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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 28, Iss. 5 — May. 1, 1938
  • pp: 133–139

Optics InfoBase > JOSA > Volume 28 > Issue 5 > The Minimum Perceptible Colorimetric Purity as a Function of Dominant Wave-Length

The Minimum Perceptible Colorimetric Purity as a Function of Dominant Wave-Length

IRWIN G. PRIEST and F. G. BRICKWEDDE  »View Author Affiliations


JOSA, Vol. 28, Issue 5, pp. 133-139 (1938)
http://dx.doi.org/10.1364/JOSA.28.000133


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Abstract

A 4° square, two-part photometric field, symmetrical about a vertical division and viewed through a pupil 3 mm in diameter, is illuminated in both parts by artificial sunlight at a constant brightness of about 3 or 4 millilamberts (retinal illumination, 70 to 90 photons) with a surrounding field of about 0.5 millilambert. Homogeneous light is added to one-half, and sunlight simultaneously subtracted so that the field remains matched in brightness. Two adjustments of the mixture are made: (1) the least purity perceptible with certainty (pmax,), and (2) the greatest imperceptible purity (pmin).The purity of these mixtures is then measured, increased accuracy being obtained by measuring a known large multiple of the homogeneous brightness. Values of pmax and pmin have been obtained as a function of the wave-length of the homogeneous component; these values are reported in detail, and some discussion of their interpretation is given.

Citation
IRWIN G. PRIEST and F. G. BRICKWEDDE, "The Minimum Perceptible Colorimetric Purity as a Function of Dominant Wave-Length," J. Opt. Soc. Am. 28, 133-139 (1938)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-28-5-133

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