This Product is discontinued, please contact us if you are still interested. An alternative is e.g:

Flexible applicable uniform light source

Integrating sphere light source 

The integrating sphere is a “Uniform Light Source” and provides an illumination field that exhibits a magnificent level of luminance homogeneity. 

Halogen lamps 

Halogen lamps provide a continuous luminous spectrum and are therefore preferred for spectral radiance and luminance calibration standards. 

Calibration standard for the spectral radiance 

Calibration of the spectral radiance of the illumination field makes it possible to use of the integrating sphere light source as a calibration standard for the comparison of spectral radiometers for spectral radiance as well as imaging spectrometers. In these applications, the halogen lamps are operated at a 3100K color temperature so as to ensure maximum intensity in the blue spectrum. 

Calibration standard for the luminance 

It is predefined that standard illuminant A with a 2856K color temperature should be used for calibration of the luminance responsivity of luminance measurement devices. 

ISS-17-VA integrating sphere light source 

The adjustable aperture between the light source and the integrating sphere makes it possible to adjust the intensity of the spectral radiance and luminance at constant color temperature. The luminance is displayed as a reference value. Besides the luminance, the monitor detector also measures the color temperature. This makes it possible to set up the light source for both temperatures: 2856K and 3100K. Furthermore, the color temperature can be readjusted making it possible to utilize the typical 2000 operation hours of the halogen lamps. A diffuser window can be fixed between the light source and the sphere to improve diffuse light distribution in the integrating sphere. 

ED-ISS-100-MD control electronic

The control electronic designed and manufactured by Gigahertz-Optik is set-up with a precise power supply and an optometer ensures high precision during operation of the integrating sphere light source. 

 Traceable calibration 

Calibration of the luminance, spectral radiance and color temperature is performed by the Gigahertz-Optik calibration laboratory for optical measurands. The calibration is done in reference to a calibration standard whose spectral radiance was calibration by the national measurements laboratory. The calibration and its results are confirmed by a corresponding calibration certificate that conforms to the ISO 17025.

ISS-17-VA with reference detector

Spectral radiance of the ISS-17-VA at 3100K from 300nm to 2500nm.

The ISS-17-VA can be operated at both color temperatures:2856K and 3100K
The ISS-17-VA-V01 provides high color temperature consistency across the entire luminance operation range
The ISS-17-VA offers an excellent uniformity of the Luminance distribution of typical +/-0,5% to the center point and +/-0,3% to the average value
Integrating sphere

170 mm internal diameter (Base sphere model UMTB-170-S-1) with barium sulfate coating (ODP97).


Pressure and suction fan for lamp cooling; 12V

Light Source

Halogen lamp 12V/100W, frosted (LH-100F-UV)

Control electronics

ED-ISS-100-MD elektronic device in a 3/4 19“ rack mounting.

Lamp power supply

Precision power adapter for halogen lamps with a16bit D/A converter for the lamp current. Ramp function during switching on/off for stress reduction of the lamp filament. RS232 interface for remote control using the optometer (LPS-100-RM). This power supply is part of the ED-ISS-100-MD.

Power Supply

AC input for (115 - 230) V / (50 - 60) Hz to the ED-ISS-100-MD. The electronic device ED-ISS-100-MD supplies the optometer, lamp power supply and fans.

Integral Detector
Monitor detector

RGB detector (CT-4501-4) calibrated for the luminance and color temperature


Display of the luminance and color temperature in connection iwth the monitor detector. Control function for the lamp power adapter for regulation of the color temperature (X1-RM)


Spectral Radiance: At 2856 K and 3100 K, spectral range 380 nm to 780 nm in 10 nm steps, including calibration certificate


Luminance: at 2856 K with calibration certificate

Light Output Port

50 mm with resolution tube to suppress the lateral incident light (UMPA-2.0-xx)


better 98 %

Luminance (with diffuser window) 2856K

typ. (3 - 7.500) cd/m²

min. (3 - 6.500) cd/m²

Luminance (with diffuser window) 3100K

typ. (5 - 15.000) cd/m²

min. (5 - 13.000) cd/m²

Spectral Radiance (with diffuser window) 2856K

22 mW/(m²sr) @ 380nm, aperture 100% open
360 mW/(m²sr) @ 800nm, aperture 100% open

Spectral Radiance (with diffuser window) 3100K

46 mW/(m²sr) @ 380 nm, aperture 100 % open
750 mW/(m²sr) @ 800 nm, aperture 100 % open

temperature range

± 50 K over the specified intensity range

temperature range

(+5 to +30) °C, no condensation

Type Description File-Type Download
Datasheet ISS-17-VA PDF
Dimensions ISS-17-VA sphere PDF
Dimensions ISS-17-VA electronics PDF
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15298134 ISS-17-VA-V01

Integrating sphere calibration standard. Including Light source, electronics and calibration certificate.

15308072 ISS-17-VA-V03

Integrating sphere calibration standard. Including Light source and electronics. No calibration.

15310690 K-ISS17VA-V01

Calibration of Luminance and Spectral Radiance at 2856K and 3100K within the spectral range from 380-2500nm in 10nm steps. Aperture complete open.  Calibration certificate.

15300517 K-ISS17VA

Calibration of Luminance and Spectral Radiance at 2856K and 3100K within the spectral range from 380-800nm in 10nm steps. Aperture complete open.  Calibration certificate.

15297388 UMPF-LSOK30-DTB

Diffuse transmitting window for use in UMPF-LSOK30.