Small light weight head-mounted or face-mounted image display ap

Details Small light weight head-mounted or face-mounted image display ap Small light weight head-mounted or face-mounted image display ap

1995-12-12

1998-03-10

Nelms, David C.

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

057268070

ABSTRACT:
An image display apparatus, e.g. a head-mounted image display apparatus, which is capable of satisfactorily correcting field curvature and other aberrations in an optical system simultaneously, and which enables even an image of high resolution to be sufficiently clearly observed, without forming an intermediate image. The apparatus has an image display device (6) for displaying an image, and an optical system for projecting an image formed by the image display device (6) without forming an intermediate image and for leading the projected image to an observer's eyeball (1). The optical system includes at least one concave mirror (4) having a rotationally asymmetric reflecting surface which is concave toward the observer's eyeball and decentered with respect to an optical axis, and at least one optical element (9) of positive refractive power which is disposed between the concave mirror (4) and the image display device (6).

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