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info@gigahertz-optik.de

Gigahertz-Optik, Inc.
Phone: +1-978-462-1818
info-us@gigahertz-optik.com

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Detectors

A detector head comprises one or more photodiodes each with an appropriate optical bandpass filter, diffuser, lens assembly, integrating sphere or other optical elements. Detector heads are calibrated in the Gigahertz-Optik GmbH's calibration laboratory. .

This modular range of broadband light meters and radiometers offer the possibility of individual configuration. Customers can choose from a wide selection of optometers, amplifiers, detector heads and accessories. In addition to its standard products, Gigahertz-Optik also offers customized solutions.

Step 1: As a first step we recommend the selection of a detector head. It is also possible to use several detector heads, which can be used interchangeably with single-channel meters or simultaneously with multi-channel meters. The selection criteria for a detector head include the required measurement quantity and range, its spectral function, and all other parameters relevant to the intended use.

Step 2: In the second step, accessories such as e.g. an integrating sphere can be selected. If the accessory changes the detector head’s measurand geometry and responsivity, an additional calibration for the detector head with accessories in the corresponding measurand must be selected.

Step 3: In the third step, the meter is selected. The planned use (e.g. mobile, stationary, manual or remote-controlled), the number of signal channels, the measurement  mode (CW, dose, pulse energy, temporal pulse progression) are all decision criteria.

Step 4: The connection of the measuring device for the detector head determines the connector type of the detector head. Gigahertz –Optik’s detectors are designed with connectors of the following four types:

  • Connector Type -1: Conventional BNC coaxial connector        
  • Connector Type -2: Calibration Data Connector with Eprom for storing the detectors data (type, calibrated responsivity) read by the connected meter.
  • Connector Type -4: Compact plug for detector heads with up to four photodiodes.
  • Connector Type -5: Compact plug with calibration Eprom

Step 5: To determine the measuring range of a selected configuration, two specifications of the selected detector head and meter are required.

The typical sensitivity (e.g. A / lx) and the max. permissible signal current of the detector head.

The minimum and maximum input signal of the measuring range of the meter.

Detection Limit (Noise Equivalent Power, N.E.P.) = Minimum input signal of the meter (A) / typical detector sensitivity (e.g., 0.1 pA / 3 nA / (mW / cm²) = 0.33 nW / cm². (*1) (*2)

Maximum reading = maximum input signal from the meter (A) / typical detector sensitivity (e.g., 20 μA / 3 nA / (mW / cm²) = 6.66 W / cm². (*3)                                                                                                                                           

Remarks:                                                                                                                                                   

(*1) The minimum measurable value of the broadband light meter or radiometer results from the desired signal-to-noise ratio (S / N). For a DIN Class A lux meter, e.g. a minimum S / N of 100 is given. For the detector head of the example calculation, an S / N of 100 would mean a minimum measureable value of 33 nW / cm². For applications in the limit area of optical radiation measurement technology, it is common to use lower S/N of 50 or even 10.                                                                                                                                                

(*2) In the case of very low detector current signals, movements of the cable between the detector head and the meter can lead to short, capacitive interference signals. In addition, strain effects on the plug of the detector head may increase the noise signal.                                                                                                                                         

(*3) The maximum calculated measurement value reflects the large dynamic range of semiconductor photodiodes. In practical application, however, the maximum measurable value is often limited by the temperature radiation contained in the measured optical radiation, which would mean unacceptable heating of the detector head.

