发明授权
- 专利标题: Optical disk apparatus having a focusing error correcting system
- 专利标题(中): 具有聚焦误差校正系统的光盘装置
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申请号: US741620申请日: 1991-08-07
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公开(公告)号: US5280464A公开(公告)日: 1994-01-18
- 发明人: Tsuyoshi Itoh , Isao Okuda , Toshiyuki Kase , Hiroshi Nishikawa , Ryota Ogawa , Masahiro Oono , Koichi Maruyama , Makoto Iki
- 申请人: Tsuyoshi Itoh , Isao Okuda , Toshiyuki Kase , Hiroshi Nishikawa , Ryota Ogawa , Masahiro Oono , Koichi Maruyama , Makoto Iki
- 申请人地址: JPX Tokyo
- 专利权人: Asahi Kogaku Kogyo Kabushiki Kaisha
- 当前专利权人: Asahi Kogaku Kogyo Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX2-208633 19900807
- 主分类号: G11B11/10
- IPC分类号: G11B11/10 ; G11B7/09 ; G11B7/135 ; G11B11/105 ; G11B7/00
摘要:
An optical system of an optical disk apparatus having plural optical elements characterized in that the optical element having aberration which can counterbalance the wave front aberration of the whole optical system is disposed, or a direction of aberration of each existing optical element is adjusted in order to correct the wave front aberration.
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