发明名称 |
OPTIC PICKUP DEVICE AND OPTIC DISC PLAYER |
摘要 |
<p>A small size, high performance optical pickup device using a light reception/emission element (laser coupler) and more particularly, an optical pickup device which is capable of excellent recording and reproduction for a magnetic optical recording medium. A prism disposed over optical detectors is made of double refractive crystal material. An optical detector for receiving extraordinary ray is formed at a position laterally deviated corresponding to so-called walk-off of the extraordinary ray. Tracking error signal is detected depending on a distribution of intensities of spots formed by reflective beams on respective optical detectors.</p> |
申请公布号 |
HK1010270(A1) |
申请公布日期 |
2004.06.04 |
申请号 |
HK19980111183 |
申请日期 |
1998.10.09 |
申请人 |
SONY CORPORATION |
发明人 |
NORIAKI NISHI;KIMIHIRO SAITO;KAZUYOSHI HORIE;YASUO SASAKI;KENJI ARAKI;KAZUHIKO OKAMATSU |
分类号 |
G11B7/09;G11B7/12;G11B7/13;G11B7/135;G11B11/105;(IPC1-7):G11B |
主分类号 |
G11B7/09 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|