Abstract

A set of curves and two empirical formulas have been derived which represent the contrast sensitivity of the human eye when both the test-object and the test-field luminances are considerably lower than the adaptation level. Although derived to be used for the lighting of traffic tunnels, the data may be applied to a much wider range of visibility problems, as the results are not greatly dependent on changes in the experimental conditions.

© 1965 Optical Society of America

Contrast Sensitivity of the Human Eye for Square-Wave Gratings

H. A. W. Schober and R. Hilz
J. Opt. Soc. Am. 55(9) 1086-1091 (1965)

Flicker Sensitivity and Apparent Brightness as a Function of Surround Luminance*

Lewis O. Harvey
J. Opt. Soc. Am. 60(6) 860-864 (1970)

Theory and Experiments Concerning the Heterochromatic Threshold-Reduction Factor (HTRF)*

Robert M. Boynton, Horst Scheibner, Terry Yates, and Edward Rinalducci
J. Opt. Soc. Am. 55(12) 1672-1685 (1965)

Brightness-Contrast Effects Among Several Points of Light*

James P. Thomas
J. Opt. Soc. Am. 55(3) 323-327 (1965)

Measurement of Color Appearance

R. W. G. Hunt
J. Opt. Soc. Am. 55(11) 1540-1551 (1965)