US 6,982,829 B1 | ||
Prism assembly with cholesteric reflectors | ||
Arthur Berman, San Jose, Calif. (US) | ||
Assigned to LightMaster Systems, Inc, Cupertino, Calif. (US) | ||
Filed on Aug. 22, 2003, as Appl. No. 10/646,291. | ||
Claims priority of provisional application 60/405462, filed on Aug. 23, 2002. | ||
Int. Cl. G02B 5/30 (2006.01) |
U.S. Cl. 359—495 | 8 Claims |
1. A prism assembly, comprising:
an input beam splitter comprising an input face, a first exit face, and a second exit face;
a processing beam splitter comprising an input face and an exit face, wherein the input face of the processing beam splitter
is coupled to the first exit face of the input beam splitter;
a cholesteric based beam splitter comprising an input face and an exit face, wherein the input face of the cholesteric based
beam splitter is coupled to the second exit face of the input beam splitter; and
an output beam splitter having a first input face, a second input face, and an output face, wherein the first input face of
the output beam splitter is coupled to the exit face of the processing beam splitter and the second input face of the output
beam splitter is coupled to the exit face of the cholesteric beam splitter
wherein:
the cholesteric beam splitter comprises a dual cholesteric layer configured to,
direct a first part of a light beam entering the input face of the cholesteric based beam splitter to a first processing face
of the cholesteric beam splitter,
direct a second part of the light beam entering the input face of the cholesteric based beam splitter to a second processing
face of the cholesteric beam splitter, and
direct light beams emanating from the first and second processing faces to the exit face of the cholesteric based beam splitter.
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