发明授权
US08432781B2 Method and apparatus for reading from a near-field optical recording medium, and near-field lens for the apparatus
失效
用于从近场光学记录介质读取的方法和装置以及用于该装置的近场透镜
- 专利标题： Method and apparatus for reading from a near-field optical recording medium, and near-field lens for the apparatus
- 专利标题（中）： 用于从近场光学记录介质读取的方法和装置以及用于该装置的近场透镜
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申请号： US13517469申请日： 2010-12-07
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公开(公告)号： US08432781B2公开(公告)日： 2013-04-30
- 发明人: Stephan Knappmann , Frank Przygodda
- 申请人： Stephan Knappmann , Frank Przygodda
- 申请人地址： FR Issy les Moulineaux
- 专利权人： Thomson Licensing
- 当前专利权人： Thomson Licensing
- 当前专利权人地址： FR Issy les Moulineaux
- 代理商 Robert D. Shedd; Richard LaPeruta
- 优先权： EP09306296 20091221
- 国际申请： PCT/EP2010/069092 WO 20101207
- 国际公布： WO2011/076561 WO 20110630
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
A method and an apparatus for reading from a near-field optical recording medium are described. The apparatus includes: an optical system for generating a signal beam and a reference beam; a near-field lens for illuminating the signal beam onto the near-field optical recording medium, for collimating a reflected signal beam, and for reflecting the reference beam; and at least a first detector and a second detector for obtaining a homodyne detection signal from the reflected signal beam and the reflected reference beam.
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