发明名称 |
OPTICAL PICKUP DEVICE AND OPTICAL DISK APPARATUS |
摘要 |
A half-wave plate is attached to a lens holder holding a collimator lens, and a servo operation to the collimator lens and insertion and retraction of the half-wave plate in and from an optical path of a laser beam are performed by a common actuator. When the lens holder is moved to a servo position, the half-wave plate is inserted in and retracted from the optical path of the laser beam. Therefore, the laser beam is formed in S-polarized light or P-polarized light with respect to a polarization beam splitter, and the laser beam is guided to a first objective lens or a second objective lens.
|
申请公布号 |
US2008186834(A1) |
申请公布日期 |
2008.08.07 |
申请号 |
US20080024450 |
申请日期 |
2008.02.01 |
申请人 |
SANYO ELECTRIC CO., LTD.;SANYO OPTEC DESIGN CO., LTD. |
发明人 |
KANO YASUYUKI;NAGATOMI KENJI |
分类号 |
G11B7/00 |
主分类号 |
G11B7/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|