US PATENT SUBCLASS 349 / 57
.~ Lens or prism separate from projection system (i.e., it is not integral part of illumination system)

Current as of: June, 1999
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349 /   HD   LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS

56  DF  PARTICULAR STRUCTURE {7}
57.~ Lens or prism separate from projection system (i.e., it is not integral part of illumination system)

DEFINITION

Classification: 349/57

Lens or prism separate from projection system (i.e., it is not integral part of illumination system):

(under subclass 56) Subject matter wherein the liquid crystal device includes a specific lens or prism near or adjacent to the liquid crystal cell, wherein the lens or prism is not an integral part of a projection system nor a light guide of the liquid crystal illumination system.

(1) Note. Included here are collimating lenses and prisms for redirecting light entering or leaving the liquid crystal cell.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5+, for using lens or prisms in a projection device.

62+, for illumination systems having integral lens or prism.