Optics: image projectors – Polarizer or interference filter
Reexamination Certificate
2005-08-30
2005-08-30
Nguyen, Judy (Department: 2851)
Optics: image projectors
Polarizer or interference filter
C353S031000, C353S033000, C353S081000, C349S009000, C359S490020, C359S834000
Reexamination Certificate
active
06935746
ABSTRACT:
The invention includes a color projection system comprising having a light source optically coupled to a light management device. The light management device being optically coupled to a polarizer. The color projection system also includes a projection lens optically coupled to the polarizer. Additionally, a plate is disposed between the polarizer and the projection lens. The plate has quarter-wave properties. The light management device has a number of polarizing beamsplitter (PBS) cubes, with one or more subsets of which are optically coupled to each other, and at least one light blocking region disposed between a first and a second PBS cube of the number of PBS cubes. As result reduction of stray light in a reflective projection system is facilitated.
REFERENCES:
patent: 4859055 (1989-08-01), Gal et al.
patent: 5623349 (1997-04-01), Clarke
patent: 5777789 (1998-07-01), Chiu et al.
patent: 5864374 (1999-01-01), Ito et al.
patent: 5993008 (1999-11-01), Hashimukai et al.
patent: 6327093 (2001-12-01), Nakanishi et al.
patent: 6331878 (2001-12-01), Takahara
patent: 6511183 (2003-01-01), Shimizu et al.
patent: 6582080 (2003-06-01), Gibbon et al.
patent: 6698896 (2004-03-01), Suzuki et al.
patent: 2002/0097382 (2002-07-01), Suzuki et al.
patent: 2002/0109820 (2002-08-01), Pan
patent: 2002/0135540 (2002-09-01), Yoneyama et al.
patent: 2003/0025880 (2003-02-01), Newell et al.
patent: 2003/0071973 (2003-04-01), Hansen et al.
patent: 2003/0081179 (2003-05-01), Pentico et al.
patent: WO 00/63738 (2000-10-01), None
Robinson et al., “High Contrast Color Splitting Architecture Using Color Polarization Filters”, SID 00 Digest, p. 92-95.
Merriam-Webster's Collegiate Dictionary, Tenth Edition, copyright 2001, p. 116.
InFocus Corporation
Koval Melissa J
Nguyen Judy
Schwabe Williamson & Wyatt P.C.
LandOfFree
Method and apparatus for reducing scattered light in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reducing scattered light in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reducing scattered light in a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3496170