| 摘要 |
PROBLEM TO BE SOLVED: To observe a light beam from one image display element with both eyes by guiding it to an optical system for a left eye and an optical system for a right eye in an HMD for observing a video in a state where it is attached to an observer's head or face. SOLUTION: An angleαformed by a reference axis light beam with the normal of the image display element and an angleβformed by the reference axis light beam with the normal of an exit pupil satisfy [¾α¾≠0, ¾β¾≠0]. When the length of perpendiculars drawn from the centers of the exit pupils of two observation optical systems to the normal cross section of the center of the image display element is defined as EW, it satisfies [27≤EW≤35]. COPYRIGHT: (C)2004,JPO
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