| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact visual display device which has eye relief enabling a wide angle of view to be observed sharply as a distant image. SOLUTION: The visual display device 1 includes an image display element 3 and an ocular optical system 5 that allows a viewer to observe an image displayed on the image display element 3 as a virtual image in a remote location. The ocular optical system 5 has at least one reflection optical element 5a, at least one transmission optical element 5b, and a visual axis 101 including a central main light beam in the reverse ray trace of the ocular optical system 5 which is directed from the center of an entrance pupil E toward the reflection optical element 5a through the transmission optical element 5b. The number of times of image formation is different between in a first cross-section including the visual axis 101 and in a second cross-section which is perpendicular to the first cross-section and includes the visual axis 101. COPYRIGHT: (C)2011,JPO&INPIT
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