Abstract

Spectral sensitivity curves were established for three intensity levels above scotopic threshold with a twodegree field placed ten degrees from fixation against a dark surround. These curves were compared with the minimum scotopic luminosity curve determined for the same retinal position for each observer. The results showed that (1) there is a range of intensities over which relative spectral sensitivity does not change appreciably from the scotopic luminosity function, (2) there are irregularities in these mesopic curves which may be attributed to cone activity, and (3) the first change in spectral sensitivity with increased intensity is found in the long-wavelength half of the spectrum.

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  1. International Commission on Illumination, J. Opt. Soc. Am. 41, 734 (1951).
  2. Y. Hsia and C. H. Graham, Proc. Natl. Acad. Sci. 38, 80 (1952); L. M. Hurvich and D. Jameson, J. Opt. Soc. Am. 43, 485 (1953); L. C. Thomson, Proc. Phys. Soc. (London) B62, 787 (1949).
  3. P. G. Nutting, Bull. Bur. Standards 7, 235 (1910).
  4. L. L. Sloan, Psych. Mono. No. 173 38, 1 (1928).
  5. H. V. Walters and W. D. Wright, Proc. Roy. Soc. (London) B131, 340 (1943).
  6. K. S. Weaver, J. Opt. Soc. Am. 27, 36 (1937).
  7. See reference 5, p. 353.
  8. C. W. Bridgman, J. Opt. Soc. Am. 42, 832 (1952); 44, 394 (1954).
  9. C. W. Bridgman, J. Opt. Soc. Am. 43, 733 (1953).
  10. J. Smith and F. L. Dimmick, Medical Research Laboratory Report No. 174, 10, 56 (1951).
  11. F. L. Dimmick, Textile Colorist and Converter 67, 114 (1945).
  12. D. Farnsworth, J. Opt. Soc. Am. 33, 568 (1943).
  13. W . S. Stiles, Ned. Tijdschr. Natuurk. 15, 125 (1949); G. Wald, Science 101, 653 (1945); B. H. Crawford, Proc. Phys. Soc. (London) B62, 321 (1949).
  14. See reference 4, p. 82.
  15. L. S. MacMartin and F. L. Dimmick, Medical Research Laboratory Report No. 150, 8, 94 (1949).
  16. S. Hecht and R. E. Williams, J. Gen. Physiol. 5, 1 (1922).
  17. H. G. Sperling, "Some comparisons among spectral sensitivity data obtained in different retinal locations and with two sizes of foveal stimulus," Ph.D. thesis, University Microfilms, Ann Arbor, Michigan, 1953.
  18. R. A. Weale, J. Physiol. (London) 114, 435 (1951); 119, 170 (1953).

Bridgman, C. W.

C. W. Bridgman, J. Opt. Soc. Am. 42, 832 (1952); 44, 394 (1954).

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

Dimmick, F. L.

J. Smith and F. L. Dimmick, Medical Research Laboratory Report No. 174, 10, 56 (1951).

F. L. Dimmick, Textile Colorist and Converter 67, 114 (1945).

L. S. MacMartin and F. L. Dimmick, Medical Research Laboratory Report No. 150, 8, 94 (1949).

Farnsworth, D.

D. Farnsworth, J. Opt. Soc. Am. 33, 568 (1943).

Graham, C. H.

Y. Hsia and C. H. Graham, Proc. Natl. Acad. Sci. 38, 80 (1952); L. M. Hurvich and D. Jameson, J. Opt. Soc. Am. 43, 485 (1953); L. C. Thomson, Proc. Phys. Soc. (London) B62, 787 (1949).

Hecht, S.

S. Hecht and R. E. Williams, J. Gen. Physiol. 5, 1 (1922).

Hsia, Y.

Y. Hsia and C. H. Graham, Proc. Natl. Acad. Sci. 38, 80 (1952); L. M. Hurvich and D. Jameson, J. Opt. Soc. Am. 43, 485 (1953); L. C. Thomson, Proc. Phys. Soc. (London) B62, 787 (1949).

MacMartin, L. S.

L. S. MacMartin and F. L. Dimmick, Medical Research Laboratory Report No. 150, 8, 94 (1949).

Nutting, P. G.

P. G. Nutting, Bull. Bur. Standards 7, 235 (1910).

Sloan, L. L.

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

Smith, J.

J. Smith and F. L. Dimmick, Medical Research Laboratory Report No. 174, 10, 56 (1951).

Sperling, H. G.

H. G. Sperling, "Some comparisons among spectral sensitivity data obtained in different retinal locations and with two sizes of foveal stimulus," Ph.D. thesis, University Microfilms, Ann Arbor, Michigan, 1953.

Stiles, W . S.

W . S. Stiles, Ned. Tijdschr. Natuurk. 15, 125 (1949); G. Wald, Science 101, 653 (1945); B. H. Crawford, Proc. Phys. Soc. (London) B62, 321 (1949).

Walters, H. V.

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

Weale, R. A.

R. A. Weale, J. Physiol. (London) 114, 435 (1951); 119, 170 (1953).

Weaver, K. S.

K. S. Weaver, J. Opt. Soc. Am. 27, 36 (1937).

Williams, R. E.

S. Hecht and R. E. Williams, J. Gen. Physiol. 5, 1 (1922).

Wright, W. D.

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

Other (18)

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

Y. Hsia and C. H. Graham, Proc. Natl. Acad. Sci. 38, 80 (1952); L. M. Hurvich and D. Jameson, J. Opt. Soc. Am. 43, 485 (1953); L. C. Thomson, Proc. Phys. Soc. (London) B62, 787 (1949).

P. G. Nutting, Bull. Bur. Standards 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).

K. S. Weaver, J. Opt. Soc. Am. 27, 36 (1937).

See reference 5, p. 353.

C. W. Bridgman, J. Opt. Soc. Am. 42, 832 (1952); 44, 394 (1954).

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

J. Smith and F. L. Dimmick, Medical Research Laboratory Report No. 174, 10, 56 (1951).

F. L. Dimmick, Textile Colorist and Converter 67, 114 (1945).

D. Farnsworth, J. Opt. Soc. Am. 33, 568 (1943).

W . S. Stiles, Ned. Tijdschr. Natuurk. 15, 125 (1949); G. Wald, Science 101, 653 (1945); B. H. Crawford, Proc. Phys. Soc. (London) B62, 321 (1949).

See reference 4, p. 82.

L. S. MacMartin and F. L. Dimmick, Medical Research Laboratory Report No. 150, 8, 94 (1949).

S. Hecht and R. E. Williams, J. Gen. Physiol. 5, 1 (1922).

H. G. Sperling, "Some comparisons among spectral sensitivity data obtained in different retinal locations and with two sizes of foveal stimulus," Ph.D. thesis, University Microfilms, Ann Arbor, Michigan, 1953.

R. A. Weale, J. Physiol. (London) 114, 435 (1951); 119, 170 (1953).

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