Abstract

A color saturation threshold meter has been designed in which a gradually changeable mixture of white and colored light is produced. The variability of the mixture is produced by means of double refraction. A ray of white light is split into two beams; one traversing a color filter. The two rays are then reunited so that a homogeneous mixture of white and colored light is obtained. Polarization of the two rays involved permits a measurable change in the ratio of luminances of both lights between limits of zero and infinity. The instrument works satisfactorily in its present state. Yet, it could be rendered more useful by the following two devices which can easily be installed: (1) Instead of colored filters, interference filters producing an approach to spectrally homogeneous light can be installed. (2) Application of neutral density filters of proper dimensions would provide constancy of the mixture’s luminance throughout the measuring range; a condition which is only approximated for a limited range in the present instrument.

© 1950 Optical Society of America

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References

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  1. S. V. Kravkov, Acta Ophthalm. Kobenhavn 17, 89 (1939).
    [Crossref]
  2. H. Meister, Zeits. f. Sinnesphysiol. 65, 217 (1934).
  3. J. G. Priest and F. L. Brickwedde, J. Opt. Soc. Am. 28, 133 (1938).
    [Crossref]
  4. W. F. Grether, J. Exper. Psychol. 28, 419 (1941).
    [Crossref]
  5. A. Chapanis, J. Exper. Psychol. 34, 24 (1944).
    [Crossref]
  6. C. H. Graham and N. R. Bartlett, J. Exper. Psychol. 24, 574 (1939).
    [Crossref]
  7. W. D. Wright, Researches on Normal and Defective Color Vision (C. V. Mosby Company, St. Louis, Missouri, 1947), p. 161.
  8. C. F. K. Graff, Grundriss der Astropizysik (B. G. Teubner, Leipzig, Berlin, 1928), p. 221.
  9. A. Dresler, Licht 3, 41 (1933).

1944 (1)

A. Chapanis, J. Exper. Psychol. 34, 24 (1944).
[Crossref]

1941 (1)

W. F. Grether, J. Exper. Psychol. 28, 419 (1941).
[Crossref]

1939 (2)

C. H. Graham and N. R. Bartlett, J. Exper. Psychol. 24, 574 (1939).
[Crossref]

S. V. Kravkov, Acta Ophthalm. Kobenhavn 17, 89 (1939).
[Crossref]

1938 (1)

1934 (1)

H. Meister, Zeits. f. Sinnesphysiol. 65, 217 (1934).

1933 (1)

A. Dresler, Licht 3, 41 (1933).

Bartlett, N. R.

C. H. Graham and N. R. Bartlett, J. Exper. Psychol. 24, 574 (1939).
[Crossref]

Brickwedde, F. L.

Chapanis, A.

A. Chapanis, J. Exper. Psychol. 34, 24 (1944).
[Crossref]

Dresler, A.

A. Dresler, Licht 3, 41 (1933).

Graff, C. F. K.

C. F. K. Graff, Grundriss der Astropizysik (B. G. Teubner, Leipzig, Berlin, 1928), p. 221.

Graham, C. H.

C. H. Graham and N. R. Bartlett, J. Exper. Psychol. 24, 574 (1939).
[Crossref]

Grether, W. F.

W. F. Grether, J. Exper. Psychol. 28, 419 (1941).
[Crossref]

Kravkov, S. V.

S. V. Kravkov, Acta Ophthalm. Kobenhavn 17, 89 (1939).
[Crossref]

Meister, H.

H. Meister, Zeits. f. Sinnesphysiol. 65, 217 (1934).

Priest, J. G.

Wright, W. D.

W. D. Wright, Researches on Normal and Defective Color Vision (C. V. Mosby Company, St. Louis, Missouri, 1947), p. 161.

Acta Ophthalm. Kobenhavn (1)

S. V. Kravkov, Acta Ophthalm. Kobenhavn 17, 89 (1939).
[Crossref]

J. Exper. Psychol. (3)

W. F. Grether, J. Exper. Psychol. 28, 419 (1941).
[Crossref]

A. Chapanis, J. Exper. Psychol. 34, 24 (1944).
[Crossref]

C. H. Graham and N. R. Bartlett, J. Exper. Psychol. 24, 574 (1939).
[Crossref]

J. Opt. Soc. Am. (1)

Licht (1)

A. Dresler, Licht 3, 41 (1933).

Zeits. f. Sinnesphysiol. (1)

H. Meister, Zeits. f. Sinnesphysiol. 65, 217 (1934).

Other (2)

W. D. Wright, Researches on Normal and Defective Color Vision (C. V. Mosby Company, St. Louis, Missouri, 1947), p. 161.

C. F. K. Graff, Grundriss der Astropizysik (B. G. Teubner, Leipzig, Berlin, 1928), p. 221.

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Figures (2)

Fig. 1
Fig. 1

Functional sketch of the color saturation threshold meter.

Fig. 2
Fig. 2

The quantity pB=Bc/[Bw+Bc] (with Bw and Bc as the luminances of the white and the colored light, respectively) as a function of the angle indicating the position of the Nicol prism.

Equations (7)

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

R = cos 2 φ / T c · sin 2 φ = ( 1 / T c ) · cot 2 φ ,
B = c · [ cos 2 φ + T c · sin 2 φ ] ,
B = c · [ cos 2 φ + sin 2 φ ] .
B = c · cos 2 φ .
B = c · sin 2 φ .
p B = B c / [ B w + B c ] ,
p b = T c · sin 2 φ / [ cos 2 φ + T c · sin 2 φ ] .