Mesopic luminous-efficiency functions.
Mesopic luminous-efficiency functions.
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中间视觉发光效率函数。
DOI：
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发表时间：
1981
影响因子：
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通讯作者：
H. Shimozono
中科院分区：
文献类型：
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作者：
M. Ikeda;H. Shimozono
为了建立标准观察者中间视觉的光效函数，用直接异色亮度匹配法测量了视网膜照度在-2-2log明视范围内的光效函数，以覆盖暗视、中间视和明视条件。中心凹呈现10度弧度的稳定视野。这些函数经历了通常的复杂变化，从接近V‘(波长)的杆状发光效率函数到具有宽且几乎是双峰形状的锥形函数。推导了表示中间视光效函数的简单公式，其中暗视和明视的对数敏感度乘以依赖于亮度水平的系数后线性相加。还得到了不同亮度水平下的饱和函数，并对其发光效率进行了研究。尽管亮度水平有很大的变化，但饱和函数基本保持不变，这表明在低视网膜照度下，色通道对亮度感觉的贡献保持不变。
In order to establish the luminous-efficiency function for mesopic vision of the standard observer, luminous efficiency functions were measured with the direct heterochromatic brightness-matching method at retinal illuminance in the range of -2-2 log photopic trolands in order to cover the scotopic, mesopic, and photopic conditions. A steady visual field of 10 degrees arc was presented foveally. The functions underwent the usual complicated change from a rod type of luminous-efficiency function close to V'(lambda) to a cone function that had a wide and almost double-peaked shape. A simple formula to represent the mesopic luminous-efficiency functions was derived in which log sensitivities of scotopic and photopic vision were linearly added after being multiplied by coefficients that were dependent on the luminance level. Saturation functions were also obtained at the various luminance levels for which luminous efficiency was investigated. In spite of a great variation of luminance level, the saturation function remained more or less the same, which indicates that the chromatic channels retain their contributions to the brightness sensation at low retinal illumination.