Optical: systems and elements – Holographic system or element – Having optical element between object and recording medium
Patent
1990-10-19
1992-05-12
Miller, Stanley D.
Optical: systems and elements
Holographic system or element
Having optical element between object and recording medium
359 51, 359 52, 359 98, 351 49, G02F 1133
Patent
active
051132702
ABSTRACT:
A variable density light control apparatus includes plural polarizers, at least two of which are at least partially crossed, and at least one of the polarizers being variable to the extent that it polarizes light as a function of a prescribed input, thereby to control the intensity of light transmitted through the apparatus proportionally to the intensity of the incident light to the apparatus. The range of intensity control can be varied according to the crossed relationship of the polarizers and/or according to the polarization effectiveness of the controllable polarizer. Color effects can be controlled. The apparatus may be utilized in various devices, including displays, windows, eye glasses, and ski goggles.
REFERENCES:
patent: 4048358 (1977-09-01), Shanks
patent: 4190330 (1980-02-01), Berreman
patent: 4264154 (1981-04-01), Petersen
patent: 4279474 (1981-07-01), Belgorod
patent: 4416514 (1983-11-01), Plummer
patent: 4556289 (1985-12-01), Fergason
patent: 4560239 (1985-12-01), Katz
patent: 4579426 (1986-04-01), Onufry
patent: 4641922 (1987-02-01), Jacob
patent: 4688900 (1987-08-01), Doane et al.
patent: 4756605 (1988-07-01), Okada et al.
patent: 4848875 (1989-07-01), Baughman et al.
patent: 4893902 (1990-01-01), Baughman et al.
patent: 4899503 (1990-02-01), Baughman et al.
patent: 4943152 (1990-07-01), Whelan
patent: 4968127 (1990-11-01), Russell et al.
Gross Anita Pellman
Miller Stanley D.
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