| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical head apparatus in which optical arrangement is contrived in order to suppress an influence of position deviation of a laser beam received by a photodetector unit for rotation deviation of a beam splitter. <P>SOLUTION: A first reflecting plane 5a which reflects laser beams emitted from laser light sources 1, 2 and guides them to a optical path proceeding to a recording medium is formed in a beam splitter 5, while a second reflecting plane 5b which branches an optical path of the laser beams reflected by the first reflecting plane 5a and an optical path guiding them to the photodetector unit 13 is formed in the beam splitter 5, and the laser light sources 1, 2 and the photodetector unit 13 are arranged so as to make the laser beams emitted from the laser light sources 1, 2 and the laser beam guided to the photodetector unit 13 of almost mutually parallel optical axis. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
