LUMINOSITY FUNCTIONS OBTAINED WITH DIFFERENT METHODS AND DIFFERENT VIEWING CONDITIONS

摘要

This report summarizes a series of measurements of the human luminosity function made with a variety of methods, and under a variety of viewing conditions. The luminosity function defines the effectiveness of various wavelengths of visible radiation in eliciting the brightness response.nMethodological variants which were studied include: (a) the method used to arrive at the brightness equation;(b) the number and spectral composition of the standard radiances used;(c) the configuration of the field of the photometric comparator;and (d) the use of direct heterochromatic comparison versus the use of flicker photometry. These variants in the method used to measure the luminosity function were shown to have little significant effect upon the shape of the luminosity function obtained.