| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical pickup device which can perform feedback control to a laser power source more properly than in a conventional manner. <P>SOLUTION: The optical pickup device 10 is provided with a semiconductor laser 11 which emits a laser beam for reading information from an optical disk, a half mirror 13 which separates the laser beam by transmitting and reflecting it, a photoelectric element 14 for detecting an LD light quantity which detects the laser beam separated from the laser beam before reaching the optical disk by the half mirror 13 for the feedback control of the semiconductor laser 11, and a detection photoelectric element 19 which detects the laser beam reflected by the optical disk. The detection photoelectric element 19 is tilted with respect to the state of detecting the laser beam reflected by the optical disk to the maximum so that the optical axis 10a of the laser beam reflected by the photoelectric element 19 itself and reflected by the half mirror 13 may be deviated from the photodetection part of the photoelectric element 14 for detecting the LD light quantity. <P>COPYRIGHT: (C)2008,JPO&INPIT |
