Accession Number : AD0669454

Title :   THE APPLICATION OF A COLOR-CORRECTION FACTOR IN THE PHOTOMETRY OF COLORED SIGNAL LIGHTS (A PROPOSED PROCEDURE),

Corporate Author : NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER ANNAPOLIS MD ANNAPOLIS DIV

Personal Author(s) : Hardesty,George K. C. ; Twist,T. O.

Report Date : MAY 1968

Pagination or Media Count : 39

Abstract : This note presents a proposed procedure for assessing errors and applying corrections in the photometry of colored signal lights and various other luminous visual displays. The procedure is primarily for use with the photomultiplier-telephotometer types of luminance measuring equipments in general use today. It is also suitable for the correction of barrier-layer-cell and other solid-state photoreceptor photometric equipment. The spectral response of the complete photometer (not merely the built-in filter and photomultiplier combination) is first determined. Should the overall response prove to be virtually that of the Commission Internationale de l'Eclairage luminosity function, then no 'color corrections' would be applied. Should the spectral response of the photometer system have significant departures from the Commission Internationale de l'Eclairage curve, then valid corrections require radiometric analysis of the spectral energy distribution of the colored light signal and of the 'white light' source used for standardization of the photometer. Appendix A describes a developmental 'Spectral Response Evaluator.' (Author)

Descriptors :   (*PHOTOMETERS, CORRECTIONS), COLORIMETRY, ILLUMINATION, DISPLAY SYSTEMS, RESPONSE, INDICATOR LIGHTS, COLORS, OPTICAL FILTERS, PHOTOMULTIPLIER TUBES, ANALYSIS, CALIBRATION, STANDARDS, RADIOMETERS

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE