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61. 发明授权

EP0485235B1 A liquid crystal display apparatus 失效
公开(公告)号：EP0485235B1
公开(公告)日：1997-08-06
申请号：EP91310365.1
申请日：1991-11-08
申请人： SHARP KABUSHIKI KAISHA
发明人： Asada, Atsushi , Ishikawa, Toshio , Nakata, Yasuo , Yoshida, Yoshio , Kurata, Yukio
IPC分类号： G09F9/30 , G09F9/35 , G02B6/42
CPC分类号： G09F9/35 , G02B6/08 , G02F1/13336 , G02F1/133524

62. 发明授权

EP0428390B1 Manufacturing method of optical diffraction grating element 失效
$Manufacturing method of optical diffraction grating element$
标题翻译：用于光学衍射光栅的制造方法
公开(公告)号：EP0428390B1
公开(公告)日：1996-03-06
申请号：EP90312388.3
申请日：1990-11-13
申请人： SHARP KABUSHIKI KAISHA
发明人： Sakai, Keiji , Kubo, Katsuhiro , Kurata, Yukio
IPC分类号： G02B5/18
CPC分类号： G02B5/1857

63. 发明授权

EP0462757B1 Polarization diffraction element and polarization detector employing the same 失效
$Polarization diffraction element and polarization detector employing the same$
标题翻译：偏振衍射元件和该元件中所使用的方向极化检测器。
公开(公告)号：EP0462757B1
公开(公告)日：1995-11-22
申请号：EP91305375.7
申请日：1991-06-13
申请人： SHARP KABUSHIKI KAISHA
发明人： Yoshida, Yoshio , Miyake, Takahiro , Nakata, Yasuo , Kurata, Yukio
IPC分类号： G02B5/18 , G02B5/30 , G02B27/28 , G11B7/135
CPC分类号： G11B7/1353 , G02B5/1809 , G02B5/1814 , G02B27/28 , G02B27/283 , G02B27/4261 , G02B27/4272 , G11B11/10543

64. 发明授权

EP0457573B1 Optical head 失效
标题翻译：光学头。
公开(公告)号：EP0457573B1
公开(公告)日：1995-08-23
申请号：EP91304366.7
申请日：1991-05-15
申请人： SHARP KABUSHIKI KAISHA
发明人： Miyake, Takahiro , Yoshida, Yoshio , Kurata, Yukio , Sato, Hideaki
IPC分类号： G11B7/13 , G11B7/135 , G11B7/125
CPC分类号： G11B7/1353 , G11B7/131 , G11B7/1356 , G11B7/1398

65. 发明授权

EP0391664B1 Optical diffraction grating element, and optical pick-up device and optical scan device that respectively comprise optical diffraction grating element 失效
$Optical diffraction grating element, and optical pick-up device and optical scan device that respectively comprise optical diffraction grating element$
标题翻译：光衍射光栅和光记录和拾取包含光学衍射光栅元件。
公开(公告)号：EP0391664B1
公开(公告)日：1994-03-16
申请号：EP90303559.0
申请日：1990-04-03
申请人： SHARP KABUSHIKI KAISHA
发明人： Miyake, Takahiro , Yoshida, Yoshio , Kurata, Yukio
IPC分类号： G02B5/18 , G02B27/44
CPC分类号： G11B7/1353 , G02B5/1814 , G02B5/1857 , G02B5/1871

66. 发明公开

EP0581597A2 An optical information reproducing device 失效
标题翻译：信息技术有限公司
公开(公告)号：EP0581597A2
公开(公告)日：1994-02-02
申请号：EP93306012.1
申请日：1993-07-29
申请人： SHARP KABUSHIKI KAISHA
发明人： Yoshida, Yoshio , Miki, Renzaburou , Kurata, Yukio , Yamamoto, Hiroyuki , Okada, Kuniaki , Minami, Kouji
IPC分类号： G11B11/10 , G11B7/12 , G11B7/13
CPC分类号： G11B11/10543 , G11B7/124 , G11B7/13
摘要： An optical information reproducing device is provided. The device includes a light source for generating a light beam, an optical system for converging the light beam generated by the light source on a magneto-optical recording medium on which recording information is recorded and for converging a return light beam reflected from the magneto-optical recording medium, beam splitting means for splitting the return light beam into split light beams, first detecting means for receiving one of the split light beams to detect the intensity of the one of the split light beams, servo signal generating means for generating a tracking error signal and a focusing error signal based on the output of the first detecting means, an optical waveguide disposed between the beam splitting means and the first detecting means, the optical waveguide crossing an optical axis of the one of the split light beams, an optical coupler disposed on the optical waveguide for separating part of the one of the split light beams from the one of the split beams to form a guided light beam which is guided in the optical waveguide, second detecting means for receiving the guided light beam from the optical waveguide to detect the intensity of at least one polarization component of the guided light beam, and information signal reproducing means for reproducing the recording information based on the output of the second detecting means.
摘要翻译：提供一种光信息再现装置。该装置包括用于产生光束的光源，用于将由光源产生的光束会聚在其上记录有记录信息的磁光记录介质上并用于会聚从磁光记录介质反射的返回光束的光学系统，光记录介质，用于将返回光束分离成分束光束的分束装置，用于接收分束光束中的一个以检测一个分束光束的强度的第一检测装置，用于产生跟踪的伺服信号产生装置误差信号和基于第一检测装置的输出的聚焦误差信号，设置在分束装置和第一检测装置之间的光波导，与所述一个分束光束的光轴交叉的光波导，光学耦合器设置在光波导上，用于将分离光束中的一个的一部分与分离光束中的一个分离以形成光束在光波导中被引导的第二光束，用于接收来自光波导的被引导光束以检测被引导光束的至少一个偏振分量的强度的第二检测装置，以及用于再现记录信息的信息信号再现装置基于第二检测装置的输出。

