| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a semiconductor laser device capable of receiving both of ±primary lights diffracted by a diffraction element to use them as reproduction signals, and being miniaturized, and to provide an optical pickup and an information processing device including the same. <P>SOLUTION: The semiconductor laser device 10 includes a light source 14, a diffraction element 16, a light receiving element 17, and a reflection mirror 18. The diffraction element 16 diffracts light emitted from the light source 14 and reflected on the recording surface of a recording medium. The light receiving element 17 receives the light diffracted by the diffraction element 16. A reflection surface 19 is formed in the reflection mirror 18. The reflection surface 19 reflects a part of the light diffracted by the diffraction element 16. The reflection mirror 18 enters the light reflected on the reflection surface 19 to the light receiving element 17. The other part of the light diffracted by the diffraction element 16 directly enters the light receiving element 17. <P>COPYRIGHT: (C)2010,JPO&INPIT |
