Osaka N
J Opt Soc Am. 1978 Jan;68(1):140-2. doi: 10.1364/josa.68.000140.
Using a method of direct magnitude estimation, perceived brightness was measured in the dark-adapted eye with brief flashes of varying duration in the Bloch region (1-100 ms) and retinal lock (0 degrees-40 degrees) for the photopic luminance levels covering the range between 140 and 0.14 cd/m2 in steps of 1 log unit. Perceived brightness increased as a function of flash luminous energy (product of luminance and duration) up to critical duration of approximately 100 ms. The brightness power exponent for brief flash was found to be 0.48 +/- 0.01 in the fovea, whereas about 0.44 +/- 0.01 in the periphery.
采用直接量级估计法，在暗适应眼中，对于明视觉亮度水平在140至0.14 cd/m²范围内以1个对数单位的步长变化，在布洛赫区域（1 - 100毫秒）和视网膜锁定（0度 - 40度）内，用不同持续时间的短暂闪光测量感知亮度。在大约100毫秒的临界持续时间之前，感知亮度随闪光发光能量（亮度与持续时间的乘积）的增加而增加。发现中央凹处短暂闪光的亮度功率指数为0.48±0.01，而周边约为0.44±0.01。