Detectors Model Photo Measured quantity Spectral function Typical responsivity Input optics / size FOV or Aperture Remarks
VL-3701 VL3701 3.64 Illuminance (lux) Photopic; f1 ≤ 3%
0.5 nA/lx Diffuser / 7mmØ
Cosine; f2 ≤ 1.5%
DIN 5032 Class A precision photometric. Suitable for measuring white LEDs
VL-3702 VL3701 1.64 Illuminance (lux) Photopic; f1 ≤ 6%
0.5 nA/lx Diffuser / 7mmØ
Cosine; f2 ≤ 3%
DIN 5032 Class B photometric
VL-3704 vl3704 Illuminance (lux) Photopic; f1 ≤ 5%
20 pA/lx Diffuser / 7mmØ
Cosine; f2 ≤ 3%
Typically used with X1 / P-9802 optometers
VL-3705 vl3705 Illuminance (lux) Scotopic; f1 ≤ 5%
0.3 nA/lx Diffusor / 7mmØ
Cosine; f2 ≤ 3%
DIN 5032 Class B scotopic specification
VL-3707 Messkopfnlx header neu3 Illuminance (lux) Photopic 12 nA / lx Diffuser Cosine For very low light level, from <100 μlx to > 80,000 lx
VL-3701 with SRT-M37-L1
vl3701s Luminance (cd/m²) Photopic
1.2 pA/(cd/m²) Lens / 22.4 mmØ
1° FOV divergent
Spot luminance measurement of large illuminated areas
VL-3701 with SRT-M37-L2
vl3701s Luminance (cd/m²) Photopic
5 pA/(cd/m²) Lens / 22.4 mmØ
2° FOV divergent
Spot luminance measurement of large illuminated areas
VL-3701 with SRT-M37-L5
vl3701s Luminance (cd/m²) Photopic
30 pA/(cd/m²) Lens / 22.4 mmØ
5° FOV divergent
Spot luminance measurement of large illuminated areas
LDM-9901
ldm9901 Luminance (cd/m²) Photopic, f1 ≤ 5 %
25 pA/(cd/m²) Lens / 22 mm Ø
1.1° FOV
LDM-9811 with PD-16-VL
ldm9811 Luminance (cd/m²) Photopic
See detailed specification in the data sheet
ISD-5-VL
isd5l luminous flux (lm) Photopic, f1 ≤ 5 %
25 nA/lm Sphere / 50 mmØ
12mmØ
2-Pi luminous flux measurement e.g. of endoscopes
ISD-10-VL
ISD 10 VL.57 luminous flux (lm) Photopic, f1 ≤ 5 %
50 nA/lm Sphere / 100 mmØ
15mmØ
ISD-15P-VL
ISD 15P VL.71 luminous flux (lm) Photopic, f1 ≤ 5 %
25 nA/lm Sphere / 150 mmØ
38.1 mm Ø
Model Image Measured quantity Spectral function Wavelength range (nm) Typical responsivity Input Optic / Size (mm) Remarks
UV-3701
uv1 Irradiance (W/m²) UV-A
UV-A 315-400 nm 4 nA/(W/m²)
Diffuser / 11mmØ
CIE / DIN defined UV-A range
UV-3702
uv1 Irradiance (W/m²) UV-B
UV-B 280-315 nm 1.7 nA/(W/m²)
Diffuser / 11mmØ
CIE / DIN defined UV-B range
UV-3703
uv1 Irradiance (W/m²) UV-C
UV-C (200)250-280 nm 2 nA/(W/m²)
Diffuser / 11mmØ
CIE / DIN UV-C from 250 nm
UV-3710
uv10 Irradiance (W/m²) UV-A

UV-A (320 - 400) nm

7 nA/(W/m²)
Diffuser / 11mmØ
Alternative UV-A range (e.g. non-biological applications)
UV-3711
uv10 Irradiance (W/m²) UV-B
UV-B 280-320 nm 3 nA/(W/m²)
Diffuser / 11mmØ
Alternative UV-B range (e.g. non-biological applications)
UV-3711-308
uv3711 Irradiance (W/m²) UV-B 308nm
UV-B 308 nm 3 nA/(W/m²)
Diffuser / 11mmØ
UV-B detector for Excimer sources
UV-3716
uv10 Irradiance (W/m²) UV-A
UV-A 305-400 nm 10 nA/(W/m²)
Diffuser / 11mmØ
Alternative UV-A range
UV-3717
uv10 Irradiance (W/m²) UV-A, visible blind
UV-A 325-400 nm 1 nA/(W/m²)
Diffuser / 11mmØ
Highest blocking of visible radiation
UV-3718
UV 3726 Irradiance (W/m²) Narrowband UV-C
UV-C 254 nm 2 nA/(W/m²)
Diffuser / 11mmØ
High intensity UV-C 254nm sources
UV-3719
uv10 Irradiance (W/m²) Broadband UV

UV 250 nm - 400 nm

1.9 nA/(W/m²)
Diffuser / 11mmØ
Broadband UV radiation
UV-3720
UV 3726 Irradiance (W/m²) UV-BC

UV 240 nm - 320 nm

260 pA/(W/m²)
Diffuser / 11mmØ
UV-B and UV-C reponsivity
UV-3725
UV 3725 Irradiance (W/m²) Narrowband UV-C

