Abstract

Spectral sensitivity curves were determined at mesopic luminance levels, 0.1 and 0.01 ft-L, for a 2° field viewed foveally and parafoveally. These data are compared with similar curves for a 10° field, centrally fixated, whose area encompasses the smaller areas studied individually. The results show that, at 0.1 ft-L, differences between the 2° and 10° fields are similar to those between the CIE 2° and 10° photopic curves; furthermore the large field data can be predicted from the 2° data. At 0.01 ft-L however the spectral sensitivity is different from both CIE photopic and scotopic values at all positions and summation within the large field is complex.

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  1. P. G. Nutting, Bull. Natl. Bur. Std. (U. S.) 7, 235 (1910).
  2. L. L. Sloan, Psych. Mono. No. 173, 38, 1 (1928).
  3. H. V. Walters and W. D. Wright, Proc. Roy. Soc. (London) B131, 340 (1943).
  4. J. A. Kinney, J. Opt. Soc. Am. 45, 507 (1955).
  5. J. A. Kinney, J. Opt. Soc. Am. 48, 185 (1958).
  6. International Commission on Illumination, J. Opt. Soc. Am. 41, 734 (1951).
  7. CIE, Compt. Rend. Quatorzième Session, Bruxelles, June 1959, Volume A 95.
  8. Preprint of Progress Report, Comm E.1.4.1, CIE Vienna 1963.
  9. K. S. Weaver, J. Opt. Soc. Am. 39, 278 (1949).
  10. C. W. Bridgman, J. Opt. Soc. Am. 43, 733 (1953).
  11. Handbook of Experimental Psychology edited by S. S. Stevens, (John Wiley & Sons, Inc., New York, 1951), p. 819.
  12. A. Giorgi, J. Opt. Soc. Am. 53, 480 (1963).
  13. C. Landis, Physiol. Rev. 34, 259 (1954).
  14. W. A. Richards and S. M. Luria, "Color Mixture Functions at Low Luminance Levels" Vision Research (in press).
  15. D. L. MacAdam, J. Opt. Soc. Am. 40, 589 (1950).
  16. A. Dresler, Trans. Illum. Eng. Soc. (London) 18, 141 (1953).
  17. R. E. Harrington, J. Opt. Soc. Am. 44, 113 (1954).
  18. A. Cbapanis and R. M. Halsey, J. Opt. Soc. Am. 45, 1 (1955).
  19. C. L. Sanders and G. Wyszecki, J. Opt. Soc. Am. 47, 398 (1957).
  20. G. Wyszecki and C. L. Sanders, J. Opt. Soc. Am. 47, 840 (1957).
  21. See H. G. Sperling, Natl. Phys. Lab., G. Brit., Proc. Colour Symp. 251 (1958).
  22. The writer is indebted to J. Tisher for her help in the collection of data.
  23. The colored light from the interference filters did not always reach 100% purity. However, in the interests of clarity, the stimulus condition of colored light alone is arbitrarily defined as "100% purity" and the one-half color, one-half white condition as "50% purity."
  24. These data were obtained during the course of another experiment.14. The conditions were the same as described therein except that the spectral stimuli were flickered with an "off-white" standard set at 0.1 ft-
  25. D. L. MacAdam, J. Opt. Soc. Am. 44, 713 (1954).
  26. C. L. Sanders and G. Wyszecki, preprint of paper (P. 63.6) given at CIE, Vienna, Austria, June 1963.
  27. See Ref. 26, p. 8.
  28. W. S. Stiles, Proc. Roy. Soc. (London) B127, 64 (1939).
  29. F. J. J. Clarke, Opt. Acta 7, 355 (1960).

Bridgman, C. W.

C. W. Bridgman, J. Opt. Soc. Am. 43, 733 (1953).

Cbapanis, A.

A. Cbapanis and R. M. Halsey, J. Opt. Soc. Am. 45, 1 (1955).

Clarke, F. J. J.

F. J. J. Clarke, Opt. Acta 7, 355 (1960).

Dresler, A.

A. Dresler, Trans. Illum. Eng. Soc. (London) 18, 141 (1953).

Giorgi, A.

A. Giorgi, J. Opt. Soc. Am. 53, 480 (1963).

Halsey, R. M.

A. Cbapanis and R. M. Halsey, J. Opt. Soc. Am. 45, 1 (1955).

Harrington, R. E.

R. E. Harrington, J. Opt. Soc. Am. 44, 113 (1954).

Kinney, J. A.

J. A. Kinney, J. Opt. Soc. Am. 45, 507 (1955).

J. A. Kinney, J. Opt. Soc. Am. 48, 185 (1958).

Landis, C.

C. Landis, Physiol. Rev. 34, 259 (1954).

Luria, S. M.

W. A. Richards and S. M. Luria, "Color Mixture Functions at Low Luminance Levels" Vision Research (in press).

MacAdam, D. L.

