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References

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  1. G. Priest, “A Proposed Scale for Use in Specifying the Chromaticity of Incandescent Illuminants and Various Phases of Daylight,” J. O. S. A. 23, 41 (1933).
    [CrossRef]
  2. D. B. Judd, “The 1931 I. C. I. Standard Observer and Coordinate System for Colorimetry,” J. O. S. A. 23, 359 (1933).
    [CrossRef]
  3. D. B. Judd, “Estimation of Chromaticity Differences and Nearest Color Temperature on the Standard 1931 I. C. I. Colorimetric Coordinate System,” J. O. S. A. 26, 421 (1936).
    [CrossRef]
  4. H. P. Gage, “Color Filters for Altering Color Temperature. Pyrometer Absorption and Daylite Glasses,” J. O. S. A. 23, 46 (1933).
    [CrossRef]
  5. Frehafer and Snow, “Tables and Graphs for Facilitating the Computation of Spectral Energy Distribution by Planck’s Formula,” Nat. Bur. Stand. Misc. Pub. No. 56, 1925.
  6. H. P. Gage and Norman Macbeth, “Filters for Artificial Daylighting, Their Grading and Use,” Trans. I. E. S. 31, 995 (1936).

1936 (2)

D. B. Judd, “Estimation of Chromaticity Differences and Nearest Color Temperature on the Standard 1931 I. C. I. Colorimetric Coordinate System,” J. O. S. A. 26, 421 (1936).
[CrossRef]

H. P. Gage and Norman Macbeth, “Filters for Artificial Daylighting, Their Grading and Use,” Trans. I. E. S. 31, 995 (1936).

1933 (3)

H. P. Gage, “Color Filters for Altering Color Temperature. Pyrometer Absorption and Daylite Glasses,” J. O. S. A. 23, 46 (1933).
[CrossRef]

G. Priest, “A Proposed Scale for Use in Specifying the Chromaticity of Incandescent Illuminants and Various Phases of Daylight,” J. O. S. A. 23, 41 (1933).
[CrossRef]

D. B. Judd, “The 1931 I. C. I. Standard Observer and Coordinate System for Colorimetry,” J. O. S. A. 23, 359 (1933).
[CrossRef]

1925 (1)

Frehafer and Snow, “Tables and Graphs for Facilitating the Computation of Spectral Energy Distribution by Planck’s Formula,” Nat. Bur. Stand. Misc. Pub. No. 56, 1925.

Frehafer,

Frehafer and Snow, “Tables and Graphs for Facilitating the Computation of Spectral Energy Distribution by Planck’s Formula,” Nat. Bur. Stand. Misc. Pub. No. 56, 1925.

Gage, H. P.

H. P. Gage and Norman Macbeth, “Filters for Artificial Daylighting, Their Grading and Use,” Trans. I. E. S. 31, 995 (1936).

H. P. Gage, “Color Filters for Altering Color Temperature. Pyrometer Absorption and Daylite Glasses,” J. O. S. A. 23, 46 (1933).
[CrossRef]

Judd, D. B.

D. B. Judd, “Estimation of Chromaticity Differences and Nearest Color Temperature on the Standard 1931 I. C. I. Colorimetric Coordinate System,” J. O. S. A. 26, 421 (1936).
[CrossRef]

D. B. Judd, “The 1931 I. C. I. Standard Observer and Coordinate System for Colorimetry,” J. O. S. A. 23, 359 (1933).
[CrossRef]

Macbeth, Norman

H. P. Gage and Norman Macbeth, “Filters for Artificial Daylighting, Their Grading and Use,” Trans. I. E. S. 31, 995 (1936).

Priest, G.

G. Priest, “A Proposed Scale for Use in Specifying the Chromaticity of Incandescent Illuminants and Various Phases of Daylight,” J. O. S. A. 23, 41 (1933).
[CrossRef]

Snow,

Frehafer and Snow, “Tables and Graphs for Facilitating the Computation of Spectral Energy Distribution by Planck’s Formula,” Nat. Bur. Stand. Misc. Pub. No. 56, 1925.

J. O. S. A. (4)

G. Priest, “A Proposed Scale for Use in Specifying the Chromaticity of Incandescent Illuminants and Various Phases of Daylight,” J. O. S. A. 23, 41 (1933).
[CrossRef]

D. B. Judd, “The 1931 I. C. I. Standard Observer and Coordinate System for Colorimetry,” J. O. S. A. 23, 359 (1933).
[CrossRef]

D. B. Judd, “Estimation of Chromaticity Differences and Nearest Color Temperature on the Standard 1931 I. C. I. Colorimetric Coordinate System,” J. O. S. A. 26, 421 (1936).
[CrossRef]

H. P. Gage, “Color Filters for Altering Color Temperature. Pyrometer Absorption and Daylite Glasses,” J. O. S. A. 23, 46 (1933).
[CrossRef]

Nat. Bur. Stand. Misc. Pub. No. 56 (1)

Frehafer and Snow, “Tables and Graphs for Facilitating the Computation of Spectral Energy Distribution by Planck’s Formula,” Nat. Bur. Stand. Misc. Pub. No. 56, 1925.

Trans. I. E. S. (1)

H. P. Gage and Norman Macbeth, “Filters for Artificial Daylighting, Their Grading and Use,” Trans. I. E. S. 31, 995 (1936).

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Figures (2)

Fig. 1
Fig. 1

Mixture diagram showing Wien and Planck temperature colors; x and y are two of the unified tristimulus coefficients.

Fig. 2
Fig. 2

Correlation of Planck and Wien color temperatures.

Tables (2)

Tables Icon

Table I Ratio of values of Wien to Planck formula spectral energies for a range of λθ.

Tables Icon

Table II Correlation of Wien and Planck color temperatures.

Equations (3)

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E λ C 1 λ - 5 ( e C 2 / λ θ - 1 ) - 1
and             E λ C 1 λ - 5 ( e C 2 / λ θ ) - 1
( E λ ) w / ( E λ ) p = ( e C 2 / λ θ - 1 ) / e C 2 / λ θ .