Rovamo J, Koljonen T, Näsänen R
Department of Vision Sciences, University of Aston, Birmingham, U.K.
Vision Res. 1996 Sep;36(17):2675-80. doi: 10.1016/0042-6989(96)00028-4.
Using an 8 mm pupil, 2AFC-method, and 2 x 2 deg2 grating at 2 c/deg we measured contrast sensitivity as a function of integrated radiance for a series of interference filters with peak wavelengths at 400-700 nm. Irrespective of the radiance level, contrast sensitivity was highest when wavelength was at and around 550 nm. It decreased towards longer and shorter wavelengths, reflecting the variation of the probability of quantal catch with light wavelength. When contrast sensitivity functions plotted in double logarithmic coordinates were shifted horizontally by multiplying the integrated radiances of each filter by an appropriate scaling factor, the functions superimposed onto a single curve. Contrast sensitivity at lower levels of relative radiance (R) increased in proportion to square root of R, obeying DeVries-Rose law, but at higher levels contrast sensitivity was constant, obeying Weber's law. Scaling factors plotted as a function of wavelength provided an estimate of V(lambda) quite similar to the standard 2 deg photopic spectral-luminosity function of CIE 1924.
我们使用8毫米瞳孔、2AFC方法以及在2 c/deg下的2×2度²光栅，测量了一系列峰值波长在400 - 700纳米的干涉滤光片的对比敏感度随积分辐射率的变化。无论辐射率水平如何，当波长在550纳米及附近时，对比敏感度最高。它向更长和更短波长方向降低，反映了光量子捕获概率随光波长的变化。当通过将每个滤光片的积分辐射率乘以适当的比例因子在双对数坐标中绘制对比敏感度函数并水平移动时，这些函数会叠加到一条曲线上。在较低相对辐射率（R）水平下，对比敏感度与R的平方根成正比增加，遵循德弗里斯 - 罗斯定律，但在较高水平下对比敏感度是恒定的，遵循韦伯定律。作为波长函数绘制的比例因子提供了与CIE 1924标准2度明视觉光谱 - 光度函数非常相似的V(λ)估计值。