67. 发明公开

EP0555097A1 An optical information reproducing apparatus 失效
标题翻译： Gerätzur Wiedergabe optischer信息。
公开(公告)号：EP0555097A1
公开(公告)日：1993-08-11
申请号：EP93300882.3
申请日：1993-02-05
申请人： SHARP KABUSHIKI KAISHA
发明人： Yoshida, Yoshio , Kurata, Yukio , Tsuji, Shigeki
IPC分类号： G11B7/135 , G11B7/12
CPC分类号： G11B7/1353 , G11B7/123
摘要： An optical information reproducing apparatus of the invention includes a light emitting and receiving unit and an optical system. The optical system converges light from the light emitting and receiving unit on a recording medium and converges the light after reflected by the recording medium. The light emitting and receiving unit includes: a semiconductor laser device disposed an a substrate for generating light; a photo detector formed, integrally with the substrate, on the substrate on which the semiconductor laser device is disposed, for outputting a signal corresponding to the intensity of light incident thereon; and a beam splitter provided on an optical axis of the reflected light, the beam splitter leading part of the reflected light to the photo detector.
摘要翻译：本发明的光信息再现装置包括发光和接收单元和光学系统。光学系统将来自发光和接收单元的光会聚在记录介质上，并在被记录介质反射之后会聚该光。发光和接收单元包括：半导体激光器件，其设置有用于产生光的衬底; 在其上设置有半导体激光装置的基板上与基板一体形成的光检测器，用于输出与入射在其上的光的强度对应的信号; 以及设置在反射光的光轴上的分束器，分束器将反射光的一部分引导到光电检测器。

68. 发明公开

EP0402123A3 Optical head device 失效
标题翻译：光头设备
公开(公告)号：EP0402123A3
公开(公告)日：1992-03-04
申请号：EP90306170.3
申请日：1990-06-06
申请人： SHARP KABUSHIKI KAISHA
发明人： Miyake, Takahiro , Yoshida, Yoshio , Kurata, Yukio , Nakata, Yasuo , Kubo, Katsuhiro
IPC分类号： G11B7/12 , G11B7/135
CPC分类号： G11B7/0916 , G11B7/0903 , G11B7/0912 , G11B7/13 , G11B7/1353
摘要： The invention discloses an optical head device (10) having:-
a diffraction grating element (3) divided into a first diffraction grating (3a) and a second diffraction grating (3b) by a plane including an optical axis that connects a light emitting point on a semiconductor laser (1) to a focal point on a recording medium (6) such as an optical disk, so that the first and second diffraction gratings have a substantially equal diffraction angle, a substantially equal optical utilization efficiency, and different focal distances of first order diffracted lights, each of the first order diffracted lights being produced from a reflected light from the recording medium, at the respective diffraction gratings; and
a photodetector (7) positioned at a mid-position between two focal points produced when there occurs no focusing error, the photo-detecting means having a plurality of photo-detecting parts juxtaposed in a direction substantially orthogonal to an average diffracting direction of the diffraction grating element. In this optical head, the first diffraction grating and second diffraction grating are designed such that lights diffracted at the first diffraction grating and second diffraction grating are guided into the photo-detecting means to form light spots in the vicinity of centers of the corresponding photo-detecting parts, and the light spots are aligned in a direction substantially orthogonal to the average diffracting direction of the diffraction grating element. The above arrangement enables to produce a small size optical head device and improve the detection of focusing errors and tracking errors.
摘要翻译：本发明公开了一种光学头装置（10），其具有： - 衍射光栅元件（3），其通过包括光轴的平面分成第一衍射光栅（3a）和第二衍射光栅（3b），所述光轴将发光点在半导体激光器（1）上传输到诸如光盘等记录介质（6）上的焦点，使得第一和第二衍射光栅具有基本相等的衍射角，基本相等的光学利用效率和不同的焦距在各衍射光栅处，从记录介质的反射光产生每一个一级衍射光; 和一个光电探测器（7），它位于不发生聚焦误差时产生的两个焦点之间的中间位置，该光电探测装置具有多个光电检测部分，它们在基本上垂直于该光电检测器的平均衍射方向衍射光栅元件。在该光头中，第一衍射光栅和第二衍射光栅被设计成使得在第一衍射光栅和第二衍射光栅处衍射的光被引导到光检测装置中，以在对应的光电检测器的中心附近形成光点，检测部分，并且光点在与衍射光栅元件的平均衍射方向基本正交的方向上排列。上述配置使得能够产生小尺寸的光学头装置并且改善聚焦误差和跟踪误差的检测。

