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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 30, Iss. 11 — Nov. 1, 1940
  • pp: 568–571

A Photoelectric Color Temperature Meter for Incandescent Lamps

M. H. SWEET  »View Author Affiliations

JOSA, Vol. 30, Issue 11, pp. 568-571 (1940)

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A simple device for the measurement of the color temperature of incandescent lamps is described. Two vacuum photo-tubes are used in a balanced bridge circuit with an "electric eye" as an output indicator. No electronic amplification is used.

M. H. SWEET, "A Photoelectric Color Temperature Meter for Incandescent Lamps," J. Opt. Soc. Am. 30, 568-571 (1940)

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