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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 10 — Apr. 1, 2001
  • pp: 1715–1726

Laser Glare in the Cockpit: Psychophysical Estimates versus Model Predictions of Veiling Luminance Distribution

Dennis W. Blick, Jeremy M. A. Beer, William D. Kosnik, Steven Troxel, Alexander Toet, Jan Walraven, and Wallace Mitchell  »View Author Affiliations


Applied Optics, Vol. 40, Issue 10, pp. 1715-1726 (2001)
http://dx.doi.org/10.1364/AO.40.001715


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Abstract

Two methods for estimating the visual effects of light scattered from a laser glare source were compared: (1) a veiling luminance (VL) model that convolves a radiometric scan of the corneal light distribution with a point-spread function to calculate the retinal distribution and (2) psychophysically determined equivalent background luminance (EBL). For six subjects, detection thresholds for a 12-arc-min-diameter test spot were measured at 24 points in the glare field (4 quadrants × 6 eccentricities between 0.25 and 8 deg). Measured Weber fractions were used to calculate EBL’s for each test point. Output of the VL model matched the EBL data well, but underestimated the EBL at the smallest (0.25-deg) eccentricity and overestimated it at eccentricities from 1 to 4 deg. This model can be a useful predictor of visual decrements in a variety of glare situations.

© 2001 Optical Society of America

OCIS Codes
(290.5820) Scattering : Scattering measurements
(330.1880) Vision, color, and visual optics : Detection
(330.4060) Vision, color, and visual optics : Vision modeling
(330.5370) Vision, color, and visual optics : Physiological optics
(330.5510) Vision, color, and visual optics : Psychophysics
(330.7310) Vision, color, and visual optics : Vision

Citation
Dennis W. Blick, Jeremy M. A. Beer, William D. Kosnik, Steven Troxel, Alexander Toet, Jan Walraven, and Wallace Mitchell, "Laser Glare in the Cockpit: Psychophysical Estimates versus Model Predictions of Veiling Luminance Distribution," Appl. Opt. 40, 1715-1726 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-10-1715


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