Abstract

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°–40°) 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.

© 1978 Optical Society of America

Exponent of the Broca–Sulzer flash duration as a function of retinal eccentricity

Naoyuki Osaka
J. Opt. Soc. Am. 72(1) 62-67 (1982)

Brightness function: Effect of area and duration

R. J. W. Mansfield
J. Opt. Soc. Am. 63(8) 913-920 (1973)

Luminance-brightness comparisons of LED alpha-numeric sources at suprathreshold levels

Robert L. Booker
J. Opt. Soc. Am. 68(7) 949-952 (1978)

Effect of Temporal Overlap on Brightness Matching of Adjacent Flashes*

David H. Raab and Eli Osman
J. Opt. Soc. Am. 52(10) 1174-1178 (1962)

Two-Flash Thresholds as a Function of Luminance in the Dark-Adapted Eye*

Mark F. Lewis
J. Opt. Soc. Am. 57(6) 814-815 (1967)