20°周边视场光谱光视效率的实验研究

关于光谱光视效率在周边视场上的分布的研究目前国内外开展较少。基于异色闪烁光度法,以单色LED为光源搭建了测量人眼光谱光视效率函数空间分布特性的实验系统。在和CIE标准数据相同的实验条件下,测量了2°圆形视场和20°环形视场下几个波长点上的明视觉光谱光视效率值。结果发现,20°周边视场的V(λ)曲线与2°中央视场的曲线存在不同,在形状上更展宽,这反应了视网膜上三类不同锥体细胞的相对分布对V(λ)的影响。本文研究为后续测量整个视场上光谱光视效率函数的分布奠定了理论和实验基础。

Experimental Research on Spectral Luminous Efficiency Function for 20°Peripheral Vision

There are few researches on the spatial distribution of the spectral luminous efficiency function in the peripheral vision.In this paper,an experiment system for measuring the spatial distribution characteristics of the spectral luminous efficiency function is constructed based on the heterochromatic flicker photometry,with monochromatic LEDs as light sources.Under the same experimental conditions as the CIE standard,the values of the photopic spectral luminous efficiency at a few wavelengths in both the 2°circular visual field and the 20°annular visual field are measured.The results reveal that the curve of V(λ)in the 20°peripheral visual field is different from that of the 2°central visual field,which is broadened.This reflects the effect of relative distributions of the three cone photoreceptors on the retina.The work done in this paper establishes the theoretical and experimental basis for the further measurement of the spectral luminous efficiency function in the whole visual field.