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27 条记录 (耗时 0.012 秒)

    A method of making optical disk master and an optical disk
    1.
    发明公开
    A method of making optical disk master and an optical disk 失效
    一种用于生产矩阵用于光盘和光盘的过程。

    公开(公告)号：EP0411525A2

    公开(公告)日：1991-02-06

    申请号：EP90114562.3

    申请日：1990-07-30

    申请人： HITACHI, LTD. ,  Hitachi Maxell Ltd.

    发明人： Ito, Masaru ,  Fujita, Masumi

    IPC分类号： G11B7/26 ,  G11B7/16 ,  G11B7/125 ,  G11B7/013 ,  G11B23/00

    CPC分类号： G11B7/261 ,  G03F7/26 ,  G03F7/70241 ,  G03F7/70308 ,  G11B7/004 ,  G11B7/24085 ,  G11B2007/13727

    摘要： An optical disk master (19) having a diffraction structure including guide grooves (8) and small pre- pits (9) of a width narrower than a diffraction limit determined by a wavelength of light used is produced by preparing a photoresist layer (21) subjected to anti-dissolution surface treatment, narrowing the spot diameter of a zero-th diffracted beam irradiated on the photoresist layer by means of a super resolution optics (22), and effecting high contrast development to leave behind, as it is, a portion of the photoresist layer exposed to adverse higher order diffracted beams caused by super resolution. An optical disk (45) produced from the master has a diffraction structure including tracks and/or pre-pits formed along a spiral track or concentric tracks (7) and having a width narrower than a diffraction limit determined by a wavelength of light used in the course of formation of the diffraction structure.

    摘要翻译： 具有衍射结构，包括导向槽（8）和一个宽度小的预凹陷（9）窄于通过使用产生的光的波长开采通过制备光致抗蚀剂层中的衍射极限确定性的光盘主站（19）（21） 进行抗溶解的表面处理，通过超分辨率光学器件（22）的方式缩小照射的光致抗蚀剂层上的第零衍射光束的光点直径，及影响高对比度发展留下，因为它是，一个部分 的暴露于由超分辨率引起的不良高阶衍射光束的光致抗蚀剂层。 从主生产的光学盘（45）具有由所使用的光的波长开采的衍射结构，其包括沿着螺旋轨道或同心轨道（7）形成的磁迹和/或预凹坑和其宽度比衍射极限窄确定性 形成的衍射结构的过程。

    Magneto-optical disk
    3.
    发明公开
    Magneto-optical disk 失效
    Magneto-optische Scheibe。

    公开(公告)号：EP0282744A2

    公开(公告)日：1988-09-21

    申请号：EP88102182.8

    申请日：1988-02-15

    申请人： HITACHI, LTD. ,  Hitachi Maxell Ltd.

    发明人： Niihara, Toshio ,  Ito, Masaru ,  Shigematsu, Kazuo ,  Kaku, Toshimitsu ,  Taii, Toshiaki Hitachi Makuseru Shihoryo ,  Ohta, Norio ,  Yoshihiro, Masafumi Hitachi Makuseru Shioryo

    IPC分类号： G11B11/10

    CPC分类号： G11B7/0938 ,  G11B11/10582

    摘要： A magneto-optical disk comprises at least a transparent substrate (1) having V-shaped grooves (6) formed therein, a transparent film (3) having a greater refractive index than that of the transparent substrate and a magnetic film (4). Information is recorded between adjacent ones of the V-shaped grooves (6). The V-shaped groove (6) has a depth shallower than λ/6 and deeper than λ/8 where λ represents wave length of laser light with which the magneto-optical disk is irradiated. Optimal tracking signal can be obtained without lowering the push-pull signal intensity for the tracking.

    摘要翻译： 磁光盘至少包括其中形成有V形槽（6）的透明基板（1），具有比透明基板更大的折射率的透明膜（3）和磁性膜（4）。 在相邻的V形槽（6）之间记录信息。 V形槽（6）的深度比λ/ 6浅，深于λ/ 8，其中λ表示照射磁光盘的激光的波长。 可以在不降低跟踪的推挽信号强度的情况下获得最佳跟踪信号。

    A method of making optical disk master and an optical disk
    5.
    发明公开
    A method of making optical disk master and an optical disk 失效
    制造光盘和光盘的方法

    公开(公告)号：EP0411525A3

    公开(公告)日：1991-12-11

    申请号：EP90114562.3

    申请日：1990-07-30

    申请人： HITACHI, LTD. ,  Hitachi Maxell Ltd.

