| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical pickup that achieves tracking control or focusing control with higher accuracy even when a light source and a photodetector are relatively displaced due to changes in environmental temperature and aging degradation, or the like. <P>SOLUTION: The optical pickup includes: a base material; a light source that is fixed to the base material and that emits a laser beam; an objective lens that focuses the laser beam on an optical disk; the photodetector that is fixed to the base member and detects the laser beam reflected by the optical disc; a fixing means that fixes the light source and/or the photodetector to the base member; and a light shielding part that blocks the central part of the laser beam in a round shape in a light path from the light source to the photodetector. <P>COPYRIGHT: (C)2011,JPO&INPIT |
