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65 条记录 (耗时 0.018 秒)

    Optical system in a magneto-optical memory device
    44.
    发明授权
    Optical system in a magneto-optical memory device 失效
    磁光存储器件中的光学系统

    公开(公告)号：US4721368A

    公开(公告)日：1988-01-26

    申请号：US668796

    申请日：1984-11-06

    申请人： Toshihisa Deguchi ,  Tetsuya Inui ,  Yoshikazu Fujii ,  Hideyoshi Yamaoka

    发明人： Toshihisa Deguchi ,  Tetsuya Inui ,  Yoshikazu Fujii ,  Hideyoshi Yamaoka

    IPC分类号： G02B5/30 ,  G02B27/28 ,  G11B11/10 ,  G11B11/105 ,  G11C13/06

    CPC分类号： G11B11/10532

    摘要： A magneto-optical memory device includes a recording medium having a magnetic anisotropy in a direction perpendicular to the main surface thereof. A semiconductor laser is employed in an optical system of the magneto-optical memory device for reproduction purposes. A polarization beam splitter is disposed in the optical system. A multi coated dielectric thin-film is deposited on the reflection surface of the polarization beam splitter in order to establish a desired relationship between the reflection of the P-polarization component and the S-polarization component.

    摘要翻译： 磁光存储器件包括在与其主表面垂直的方向上具有磁各向异性的记录介质。 在光磁存储器件的光学系统中采用半导体激光器用于再现目的。 偏振分束器设置在光学系统中。 为了在P偏振分量的反射和S偏振分量之间建立期望的关系，将多层电介质薄膜沉积在偏振分束器的反射表面上。

    Method of forming permanent memory locations in a magnetooptic memory medium
    45.
    发明授权
    Method of forming permanent memory locations in a magnetooptic memory medium 失效
    在磁光存储介质中形成永久记忆位置的方法

    公开(公告)号：US4677601A

    公开(公告)日：1987-06-30

    申请号：US585179

    申请日：1984-03-01

    申请人： Kenji Ohta ,  Toshihisa Deguchi ,  Akira Takahashi

    发明人： Kenji Ohta ,  Toshihisa Deguchi ,  Akira Takahashi

    IPC分类号： G03G5/16 ,  G11B7/09 ,  G11B11/10 ,  G11B11/105 ,  H01F10/13 ,  G11B7/007

    CPC分类号： G03G5/16 ,  G11B11/10 ,  G11B11/10582 ,  G11B11/10591 ,  G11B7/0938 ,  H01F10/136 ,  Y10S428/90

    摘要： Disclosed is a new magnetic storage medium including a layer of amorphous material typically GdDyFe whose Curie recording point (e.g., 120.degree. C.) is lower than its crystallization point (e.g., 350.degree. C.) to enable crystallization to cause variations in its optical properties such as transmittance or reflectivity for thermomagnetic writing. Reversible recordings are set up on the amorphous material layer by a thermomagnetic writing technique, for example Curie point writing, while unchangeable or permanent recordings are set up on the amorphous material layer through laser-activated crystallization of the amorphous material layer.

    摘要翻译： 公开了一种新的磁存储介质，其包括通常具有居里记录点（例如，120℃）低于其结晶点（例如，350℃）的GdDyFe的非晶材料层，以使结晶能够引起其光学变化 热磁写入的透光率或反射率等特性。 通过热磁写入技术（例如居里点写入）在非晶材料层上设置可逆记录，而通过非晶材料层的激光激活结晶，在非晶材料层上建立不变的或永久的记录。

    Optical focus position control in optical disc apparatus
    46.
    发明授权
    Optical focus position control in optical disc apparatus 失效
    光盘装置中的光焦点位置控制

    公开(公告)号：US4660190A

    公开(公告)日：1987-04-21

    申请号：US529849

    申请日：1983-09-06

    申请人： Yoshikazu Fujii ,  Toshihisa Deguchi ,  Tetsuya Inui ,  Hideyoshi Yamaoka

    发明人： Yoshikazu Fujii ,  Toshihisa Deguchi ,  Tetsuya Inui ,  Hideyoshi Yamaoka

    IPC分类号： G11B7/09 ,  G11B11/105 ,  G11B7/00

    CPC分类号： G11B11/10576 ,  G11B11/10504 ,  G11B7/09 ,  G11B7/093 ,  G11B7/0932

    摘要： Disclosed below is a control device for positioning an optical focus in an optical disc apparatus that records, plays back, and erases any information by irradiating optical beams such as the laser beams onto a recording media composed of magnetic film, wherein the control device is characterized in that; it incorporates a focussing permanent magnet that makes up a closed magnetic circuit, a focussing yoke plate, a focussing yoke, and a focussing device coil installed so that it crosses a focussing magnetic space existing that exists between the focussing yoke plate and the focussing yoke so that the focussing magnetic space can be created in an area close to the recording media which is installed in the closed magnetic circuit. In addition, the optical focus position control device that executes both the tracking and focussing control operations for the optical disc apparatus also includes mechanism that drives the objective lens in the direction of dual axes, i.e., in the vertical (up/down) and horizontal (left/right) directions.

    摘要翻译： 以下公开了一种用于将光学焦点定位在光盘装置中的控制装置，其通过将诸如激光束的光束照射到由磁性膜构成的记录介质上来记录，重放和擦除任何信息，其中控制装置的特征在于 在那里面; 它结合了一个聚焦永久磁铁，它构成一个封闭的磁路，一个聚焦磁轭板，一个聚焦磁轭和一个聚焦装置线圈，它被安装成使得它穿过存在于聚焦磁轭板和聚焦磁轭之间的聚焦磁空间， 可以在靠近安装在闭合磁路中的记录介质的区域中产生聚焦磁空间。 此外，执行光盘装置的跟踪和聚焦控制操作的光焦点位置控制装置还包括在双轴方向上驱动物镜的机构，即垂直（上/下）和水平 （左/右）方向。

    Track counter for optical disk
    50.
    发明授权
    Track counter for optical disk 失效
    磁盘跟踪计数器

    公开(公告)号：US5001732A

    公开(公告)日：1991-03-19

    申请号：US458367

    申请日：1989-12-28

    申请人： Masaru Nomura ,  Hirotsugu Matoba ,  Toshihisa Deguchi ,  Shigeo Terashima

    发明人： Masaru Nomura ,  Hirotsugu Matoba ,  Toshihisa Deguchi ,  Shigeo Terashima

    IPC分类号： G11B7/085 ,  G11B21/08

    CPC分类号： G11B7/08541

    摘要： The track counter for optical disk in accordance with the present invention, that counts the number of tracks a light beam passes upon when an optical head moves over an optical disk in the radial direction, comprises a passage signal generating circuit for detecting based on a reflected light of the light beam from the optical disk, that the light beam passed upon a track and for releasing a passage signal on that occasion, a counter that counts the passage signals released by the passage signal generating circuit, a count suspending circuit for forecasting that the light beam will pass upon a specific position of a track and for suspending the count by the aforementioned counter of the passage signals during this forecasted period, and a count value compensating circuit for assuming, when the count of the passage signals is suspended by the count suspending circuit, the number of tracks the light beam passed upon during that period, and for adding this assumed number to the count value of the counter. This track counter for optical disk is arranged such that it is able to count accurately the number of tracks the light beam passed upon even when the light beam passed upon the ID sections of a track, or when the passage upon a track cannot be detected because of a scratch on the surface of the disk or the like. Thereby, when the optical head moves and slides, the access speed may be enhanced.