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15 October 1993 Variable-intensity large-area illuminator for photodetectors and image sensors
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Photometric or radiometric characterization of detectors or detector arrays requires uniform, stable illuminance or irradiance. For the measurement of linearity or spectral linearity the illuminance/irradiance level should be variable without changing either the spectral or angular distribution of the beam. A realization of a set-up using a glass rod as homogenizer is shown. The achieved uniformity is better than +/- 2% over a 40 mm diameter area. The irradiance and illuminance are over 3 mW/cm2 and 20 klux respectively. Suitable choosing the lamp current the set-up produces the spectral distribution of a standard illuminant A recommended by CIE for the measurements of image sensors.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Miklos Racz and Janos P. Makai "Variable-intensity large-area illuminator for photodetectors and image sensors", Proc. SPIE 2022, Photodetectors and Power Meters, (15 October 1993);

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