24 August 2010 Spectral response of photopic instruments with traceability to lamps
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Abstract
The spectral responsivity of detectors is commonly measured through the comparison with a reference detector and an optical system that provides monochromatic radiation. Such systems are designed to provide narrow bandwidth monochromatic radiation whose optical flux is generally low. These levels of optical flux are not enough to excite photopic instruments whose spectral response has to be measured. In this work we propose an optical arrangement with enough optical flux to realize such measurements. The system consists of a color temperature calibrated lamp which is the reference. The monochromatic separation is realized with a transmittance grating. The spectral distribution at the plane of the instrument is calculated, it is practically the same that the lamp except for the level of irradiance. The spectral response measured is corrected by the bandwidth of the system. Experimental results are presented and the noise-to-signal level reached in the system is discussed.
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J. G. Suarez-Romero, J. G. Suarez-Romero, R. Salas-Zuñiga, R. Salas-Zuñiga, J. B. Hurtado-Ramos, J. B. Hurtado-Ramos, } "Spectral response of photopic instruments with traceability to lamps", Proc. SPIE 7767, Instrumentation, Metrology, and Standards for Nanomanufacturing IV, 77670M (24 August 2010); doi: 10.1117/12.860898; https://doi.org/10.1117/12.860898
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