Abstract

In order to avoid luminance flicker at equal luminance of two alternating colored stimuli de Lange found that a phase shift of the stimuli with respect to each other has to be introduced.

This compensation for the phase shift occurring in the retina–cortex system has been measured for a large number of wavelength combinations at a retinal illuminance of 2 trolands and a 2° field. The phase angles are approximately additive.

An analysis is given in terms of more basic phase shifts between the red and green systems according to the Young–Helmholtz theory.

A fixed phase-shift-vs-frequency relationship between these systems explains the phase shifts measured, although second-order nonlinear effects cause small distortions of this simple model.

© 1964 Optical Society of America

Visual Responses to Two Alternating Trains of High-Frequency Intermittent Stimuli*†

Tapas K. Sen
J. Opt. Soc. Am. 54(3) 386-393 (1964)

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

H. de Lange Dzn
J. Opt. Soc. Am. 48(11) 784-789 (1958)

Chromatic Flicker*

Gerard J. C. van der Horst
J. Opt. Soc. Am. 59(9) 1213-1217 (1969)

Colorimetry in Parafoveal Fields.* I. Color-Matching Functions

Isadore Nimeroff
J. Opt. Soc. Am. 54(6) 824-832 (1964)

Two-band model of heterochromatic flicker

D. H. Kelly and D. van Norren
J. Opt. Soc. Am. 67(8) 1081-1091 (1977)