ISS-17-VA

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 lamp or LEDs on request

Halogen lamps provide a continuous luminous spectrum and are therefore preferred for spectral radiance and luminance calibration standards. Especially for spectral measuring devices. On request we also offer LED based integrating sphere light sources.

Integral or spectral monitor detector

Sphere output is checked using a monitor detector. Both photodiode based integral detectors (CT-4501) and spectroradiometers (CSS-45) are available.

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. High Dynamic Range Test and Calibration of Imaging and non-Imaging Devices as well as imaging spectrometers or pixel alignment are also major applications. 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. 

ISS-17-VAM version with automatic remote controlled variable aperture is additionally to the manual aperture version ISS-17-VA available.

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.