OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 48, Iss. 6 — Jun. 1, 1958
  • pp: 422–428

Relationship between Stimulus Size and Threshold Intensity in the Fovea Measured at Four Exposure Times

BEVERLY M. HILLMANN  »View Author Affiliations


JOSA, Vol. 48, Issue 6, pp. 422-428 (1958)
http://dx.doi.org/10.1364/JOSA.48.000422


View Full Text Article

Acrobat PDF (638 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

An experimental determination was made of absolute visual thresholds in the human fovea. An apparatus permitting independent variation of area and exposure time, and having a fixation device that minimally affects the adaptation level of the region under investigation was used. Seven stimulus areas, ranging from 1 minute to 1 degree in diameter were presented to 4 subjects at durations of 1.1, 3.8, 10.0, and 48.0 milliseconds. The results show that all area-threshold functions depart from Ricco’s law. The functions which were obtained depart from linearity, while the degree of curvature varies among subjects. As exposure time is increased there is a regular related decrease in thresholds for all stimuli. This decrease in threshold is in good agreement with the Bunson-Roscoe law, which states that the product of time and intensity is a constant.

Citation
BEVERLY M. HILLMANN, "Relationship between Stimulus Size and Threshold Intensity in the Fovea Measured at Four Exposure Times," J. Opt. Soc. Am. 48, 422-428 (1958)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-48-6-422


Sort:  Author  |  Journal  |  Reset

References

  1. W. Nagel in Helmholtz' Treatise on Physiological Optics, translated from 3rd German Edition, Vol. II, "The Sensations of Vision" (Optical Society of America, New York, 1924).
  2. H. Piéron, Ann. psychol. 30, 87 (1929).
  3. Graham, Brown, and Mote, J. Exptl. Psychol. 24, 555 (1939).
  4. E. Baumgardt, J. Gen. Physiol. 31, 269 (1948).
  5. E. Willmer, Quart. J. Exptl. Psychol. 2, 53 (1950).
  6. R. Houstoun, Vision and Colour Vision (Longmans, Green, London, 1932), pp. 49–51.
  7. C. Graham and N. Bartlett, J. Exptl. Psychol. 24, 574 (1939).
  8. H. Karn, J. Gen. Psychol. 14, 360 (1936).
  9. H. Sperling, MRL Report No. 287 (May 20, 1957).
  10. B. O'Brien and N. Miller, Wright Air Development Center Technical Report 53–198 (May, 1953).
  11. G. Wald, J. Gen. Physiol. 21, 269 (1938).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited