Abstract

In this paper it is shown that the well-known residual brightness flicker just above the color-flicker limit with heterochrome flicker photometery can be brought down to zero by introducing an external phase correction in one of two light beams sinusoidally modulated 100% in antiphase and simultaneously presented to the eye. The phase correction is found to be a function of luminance, color difference, and frequency.

From the attenuation characteristic of the color system it is found that the extra delay in color perception at 595 mμ is caused by a single integration process with a time constant of about 120 msec at high luminance; at low luminance a triple integration process occurs with the same time constant.

© 1958 Optical Society of America

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Brightness and Visual Acuity with Intermittent Illumination*

Jacob Nachmias
J. Opt. Soc. Am. 48(10) 726-730 (1958)

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