Visual display apparatus

摘要

A visual display apparatus which enables the view angle for observation to be changed between two different levels with a simple arrangement by the observer's intention or according to the kind of image reproduced. The visual display apparatus has a device (5) for displaying an image, a relay optical system (4) for projecting the image displayed on the image display device (5) to form a first image, and an ocular optical system (2) for projecting the first image in an observer's eyeball. The relay optical system (4) has an optical system (42) which is movable along an optical axis and enables a magnification to be changed between two different levels by moving the movable optical system (42) along the optical axis. When one of magnifications of the movable optical system (42) is assumed to be beta , the other magnification is approximately 1/ beta .