D. L. MacAdam, J. Opt. Soc. Am. 40, 589 (1950).

D. L. MacAdam, J. Opt. Soc. Am. 44, 713 (1954).

Nutting, P. G.

P. G. Nutting, Bull. Natl. Bur. Std. (U. S.) 7, 235 (1910).

Richards, W. A.

W. A. Richards and S. M. Luria, "Color Mixture Functions at Low Luminance Levels" Vision Research (in press).

Sanders, C. L.

C. L. Sanders and G. Wyszecki, J. Opt. Soc. Am. 47, 398 (1957).

C. L. Sanders and G. Wyszecki, preprint of paper (P. 63.6) given at CIE, Vienna, Austria, June 1963.

G. Wyszecki and C. L. Sanders, J. Opt. Soc. Am. 47, 840 (1957).

Sloan, L. L.

L. L. Sloan, Psych. Mono. No. 173, 38, 1 (1928).

Sperling, H. G.

See H. G. Sperling, Natl. Phys. Lab., G. Brit., Proc. Colour Symp. 251 (1958).

Stiles, W. S.

W. S. Stiles, Proc. Roy. Soc. (London) B127, 64 (1939).

Tisher, J.

The writer is indebted to J. Tisher for her help in the collection of data.

Walters, H. V.

H. V. Walters and W. D. Wright, Proc. Roy. Soc. (London) B131, 340 (1943).

Weaver, K. S.

K. S. Weaver, J. Opt. Soc. Am. 39, 278 (1949).

Wright, W. D.

H. V. Walters and W. D. Wright, Proc. Roy. Soc. (London) B131, 340 (1943).

Wyszecki, G.

C. L. Sanders and G. Wyszecki, J. Opt. Soc. Am. 47, 398 (1957).

G. Wyszecki and C. L. Sanders, J. Opt. Soc. Am. 47, 840 (1957).

C. L. Sanders and G. Wyszecki, preprint of paper (P. 63.6) given at CIE, Vienna, Austria, June 1963.

Other (29)

P. G. Nutting, Bull. Natl. Bur. Std. (U. S.) 7, 235 (1910).

L. L. Sloan, Psych. Mono. No. 173, 38, 1 (1928).

H. V. Walters and W. D. Wright, Proc. Roy. Soc. (London) B131, 340 (1943).

J. A. Kinney, J. Opt. Soc. Am. 45, 507 (1955).

J. A. Kinney, J. Opt. Soc. Am. 48, 185 (1958).

International Commission on Illumination, J. Opt. Soc. Am. 41, 734 (1951).

CIE, Compt. Rend. Quatorzième Session, Bruxelles, June 1959, Volume A 95.

Preprint of Progress Report, Comm E.1.4.1, CIE Vienna 1963.

K. S. Weaver, J. Opt. Soc. Am. 39, 278 (1949).

C. W. Bridgman, J. Opt. Soc. Am. 43, 733 (1953).

Handbook of Experimental Psychology edited by S. S. Stevens, (John Wiley & Sons, Inc., New York, 1951), p. 819.

A. Giorgi, J. Opt. Soc. Am. 53, 480 (1963).

C. Landis, Physiol. Rev. 34, 259 (1954).

W. A. Richards and S. M. Luria, "Color Mixture Functions at Low Luminance Levels" Vision Research (in press).

D. L. MacAdam, J. Opt. Soc. Am. 40, 589 (1950).

A. Dresler, Trans. Illum. Eng. Soc. (London) 18, 141 (1953).

R. E. Harrington, J. Opt. Soc. Am. 44, 113 (1954).

A. Cbapanis and R. M. Halsey, J. Opt. Soc. Am. 45, 1 (1955).

C. L. Sanders and G. Wyszecki, J. Opt. Soc. Am. 47, 398 (1957).

G. Wyszecki and C. L. Sanders, J. Opt. Soc. Am. 47, 840 (1957).

See H. G. Sperling, Natl. Phys. Lab., G. Brit., Proc. Colour Symp. 251 (1958).

The writer is indebted to J. Tisher for her help in the collection of data.

The colored light from the interference filters did not always reach 100% purity. However, in the interests of clarity, the stimulus condition of colored light alone is arbitrarily defined as "100% purity" and the one-half color, one-half white condition as "50% purity."

These data were obtained during the course of another experiment.14. The conditions were the same as described therein except that the spectral stimuli were flickered with an "off-white" standard set at 0.1 ft-

D. L. MacAdam, J. Opt. Soc. Am. 44, 713 (1954).

C. L. Sanders and G. Wyszecki, preprint of paper (P. 63.6) given at CIE, Vienna, Austria, June 1963.

See Ref. 26, p. 8.

W. S. Stiles, Proc. Roy. Soc. (London) B127, 64 (1939).

F. J. J. Clarke, Opt. Acta 7, 355 (1960).

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