| 摘要 |
<p>A visual display device (1) comprises a video display element (3), a projection optical system (4) for projecting a video displayed on the video display element (3), an eyepiece optical system (5) using the video projected by the projection optical system (4) as a video from far and having a positive reflective power, and a cylindrical or conical diffusion surface (11) disposed in the neighborhood of the video projected by the projection optical system (4). In the visual display device (1), the video projected by the projection optical system (4) is disposed so as to draw an arc at an arbitrary position within a surface orthogonal to the optical axis (2) of the projection optical system (4).</p> |
