Liquid crystal aperture in a camera

Details Liquid crystal aperture in a camera Liquid crystal aperture in a camera

2006-04-18

2009-12-15

Schechter, Andrew (Department: 2881)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S200000, C396S457000, C396S249000

Reexamination Certificate

active

07633587

ABSTRACT:
An electronic aperture comprises first and second polarizers and a liquid crystal layer disposed between the first and second polarizers. The liquid crystal layer comprises a plurality of liquid crystals having an angular orientation that varies as a function of position. In one exemplary embodiment, the angular orientation of the liquid crystals varies as a function of distance from an optical axis.

REFERENCES:
patent: 4333720 (1982-06-01), Suzuki et al.
patent: 4431288 (1984-02-01), Iwata et al.
patent: 5097352 (1992-03-01), Takahashi et al.
patent: 5434687 (1995-07-01), Kawata et al.
patent: 5641958 (1997-06-01), Rudeen
patent: 6512563 (2003-01-01), Tajima
patent: 02113224 (1990-04-01), None
“Thin Film Camera Iris Using Liquid Crystalline Material,” Originally disclosed in the IBM TDB (IBM Technical Disclosure Bulletin) [Mar. 1985], 1 page.

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