Abstract
Recently, small unsaturation color lights have come into general use for signal lights owing to diffusion and development of LED and fluorescent substances. However, brightness of those lights has not been clarified in previous studies of Helmholtz-Kohlrausch effect. The influence of the condition that it is difficult to distinguish the color, such as a point light source and in peripheral visual field, is not sufficiently considered. Therefore, this study examined the influence of retinal eccentricity and color purity on B/L ratio for blinking point light sources. The results suggest that the B/L ratio differs from conventional data even in the fovea. They also show that a saturated blue light is superior as a signal light considering a retinal eccentricity.
