| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lens actuator which can be easily manufactured and wherein the highly accurate positioning of an objective lens and a diffraction element can be performed. <P>SOLUTION: The objective lens 2 and the diffraction element 3 are provided in a single lens holder 1 to be positioned and fixed so that the optical axis of the diffraction element 3 is inclined to the optical axis of the objective lens 2. Thereby, the highly accurate positioning of the objective lens 2 and the diffraction element 3 can be easily performed and optical disturbance caused by specular reflection can be further prevented. <P>COPYRIGHT: (C)2009,JPO&INPIT |
