Polarization perception device

Details Polarization perception device Polarization perception device

1995-01-18

1997-01-28

Shafer, Ricky D.

Optical: systems and elements

Polarization without modulation

Polarization by reflection or refraction

359490, 359501, 356364, G02B 530

Patent

active

055982980

ABSTRACT:
A polarization perception device comprises a base and a polarizing filter having opposite broad sides and a centerline perpendicular thereto. The filter is mounted on the base for relative rotation and with a major portion of the area of the filter substantially unobstructed on either side. A motor on the base automatically moves the filter angularly about its centerline at a speed slow enough to permit changes in light transmission by virtue of such movement to be perceived as light-dark pulses by a human observer, but fast enough so that the light phase of each such pulse occurs prior to fading of the light phase image of the preceding pulse from the observer's retina. In addition to an observer viewing a scene in real time through the filter while it is so angularly moved, or instead of such observation, the scene can be photographed, filmed or taped by a camera whose lens is positioned behind the filter.

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patent: 3804522 (1974-04-01), Smith
patent: 5264916 (1993-11-01), Bushman
patent: 5345308 (1994-09-01), Bushman

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