Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1994-12-23
1997-09-02
Epps, Georgia Y.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359633, G02B 2714
Patent
active
056638337
ABSTRACT:
An image display apparatus comprises an image display device for emitting a light beam to display an image, and an observation optical system for guiding the light beam from the image display device to the pupil of an observer. The observation optical system has at least a concave, reflective surface and a convex, reflective surface in order from the pupil side of the observer along an optical axis of the light beam directed from the image display device to the pupil. The concave, reflective surface is located near the pupil.
REFERENCES:
patent: 3697154 (1972-10-01), Johnson
patent: 5184250 (1993-02-01), Lacroix
patent: 5384654 (1995-01-01), Iba
Johnson, Barry, R., Wide field of view three-mirror telescopes having a common optical axis, Optical Engineering, vol. 27, No. 2, Dec. 1988, Bellingham, US, pp. 1046-1050.
Akiyama Takeshi
Morishima Hideki
Nanba Norihiro
Tanaka Tsunefumi
Canon Kabushiki Kaisha
Cornely John P.
Epps Georgia Y.
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