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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 72, Iss. 5 — May. 1, 1982
  • pp: 666–667

La Jolla analytic calorimeter

Robert M. Boynton and Allen L. Nagy  »View Author Affiliations


JOSA, Vol. 72, Issue 5, pp. 666-667 (1982)
http://dx.doi.org/10.1364/JOSA.72.000666


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Abstract

A new apparatus for the study of human chromatic discrimination is briefly described.

© 1982 Optical Society of America

Citation
Robert M. Boynton and Allen L. Nagy, "La Jolla analytic calorimeter," J. Opt. Soc. Am. 72, 666-667 (1982)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-72-5-666


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References

  1. R. W. Burnham, "A colorimeter for research in color perception," Am. J. Psychol. 65, 603–608 (1952).
  2. R. M. Boynton and N. Kambe, "Chromatic difference steps measured along theoretically critical axes," Color Res. and Appln. 5, 13–23 (1980).
  3. D. W. MacAdam, "Visual sensitivities to color differences in daylight," J. Opt. Soc. Am. 32, 247–274 (1942).
  4. Our calculations and predictions are based on the cone action spectra of V. C. Smith and J. Pokorny, "Spectral sensitivity of the foveal cone pigments between 400 and 500 nm," Vision Res. 15, 161–171 (1975).
  5. Axes of tritanopic confusion have been directly tested by the following method: With the cyan-violet slide in the full cyan position (minimum B-cone excitation), the gap between the fields was removed to permit settings of minimally distinct borders through adjustments of the red-green slide of the right field, with the left field set at the reference white. The minimally distinct border should occur when the R - and G -cone excitations are equal for the two field components. The cyan-violet slide was then moved to the full violet position (maximum B-cone excitation) and the procedure was repeated. Figure 3 shows the tritan axis determined in this way; it deviates only slightly from the predicted one.
  6. Y. LeGrand, "Les seuils différentiels de couleurs dans la théorie de Young," Rev. Opt. Theor. Instrum. 28, 261–278 (1979).
  7. R. M. Boynton, Human Color Vision (Holt, Rinehart and Winston, New York, 1979), Chap. 8.
  8. W. R. J. Brown and D. A. MacAdam, "Visual sensitivities to combined chromaticity and luminance differences," J. Opt. Soc. Am. 39, 808–834 (1949).
  9. G. Wyszecki and G. H. Fielder, "New color matching ellipses," in Color Metrics, J. J. Vos, L. F. C. Friele, and P. L. Walraven eds. (Institute for Perception TNO, Soesterberg, Netherlands, 1972), p. 183.
  10. R. M. Boynton and A. L. Nagy, "The La Jolla analytic colorimeter: specifications, procedures, and calibrations," CHIP Rep. No. 109 (Center for Human Information Processing, University of California at San Diego, La Jolla, Calif.). (Available only from the authors); also to be published by the Physics Auxiliary Publication Service, American Institute of Physics, 335 East 45 Street, New York, New York 10017.

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