69. 发明公开

EP0459764A3 Optical head device 失效
标题翻译：光头设备
公开(公告)号：EP0459764A3
公开(公告)日：1992-01-29
申请号：EP91304820.3
申请日：1991-05-29
申请人： SHARP KABUSHIKI KAISHA
发明人： Miyake, Takahiro , Yoshida, Yoshio , Kurata, Yukio
IPC分类号： G11B7/09 , G11B7/135 , G11B7/12
CPC分类号： G11B7/1353 , G11B7/094 , G11B7/131 , G11B7/1359 , G11B7/1398
摘要： An optical head device having an optical system provided with at least a light source (10), a shaping prism, an diffracting element (20) and a photodetector (60). The light source emits light whose intensity distribution has an elliptic shape in its cross section orthogonal to the optical axis. The shaping prism directs the light to a recording medium (70) after shaping the intensity distribution thereof into a circular shape. The diffracting element has diffracting regions formed by at least one division line substantially parallel to a reference direction. The light reflected from the recording medium forms an elliptic bright portion on the diffracting element. The photodetector is divided by a plurality of division lines (64, 65), at least one of which is parallel to the reference direction. When there is no focus error, the diffracting element diffracts the reflected light so as to converge it on the division line substantially parallel to the reference direction in the photodetector. For example, when the shaping prism is adapted to shape the elliptic intensity distribution with respect to its minor axis direction, the optical system is arranged so that the major axis of the bright portion is parallel to the division line of the diffracting element. Thus, it is possible to suppress offsets in focusing control due to wave-length variations of light.
摘要翻译：一种具有光学系统的光学头装置，该光学系统至少具有光源，成形棱镜，衍射元件和光检测器。光源在与光轴正交的截面上发射强度分布为椭圆形的光。成形棱镜在将其强度分布成形为圆形之后将光引导至记录介质（70）。衍射元件具有由基本平行于参考方向的至少一个分割线形成的衍射区域。从记录介质反射的光在衍射元件上形成椭圆形的明亮部分。光电检测器被多个分割线（64,65）分割，其中至少一个分割线平行于参考方向。在没有聚焦误差的情况下，衍射元件衍射反射光以使其会聚在基本平行于光检测器中的参考方向的分割线上。例如，当成形棱镜适于相对于其短轴方向形成椭圆形强度分布时，光学系统被布置为使得明亮部分的长轴平行于衍射元件的分割线。因此，可以抑制由于光的波长变化引起的聚焦控制中的偏移。

70. 发明公开

EP0459764A2 Optical head device 失效
标题翻译： Anordnung eines optischen Kopfes。
公开(公告)号：EP0459764A2
公开(公告)日：1991-12-04
申请号：EP91304820.3
申请日：1991-05-29
申请人： SHARP KABUSHIKI KAISHA
发明人： Miyake, Takahiro , Yoshida, Yoshio , Kurata, Yukio
IPC分类号： G11B7/09 , G11B7/135 , G11B7/12
CPC分类号： G11B7/1353 , G11B7/094 , G11B7/131 , G11B7/1359 , G11B7/1398
摘要： An optical head device having an optical system provided with at least a light source (10), a shaping prism, an diffracting element (20) and a photodetector (60). The light source emits light whose intensity distribution has an elliptic shape in its cross section orthogonal to the optical axis. The shaping prism directs the light to a recording medium (70) after shaping the intensity distribution thereof into a circular shape. The diffracting element has diffracting regions formed by at least one division line substantially parallel to a reference direction. The light reflected from the recording medium forms an elliptic bright portion on the diffracting element. The photodetector is divided by a plurality of division lines (64, 65), at least one of which is parallel to the reference direction. When there is no focus error, the diffracting element diffracts the reflected light so as to converge it on the division line substantially parallel to the reference direction in the photodetector. For example, when the shaping prism is adapted to shape the elliptic intensity distribution with respect to its minor axis direction, the optical system is arranged so that the major axis of the bright portion is parallel to the division line of the diffracting element. Thus, it is possible to suppress offsets in focusing control due to wave-length variations of light.
摘要翻译：一种具有至少设置有光源（10），成形棱镜，衍射元件（20）和光电检测器（60）的光学系统的光学头装置。光源在其与光轴正交的横截面中发射其强度分布具有椭圆形的光。成形棱镜在将其强度分布形成圆形之后将光引导到记录介质（70）。衍射元件具有基本上平行于基准方向的至少一个划分线形成的衍射区域。从记录介质反射的光在衍射元件上形成椭圆形亮部。光电检测器由多个划分线（64,65）分隔开，其中至少一条与基准方向平行。当不存在聚焦误差时，衍射元件将反射光衍射，使其在基本上平行于光检测器中的基准方向的分割线上会聚。例如，当成形棱镜适于使其相对于其短轴方向成形椭圆强度分布时，光学系统被布置成使得亮部的长轴平行于衍射元件的分割线。因此，可以抑制由于光的波长变化引起的聚焦控制中的偏移。

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