发明授权
- 专利标题: Optical pickup apparatus
- 专利标题(中): 光拾取装置
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申请号: US11663299申请日: 2006-11-06
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公开(公告)号: US07668066B2公开(公告)日: 2010-02-23
- 发明人: Yuichi Atarashi , Kohei Ota , Junji Hashimura , Kiyono Ikenaka
- 申请人: Yuichi Atarashi , Kohei Ota , Junji Hashimura , Kiyono Ikenaka
- 申请人地址: JP Tokyo
- 专利权人: Konica Minolta Opto, Inc.
- 当前专利权人: Konica Minolta Opto, Inc.
- 当前专利权人地址: JP Tokyo
- 代理机构: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- 优先权: JP2005-323296 20051108
- 国际申请: PCT/JP2006/022089 WO 20061106
- 国际公布: WO2007/055167 WO 20070518
- 主分类号: G11B7/00
- IPC分类号: G11B7/00
摘要:
An optical pickup apparatus for information recording and/or reproduction on different optical information recording media with compatibility among these media, the optical surface of a first objective lens and the optical surface of a second objective lens are formed only of a refractive surface. The second objective lens is used in common for the first light flux with a wavelength of λ1 and the second light flux with a wavelength of λ2, but in the case where the protective substrate t2 of the second optical information recording medium and the protective substrate t3 of the third optical information recording medium are the same, it is not necessary to take the difference in thickness of the protective substrate into consideration. Chromatic aberration based on the difference in wavelength between the first light flux and the second light flux can be corrected by displacing the second coupling lens.
公开/授权文献
- US20090196147A1 Optical pickup apparatus 公开/授权日:2009-08-06
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