| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact optical device having simple constitution for making an optical element move. 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 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 and a U-shaped groove 142 for receiving the guide shaft 132. The point of application of the polymer actuator 150 pressing the moving lens frame 140 is positioned nearer to the guide shaft 131 than to the support point of the polymer actuator 150. COPYRIGHT: (C)2007,JPO&INPIT
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