| Optical information device and tracking method | |
| TAKAOKA, TATSUYA; WADA, HIDENORI; SANO, KOUSEI; MATSUZAKI, KEIICHI | |
| 2012-09-27 | |
| 著作权人 | PANASONIC CORPORATION |
| 专利号 | WO2012127854A1 |
| 国家 | 世界知识产权组织 |
| 文献子类 | 发明申请 |
| 其他题名 | Optical information device and tracking method |
| 英文摘要 | 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. |
| 公开日期 | 2012-09-27 |
| 申请日期 | 2012-03-21 |
| 状态 | 未确认 |
| 内容类型 | 专利 |
| 源URL | [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. 2012-09-27. |
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