| 摘要 |
An illuminating optical device includes a light source including two light emitting points which are symmetric with respect to an optical axis of the illuminating optical device, a first concave reflection mirror plane arranged behind the light source and symmetrically to the optical axis in order to form an image of the light source at a predetermined position of an illuminated area, and a second concave reflection mirror plane arranged more closely to the illuminated area than the first concave reflection plane and symmetrically to the optical axis in order to direct the light beam to the light emitting points of the light source.
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