Stabell B, Stabell U
Department of Psychology, University of Oslo, Norway.
Vision Res. 1996 Nov;36(21):3407-14. doi: 10.1016/0042-6989(96)00079-x.
Chromaticities of monochromatic lights from different parts of the spectrum were measured both during the cone-plateau period of the long-term dark-adaptation curve and in a completely dark-adapted state. The measurements were obtained at 3, 8, 30 and 65 deg in the temporal field of view and at 1, 2, 3 and 4 log units above the cone-plateau level. The results show that cone-mediated colours obtained during the cone-plateau period in general are desaturated when rod signals intrude during long-term dark adaptation. The desaturation effect of rods obtained at high mesopic illumination levels was found to increase when the test field was moved from 3 to 30 deg but to reduce markedly between 30 and 65 deg. Surprisingly, the desaturation was clearly observable even at a retinal illumination of 20,000 ph td. The desaturation effect of rods is explained by the suggestion that differences in ongoing activity rates of the different types of spectrally opponent cells become levelled out to some extent when light signals from rods intrude during dark adaptation.
在长期暗适应曲线的视锥细胞平台期以及完全暗适应状态下，均测量了来自光谱不同部分的单色光的色度。测量是在颞侧视野的3°、8°、30°和65°处，以及高于视锥细胞平台水平1、2、3和4对数单位的情况下进行的。结果表明，在长期暗适应过程中，当视杆细胞信号侵入时，视锥细胞介导的颜色在视锥细胞平台期通常会不饱和。发现在中明照明水平较高时获得的视杆细胞的去饱和效应，在测试视野从3°移动到30°时会增加，但在30°到65°之间会明显降低。令人惊讶的是，即使在视网膜照度为20,000 ph td时，去饱和现象也清晰可见。视杆细胞的去饱和效应可以这样解释：当来自视杆细胞的光信号在暗适应过程中侵入时，不同类型光谱拮抗细胞的持续活动率差异在一定程度上趋于平稳。
