| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact optical device using a polymer actuator as a driving part, capable of accurately controlling displacement amount, and having simple constitution. <P>SOLUTION: An imaging unit 100 is equipped with: a lens group 146 forming the optical image of a subject; a moving lens frame 140 holding the lens group 146; guide shafts 131 and 132 supporting the moving lens frame 140 movably; a fixed lens frame 110 and a cover member 120 holding the guide shafts 131 and 132; a coil spring 148 energizing the moving lens frame 140 toward the cover member 120; the polymer actuator 150 moving the moving lens frame 140 toward the fixed lens frame 110; an imaging device 182; and a base plate 180 holding the imaging device 182. The moving lens frame 140 has a sleeve part 141 to which the guide shaft 131 is fit and a U-shaped groove 142 which receives the guide shaft 132, and is arranged nearer to the side of the imaging device 182 than the polymer actuator 150. <P>COPYRIGHT: (C)2007,JPO&INPIT |