UV-C 254 nm

2 nA/(W/m²)
Diffuser / 11mmØ
Wide dynamic range UV-C 254nm e.g. for air disinfection
UV-3726 x911 1 Irradiance (W/m²) UV-C

UV 240 nm - 320 nm

50 µA / (W / cm2) @254nm 11 mm Ø diffuser Low pressure Hg lamps (254 nm) and UV LEDs (250-300 nm)
UV-3727 UV 3727.127 Irradiance (W/m²) UV-C / B (200 - 310 nm)

UV 200 nm - 310 nm

57.5 µA / (W / cm2) @254 nm 19.2 mm Ø diffuser Excimer lamps (222nm), Low pressure Hg lamps (254 nm) and UV LEDs (250-300 nm)
UV-37 with SRT-M37-L-UV
SRT M37 L Lens with SRT M45 Radiance (W/(m²sr)) Detector head dependent
Front lenses for UV-37 detectors
22.4 mmØ; 1°, 2°, 5° or 10° FOV divergent

Broadband detectors for UV curing

Model Image Spectral function Wavelength range / nm Typical responsivity Input Optic / Size (mm) F.O.V. Remark
RCH-102
RCH detector UV-A Blue
(320 - 460) nm 0.6 nA/(mW/cm²) @ 405 nm LED
Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Rigid light guide.
RCH-106
RCH detector Broadband UV
(250 - 400) nm 1.8 nA/(mW/cm²) @ 365 nm LED
Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Rigid light guide.
RCH-108
RCH detector Narrowband UV-A
365 nm peak
0.5 nA/(mW/cm²) @ Medium pressure lamp
Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Rigid light guide.
RCH-109
RCH detector Narrowband Blue
430 nm peak
0.4 nA/(mW/cm²) @ Medium pressure lamp Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Rigid light guide.
RCH-110
RCH detector UV-BC
(240 - 320) nm 0.7 nA/(mW/cm²) @ 254 nm
Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Rigid light guide.
RCH-111
RCH detector Narrowband UV-A (350 - 400) nm 1.6 nA/(mW/cm²) @ 365 nm LED
Diffuser / 9mmØ
Cosine
For medium pressureUV lamps. Rigid light guide.
RCH-112
RCH detector Blue
(400 - 450) nm 3.1 nA/(mW/cm²) @ Medium pressure lamp
Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Rigid light guide.
RCH-113
RCH detector UV-VIS
(305 - 485) nm 0.5 nA/(mW/cm²) @ 365 nm LED
Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Rigid light guide.
RCH-116
RCH detector UV-A Blue
(350 - 450) nm 1.8 nA/(mW/cm²) @ 365 nm LED Diffuser / 9mmØ
Cosine
LED-Sources @ 365, 375, 385, 395, 405 & 430 nm. Rigid light guide.
RCH-002
rch0 header UV-A Blue
(320 - 460) nm 0.6 nA/(mW/cm²) @ 405 nm LED Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Flexible light guide.
RCH-006
rch0 header Broadband UV
(250 - 400) nm 1.8 nA/(mW/cm²) @ 365 nm LED
Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Flexible light guide.

RCH-008
rch0 header Narrowband UV-A
365 nm peak 0.5 nA/(mW/cm²) @ Medium pressure lamp
Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Flexible light guide.
RCH-009
rch0 header Narrowband Blue
430 nm peak 0.4 nA/(mW/cm²) @ Medium pressure lamp Diffuser / 9mmØ

Cosine
For medium pressure UV lamps. Flexible light guide.
RCH-010
rch0 header UV-BC
(240 - 320) nm 0.7 nA/(mW/cm²) @ 254 nm
Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Flexible light guide.
RCH-011
rch0 header Narrowband UV-A (350 - 400) nm 1.6 nA/(mW/cm²) @ 365 nm LED Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Flexible light guide.
RCH-012
rch0 header Blue
(400 - 450) nm 3.1 nA/(mW/cm²) @ Medium pressure lamp Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Flexible light guide.
RCH-013
rch0 header UV-VIS
(305 - 485) nm 0.5 nA/(mW/cm²) @ 365 nm LED
Diffuser / 9mmØ
Cosine
For medium pressure UV lamps. Flexible light guide.
Model Image Measured quantity Spectral function Wavelength range / nm Typical responsivity Input Optic / Size (mm) Remark
RW-3701
rw3701 Irradiance (W/m²)
Radiometric Blue

