| 摘要 |
Light outputted from a laser light source (12) of an image generating section (11) is two-dimensionally deflected and permitted to perform scanning by means of a reflecting surface (13a) of a deflecting device (13), diffused by means of a diffusion unit (14), and then diffracted and reflected by an HOE (23) of an eyepiece optical system (4), and guided to an optical pupil (E). Deterioration of qualities of an observing image can be eliminated by setting the optical pupil (E) and the reflecting surface (13a) of the deflecting device (13) to have an optically conjugated positional relationship. Furthermore, since a prescribed conditional equation is satisfied and the diffusion unit (14) has positive power, even when the optical pupil (E) and reflecting surface (13a) of the deflecting device (13) are set to have the conjugated positional relationship, the distance between the reflecting surface (13a) and the diffusion unit (14) can be short, and the image generation section (11) can be prevented from being large in size.
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