发明授权
- 专利标题: Optical information reproducing apparatus, optical information recording and reproducing apparatus
- 专利标题(中): 光信息再生装置,光信息记录再生装置
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申请号: US12611948申请日: 2009-11-04
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公开(公告)号: US08085643B2公开(公告)日: 2011-12-27
- 发明人: Kenichi Shimada
- 申请人: Kenichi Shimada
- 申请人地址: JP Tokyo
- 专利权人: Hitachi Consumer Electronics Co., Ltd.
- 当前专利权人: Hitachi Consumer Electronics Co., Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Antonelli, Terry, Stout & Kraus, LLP.
- 优先权: JP2008-300338 20081126
- 主分类号: G11B7/00
- IPC分类号: G11B7/00
摘要:
In holographic recording by the angle multiplexing method, in order to allow a signal beam and a reference beam to sufficiently overlap with each other in a storage medium to decrease as much as possible a wastefully exposed region, which does not contribute to a signal recording, an optical pickup apparatus having a function which can control, for example, a size or a position of an aperture of the reference beam is used. An optical information reproducing apparatus or an optical information recording and reproducing apparatus using the optical pickup apparatus is used.
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