Abstract

The design and construction of an experimental subjective color comparator is discussed. The unit permits binocular viewing of a constant, 2-degree split matching field with a dark surround. During observation of the field, continuous adjustments of the color of the “standard” side are possible with three controls, each associated with one of the subjective attributes of color. Data useful in calculating the I.C.I. tristimulus values for the matched sample appear on calibrated dials. Color samples to be matched by Illuminant “C” are inserted in the instrument on small cards. Larger samples—external to the comparator—such as textiles, agricultural products, wall panels, etc., can be evaluated for all types of illumination. In every case, texture in the sample is obscured by the comparator mechanism. Some data is presented to indicate the matching tolerances that can be expected.

© 1951 Optical Society of America

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References

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  1. A. C. Hardy, Handbook of Colorimetry (The Technology Press, Massachusetts Institute of Technology, Cambridge, 1936).
  2. Optical Society of America Colorimetry Committee, J. Opt. Soc. Am. 35, 1 (1945).
  3. D. B. Judd, Illum. Eng. 36, 336 (1941).
  4. D. B. Judd, J. Opt. Soc. Am. 23, 359 (1933).
    [Crossref]
  5. M. E. Bond and D. Nickerson, J. Opt. Soc. Am. 32, 709 (1942).
    [Crossref]
  6. D. R. Dohner and C. E. Foss, J. Opt. Soc. Am. 32, 702 (1942).
    [Crossref]
  7. D. Nickerson, J. Opt. Soc. Am. 21, 640 (1931).
    [Crossref]
  8. D. Nickerson, J. Opt. Soc. Am. 25, 253 (1935).
    [Crossref]
  9. H. P. Gage, J. Opt. Soc. Am. 23, 46 (1933).
    [Crossref]
  10. I. A. Balinkin, Am. J. Psychol. 52, 428 (1939).
    [Crossref]

1945 (1)

1942 (2)

1941 (1)

D. B. Judd, Illum. Eng. 36, 336 (1941).

1939 (1)

I. A. Balinkin, Am. J. Psychol. 52, 428 (1939).
[Crossref]

1935 (1)

1933 (2)

1931 (1)

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Figures (6)

Fig. 1
Fig. 1

The comparator from the operator’s side.

Fig. 2
Fig. 2

Optical system.

Fig. 3
Fig. 3

Internal view from the operator’s left showing the mirror drum, the card chamber, parts of the card mechanism, the illuminant housing, the stationary mirror, and the viewing slot.

Fig. 4
Fig. 4

The card chamber from opposite the viewing side, with panel opened and showing the field aperture and the card supports, the latter with their magnets.

Fig. 5
Fig. 5

Card positioning mechanism.

Fig. 6
Fig. 6

Indicating mechanism.