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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 61, Iss. 6 — Jun. 1, 1971
  • pp: 821–828

Adaptation and Critical Duration for Stiles π Mechanisms

TOSHIO UETSUKI and MITSUO IKEDA  »View Author Affiliations


JOSA, Vol. 61, Issue 6, pp. 821-828 (1971)
http://dx.doi.org/10.1364/JOSA.61.000821


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Abstract

By the use of two-color threshold technique, the critical duration was measured at 10 retinal-illuminance levels of the adapting field. The critical duration does not always decrease monotonically with increase of the adapting retinal illuminance; it sometimes decreases at first and then increases again before it finally decreases. All these results can be explained very clearly by the hypothesis that the critical duration is determined by the state of adaptation of the cone system concerned. If it is well adapted, the critical duration is short, in general. The experimentally obtained critical-duration-vs-adapting-illuminance curve is composed of component tc-E curves of the underlying cone systems, the π12,π4,and π5, mechanisms. The differences among these mechanisms, as to their critical-duration characteristics, were found; the first two, or blue systems, had long critical durations and less decrease with adaptation but the last two had short critical durations and considerable decrease with adaptation.

Citation
TOSHIO UETSUKI and MITSUO IKEDA, "Adaptation and Critical Duration for Stiles π Mechanisms," J. Opt. Soc. Am. 61, 821-828 (1971)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-61-6-821

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