Abstract

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.

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References

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  1. Campbell and Gardiner, "Photoelectric color matching," J. Sci. Inst. 2, 12 (1925); 4, 38 (1926).
  2. G. F. Hubing, "Portable photoelectric pyrometer," J. Opt. Soc. Am. 26, p. 260 (1936).
  3. Russell, Lucks and Turnbull: "A new two-color optical pyrometer," J. Opt. Soc. Am. 30/248 (1940).
  4. C. H. Sharp, "Apparatus for measuring the color temperature of incandescent lamp filaments," J. Opt. Soc. Am. 20, 62 (1930).

1940 (1)

1936 (1)

1930 (1)

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