| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact optical device in which an optical element can be positioned with high accuracy. SOLUTION: An imaging unit 100 is equipped with a lens group 146 for forming the optical image of a subject; a moving lens frame 140 for holding the lens group 146; guide shafts 131 and 132 for movably supporting the moving lens frame 140; a fixed lens frame 110 and a cover member 120 for holding the guide shafts 131 and 132; a coil spring 148 for energizing the moving lens frame 140 toward the fixed lens frame 110; a polymer actuator 150 for moving the moving lens frame 140 toward the cover member 120; an imaging device 182; and a base plate 180 for holding the imaging device 182. The moving lens frame 140 has a sleeve part 141, in which the guide shaft 131 is fit, a U-shaped groove 142 for receiving the guide shaft 132, and a projecting part 144 projecting outward. The projecting part 144 of the moving lens frame 140 is located between positioning parts 111 and 112 for positioning the lens group 146. COPYRIGHT: (C)2007,JPO&INPIT
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