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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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References

  1. W. E. K. Middleton and A. R. Ramsey, Can. J. Research 26, Sec. A, 23–28 (1948–1949).
  2. J. F. Preston, Proc. Phys. Soc. (London) 17, 1012 (1935).
  3. C. H. Sharp, J. Opt. Soc. Am. 20, 62–70 (1930).
  4. G. T. Winch, J. Sci. Instr. 6, 374–379 (1929).
  5. F. Hamburger, Jr., and E. J. King, J. Opt. Soc. Am. 38, 875–879 (1948).

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