A PHYSICAL COMPARATOR FOR THE COLOR TEMPERATURES OF INCANDESCENT LAMPS.

Abstract

An apparatus was assembled and used to evaluate the color temperatures of incandescent tungsten lamps by physical comparison techniques. A red-to violet ratio method of establishing the effective slope of the radiometric function is utilized. The apparatus uses a single 931-A photomultiplier to receive radiations from the 'standard' and 'unknown' lamps through red and violet filters sequentially. Resultant oscilloscope patterns are judged for equality. Accurate results can be obtained in a short period of time, thus permitting large quantities of lamps to be calibrated with a minimum of effort. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 15, 1951
Accession Number
AD0657618

Entities

People

  • A. E. Snider
  • E. J. King
  • F. Hamburger Jr

Organizations

  • Johns Hopkins University

Tags

DTIC Thesaurus Topics

  • Color Temperature
  • Comparators
  • Electromagnetic Radiation
  • Incandescent Lamps
  • Lamps
  • Light (Electromagnetic Radiation)
  • Optical Phenomena
  • Oscilloscopes
  • Radiation
  • Standards
  • Tungsten

Readers

  • Computational Modeling and Simulation
  • Spectroscopy.
  • Vision Science/Vision Psychology/Cognitive Neuroscience.