Abstract

For a series of four monochromatic stimuli (468, 554, 640, and 668 nm) of differing preadapting luminances (−1.50 to 2.50 log mL), determinations have been made of the luminances required for conditioning stimuli of the same wavelength to be equivalent in brightness. Differential preadaptation is provided by haploscopic stimulation. Three hundred msec after the cessation of preadapting stimuli, variable conditioning stimuli of 300-msec duration are presented to the eye which is light adapted, and matches are made to a series of standard stimuli presented to the contralateral eye, which is adapted to a dim reference level. The psychophysical equivalence of these equally bright conditioning stimuli has been evaluated by an increment threshold technique; for conditioning stimuli and test flashes centrally fixated and of 5° subtense, luminance-discrimination functions indicate rod–cone breaks which are correlated with brightness equivalence. “On-response” functions, tracing temporal changes in the threshold of a superimposed test flash, have been determined and analyzed in terms of the correlations between brightness, luminance and extent of visual masking.

© 1967 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Visual Responses to Equally Bright Stimuli of Unequal Luminance

Judith Wheeler Onley and Robert M. Boynton
J. Opt. Soc. Am. 52(8) 934-940 (1962)

Light Adaptation and the Brightness of Brief Foveal Stimuli*

Judith Wheeler Onley
J. Opt. Soc. Am. 51(6) 667-673 (1961)

Luminance, not brightness, determines temporal brightness enhancement with chromatic stimuli

Richard W. Bowen and Mary Jo Nissen
J. Opt. Soc. Am. 69(4) 581-584 (1979)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription