Abstract

Reflectances and colors are given for various natural woods. The results are summarized in a table, which gives the coefficients for empirical equations that fit all the spectral reflectance curves, and a second table which gives integrated values obtained by the analytic method. Clear varnish is found to reduce reflectance to approximately 85 percent of that for the unvarnished wood.

© 1948 Optical Society of America

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References

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  1. Parry Moon and D. E. Spencer, Lighting Design (Addison-Wesley Press, Cambridge, Massachusetts, 1948); “Light distributions in rooms,” J. Frank. Inst. 242, 111 (1946); “Lighting design by the interflection method,” J. Frank. Inst. 242, 465 (1946); “A simple criterion for quality in lighting,” Illum. Eng. 42, 325 (1947).
    [CrossRef] [PubMed]
  2. Parry Moon, “Optical reflection factors of acoustical materials,” J. Opt. Soc. Am. 31, 317 (1941); “Colors of ceramic tiles,” J. Opt. Soc. Am. 31, 482 (1941); “Wall materials and lighting,”  31, 723 (1941); “Reflection factors of floor materials,” J. Opt. Soc. Am. 32, 238 (1942); “Reflection factors of some materials used in school rooms,” J. Opt. Soc. Am. 32, 243 (1942); “Colors of furniture,” J. Opt. Soc. Am. 32, 293 (1942).
    [CrossRef]
  3. We wish to acknowledge the assistance of the Color Measurements Laboratory of the Massachusetts Institute of Technology and to thank the staff, whose kindness made possible this investigation.
  4. Parry Moon and D. E. Spencer, “Polynomial representation of reflectance curves,” J. Opt. Soc. Am. 35, 597 (1945).
    [CrossRef]
  5. Parry Moon and D. E. Spencer, “Analytical representation of trichromatic data,” J. Opt. Soc. Am. 35, 399 (1945); “Analytic expressions in photometry and colorimetry,” J. Math. Phys. 25, 111 (1946).
    [CrossRef]
  6. Parry Moon and D. E. Spencer, Lighting Design (Addison-Wesley Press, Cambridge, Massachusetts, 1948).

1945 (2)

1941 (1)

Moon, Parry

Spencer, D. E.

Parry Moon and D. E. Spencer, “Analytical representation of trichromatic data,” J. Opt. Soc. Am. 35, 399 (1945); “Analytic expressions in photometry and colorimetry,” J. Math. Phys. 25, 111 (1946).
[CrossRef]

Parry Moon and D. E. Spencer, “Polynomial representation of reflectance curves,” J. Opt. Soc. Am. 35, 597 (1945).
[CrossRef]

Parry Moon and D. E. Spencer, Lighting Design (Addison-Wesley Press, Cambridge, Massachusetts, 1948).

Parry Moon and D. E. Spencer, Lighting Design (Addison-Wesley Press, Cambridge, Massachusetts, 1948); “Light distributions in rooms,” J. Frank. Inst. 242, 111 (1946); “Lighting design by the interflection method,” J. Frank. Inst. 242, 465 (1946); “A simple criterion for quality in lighting,” Illum. Eng. 42, 325 (1947).
[CrossRef] [PubMed]

J. Opt. Soc. Am. (3)

Other (3)

Parry Moon and D. E. Spencer, Lighting Design (Addison-Wesley Press, Cambridge, Massachusetts, 1948).

We wish to acknowledge the assistance of the Color Measurements Laboratory of the Massachusetts Institute of Technology and to thank the staff, whose kindness made possible this investigation.

Parry Moon and D. E. Spencer, Lighting Design (Addison-Wesley Press, Cambridge, Massachusetts, 1948); “Light distributions in rooms,” J. Frank. Inst. 242, 111 (1946); “Lighting design by the interflection method,” J. Frank. Inst. 242, 465 (1946); “A simple criterion for quality in lighting,” Illum. Eng. 42, 325 (1947).
[CrossRef] [PubMed]

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Figures (6)

Fig. 1
Fig. 1

Spectral reflectance curves for unvarnished woods: A—Faux satine; B—Mahogany; C—Brazilian rosewood; — Experimental curve; - - - Analytic approximation.

Fig. 2
Fig. 2

Spectral reflectance curve for plain maple (unstained and unvarnished): — Experimental curve; - - - Analytic approximation.

Fig. 3
Fig. 3

Spectral reflectance curve for white harewood (unstained and unvarnished).

Fig. 4
Fig. 4

Colors of 35 unvarnished woods illuminated by 2842° Planckian radiation. The numbers refer to the samples arranged in order of reflectance (Table I). The curve is the Planckian locus.

Fig. 5
Fig. 5

Colors of the same woods, 7000° Planckian radiation.

Fig. 6
Fig. 6

Effect of varnish: A Gray hare wood, no varnish; B Same material, varnished.

Tables (1)

Tables Icon

Table II Reflectance and color of unvarnished wood.

Equations (3)

Equations on this page are rendered with MathJax. Learn more.

ρ = K 0 + K 1 λ + K 2 λ 2 .
ρ = K 0 + K 1 λ .
ρ = K - 1 / λ + K 0 .