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Magneto-optical disk apparatus capable of accurate reproduction of signal by removing magnetic influence by magnet included in optical head and method of detecting intensity of magnetic field applied by magnet

机译：通过消除包括在光学头中的磁体的磁影响而能够精确地再现信号的磁光盘设备以及检测由磁体施加的磁场强度的方法

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摘要

A magneto-optical disk apparatus includes a magnetic head in a position opposed to an objective lens included in an optical head with a magneto-optical record medium therebetween. The magneto-optical disk apparatus includes a magnet for cancelling a first magnetic field emitted toward the magnetic head from a magnet for focus servo-control or tracking servo-control of the objective lens. The magnet emits a second magnetic field in a direction toward the magnetic head. The second magnetic field is opposite in direction to the first magnetic field, and has the same intensity as the first magnetic field. Consequently, the signal can be accurately reproduced from the magneto-optical record medium while removing a magnetic influence from the magnet included in the optical head.

机译：磁光盘装置包括在与包括在光学头中的物镜相对的位置中的磁头，并且在其间具有磁光记录介质。磁光盘设备包括磁体，该磁体用于抵消从用于物镜的聚焦伺服控制或跟踪伺服控制的磁体向磁头发射的第一磁场。磁体在朝向磁头的方向上发射第二磁场。第二磁场与第一磁场的方向相反，并且具有与第一磁场相同的强度。因此，可以从磁光记录介质中准确地再现信号，同时消除包括在光学头中的磁体的磁影响。

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公开/公告号US2002034128A1

专利类型
公开/公告日2002-03-21

原文格式PDF
申请/专利权人 SANYO ELECTRIC CO. LTD.;
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申请/专利号US20010953194
发明设计人 MASAAKI SHIDOCHI;KANICHI KOYAMA;YOICHI TSUCHIYA;MITSUHIKO MAEDA;SEIJI KAJIYAMA;SEIICHIRO TAKAHASHI;
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申请日2001-09-17
分类号G11B11/00;
国家 US
入库时间 2022-08-22 00:52:16

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