| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a position adjustment device for a light receiving and emitting unit adjusting the position of the light receiving and emitting unit so that a light ray flux having the maximum light intensity among the light emitted from a light source is positioned at the center in the sectional surface of the light ray flux detected with a light receiving element when the position of the light receiving and emitting unit of an optical pickup device in which the light source and the light receiving element are integrally formed is adjusted, and to provide a position adjustment method and the optical pickup device. <P>SOLUTION: The position adjustment device 10 for the light receiving and emitting unit 11 includes a displacement means 16 changing the relative position of the light receiving and emitting unit 11, a semi-transmitting and semi-reflecting mirror 18 reflecting the light ray flux transmitted through a collimate lens 12, and a control means 17 controlling the displacement means 16 on the basis of a signal from the light receiving element 13. The position adjustment device further includes a diaphragm means 27 including a transmitting region 29, wherein the shape of the transmitting region 29 is rotation symmetrical about an optical axis L10 of the collimate lens when viewed in the optical axis direction Z of the collimate lens. <P>COPYRIGHT: (C)2008,JPO&INPIT |
