Prism assembly for use in optical devices and projector...

Details Prism assembly for use in optical devices and projector... Prism assembly for use in optical devices and projector...

2008-07-08

2008-07-08

Sever, Andrew T (Department: 2851)

Optics: image projectors

Composite projected image

Multicolor picture

C353S081000, C348S771000, C349S057000, C359S831000

Reexamination Certificate

active

11210749

ABSTRACT:
A prism assembly for use in optical devices, which includes a total internal reflection (TIR) assembly for redirecting an incoming lightbeam, a color prism assembly for splitting the incoming lightbeam into spectral bands, and at least one reflection light valve for redirecting and recombining the spectral bands to form an outgoing lightbeam, wherein the total internal reflection assembly has a back surface and said color prism assembly has a frontal surface facing said back surface and being parallel therewith, and wherein said back surface forms an angle with a general plane defined by the incoming and the outgoing lightbeams, which is different from 90°.

REFERENCES:
patent: 6157420 (2000-12-01), Nakanishi et al.
patent: 6249387 (2001-06-01), Poradish et al.
patent: 6250763 (2001-06-01), Fielding et al.
patent: 6561652 (2003-05-01), Kwok et al.
patent: 6644813 (2003-11-01), Bowron
patent: 7031062 (2006-04-01), Kao
patent: 2002/0141070 (2002-10-01), Sawai
patent: 2003/0048423 (2003-03-01), Aastuen et al.
patent: 2003/0147158 (2003-08-01), Penn
patent: 2006/0044654 (2006-03-01), Vandorpe et al.

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