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 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.
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.
Spectral radiance of the ISS-17-VA at 3100K from 300nm to 2500nm.
170 mm internal diameter (Base sphere model UMTB-170-S-1) with barium sulfate coating (ODP97).
Pressure and suction fan for lamp cooling; 12V
Halogen lamp 12V/100W, frosted (LH-100F-UV)
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.
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.
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
|Spectral Radiance (with diffuser window) 3100K||
46 mW/(m²sr) @ 380 nm, aperture 100 % open
± 50 K over the specified intensity range
(+5 to +30) °C, no condensation
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