Image display apparatus

Details Image display apparatus Image display apparatus

1994-02-28

1996-07-23

Epps, Georgia Y.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359631, 345 7, 345 8, G02B 2710, G09G 500

Patent

active

055395783

ABSTRACT:
An image display apparatus designed so that the field angle for observation can be widened without causing the substrate of an image display device to interfere with the observer's head and without increasing the overall size of the apparatus. The apparatus includes a two-dimensional image display device (6), an optical path splitting device (4), and a concave ocular mirror (5). The image display device (6) is used as an object point of the concave ocular mirror (5), and the object point is projected in the air as an enlarged image for an observer (1) without effecting image formation in the optical path. In the image display apparatus, either or both the optical path splitting device (4) and the concave ocular mirror (5) are decentered so that the display center (7) of the two-dimensional image display device (6) can be shifted away from the observer's head with respect to a reference axis (8) which perpendicularly intersects the observer's visual axis (3) lying when he or she sees forward.

REFERENCES:
patent: 4874214 (1989-10-01), Cheysson et al.
patent: 5189452 (1993-02-01), Hodson
patent: 5200856 (1993-04-01), Beaussant
patent: 5309169 (1994-05-01), Lippert
patent: 5408346 (1995-04-01), Trissel

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