发明授权
- 专利标题: Optical pickup device
- 专利标题(中): 光学拾取装置
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申请号: US10483859申请日: 2002-08-13
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公开(公告)号: US06937381B2公开(公告)日: 2005-08-30
- 发明人: Kazuya Kitamura , Yukio Kurata , Tetsuo Iwaki
- 申请人: Kazuya Kitamura , Yukio Kurata , Tetsuo Iwaki
- 申请人地址: JP Osaka
- 专利权人: Sharp Kabushiki Kaisha
- 当前专利权人: Sharp Kabushiki Kaisha
- 当前专利权人地址: JP Osaka
- 代理机构: Edwards & Angell, LLP
- 代理商 David G. Conlin; Peter J. Manus
- 优先权: JP2001-253735 20010824
- 国际申请: PCT/JP02/08265 WO 20020813
- 国际公布: WO03/09861 WO 20031127
- 主分类号: G11B7/1369
- IPC分类号: G11B7/1369 ; G02F1/10 ; G11B7/00 ; G11B7/135
摘要:
An optical pickup device which includes (A) a light source, and (B) an objective lens and an aberration correcting optical system which are located in a light path from the light source to an optical recording medium is so arranged that the aberration correcting optical system imparts a phase distribution to luminous flux which transmits the aberration correcting optical system, so as to correct a predetermined aberration; and an amount of phase of the aberration correcting optical system when correcting the aberration is set in such a manner that the aberration correcting optical system imparts a larger amount of phase at a position farther from a point where the aberration correcting optical system crosses an optical axis of light emitted from the light source. With this, it is possible to increase a tolerance for the center misalignment of the objective lens so as to reduce aberration caused by the center misalignment.
公开/授权文献
- US20040169908A1 Optical pickup device 公开/授权日:2004-09-02
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