ANGULAR DEPENDENCE OF SPECTRAL RESPONSIVITY OF A PHOTOMETER AND ITS EFFECT ON SPECTRAL MISMATCH CORRECTION

摘要

This work presents the angular dependence of spectral responsivity of an absorptive filterbased photometer by measuring its relative change at different incident angles. The effect of the angular dependence on photometric measurement is demonstrated by calculating spectral mismatch correction factors using the measured spectral responsivity for various light sources.