Color separation prism assembly

Details Color separation prism assembly Color separation prism assembly

2007-09-18

2007-09-18

Dowling, William C. (Department: 2851)

Optics: image projectors

Prism in light path

C353S033000, C359S638000, C359S634000

Reexamination Certificate

active

11095574

ABSTRACT:
A color separation prism assembly. The color separation prism assembly includes a polarizing beam splitter and a plurality of prism blocks. The polarizing beam splitter is coated with a polarizing beam splitter coating on a diagonal plane thereof. A first filter and a second filter, each corresponding to a specific color band, are respectively formed on two adjacent bounding surfaces of the polarizing beam splitter. A first prism block and a second prism block are connected to the polarizing beam splitter through the first filter and the second filter, respectively. The second prism block is a rectangular prism with a third filter formed on a base surface thereof. A third prism block is connected to the rectangular prism through the third filter. An angle formed by an inclined side of the rectangular prism and the base surface of the third filter is no more than 30°.

REFERENCES:
patent: 4478494 (1984-10-01), Soref
patent: 5717472 (1998-02-01), Lee
patent: 6490087 (2002-12-01), Fulkerson et al.
patent: 6715882 (2004-04-01), Ishii
patent: 6885403 (2005-04-01), Ho et al.
patent: 2006/0044525 (2006-03-01), Lee et al.

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