| 摘要 |
A micro-display (1) and a condenser lens (2) focusing an image of the micro-display onto retina of human eye are provided within a case (3). Then, a reflected light detecting means (4) for detecting brightness of reflected light reflected by human retina, which comprises a block where a light emitting section (41) and a light receiving section (42) are provided alternately is provided. A location adjusting means for moving, for example, the condenser lens held with coil (51) so that amount detected by this reflected light detecting means, for example, is maximized and adjusting the relation so that the location relationship between the micro-display and the condenser lens is optimized. As a result, a head mounted display can be obtained which is capable of observing without occurring any fatigue of eyes in the case where one has to recognize both of the outside world and the display approximately at the same time.
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