Diffraction grating type liquid crystal display device in viewfi

Details Diffraction grating type liquid crystal display device in viewfi Diffraction grating type liquid crystal display device in viewfi

1993-07-16

1994-03-29

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 95, 359 81, 359569, 354471, G02F 113, G02B 518, G03B 1720

Patent

active

052990370

ABSTRACT:
There is provided a display device in a viewfinder, including a diffraction grating whose shape is determined at an interface between first and second materials, at least one of the first and second materials being adapted to have a variable refractive index for light reflected by an object to be photographed, and control means for changing the refractive index of the first and/or second materials, wherein the control means causes the light from the object to substantially pass through the diffraction grating in a first state and causes the diffraction grating to partially diffract the light from the object to display a pattern in a second state.

REFERENCES:
patent: 3698795 (1972-10-01), Flint
patent: 3791716 (1974-02-01), Borel et al.
patent: 3813145 (1974-05-01), Hedman, Jr. et al.
patent: 3843231 (1974-10-01), Borel et al.
patent: 3961348 (1976-06-01), Miyazaki
patent: 4140378 (1979-02-01), Suzuki et al.
patent: 4165930 (1979-08-01), Matsumoto et al.
patent: 4251137 (1981-02-01), Knop et al.
patent: 4255032 (1981-03-01), Matsumoto et al.
patent: 4294529 (1981-10-01), Sato et al.
patent: 4367924 (1983-01-01), Clark et al.
patent: 4374612 (1983-02-01), Matsumura et al.
patent: 4389096 (1983-06-01), Hori et al.
patent: 4411495 (1983-10-01), Beni et al.
patent: 4426130 (1984-01-01), Knop
patent: 4465355 (1984-08-01), Murakami et al.
patent: 4536061 (1985-08-01), Nishimura
patent: 4560264 (1985-12-01), Kitazawa et al.
patent: 4572617 (1986-02-01), Masaki et al.
patent: 4729640 (1988-03-01), Sakata
patent: 4729641 (1988-03-01), Matsuoka et al.
patent: 4751509 (1988-06-01), Kubota et al.
patent: 4834500 (1989-05-01), Hilsum et al.
patent: 4850681 (1989-07-01), Yamanobe et al.
patent: 4850682 (1989-07-01), Gerritsen
patent: 5013141 (1991-05-01), Sakata
S. Pollack--"A Low Noise Amplifier", pp. 140-144--SID 76 DIGEST--May 1976.
S. Lo--"Light Diffraction Phenomena in an A.C. . . . Nematic Liquid Crystal Sample", pp. 2138-2140--Journal Applied Physics--vol. 42--Aug. 1971.

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