radiometric (400 - 500) nm

35 nA/(W/m²)
Diffuser / 11mmØ
RW-3702
rw2 Irradiance (W/m²) Radiometric Red

radiometric (700 - 800) nm

400 nA/(W/m²)
Diffuser / 11mmØ
RW-3703
rw3 Irradiance (W/m²) Radiometric VIS

radiometric (400 - 800) nm

1.5 nA/(W/m²)
Diffuser / 11mmØ
RW-3704
rw4 Irradiance (W/m²) Radiometric NIR

radiometric (800 - 1000) nm

40 nA/(W/m²)
Diffuser / 11mmØ
RW-3705
rw5 Irradiance (W/m²) Radiometric VISNIR

radiometric (400 - 1000) nm

10 nA/(W/m²)
Diffuser / 11mmØ
RW-3708
rw8 Irradiance (W/m²) Radiometric NIR

radiometric (950 - 1700) nm

40 nA/(W/m²)
Diffuser / 11mmØ
RW-37 with SRT-M37-L
srt37 Radiance (W/(m²sr)) Detector head dependent
Diffuser / 11mmØ
Front lenses for RW-37 detectors
Model Image Wavelength range / nm Typical responsivity Input Optic / Size (mm) Remark
XD-9501
xd9501

Ch 1: UV-A 315 nm - 400 nm
Ch 2: UV-B 280 nm - 315 nm

 

17nA/(W/m²)
2.5nA/(W/m²)
Diffuser / 8mmØ
UV Phototherapy, with 311nm calibration

XD-9502
xd95024

Ch 1: UV-A (315 - 400) nm

Ch 2: Photopic; f1 ≤ 6% (380 - 780) nm

Ch1: 10nA/(W/m²)
Ch2: 0.05 nA/lx
Diffuser / 8mmØ
NDT testing UV-A + lux

XD-9503
xd9503

Ch 1: UV-A Peak 380 nm: (315 - 400) nm

Ch 2: UV-B Peak 311 nm: (280 - 315) nm

Ch1: 7nA/(W/m²)
Ch2: nA/(W/m²)
Diffuser / 8mmØ
UV Phototherapy, TL01 and TL12 lamps



XD-9506
xd9506s

Ch 1: Actinic UV-AB (320 - 400) nm

Ch 2: Actinic UV-BC (250 - 320) nm

 

Ch1: 4µA/(W/m²)
Ch2: 1.5nA/(W/m²)
Diffuser / 8mmØ
ICNIRP/ACGIH Actinic UV / IEC EN 62471

XD-9509
xd9509s

Ch 1: Erythema UV-Aeff (320 - 400) nm

Ch 2: Erythema UV-BCeff (250 - 320) nm

Ch1: 1µA/(W/m²)
Ch2: 3.8nA/(W/m²)
Diffuser / 8mmØ
CIE Erythemal spectral function

XD-9510
xd9510s

Ch 1: Suv(λ) UV-AB (320 - 400) nm

Ch 2: Suv(λ) UV-BC (250 - 320) nm

Ch1: 4µA/(W/m²)
Ch2: 1.5nA/(W/m²)
Diffuser / 8mmØ
Actinic UV DIN EN 12198

See also:  Light hazard meters                See also:  Photomedicine light meters

Laser power detector heads for the measurment of radiant flux (W)

Model Image Wavelength range / nm Typical responsivity Max. signal current Input Optic / Size (mm) Aperture Remarks
ISD-1.6-SP-Vxx ISD 1.6 xx.49 gesp

(400 - 1100) nm

V0x: 8.4 µW/A @900nm

V01: 6.0 µW/A @900nm

1 mA (photodiode used for absolute measurement)

Sphere / 16 mmØ V0x: 5 mm

V01: 7 mm
Time resolved pulse shape and absolute pulse energy.
ISD-5-Si
ISD 5 Si

(400 - 1100) nm

 

