| 摘要 |
PROBLEM TO BE SOLVED: To provide a video display device which is small and light and in which diopter adjusting is easy, which can be sued with spectacles put and can be mounted on thee head or the face. SOLUTION: In a video display device equipped with a video display element 1 which displays videos, a half mirror 2 inclined and disposed on an intersection point of the optical axis of the video display element 1 and the observer's visual axis in order to guide video luminous flux formed by the video display element 1 to the observer's eyeball 5, and an enlarging reflection mirror 3 which has positive power and is disposed to face the video display element 1 through the half mirror 2, an angleθformed by the normal of the half mirror 2 and the optical axis of the video display element 1 is set smaller thanπ/4.
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