Accession Number : AD0690711

Title :   OPTIMUM SIGNAL LUMINANCE FOR NORMAL AND PROTAN OBSERVERS,

Corporate Author : DEFENCE STANDARDS LABS MARIBYRNONG (AUSTRALIA)

Personal Author(s) : Clark,B. A. J.

Report Date : 20 MAY 1968

Pagination or Media Count : 1

Abstract : Cole and Brown found that observer reaction time to the presence of a red signal decreased as the signal luminance was increased to an optimum value, beyond which the reaction time was constant. Calculations indicate that for a given illuminant C background, the optimum signal luminance for protanomals is 1.02 times that for protanopes, although the luminosity curves used are based on scanty data. The intensity of in-service traffic signals is, near Melbourne at least, inadequate for protanopes and thus similarly so for the equally numerous protanomals. (Author)

Descriptors :   (*SIGNAL LIGHTS, *COLOR VISION), BRIGHTNESS, OPTIMIZATION, AUSTRALIA

Subject Categories : Civil Engineering
      Safety Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE