Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Reexamination Certificate
2008-06-09
2010-06-08
Choi, William C (Department: 2873)
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
C359S630000
Reexamination Certificate
active
07733572
ABSTRACT:
A present novel and non-trivial system, apparatus, and method for employing a catadioptric optical system in a Head-Up Display (“HUD”) system are disclosed. A catadioptric optical module is configured to produce a large image size within a small space envelope by folding the optical path back through module and separating the paths by use of a beam splitter. Such module comprised of a beam splitter, collimating mirror, and correcting lens produces collimated beams of light from an image source providing either polarized or non-polarized beams of light. If polarized beams are provided, the module includes a quarter-wave retarder, and the configuration of the module permits the image source to provide either s-polarized or p-polarized beams. A combiner arm assembly comprising of at least one combiner receives the collimated beams, where the employment of a plurality of combiners extends the relatively small instantaneous field of view.
REFERENCES:
patent: 2141884 (1938-12-01), Sonnefeld
patent: 4082432 (1978-04-01), Kirschner
patent: 4178074 (1979-12-01), Heller
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patent: 5903395 (1999-05-01), Rallison et al.
Brown Robert D.
Jopes Kevin E.
Quast Gerhardt A.
Stahl Kurt A.
Wood Robert B.
Barbieri Daniel M.
Choi William C
Evans Matthew J.
Rockwell Collins, Inc.
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