发明授权
- 专利标题: Magneto-optical head assembly with improved detection means
- 专利标题(中): 具有改进检测手段的磁光头组件
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申请号: US437504申请日: 1982-10-28
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公开(公告)号: US4573149A公开(公告)日: 1986-02-25
- 发明人: Toshihisa Deguchi , Kenji Ohta , Akira Takahashi , Hideyoshi Yamaoka
- 申请人: Toshihisa Deguchi , Kenji Ohta , Akira Takahashi , Hideyoshi Yamaoka
- 申请人地址: JPX 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: JPX Osaka
- 优先权: JPX56-173975 19811029; JPX56-173976 19811029; JPX57-6645 19820118; JPX57-9327 19820122
- 主分类号: G11B7/08
- IPC分类号: G11B7/08 ; G11B11/105 ; H04N1/21 ; G11B11/00
摘要:
A magneto-optical head assembly for a reflection type magneto-optical memory apparatus uses a laser beam for recording, retrieving, and erasing data on a recording medium comprised of a vertical, magnetic, and anisotropic thin film. The light beam emitted from the head assembly is guided to a fixed position on said recording medium. Included are a light detection apparatus for receiving a control signal, and a separate light detection apparatus for receiving a data signal. A beam splitter, to which has been applied a multicoated thin film dielectric body capable of increasing the Kerr rotation angle of the laser beam reflected from the recording medium, is positioned in the optical system through which the laser beam passes.