| 摘要 |
A compact and lightweight head- or face-mounted image display apparatus in which curvature of field is reduced to improve visibility without using a relay optical system or a prism. The image display apparatus has an image display device (1) and an optical system for leading an image displayed by the image display device (1) to an observer's eyeball (5) without effecting image formation on the way to the observer's eyeball (5). The image display device (1) and the optical system are retained on an observer's head or face by a retaining device. Light rays from the image display device (1) are reflected by a semitransparent surface (2) and then reflected by a reflecting surface (4) of a back-coated mirror (3). Thereafter, the light rays pass through the semitransparent surface (2) to enter the observer's pupil (5).
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