Electro-optic flashlight electro-optically controlling the emitt

Details Electro-optic flashlight electro-optically controlling the emitt Electro-optic flashlight electro-optically controlling the emitt

1993-09-02

1995-06-13

Lazarus, Ira S.

Illumination

Self powered lamp

362208, 362307, 362317, F21L 1502

Patent

active

054249279

ABSTRACT:
A flashlight is disclosed comprising a light source and a reflector for collimating the light emitted by the light source to form a collimated light beam. An electro-optically controlled region is disposed forwardly of the light source, the collimated light beam being incident upon and passing through the electro-optic region. The electro-optic region may be operated in at least two states. In a first embodiment, and in a first state, the electro-optic region does not substantially affect the collimation of the light beam incident thereon, and the flashlight produces a spot beam. Also in the first embodiment, and in a second state, the electro-optic region scatters forwardly the collimated beam incident thereon, and thus the flashlight produces a well-diffused flood beam.

REFERENCES:
patent: 1712368 (1929-05-01), Voorhees
patent: 2218678 (1940-10-01), Hoffman
patent: 2628305 (1953-02-01), Talbot et al.
patent: 2947851 (1960-08-01), Lozeau
patent: 3527894 (1970-09-01), Mesenhimer et al.
patent: 3900727 (1975-08-01), Hutz
patent: 3943428 (1976-03-01), Whidden
patent: 4037929 (1977-07-01), Bricot et al.
patent: 4053821 (1977-10-01), Mose, Jr. et al.
patent: 4190330 (1980-02-01), Berreman
patent: 4300818 (1981-11-01), Schacher
patent: 4398238 (1983-08-01), Nelson
patent: 4441791 (1984-04-01), Hornbeck
patent: 4461989 (1984-07-01), Dutson et al.
patent: 4466703 (1984-08-01), Nishimoto
patent: 4514648 (1985-04-01), Dutson et al.
patent: 4564267 (1986-01-01), Nishimoto
patent: 4572616 (1986-02-01), Kowel et al.
patent: 4592628 (1986-06-01), Altman et al.
patent: 4601545 (1986-07-01), Kern
patent: 4605994 (1986-08-01), Krieg
patent: 4688900 (1987-08-01), Doane et al.
patent: 4756605 (1988-07-01), Okada et al.
patent: 4765719 (1988-08-01), Fergason
patent: 4774624 (1988-09-01), Qualich
patent: 4806776 (1989-02-01), Kley
patent: 4807097 (1989-02-01), Gammache
patent: 4984140 (1991-01-01), Ellion
patent: 5031080 (1991-07-01), Aikens et al.
patent: 5143442 (1992-09-01), Ishikawa et al.
Cuff, Daniel F., "Flashlights with a Twist", Jun. 13, 1993, The New York Times.
Brinkley et al., "Liquid Crystal Adaptive Lens: Beam Translation and Field Meshing," 1988, pp. 4578-4586, Applied Optics, vol. 27, No. 21.
Land, E. M., "Some Aspects of the Development of Sheet Polarizers", 1951, pp. 957-963, Journal of the Optical Society of America.
Sato et al., "Variable Focus Liquid-Crystal Fresnel Lens," 1985, pp. L626-L628, Japanese Journal of Applied Physics.
Tannas, L. E., "Flat Panel Displays and CRTs", 1985, pp. 415-454.

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