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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 42, Iss. 3 — Mar. 1, 1952
  • pp: 178–181

A Physical Comparator for the Color Temperatures of Incandescent Lamps

E. J. KING, A. E. SNIDER, and F. HAMBURGER, JR.  »View Author Affiliations


JOSA, Vol. 42, Issue 3, pp. 178-181 (1952)
http://dx.doi.org/10.1364/JOSA.42.000178


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Abstract

An apparatus has been assembled and is presently being 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.

Citation
E. J. KING, A. E. SNIDER, and F. HAMBURGER, JR., "A Physical Comparator for the Color Temperatures of Incandescent Lamps," J. Opt. Soc. Am. 42, 178-181 (1952)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-42-3-178

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