Apparatus for adding red light to a polarized light system

Details Apparatus for adding red light to a polarized light system Apparatus for adding red light to a polarized light system

2004-03-09

2008-12-23

Spector, David N (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

C359S506000

Reexamination Certificate

active

07468844

ABSTRACT:
An apparatus for adding red light to a polarized light system includes a first light source and a second light source. A polarizing beam splitter combines S-polarized-light from the first light source and P-polarized light from the second light source. A first multi-layer filter means rotates the polarization state of the green light from the first light source to the P-polarization state. A second multi-layer filter means rotates the first light source red light to the P-polarization state and rotates the second light source red light to the S-polarization state. Finally, a reflective cleanup polarizer reflects the P-polarized-light back to the respective first and second light source and passes the S-polarized-light.

REFERENCES:
patent: 5042921 (1991-08-01), Sato et al.
patent: 6409349 (2002-06-01), O'Connor
patent: 6623122 (2003-09-01), Yamazaki et al.
patent: 7070281 (2006-07-01), Kato
patent: 7360900 (2008-04-01), Sakata et al.
patent: 2002/0067468 (2002-06-01), O'Connor
patent: 2002/0154277 (2002-10-01), Mukawa et al.
patent: 2003/0156330 (2003-08-01), Edlinger et al.
International Search Report PCT/ISA/210 prepared for PCT/US2004/007104, Sep. 7, 2004.
Jianmin Chen et al: “40.4: Twp-Panel Architecture for Reflective LCD Projector” SID 01 Digest, May 2001, pp. 1084-1087, XP007007741 p. 1085, column 1, line 1—line 13.
Sharp G. et al.: “LCoS Projection Color Management Using Retarder Stack Technology” Displays, Elsevier Science Publishers BV., Barking,GB, vol. 23, No. 3, Jun. 2002, pp. 139-144, XP00435156 issn: 0141-9382 p. 141, Column 2, Line 14—p. 142, Column 1, Line 18; Figure 8RLAND abstract p. 2, paragraph 1—p. 6, last line: figures 1,2 p. 9, paragraph 2.

Affiliated with

Also associated with

Rating

Apparatus for adding red light to a polarized light system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for adding red light to a polarized light system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for adding red light to a polarized light system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4026547