Laser glare in the cockpit: psychophysical estimates versus model predictions of veiling luminance distribution
article
Two methods for estimating the visual effects of light scattered from a laser glare source were compared: 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 a 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 3 6 eccentricities between 0.25 and 8 deg). Measured Weber fractions were used to calculate EBLs 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.
TNO Identifier
10557
Source
Applied Optics, 40(10), pp. 1715-1725.
Publisher
Optical Society of America OSA
Collation
10 p.
Pages
1715-1725
Files
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