Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1998-02-04
1999-11-23
Epps, Georgia
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359630, 359634, G02B 2714
Patent
active
059910844
ABSTRACT:
A compact virtual image display system is provided which includes a microdisplay; a first magnification optic consisting of three surfaces: a display input surface; a reflective/transmissive surface, and a reflective first magnification element surface; and a second magnification optic. Light forming the source object enters the first magnification optic at the display input surface. The light travels within the first magnification optic such that it is projected to an area on the reflective.backslash.transmissive surface that is at least partially within the full field of view provided by the second magnification optic. The light is directed to the reflective/transmissive surface at a first angle of incidence .theta..sub.SO relative to the reflective/transmissive surface such that the light is internally reflected by the reflective/transmissive surface and directed to the reflective first magnification element surface. The first magnification element surface internally reflects the light corresponding to the source object as a magnified virtual image. The magnified virtual image is then is conveyed within the first magnification optic back to the reflective/transmissive surface at a second angle of incidence .theta..sub.MVI relative to the reflective/transmissive surface such that the light is transmitted by the reflective/transmissive surface out of the first magnification optic. The second magnification optic is positioned to receive the magnified virtual image transmitted from the first magnification optic and transmit a compound magnified virtual image of the magnified virtual image of the source object to the observer.
REFERENCES:
patent: 5530586 (1996-06-01), Yasugski
patent: 5587836 (1996-12-01), Takahashi et al.
patent: 5764403 (1998-06-01), Downing
patent: 5771124 (1998-06-01), Kintz et al.
patent: 5870068 (1999-02-01), Hildebrand et al.
Hildebrand Alfred P.
Kintz Gregory J.
Epps Georgia
Inviso
Lucas Michael A
Weitz David J.
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