10lx    2,5s      *10
100lx    250ms      *10
1000lx    25ms      *10

Versatile High End Spectroradiometer
BTS2048-VL-TEC BTS2048 VL TEC persepktive 280 -1050

2 nm

Diffusor, cosine corrected field of view (f2 ≤ 3 %)

10 lx        2,5 s           *10
100 lx      250 ms      *10
1000 lx    25 ms        *10

BTS2048-VL including temperature control
BTS2048-UVVISNIR BTS2048 UVVISNIR persepktive 200 - 900

2 nm

Diffusor, cosine corrected field of view (f2 ≤ 3 %)

10 lx        3 s           *10
100 lx      300 ms      *10
1000 lx    30 ms        *10

Versatile High End spectroradiometer from UV to NIR
BTS2048-VL-F BTS2048 VL F 280 -1050

2 nm

Light guide adapter F16-F

Fiber bundle input. Optional fiber and cosine diffusor accessories
BTS2048-VL-TEC-F BTS2048 VL F 280 -1050

2 nm

Light guide adapter

CCD sensor with Peltier cooling for maximum integration times. Fiber input.

Integrating sphere based spectroradiometer systems for measuring luminous flux (lumens) and chromaticity metrics

Model Image Integrating sphere Source emission Wavelength range / nm Optical Bandwidth Measurement range (*1) Remark
BTS256-LED BTS256 LED 50 mmØ
2-Pi (10 mmØ)
360 - 830
5 nm 10 mlm - 70000 lm
Handheld spectroradiometer with internal integrating sphere for luminous flux. Can be upgraded with accessories of the BTS256-LED Plus Concept universal spectroradiometer.
ISD-21-BTS256-LED ISD 21 V01 webHeader1 210 mmØ
2-Pi (63.5 mmØ)
360 - 830
5 nm 0.3 lm to 35000 lm
Universal spectroradiometer with 21 cm integrating sphere for luminous flux of 2Pi lamps from the BTS256-LED Plus Concept accessories range.
ISD-50-BTS256-LED ISD 50 V01withBTS256 LED 500 mmØ
2-Pi (127 mmØ)
360 - 830
5 nm 1.2 lm to 120,000 lm
Universal spectroradiometer with 50 cm integrating sphere for luminous flux of 2Pi lamps from the BTS256-LED Plus Concept accessories range.
ISD-50HF-BTS256-LED ISD 50HF BTS256 LED.58 500 mmØ
4-Pi or 2-Pi (127 mmØ)
360 - 830
5 nm 1.2 lm to 120,000 lm
Universal spectroradiometer with 50 cm opening integrating sphere for luminous flux of 4Pi and 2Pi lamps from the BTS256-LED Plus Concept accessories range.
ISD-100HF-BTS256-LED ISD 100HF BTS256 LED offen.64 1000 mmØ
4-Pi or 2-Pi (254 mmØ)
360 - 830
5 nm 4 lm to 400,000 lm
Universal spectroradiometer with 100 cm opening integrating sphere for luminous flux of 4Pi and 2Pi lamps from the BTS256-LED Plus Concept accessories range.
ISD-15-BTS2048-VL ISD 15 BTS2048 VL 150 mmØ
2-Pi (35 mmØ)
350 -1050
2 nm 2 lm to 16000 klm
Compact spectroradiometer for in-line LED binning. Integrating sphere with dust-proof measuring aperture.
ISD-25-BTS2048-VL ISD25 BTS2048 VL KugelOhneScheibe Schatten web4 250 mmØ
2-Pi (76 mmØ)
350 -1050
2 nm 5.5 mlm - 43000 klm
Compact spectroradiometer system for luminous flux and light color with expandable measuring aperture plate on integrating sphere
ISD-100HF-BTS2048-VL ISD 100HF BTS2048 VL3.42 1000 mmØ
4-Pi or 2-Pi (254 mmØ)
350 -1050
2 nm 0.1 lm - 700000 klm
Multi-sided integrating sphere measuring system with 1m diameter for larger lamps in 2Pi and 4Pi measurement geometry
ISD-15 + CSS-45 ISD 15 Si.64 150 mmØ
2-Pi (35 mmØ)
360 - 830
10 nm

optical bandwidth correction applied according to CIE 214
Example configuration of the CSS45 spectroradiometer sensor with integrating sphere
BTS256-LED Plus Concept BTS256 LED Plus Konzept 50 mmØ + external
2-Pi / 4-Pi
360 - 830
5 nm External sphere dependent
Handheld spectroradiometer with integrated integrating sphere for luminous flux. Can be upgraded to the universal spectroradiometer with the accessories of the BTS256-LED Plus Concept.
TPI21-TH TPI21 TH content1 215 mmØ
2-Pi
350 -1050
2 nm 0.5 mlm - 200,000 lm
Automated LED test system, CIE S 025 / LM-79-08 compliant
TFCT25 TFCT25 web mSchatten 250 mmØ
2-Pi
350 -1050
2 nm 0.05 mlm - 141 klm
Spectral transmission & luminous flux test system for lateral light-emitting light guides used in front and rear automotive lighting

(*1) Using BiTec Spectral &  V(λ) Sensors

See also:  Broadband Light Meters for Photometry

 

 

Spectroradiometers with entrance optics for the measurement of luminous intensity (cd) and CIE 127 averaged intensity.  Compatible with or part of goniometer systems.

Model Image Measurement Geometry Wavelength range / nm Measurement range V(λ) sensor Measurement range - Spectral sensor Remark
BTS256-LED-IB BTS256 LED Tester ILED B Average Intensity CIE condition B
360 - 830
7.5 mcd - 100 Mcd
Averaged LED intensity CIE127 B adapter for versatile BTS256-LED
BTS2048-VL-CP-ILED-B-IS-1.0-HL BTS2048-VL_mit_ILEDB Average Intensity CIE condition B
350 - 1050
0.15 mcd - 420 kcd
15 mcd - 150000 kcd
For LED binning / LED test systems CIE 127 condition B (Averaged LED intensity)
GB-GD-360-RB40-2-BTS256-LED GB GD 360 BTS256 Goniometer 2-Pi distance 100 - 2000mm
360 - 830
0.2cd - 250000 kcd (*1)

40cd - 4000 kcd (*1) Goniometer for versatile BTS256-LED spectroradiometer
GB-GD-360-RB40-2-BTS2048-VL GB GD 360 BTS2048.12 Goniometer 2-Pi distance 100 - 2000mm
350 -1050
0.1 cd - 3E8 cd (*1)
 6 cd - 1000 kcd (*1)
Goniometer for high speed spectroradiometer of BTS2048 series

(*1)At 1m distance

See also:  Broadband Light Meters for Photometry

 

 

Spectroradiometers with entrance optics for the measurement of luminance (cd/m²) and spectral power distribution

Please contact sales for further information!