| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an oscillation light output circuit of an optical pickup apparatus wherein adjustment is easy, man-hour is unnecessary and deterioration of a semiconductor laser is not generated. <P>SOLUTION: The optical pickup apparatus is provided with a variable resistance circuit 7 wherein an oscillation light output adjustor adjusting target oscillation light output of an APC (Automatic Power Control) circuit 5 controlling oscillation light output of the semiconductor laser 1 is constituted of a plurality of fixed resistors and resistance switching switches. By this constitution, variation of adjustment man-hour due to fluctuation of the semiconductor laser can be suppressed without generating overcurrent deterioration of the semiconductor laser by mistake of adjustment of a variable resistance. <P>COPYRIGHT: (C)2008,JPO&INPIT |
