| 摘要 |
PROBLEM TO BE SOLVED: To obtain an objective lens actuator that collects tilts in radial and tangential directions of a lens holder assembly upon change of atmosphere temperature. SOLUTION: The objective lens actuator includes a base 2 having a short side raised part 31, a PCB 5 fixed to the short side raised part 31, a gel holder 4, a plurality of wires 6 fixed to the PCB 5, a lens holder assembly 8 to which the other ends of the wires 6 are fixed, and a driving mechanism driving the lens holder assembly 8. The fixed surface of the perpendicular raised part 31 and the PCB 5 is located midway in the longitudinal direction of the PCB 5. Wires 6 are fixed to a non-fixed part of the PCB 5. The gel holder 4 has protrusions 41, 42, 43 and 44 to be brought into contact with the non-fixed part. The protrusion parts 41, 42, 43 and 44 are made of a material having a thermal expansion coefficient higher than that of the fixed surface of the PCB 5. COPYRIGHT: (C)2011,JPO&INPIT |
