| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical scanner capable of restraining the curve of a scanning line caused by an error in the arrangement of a single lens which is an imaging optical system to be very small, and to provide an imaging device using the optical scanner. SOLUTION: In this optical scanner, the single lens is used as the imaging optical system, and the cross-sectional shape in the main scanning direction of an emitting surface is a circular arc; and power in the subscanning direction is nearly concentrated on the emitting surface, whose cross sectional shape in the main scanning direction is the circular arc, and the shape (curvature) of the circular arc in the main scanning direction is decided, so that magnification in the subscanning direction is fixed.
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