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

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)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1968
Accession Number
AD0669454

Entities

People

  • George K. C. Hardesty
  • T. O. Twist

Tags

DTIC Thesaurus Topics

  • Communication Equipment
  • Light Sources
  • Lighting Equipment
  • Luminance
  • Luminosity
  • Optical Phenomena
  • Optical Properties
  • Photometers
  • Photometry
  • Photoreceptors
  • Signal Lights
  • Spectral Energy Distribution
  • Standardization
  • White Light

Fields of Study

  • Physics

Readers

  • Spectroscopy.
  • Systems Analysis and Design
  • Vision Science/Vision Psychology/Cognitive Neuroscience.