Optics: image projectors – Composite projected image – Multicolor picture
Reexamination Certificate
2007-03-13
2007-03-13
Perkey, W. B. (Department: 2851)
Optics: image projectors
Composite projected image
Multicolor picture
C353S081000, C348S757000
Reexamination Certificate
active
10844451
ABSTRACT:
A reflective lighting optical system minimizes a back focusing distance and a depth of the system, and improves a lighting efficiency by disposing a wire grid type PBS (Polarized Beam Splitter) at an oblique angle with respect to a short side of an imager.
REFERENCES:
patent: 6174060 (2001-01-01), Imaoka et al.
patent: 6262851 (2001-07-01), Marshall
patent: 6281866 (2001-08-01), Robinson et al.
patent: 6299312 (2001-10-01), Choi et al.
patent: 6481852 (2002-11-01), Osaka
patent: 6666557 (2003-12-01), Choi
patent: 6910773 (2005-06-01), Nakashima et al.
patent: 2002/0191154 (2002-12-01), Shahzad et al.
patent: 2003/0081179 (2003-05-01), Pentico et al.
patent: 2004/0066492 (2004-04-01), Nakashima et al.
patent: 2004/0252285 (2004-12-01), Lang et al.
patent: 2005/0185144 (2005-08-01), Imahase et al.
Birch & Stewart Kolasch & Birch, LLP
LG Electronics Inc.
Perkey W. B.
Sever Andrew
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