| 摘要 |
<P>PROBLEM TO BE SOLVED: To secure the degree of freedom in optical setting of the light intensity distribution and the polarization direction of emitted light by avoiding performance deterioration caused by the accumulation of errors in the mutual positions of the respective components in an optical device wherein a semiconductor laser and a light receiving element substrate are integrated integrally. <P>SOLUTION: The optical device includes a sub-mount 2 mounting first and second semiconductor lasers 1a and 1b and having an onboard part for the semiconductor lasers and an optical path conversion mirror integrated with each other, and a light receiving element 3 arranged on a light receiving element substrate 3 and having, on the light receiving element substrate, first and second light receiving regions 11 separated from each other by at least one parting line. In the optical device, the light gravity center of an optical spot, which is formed on the light receiving element by homeward flux of light emitted from the first semiconductor laser and reflected by an optical disk 55, and the light gravity center of an optical spot, which is formed on the light receiving element by homeward flux of light emitted from the second semiconductor laser and reflected by the optical disk 55 are positioned on the identical parting line. <P>COPYRIGHT: (C)2011,JPO&INPIT |
