| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical device which adjusts astigmatic difference due to manufacturing error and can provide preferable imaging performance while securing optical efficiency.SOLUTION: An optical device includes: an imaging optical system provided with, in an optical axis direction, a plurality of lens arrays which contain a plurality of lens parts arrayed in a first direction vertical to the optical axis direction; a light source which contains a plurality of light emission points arrayed in the first direction; and first changing means which changes a first interval in the optical axis direction between the lens array closest to the light source of the plurality of lens arrays and the light source. Therein, the imaging optical system images the light source in erecting equal magnification in a first cross-section containing the optical axis direction and the first direction and images the light source in a second magnification different from the magnification in the first cross-section, in the second cross-section vertical to the first direction. |