    发明人： Ito, Masaru ,  Fujita, Masumi

    IPC分类号： G11B7/26 ,  G11B7/16 ,  G11B7/125 ,  G11B7/013 ,  G11B23/00

    CPC分类号： G11B7/261 ,  G03F7/26 ,  G03F7/70241 ,  G03F7/70308 ,  G11B7/004 ,  G11B7/24085 ,  G11B2007/13727

    摘要： An optical disk master (19) having a diffraction structure including guide grooves (8) and small pre- pits (9) of a width narrower than a diffraction limit determined by a wavelength of light used is produced by preparing a photoresist layer (21) subjected to anti-dissolution surface treatment, narrowing the spot diameter of a zero-th diffracted beam irradiated on the photoresist layer by means of a super resolution optics (22), and effecting high contrast development to leave behind, as it is, a portion of the photoresist layer exposed to adverse higher order diffracted beams caused by super resolution. An optical disk (45) produced from the master has a diffraction structure including tracks and/or pre-pits formed along a spiral track or concentric tracks (7) and having a width narrower than a diffraction limit determined by a wavelength of light used in the course of formation of the diffraction structure.

    Method and apparatus for composite wobbled tracking servo system
    7.
    发明公开
    Method and apparatus for composite wobbled tracking servo system 失效
    用于复合的方法和设备扫过Spurnachsteuerungssystem。

    公开(公告)号：EP0210330A2

    公开(公告)日：1987-02-04

    申请号：EP86104340.4

    申请日：1986-03-29

    申请人： HITACHI, LTD.

    发明人： Yonezawa, Seiji ,  Ohtake, Masatoshi ,  Ito, Masaru ,  Tsuyoshi, Toshiaki ,  Ichino, Kazuo ,  Nakagaki, Harushige Hachimanyama-Apartment 312

    IPC分类号： G11B7/095 ,  G11B7/013

    CPC分类号： G11B7/24085 ,  G11B7/0901 ,  G11B7/0904 ,  G11B7/094 ,  G11B7/0948 ,  G11B7/0956

    摘要： A composite wobbled tracking servo system uses a rotary optical disc (10) which has a header field (123) and a data field (122) alternately arranged along the direction of rotation to provide a sector, and which includes pregrooves (15-1, 15-2) formed in at least the data field and at least one pair of wobbled track marks (20-1, 20-2) disposed in the header field in relation wobbled relative to the center of a track. A light spot (11) is directed toward and onto the optical disc to detect a push-pull tracking error signal (16) from the reflection of the light spot diffracted by the pregroove (15), and a wobbled tracking error signal (24; 45) is detected from the reflection of the light spot traversing the wobbled track marks. The push-pull tracking error signal is corrected on the basis of the wobbled tracking error signal to attain the tracking control with higher accuracy, thereby eliminating an undesirable track offset attributable to tilting or eccentricity of the optical disc.

    Electrical machine and vehicle drive equipped with the same
    9.
    发明公开
    Electrical machine and vehicle drive equipped with the same 审中-公开
    电机和汽车驱动用本机

    公开(公告)号：EP2053722A3

    公开(公告)日：2010-10-06

    申请号：EP08018563.0

    申请日：2008-10-23

    申请人： Hitachi Ltd.

    发明人： Nishidate, Keisuke ,  Ito, Masaru ,  Obara, Shingo ,  Fujiwara, Shin

    IPC分类号： H02K1/14

    CPC分类号： H02K1/148 ,  H02K1/146

    摘要： An electrical machine includes a stator that includes: a yoke formed with laminated annular steel sheets; and a plurality of magnetic poles which protrude towards an inner diameter side of the yoke and on which a field coil is wound. In the stator, a radial width of a part of the yoke corresponding to a magnetic pole width is broader to an outer diameter side than a radial width of a part of the yoke provided throughout between the magnetic poles; and the stator is provided with a thorough-hole for a tightening bolt in the part of the yoke with the broad radial width.