- 专利标题: Optical information storage medium reproduction apparatus and control method of the same
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申请号: US12814111申请日: 2010-06-11
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公开(公告)号: US08411538B2公开(公告)日: 2013-04-02
- 发明人: Masaki Yamamoto , Hirohisa Yamada , Yasuhiro Harada , Go Mori , Hideharu Tajima , Shigemi Maeda , Yoshiteru Murakami
- 申请人: Masaki Yamamoto , Hirohisa Yamada , Yasuhiro Harada , Go Mori , Hideharu Tajima , Shigemi Maeda , Yoshiteru Murakami
- 申请人地址: JP Osaka
- 专利权人: Sharp Kabushiki Kaisha
- 当前专利权人: Sharp Kabushiki Kaisha
- 当前专利权人地址: JP Osaka
- 代理机构: Edwards Wildman Palmer LLP
- 代理商 David G. Conlin; Stephen D. LeBarron
- 优先权: JP2007-273204 20071019
- 主分类号: G11B7/00
- IPC分类号: G11B7/00 ; G11B7/24
摘要:
In an optical information storage medium reproduction apparatus (10) for reproducing an optical information storage medium including a plurality of information recording layers each including a recording mark having a length shorter than an optical system resolution limit, reproduction laser power for reading an information recording layer closest to a reproduction-laser-incident surface of the optical information storage medium is set to be lower than reproduction laser power for reading an information recording layer farthest from the reproduction-laser-incident surface but not lower than minimum reproduction laser power that satisfies a reproduction signal characteristic that the optical information storage medium reproduction apparatus (10) requires. With the arrangement, it is possible to prevent that the information recording layer closest to the reproduction-laser-incident surface is irradiated wrongly with reproduction laser having high reproduction laser power, thereby making it possible to obtain successful reproduction quality. That is, it is possible to realize the optical information storage medium reproduction apparatus (10) that can set optimum reproduction laser power and perform stable super resolution reproduction.
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