US 6,982,830 B2 | ||
Polarization recovery system for projection displays | ||
Kenneth K. Li, Arcadia, Calif. (US) | ||
Assigned to Wavien, Inc., Santa Clarita, Calif. (US) | ||
Filed on Jan. 21, 2003, as Appl. No. 10/347,522. | ||
Application 10/347522 is a continuation of application No. 09/814970, filed on Mar. 23, 2001, granted, now 6,587,269. | ||
Claims priority of provisional application 60/227312, filed on Aug. 24, 2000. | ||
Claims priority of provisional application 60/246583, filed on Nov. 08, 2000. | ||
Prior Publication US 2003/0147137 A1, Aug. 07, 2003 | ||
This patent is subject to a terminal disclaimer. | ||
Int. Cl. G02B 27/28 (2006.01); G02B 5/30 (2006.01) |
U.S. Cl. 359—496 | 21 Claims |
1. A polarization recovery system comprising:
a light source that emits light energy;
a polarizing beam splitter positioned to receive a substantial portion of the light energy from the light source, the polarizing
beam splitter transmitting light energy of a first polarization type and reflecting light energy of a second polarization
type;
a polarization shifter positioned to receive and modify the polarization of a substantial portion of either the transmitted
or the reflected light energy; and
an output waveguide for integrating a substantial portion of both the transmitted light energy and the reflected light energy.
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