| 摘要 |
PURPOSE:To improve the focusing and tracking characteristics with an easy assembly and adjustment and at the same time to increase the lifetime of the titled controller, by supporting a lens barrel with its rotary center formed with a shaft and a bearing at the position of an optical axis by means of an elastic member with one of its ends fixed to the main body of said controller. CONSTITUTION:A lens barrel 32 stores and objective lens 31. A lens barrel holder 34 holds rockably the barrel 32 in the direction orthogonal to an optical axis via a rotary mechanism including a shaft 35 and a bearing 33. A slide shaft 43 slides and guides the holder 34 in the direction of the optical axis. An elastic support member 51 supports the barrel 32 at the position of the optical axis with one of its ends fixed to the barrel 32 and the other end fixed to a support ring 52 respectively. Then the barrel 32 is rocked by tracking magnetic circuits 46a and 46b, and the holder 34 is moved in the direction of the optical axis by a focusing magnetic circuit 38. |