2.9E-3 A/W @ 630 nm

1 mA

Sphere / 50 mmØ
12.7 mm Ø
ISD-3P-Si
isd3p

(400 - 1100) nm

8.87E-04 A/W @ 900 nm

1 mA

Sphere / 30 mmØ
5 mm Ø
ISD-3P-IGA
isd3p

(800 - 1800) nm

0.17E-04 A/W @ 1300 nm

1 mA

Sphere / 30 mmØ

5 mm Ø
ISD-5P-Si
ISD 5P Standard header

(400  - 1100) nm

2.5E-03 A/W @ 630 nm

1 mA

Sphere / 50 mmØ
12.7 mm Ø
ISD-5P-IGA
ISD 5P Standard header

(800 - 1800) nm

0.2 mA/W @ 1400 nm

1 mA

Sphere / 50 mmØ
12.7 mm Ø
ISD-10-Si
ISD 10 Si.56

(400 - 1100) nm

1.6 mA/W @ 633 nm

1 mA

Sphere / 100 mmØ
15 mm Ø
ISD-15-Si
ISD 15 Si.62

(400 - 1100) nm

60 µA/W @ 633 nm

1 mA

Sphere / 150 mmØ
38.1 mm Ø
ISD-30
isd30si3

(400 - 1100) nm or (800 - 1800) nm

0.2 mA/W @ 633 nm
0.25 mA/W @ 900 nm
25 µA/W @ 1300 nm
18 µA/W @ 1550 nm

1 mA

Sphere / 300 mmØ
100 mm Ø
Two detectors Si and IGA
ISD-1.6-Si
isd16

(400 - 1100) nm

V0x: 8.4 µW/A @900 nm
V01: 6.0 µW/A @900 nm

1 mA

Sphere / 16 mmØ
V0x: 5 mmØ
V01: 7 mmØ
Pulse energy and pulse shape of ns pulses
Model Image Spectral function Wavelength range / nm Typical responsivity Max. signal current Aperture Remarks
PD-1101
pd11 UV Si photodiode
(250 -1100) nm 0.15 A/W @ 350 nm 0.5 A/W @ 900 nm
1 mA
3.6 mm x 3.6 mm
For combining with integrating spheres, optics, filters and mechanical components
PD-1102
pd11 InGaAs photodiode
(800 -1800) nm 0.85 A/W @ 1350 nm 0.95 A/W @ 1500 nm
1 mA
0.3 mm Ø
For combining with integrating spheres, optics, filters and mechanical components
PD-1103
pd11 InGaAs photodiode
(800 -1800) nm 0.85 A/W @ 1350 nm 0.95 A/W @ 1500 nm
1 mA
1 mm Ø
PD-1104
pd11 InGaAs photodiode
(800 - 1800) nm 0.85 A/W @ 1350 nm 0.95 A/W @ 1500 nm
1 mA
3 mm Ø
For combining with integrating spheres, optics, filters and mechanical components
PD-1105
pd11 SiC photodiode
(215 - 360) nm 0.16 A/W @ 270 nm
50 µA
1.25 mm x 1.25 mm
PD-1109
pd11 GaP photodiode (250 - 550) nm 0.07 A/W @ 350 nm
100 µA
2.2 mm x 2.2 mm
For combining with integrating spheres, optics, filters and mechanical components
PD-1112
pd11 GaAsP (UV) photodiode
(200 - 680) nm 0.035 A/W @ 254 nm 0.17 A/W @ 633 nm
1 mA
2.3 mm x 2.3 mm
For combining with integrating spheres, optics, filters and mechanical components
PD-1113
pd11 GaAsP (Vis) photodiode
(400 - 760) nm 0.22 A/W @ 560 nm 0.29 A/W @ 633 nm
1 mA
2.3 mm x 2.3 mm
For combining with integrating spheres, optics, filters and mechanical components
PD-1115
pd11 Si PIN photodiode
(400 - 1050) nm 0.5 A/W @ 900 nm
1 mA
0.8 mm Ø
For combining with integrating spheres, optics, filters and mechanical components
VL-1101
1101 Photopic; f1 ≤ 5%
(380 - 780) nm 0.3 nA/lx
1 mA
1.1 mm Ø
Modular photometric detector
TD-11VL01
td1101 1 Photopic; f1 ≤ 5%
(380 - 780) nm 1 mA 2,7 x 2,7 mm behind filter Temperature stabilised. Typically used as monitor detector on integrating spheres.
Model Image Spectral function Wavelength range / nm Typical responsivity Max. signal current Aperture Remarks
MD-37-GP6 md37u GaP photodiode
(250 - 550) nm 0.07 A/W @ 350 nm
100 µA
2.5 mm x 2.5 mm
MD-37-GAP-UV
md37u GaAsP (UV) photodiode
(200 - 680) nm 0.035 A/W @ 254 nm 0.17 A/W @ 633 nm
100 µA
2.3 mm x2.3 mm
MD-37-GAP-VIS
md37u