OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 37, Iss. 7 — Jul. 1, 1947
  • pp: 546–553

The Sensitivity of the Human Eye to Infra-Red Radiation

DONALD R. GRIFFIN, RUTH HUBBARD, and GEORGE WALD  »View Author Affiliations


JOSA, Vol. 37, Issue 7, pp. 546-553 (1947)
http://dx.doi.org/10.1364/JOSA.37.000546


View Full Text Article

Acrobat PDF (937 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

The spectral sensitivity of human vision has been measured in the near infra-red, in two areas of the dark adapted eye: the central fovea (cones) to 1000 mµ, and a peripheral area, in which the responses are primarily caused by rods, to 1050 mµ. In both cases the estimates of spectral sensitivity are based upon determinations of the visual thresholds for radiation passing through a series of infra-red filters. By successive approximation, sensitivity functions were chosen which were consistent with the observed thresholds.

The spectral sensitivity of the fovea determined in this way is consistent with previous measurements of Goodeve on the unfixated eye. At wave-lengths beyond 800 mµ the periphery becomes appreciably more sensitive than the fovea. This tendency increases at longer wave-lengths, so that at the longest wave-lengths studied, the radiation appeared colorless at the threshold and stimulated only rods.

Lengthening the exposure time increases the sensitivity of the peripheral retina relative to the fovea. Our measurements involved exposures of 1 second and fields subtending a visual angle of 1 degree. With shorter exposures or smaller fields the fovea is favored, so that under such circumstances the fovea may become more sensitive than the periphery well into the infra-red.

At 1050 mµ the sensitivity of the peripheral retina is only 3×10-13 times its maximum value at 505 mµ. A computation shows that by 1150 or 1200 mµ radiation should be more readily felt as heat by the skin than seen as light by the eye.

Citation
DONALD R. GRIFFIN, RUTH HUBBARD, and GEORGE WALD, "The Sensitivity of the Human Eye to Infra-Red Radiation," J. Opt. Soc. Am. 37, 546-553 (1947)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-37-7-546

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
Log in to access OSA Member Subscription

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
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited