| 摘要 |
PROBLEM TO BE SOLVED: To easily attain reduction in the thickness and overall size of an image display apparatus by bending an optical path extending from a light source 11 to a reflection type display element 20 at an appropriate position. SOLUTION: A concave mirror 12 is provided to an opposite side to the light source 11 with respect to the optical path of light directed from the reflection type display element 20 to an eyepiece optical system 30. Light from the light source 11 is made incident on the reflection type display element 20 after its optical path is bent by the concave mirror 12. Video light from the reflection type display element 20 is made incident on the eyepiece optical system 30. Namely, by providing the above-mentioned concave mirror 12, a layout in which the light directed from the light source 11 to the concave mirror 12 and the light directed from the reflection type display element 20 to the eyepiece optical system 30 are intersected by each other is obtained. Therefore, this allows the light source 11, the concave mirror 12 and the reflection type display element 20 to be collectively arranged in compactness adjacent to the eyepiece optical system 30 without increasing the power of an illumination optical system 10. COPYRIGHT: (C)2007,JPO&INPIT
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