Research into the Dynamic Nature of the Human Fovea→Cortex Systems with Intermittent and Modulated Light II Phase Shift in Brightness and Delay in Color Perception

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.