G - Physics – 02 – B
Patent
G - Physics
02
B
88/1, 375/39
G02B 27/00 (2006.01) G02B 5/30 (2006.01) G02B 27/01 (2006.01) G02B 27/10 (2006.01) G09B 9/32 (2006.01)
Patent
CA 1313914
OPTICAL COLLIMATING APPARATUS ABSTRACT OF THE DISCLOSURE An optical collimating apparatus employs a semi-reflective concave mirror and cholesteric liquid crystal element. In one embodiment, the optical col- limating apparatus is used as a heads-up display device. Images in the line of sight of an observer substantially pass through a transmitter/combiner, semi-reflective concave mirror, and cholesteric liquid crystal element to an observer. Images generated by an image source are focussed on the transmitter/combiner such that the transmitter/combiner reflects the images into the line of sight of the observer. The generated images are transmitted by the primarily transmissive (convex) side of the semi-reflective concave mirror to the cholesteric liquid crystal element. The cholesteric liquid crystal element reflects the generated images back toward the primarily reflective (concave) side of the semi- reflective concave mirror, which in turn reflects the images back toward the cholesteric liquid crystal ele- ment, which transmits the generated images to the ob- server. In an alternate embodiment, such as in a flight simulator or similar device, an image source projects images upon the primarily transmissive (convex) side of a semi-reflective concave mirror which transmits the images to a cholesteric liquid crystal element. The images are reflected by the cholesteric liquid crystal element back toward the primarily reflective (concave) side of the semi-reflective concave mirror. The images are then reflected by the semi-reflective concave mirror back toward the cholesteric liquid crystal element which transmits the images to the observer. K3/10530-11
573542
Berman Arthur Louis
Melzer James Edward
Kaiser Aerospace And Electronics Corporation
Smart & Biggar
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