发明授权
US08233372B2 Optical system for compensating for coma aberration and/or spherical aberration in an optical pickup device and optical pickup device having the same
有权
用于补偿光学拾取装置中的彗形像差和/或球面像差的光学系统和具有该光学系统的光学拾取装置
- 专利标题： Optical system for compensating for coma aberration and/or spherical aberration in an optical pickup device and optical pickup device having the same
- 专利标题（中）： 用于补偿光学拾取装置中的彗形像差和/或球面像差的光学系统和具有该光学系统的光学拾取装置
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申请号： US12679049申请日： 2008-09-19
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公开(公告)号： US08233372B2公开(公告)日： 2012-07-31
- 发明人: Yasuhiro Tanaka , Michihiro Yamagata , Katsuhiko Hayashi , Masahiro Birukawa
- 申请人： Yasuhiro Tanaka , Michihiro Yamagata , Katsuhiko Hayashi , Masahiro Birukawa
- 申请人地址： JP Osaka
- 专利权人： Panasonic Corporation
- 当前专利权人： Panasonic Corporation
- 当前专利权人地址： JP Osaka
- 代理机构： Renner, Otto, Boisselle & Sklar, LLP
- 优先权： JP2007-243733 20070920; JP2007-327549 20071219
- 国际申请： PCT/JP2008/002591 WO 20080919
- 国际公布： WO2009/037851 WO 20090326
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
An optical system for optical pickup, which optical system is used for performing recording, reproducing, and/or erasing of information on an optical recording medium and has a simple configuration, is provided. An optical pickup device 1 includes a collimator lens system 23, a beam expander 33, and an objective lens system 34 that includes an S-SIL element 27b. The beam expander 33 includes a lens element 33c that is supported so as to be movable in a direction perpendicular to an optical axis. By moving the lens element 33c in the direction perpendicular to the optical axis, a coma aberration of a spot on a recording layer can be compensated in a state where the interval between a surface of an optical recording medium 28 and the S-SIL element 27b opposed thereto is maintained constant.