| 摘要 |
An image display apparatus which has a stable field angle independently of each individual observer and the observer's eye point, and which is capable of correcting distortion of an observation image, or which allows the corners of an image display device to be relatively bright. The apparatus has an image display device (3), a device (4) for illuminating it, and an ocular optical system (2) for leading the image of the image display device (3) to an observer's eyeball (1). A field stop (5) is provided in the ocular optical system (2) or between the ocular optical system (2) and the image display device (3), and a light-blocking device (6) is provided between the image display device (3) and the illuminating device (4) such that the distance from the field stop (5) to the image display device (3) and the distance from the image display device (3) to the light-blocking device (6) are approximately equal to each other. Thus, the size of the observation image area determined by the field stop (5) and the size of the observation image area determined by the light-blocking device (6) are made approximately equal to each other, thereby obtaining a stable field angle independently of each individual observer and the observer's eye point.
|
