发明名称 |
Recording and reproducing apparatus for recording and reproducing information to and from a magneto-optical storage medium |
摘要 |
An information recording/reproducing apparatus for recording and reproducing information to and from a magneto-optical storage medium that includes a first magnetic layer for recording at least information, a second magnetic layer for regulating a switched connective force, and a third magnetic layer for shifting a magnetic wall of recorded markings for information reproduction. The three layers being stacked on a transparent substrate to make up the storage medium. The information recording/reproducing apparatus includes an optical head and a magnetic head. The optical head has a light source and an objective lens, the light source is configured to emit at least a laser beam with a wavelength of about 780 nm, the objective lens having a numerical aperture of about 0.45 and is configured to focus the laser beam from the light source into a beam spot for emission onto the magneto-optical storage medium. The magnetic head is for applying a recording magnetic field to the magneto-optical storage medium.
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申请公布号 |
US2003185109(A1) |
申请公布日期 |
2003.10.02 |
申请号 |
US20030402943 |
申请日期 |
2003.04.01 |
申请人 |
SONY CORPORATION |
发明人 |
TOBITA MINORU;TERAOKA YOSHIYUKI;TANAKA TOMIJI;HATTORI MASATO;ISHII TAMOTSU |
分类号 |
G11B23/03;G11B11/105;G11B19/28;G11B20/00;G11B20/10;G11B20/12;G11B20/18;G11B27/034;G11B27/036;G11B27/10;G11B27/19;G11B27/24;G11B27/32;G11B27/34;(IPC1-7):G11B11/00;G11B33/02;G11B7/00;G11B7/135 |
主分类号 |
G11B23/03 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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