Color separation beam splitter for projectors

Details Color separation beam splitter for projectors Color separation beam splitter for projectors

2005-04-26

2005-04-26

Vu, Ngoc-Yen (Department: 2612)

Television

Camera, system and detail

Optics

C348S337000, C348S339000, C348S336000, C359S831000, C359S833000, C353S033000

Reexamination Certificate

active

06885403

ABSTRACT:
A color separation beam splitter for projectors is provided, which comprises a plurality of prisms connected with each other and three optical interference filters having different wavelength ranges respectively formed on side surfaces of the plurality of prisms. The three optical interference filters include a yellow color reflective dichroic mirror, a red color reflective dichroic mirror, and a blue color reflective dichroic mirror to filter out the yellow light and provide three primary color lights with high color purity. Moreover, by reflecting a light beam twice, the number of layers of dichroic mirror can be reduced. The color purity of the light is increased after reflected twice by the dichroic mirrors. Moreover, configuration of a liquid crystal projector by use of this prism assembly as color separation unit is also disclosed.

REFERENCES:
patent: 4323918 (1982-04-01), Bendell
patent: 4334238 (1982-06-01), Morishita et al.
patent: 4507679 (1985-03-01), Bendell
patent: 4725880 (1988-02-01), Dischert
patent: 4803523 (1989-02-01), Pearson
patent: 4873569 (1989-10-01), Hirosawa
patent: 5436661 (1995-07-01), Yamamoto et al.
patent: 5754260 (1998-05-01), Ooi et al.
patent: 5777373 (1998-07-01), Groenig
patent: 5777673 (1998-07-01), Yoshikawa
patent: 5777674 (1998-07-01), Ohmuro
patent: 6053615 (2000-04-01), Peterson et al.
patent: 6317205 (2001-11-01), Merklein
patent: 6549338 (2003-04-01), Wolverton et al.
patent: 6614478 (2003-09-01), Mead
patent: 20020008770 (2002-01-01), Ho et al.
patent: 20030227578 (2003-12-01), Imahase et al.

Affiliated with

Also associated with

Rating

Color separation beam splitter for projectors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Color separation beam splitter for projectors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color separation beam splitter for projectors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3391743