发明授权
- 专利标题： Magneto-optical recording medium including a calibration magnetic domain recorded in a predetermined pattern in a recording layer
- 专利标题（中）： 磁光记录介质包括以记录层中的预定图案记录的校准磁畴
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申请号： US09931080申请日： 2001-08-17
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公开(公告)号： US06847590B2公开(公告)日： 2005-01-25
- 发明人: Atsushi Yamaguchi , Naoyuki Takagi , Yoshiharu Uchihara , Satoshi Sumi , Hiroyuki Awano , Hiroshi Shirai , Hitoshi Watanabe , Norio Ohta
- 申请人： Atsushi Yamaguchi , Naoyuki Takagi , Yoshiharu Uchihara , Satoshi Sumi , Hiroyuki Awano , Hiroshi Shirai , Hitoshi Watanabe , Norio Ohta
- 申请人地址： JP Moriguchi JP Ibaraki
- 专利权人： Sanyo Electric Co., Ltd.,Hitachi Maxell, Ltd.
- 当前专利权人： Sanyo Electric Co., Ltd.,Hitachi Maxell, Ltd.
- 当前专利权人地址： JP Moriguchi JP Ibaraki
- 代理机构： Armstrong, Kratz, Quintos, Hanson & Brooks, LLP
- 优先权： JP9-180034 19970704
- 主分类号： G11B7/007
- IPC分类号： G11B7/007 ; G11B7/013 ; G11B11/105 ; G11B11/00
摘要：
A magneto-optical recording medium which includes a reproducing layer. When a laser beam is irradiated to the magneto-optical recording medium, a magnetic domain in a recording layer is transferred, through enlargement, to a reproducing layer increased in temperature. The magneto-optical recording medium further includes a calibration area that has a calibration magnetic domain recorded in a predetermined pattern in the recording layer. In a reproducing apparatus, a laser beam of an optical head is adjusted in output depending upon a reproduced signal obtained by reproducing the calibration magnetic domain.
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