Using color substitution pupil response to expose chromatic mechanisms.
Using color substitution pupil response to expose chromatic mechanisms.
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使用颜色替换瞳孔响应来揭示色彩机制。
DOI：
10.1364/josa.69.001029
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发表时间：
1979
影响因子：
--
通讯作者：
G. Cohen
中科院分区：
文献类型：
--
作者：
V. Saini;G. Cohen
众所周知，瞳孔阈值显示一个暗谱行为，甚至对中央凹刺激。然而，当两个不同波长的局部平衡视场交替时，瞳孔在每次过渡时都表现出收缩反应，从而暴露出色光机制的神经支配。使用合适的瞳孔神经支配模型，系统地研究了不同波长和辐射功率水平下的这种替代反应，以产生（在模型假设的精度范围内）瞳孔所指示的色度机制的光谱阈值曲线。因此，已经确定了四种机制，其峰值灵敏度在450、525、580和495 nm附近。我们认为这些代表了在外侧膝状体水平之前维持的蓝色、绿色、红色和暗色机制。
It is well known that pupillary threshold shows a scotopic spectral behavior, even for foveal stimuli. However, when two scotopically balanced fields at different wavelengths are alternated, the pupil shows a constriction response at each transition, exposing innervation from chromatic mechanisms. Using a suitable model for pupillary innervation, this substitution response is systematically studied for different wavelengths and radiant power levels to yield (within the accuracy of the assumptions of the model) spectral threshold curves for the chromatic mechanism as indicated by the pupil. Four mechanisms have thus been identified, having peak sensitivities near 450, 525, 580, and 495 nm. We propose that these represent the blue, green, red and scotopic mechanisms as maintained before the level of the lateral geniculate body.