Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1996-08-20
1998-09-22
Font, Frank G.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359631, G02B 2714, G02B 2712
Patent
active
058123237
ABSTRACT:
An image display apparatus which enables observation of a clear image at a wide field angle with substantially no reduction in the brightness of the observation image, and which is extremely small in size and light in weight and hence unlikely to cause the observer to be fatigued. The image display apparatus includes an image display device (6) for displaying an image, and an ocular optical system (7) for projecting the image displayed by the image display device (6) and for leading the projected image to an observer's eyeball (1). The ocular optical system (7) has at least three surfaces, and a space formed by the at least three surfaces is filled with a medium having a refractive index larger than 1. The at least three surfaces are, in the order from the observer's eyeball (1) toward the image display device (6), a first surface (3) which is a refracting surface, a second surface (4) which is decentered or tilted with respect to an observer's visual axis (2) and serves as both an internally reflecting surface and a refracting surface, and a third surface (5) which is a reflecting surface of positive power facing the second surface (4). Internal reflection at the second surface (4) is total reflection.
REFERENCES:
patent: Re27356 (1972-05-01), La Russa
patent: 3810221 (1974-05-01), Plummer
patent: 3836931 (1974-09-01), Plummer
patent: 4026641 (1977-05-01), Bosserman et al.
patent: 4322135 (1982-03-01), Freeman
patent: 4669810 (1987-06-01), Wood
patent: 5274406 (1993-12-01), Tejima et al.
patent: 5539578 (1996-07-01), Togino et al.
patent: 5546227 (1996-08-01), Yasugaki et al.
patent: 5596433 (1997-01-01), Konuma
Font Frank G.
Olympus Optical Co,. Ltd.
Stafira Michael P.
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