| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical scanning device with which a large rotation angle is obtained and the rotation angle of a mirror surface is specified linearly and of which outline shape is compact.SOLUTION: The optical scanning device includes: a first expansion mechanism 25a and a second expansion mechanism 25b of an L-shape; a rotation block 6 which is supported by their first point 47a and second point 47b of action and includes a scanning mirror 9; and piezoelectric elements arranged in the longitudinal directions of first and second displacement expansion arms 5a, 5b of the first and second expansion mechanisms 25a, 25b. A tension spring 8 is provided to the other end 47c of the second displacement expansion arm 5b, and the tip of the tension spring 8 is the second point 47b of action. By rotating so that the first expansion mechanism 25a and the second expansion mechanism 25b open, the rotation block 6 is rotated. |
