EFFECT OF CHROMATIC ABERRATION ON VISUAL ACUITTY
EFFECT OF CHROMATIC ABERRATION ON VISUAL ACUITTY
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DOI：
10.1113/jphysiol.1967.sp008304
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发表时间：
1967-01-01
影响因子：
5.5
通讯作者：
GUBISCH, RW
中科院分区：
文献类型：
--
作者：
CAMPBELL, FW;GUBISCH, RW
1.从光学理论出发，预测了光栅视敏度靶在单色光和白色光下阈值对比度的差异。最大的差异，高达65%，预测光栅的对比度和间距比那些通常用于测量视力。使用三名受试者，我们使用钨灯和波长为546和578 mm的钨灯，测量了直径为1.5和2.5 mm的人工瞳孔在自然和麻痹调节下的对比度阈值。预测值与实测值的差异非常吻合.结果证实，观察到的敏锐度和灵敏度之间的差异白色和单色光主要是光学的起源，但涉及至少两个独立的颜色机制作为光谱加权函数。Stiles的π 4和π 5灵敏度比C.I.E.可见度曲线更适合观测到的差异。
1. Differences of threshold contrast are predicted from optical theory for a grating acuity target in monochromatic and white light. The greatest differences, up to 65%, are predicted for gratings of lower contrast and pitch than those normally used in measurements of visual acuity.2. Using three subjects, we measured contrast thresholds with 1·5 and 2·5 mm diameter artificial pupils for natural and paralysed accommodation, using a tungsten lamp and wave‐lengths of 546 and 578 mm.3. Excellent agreement is obtained between predicted and measured differences.4. Results confirm that observed acuity and sensitivity differences between white and monochromatic lights are largely optical in origin, but involve at least two independent colour mechanisms as spectral weighting functions. Stiles's π4and π5sensitivities afford a much better fit to observed differences than the C.I.E. visibility curve.