Dual-fresnel field lens for a single-panel LCD projection system

Details Dual-fresnel field lens for a single-panel LCD projection system Dual-fresnel field lens for a single-panel LCD projection system

1997-05-01

1999-08-17

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Lens or prism separate from projection system

345 5, G02F 11335

Patent

active

059401524

ABSTRACT:
A dual-Fresnel field lens liquid crystal display projection system which includes first and second flat Fresnel lenses having their faceted surfaces facing one another and positioned adjacent to one another along the optical axis of the system between a liquid crystal display light modulator and the entrance aperture to a projection lens assembly to form a field lens assembly for the projection system.

REFERENCES:
patent: 5325218 (1994-06-01), Willett et al.
patent: 5355187 (1994-10-01), Ogino et al.
patent: 5537171 (1996-07-01), Ogino et al.
patent: 5676804 (1997-10-01), Fujii et al.

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