发明名称 |
Optical pick-up apparatus |
摘要 |
A compatible optical pick-up apparatus, which records to and/or reproduce from both digital versatile disc (DVD)-type optical disks and compact disc (CD)-type optical disks for improving a signal regeneration capacity and a tracking capacity in operation at a high temperature. A polarized hologram of the optical pick-up apparatus is divided into six diffraction regions. The rays of a first light diffracted at the first and second diffraction regions are separately received by divided parts of a first bisected light-receiving portion of a photodetector.
|
申请公布号 |
US7345820(B2) |
申请公布日期 |
2008.03.18 |
申请号 |
US20050111988 |
申请日期 |
2005.04.22 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
PARK SOO HAN;PARK SEONG SU;HONG JUNG WOO;KIM BONG GI |
分类号 |
G02B5/18;G11B7/00;G11B7/13;G11B7/135 |
主分类号 |
G02B5/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|