![Optical head device and optical information processor](/abs-image/US/2009/02/26/US20090052304A1/abs.jpg.150x150.jpg)
基本信息:
- 专利标题: Optical head device and optical information processor
- 专利标题(中):光头设备和光信息处理器
- 申请号:US11918426 申请日:2006-04-10
- 公开(公告)号:US20090052304A1 公开(公告)日:2009-02-26
- 发明人: Tatsuo Itoh , Teruhiro Shiono , Seiji Nishino
- 申请人: Tatsuo Itoh , Teruhiro Shiono , Seiji Nishino
- 优先权: JP2005-116836 20050414
- 国际申请: PCT/JP2006/307551 WO 20060410
- 主分类号: G11B7/135
- IPC分类号: G11B7/135
摘要:
A laser beam 32 reflected by an information layer of a multilayer optical disc 26 is reflected and split by reflecting surfaces 31a′, 31b, 31c and 31d to be incident on a photodetector element 36 as laser beams 33, 34 and 35. The laser beam 34 is collected on a light receiving region 38 for RF detection to generate an RF signal. The laser beams 33, 35 are incident on light receiving regions 37a, 37b for focus detection, and a focus error signal is generated by an SSD method. A laser beam 65 reflected by an information layer adjacent to the above information layer partially transmits through the reflecting surface 31a′ to be imaged on a light receiving region 66 for tracking detection, and a tracking error signal is generated.
摘要(中):
由多层光盘26的信息层反射的激光束32被作为激光束33,34,35的入射到光电检测元件36的反射面31a',31b,31c,31d反射并分割。激光束 34被收集在用于RF检测的光接收区域38上以产生RF信号。 激光束33,35入射到受光区域37a,37b上进行焦点检测,通过SSD方法产生聚焦误差信号。 由与上述信息层相邻的信息层反射的激光束65通过反射面31a'进行部分透射,以被成像在用于跟踪检测的光接收区域66上,并产生跟踪误差信号。
公开/授权文献:
- US07787347B2 Optical head device and optical information processor 公开/授权日:2010-08-31
IPC结构图谱:
G | 物理 |
--G11 | 信息存储 |
----G11B | 基于记录载体和换能器之间的相对运动而实现的信息存储 |
------G11B7/00 | 用光学方法,例如,用光辐射的热射束记录用低功率光束重现的;为此所用的记录载体 |
--------G11B7/002 | .按载体形状区分的记录、重现或抹除系统 |
----------G11B7/135 | ..将光束从光源引导到记录载体上去或从记录载体引导到检测器上去的装置 |