| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical device that excellently corrects curvature of field, and attains both of light utilization efficiency and image formation performance.SOLUTION: An optical device comprises: a light source 101 that has a plurality of light emitting points arrayed in a first direction (Y-direction); and two lens arrays 103 that have a plurality of image formation parts 102 arrayed in the first direction, respectively, in which the plurality of light emitting points is formed into an erected image on a light reception surface 106 by each of the plurality of image formation parts 102. In a second direction (Z-direction) perpendicular to an optical axis direction (X-direction) of the image formation part 102 and different from the first direction, two lens arrays 103 are configured to be arrayed so that each of the plurality of light emitting points is located between respective optical axis rows, and in the optical axis direction, respective image surfaces of the plurality of image formation parts 102 are configured to be located on a farther side from the light source 101 than the light reception surface 106 on an axis, and in a most off-axis, respective image surfaces thereof are configured to be located on a side closer to the light source 101 than the light reception surface 106 . |
