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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 63, Iss. 7 — Jul. 1, 1973
  • pp: 884–888

Brightness of isolated colored lights

C. R. Cavonius and R. Hilz  »View Author Affiliations


JOSA, Vol. 63, Issue 7, pp. 884-888 (1973)
http://dx.doi.org/10.1364/JOSA.63.000884


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Abstract

The brightness of 2° centrally fixated monochromatic lights was measured by three methods: magnitude estimation, in which the observer made numerical estimates of brightness; delayed matching, in which he adjusted the luminance of an achromatic field until it matched the remembered brightness of the monochromatic field; and conventional heterochromatic photometry. The photometry data resemble the CIE Vλ function, but both the estimation and delayed-matching procedures result in substantially higher sensitivities to short-wavelength stimuli. Part of this excess sensitivity is due to scotopic intrusion and can be eliminated by light adaptation. The remaining sensitivity to short-wavelength stimuli resembles the sensitivity of peripheral cones.

Citation
C. R. Cavonius and R. Hilz, "Brightness of isolated colored lights," J. Opt. Soc. Am. 63, 884-888 (1973)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-63-7-884

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