发明申请
- 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: US11894780申请日: 2007-08-21
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公开(公告)号: US20080068960A1公开(公告)日: 2008-03-20
- 发明人: Ryozo Hosoda , Kazuhiro Takahashi , Shinya Hatano , Hiromasa Sasaoka
- 申请人: Ryozo Hosoda , Kazuhiro Takahashi , Shinya Hatano , Hiromasa Sasaoka
- 申请人地址: JP Osaka 574-0013
- 专利权人: Funai Electric Co., Ltd.
- 当前专利权人: Funai Electric Co., Ltd.
- 当前专利权人地址: JP Osaka 574-0013
- 优先权: JP2006-224063 20060821
- 主分类号: G11B7/00
- IPC分类号: G11B7/00
摘要:
The present invention provides an optical pickup device capable of properly suppressing coma aberration which occurs due to a relative tilt error between objective lenses. The optical pickup device includes: first and second objective lenses having different optical characteristics; a lens holder provided with first and second lens receiving cylindrical parts to which the first and second objective lenses are attached so that distance from the first objective lens to an optical recording medium becomes shorter than distance from the second objective lens to the optical recording medium without overlapping the objective lenses; and a buffer member formed in a cylindrical shape so as to surround the periphery of the first objective lens, and having a projection for preventing collision between the first objective lens and the optical recording medium, the projection being provided at an end on the optical recording medium side. In the optical pickup device, the second objective lens is fixed in the lens receiving cylindrical part, and a lens tilt adjusting and holding structure for holding the first objective lens so that tilt of the first objective lens can be adjusted is added to the buffer member and the first lens receiving cylindrical part.
公开/授权文献
- US07903506B2 Optical pickup device 公开/授权日:2011-03-08
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