Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1996-07-12
1998-05-05
Epps, Georgia V.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359630, G02B 2714
Patent
active
057483787
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. The image display apparatus has an image display device (7) and an ocular optical system (8) for projecting the image of the image display device (7) and leading the projected image to an observer's eyeball (1). The ocular optical system (8) has at least three optical surfaces, and a space formed by these surfaces is filled with a medium having a refractive index larger than 1. The three optical surfaces are defined as a first surface (3), a second surface (4), and a third surface (5), respectively, in the order in which light rays pass in backward ray tracing from the observer's eyeball (1) to the image display device (7). The optical surfaces are disposed such that light rays from the observer's eyeball (1) pass through the first surface (3) and are reflected by the second surface (4) and further reflected by the third surface (5), which is a reflecting surface having positive power, and the light rays reflected by the third surface (5) are reflected by the first surface (3) and pass through the second surface (4) to reach the image display device (7).
REFERENCES:
patent: Re27356 (1972-05-01), La Russa
patent: 4026641 (1977-05-01), Bosserman et al.
patent: 4081209 (1978-03-01), Heller et al.
patent: 4322135 (1982-03-01), Freeman
patent: 4669810 (1987-06-01), Wood
patent: 4969724 (1990-11-01), Ellis
patent: 5000544 (1991-03-01), Staveley
patent: 5050962 (1991-09-01), Monnier et al.
patent: 5134521 (1992-07-01), Lacroix et al.
patent: 5459612 (1995-10-01), Ingleton
patent: 5483307 (1996-01-01), Anderson
patent: 5506728 (1996-04-01), Edwards et al.
Takahashi Koichi
Togino Takayoshi
Epps Georgia V.
Mack Ricky
Olympus Optical Co,. Ltd.
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