Abstract

An empirical formula can express the equivalent luminance of any light as a function of the scotopic and photopic luminances. Tests show the suitability of this standard observer for large-field photometry at any level. A restriction on the use of the term equivalent luminance is suggested.

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  1. D. A. Palmer, Nature 209, 276 (1966).
  2. D. A. Palmer, Vision Res. 7, 619 (1967).
  3. J. W. Walsh, Photometry (Constable, London, 1962).
  4. G. Wyszecki, J. Opt. Soc. Am. 57, 254 (1967), gives a recent summary of literature on this subject.
  5. CIE Publication 11A, 1964, Proceedings of 1963 meeting, Vienna (CIE Bureau Central, Paris 1964) 1st ed.
  6. D. L. MacAdam, J. Soc. Motion Picture Television Engrs. 64, 629 (1955).
  7. J. A. S. Kinney, J. Opt. Soc. Am. 45, 507 (1955).
  8. J. A. S. Kinney, J. Opt. Soc. Am. 48, 185 (1958).
  9. J. A. S. Kinney, J. Opt. Soc. Am. 54, 671 (1964). Dr. Jo Ann S. Kinney is thanked for providing details of the original data.
  10. H. V. Walters and W. D. Wright, Proc. Rov. Soc. (London) B131, 340 (1943).
  11. A. H. Taylor, Illum. Eng. 38, 89 (1943).
  12. C2 in Planck’s formula was taken as 1.438 × 10-2 m °K.

Kinney, J. A. S.

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

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

J. A. S. Kinney, J. Opt. Soc. Am. 54, 671 (1964). Dr. Jo Ann S. Kinney is thanked for providing details of the original data.

MacAdam, D. L.

D. L. MacAdam, J. Soc. Motion Picture Television Engrs. 64, 629 (1955).

Palmer, D. A.

D. A. Palmer, Nature 209, 276 (1966).

D. A. Palmer, Vision Res. 7, 619 (1967).

Taylor, A. H.

A. H. Taylor, Illum. Eng. 38, 89 (1943).

Walsh, J. W.

J. W. Walsh, Photometry (Constable, London, 1962).

Walters, H. V.

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

Wright, W. D.

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

Wyszecki, G.

G. Wyszecki, J. Opt. Soc. Am. 57, 254 (1967), gives a recent summary of literature on this subject.

Other (12)

D. A. Palmer, Nature 209, 276 (1966).

D. A. Palmer, Vision Res. 7, 619 (1967).

J. W. Walsh, Photometry (Constable, London, 1962).

G. Wyszecki, J. Opt. Soc. Am. 57, 254 (1967), gives a recent summary of literature on this subject.

CIE Publication 11A, 1964, Proceedings of 1963 meeting, Vienna (CIE Bureau Central, Paris 1964) 1st ed.

D. L. MacAdam, J. Soc. Motion Picture Television Engrs. 64, 629 (1955).

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

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

J. A. S. Kinney, J. Opt. Soc. Am. 54, 671 (1964). Dr. Jo Ann S. Kinney is thanked for providing details of the original data.

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

A. H. Taylor, Illum. Eng. 38, 89 (1943).

C2 in Planck’s formula was taken as 1.438 × 10-2 m °K.

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