Color Temperature Scales for Tungsten and Carbon

Hyde, Emily; Cady, F. E.; Forsythe, W. E.

doi:10.1103/physrev.10.395

Cited by 7 publications

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“…(92, 207-215; 13, 1-10). Such a system (vide infra) is necessarily three-dimensional (61,(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31), and three ordinal values, representing the positions of a given color in the several dimensions are needed to define the color. The spectral chroma scale, considered more in detail below, is an application of this principle of color measurement to the study of the dependency of chromaticity upon wave-length.…”

Section: A Colorimetry Report 1920-21mentioning

confidence: 99%

“…Probably the illuminant whose characteristics are best established at the present time is the acetylene flame produced by a standard burner under specified conditions. The spectral distributions for vacuum tungsten electric lamps are determined by the efficiency, or lumens per watt, at which they are operated, and extensive measurements made at the Nela Research Laboratory (27)…”

Section: Standard Illuminants-allmentioning

confidence: 99%

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Report of Committee on Colorimetry for 1920–21

Troland¹

1922

J. Opt. Soc. Am.

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The Chairman of the Committee wishes to acknowledge his indebtedness to various members of his committee as follows: to Mr. Priest for a great mass of data, helpful criticisms and the suggestions drawn from his preliminary committee report of 1919 (not published, but copy may be borrowed from Bureau of Standards Library, Cf. J. Op. Soc., 4, p. 186; 1920); to Mr. Weaver for his elaborate computations of chromatic excitation values for many different classes of stimuli as well as for the development of the data upon which these computations were based; to Mr. Jones and to Dr. Ives for data and valuable criticisms.

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