Xi'an Institute of Optics and Precision Mechanics,CAS
Optical information device and tracking method | |
其他题名 | Optical information device and tracking method |
TAKAOKA, TATSUYA; WADA, HIDENORI; SANO, KOUSEI; MATSUZAKI, KEIICHI | |
2012-09-27 | |
专利权人 | PANASONIC CORPORATION |
公开日期 | 2012-09-27 |
授权国家 | 世界知识产权组织 |
专利类型 | 发明申请 |
摘要 | According to the present invention a plurality of metal antennas (108b, 108c) onto which light is irradiated from semiconductor laser elements (107b, 107c) mutually operate with a disc (101) such that a resonance state changes in accordance with the distance from a track. A slider (104) arranges the plurality of metal antennas (108b, 108c) by displacing the position of the metal antennas in a direction orthogonal to the track while constantly fixing and maintaining the distance between the plurality of metal antennas (108b, 108c). Light-receiving elements (110b, 110c) separately detect each change in the resonance state of the plurality of metal antennas (108b, 108c). An operation amplifier (111) operates a tracking signal on the basis of the detected change in the resonance state. An actuator (106) moves the slider (104) in the direction orthogonal to the track in accordance with the operated tracking signal. |
其他摘要 | 根据本发明,从半导体激光器元件(107b,107c)照射光的多个金属天线(108b,108c)与盘(101)相互操作,使得谐振状态根据与a的距离而变化。跟踪。滑块(104)通过在垂直于轨道的方向上移动金属天线的位置来布置多个金属天线(108b,108c),同时恒定地固定和保持多个金属天线(108b,108c)之间的距离。光接收元件(110b,110c)分别检测多个金属天线(108b,108c)的谐振状态的每个变化。运算放大器(111)基于检测到的谐振状态的变化来操作跟踪信号。致动器(106)根据操作的跟踪信号在与轨道正交的方向上移动滑块(104)。 |
主权项 | - |
申请日期 | 2012-03-21 |
专利号 | WO2012127854A1 |
专利状态 | 未确认 |
申请号 | PCT/JP2012/001918 |
公开(公告)号 | WO2012127854A1 |
IPC 分类号 | G11B7/09 | G11B7/135 |
专利代理人 | KOTANI, ETSUJI |
代理机构 | - |
文献类型 | 专利 |
条目标识符 | http://ir.opt.ac.cn/handle/181661/58766 |
专题 | 半导体激光器专利数据库 |
作者单位 | PANASONIC CORPORATION |
推荐引用方式 GB/T 7714 | TAKAOKA, TATSUYA,WADA, HIDENORI,SANO, KOUSEI,et al. Optical information device and tracking method. WO2012127854A1[P]. 2012-09-27. |
条目包含的文件 | 条目无相关文件。 |
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