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61. 发明公开

EP0803868A2 Optical element and optical pickup device comprising the same 失效
标题翻译： Optischer Bauteil und optischesWiedergabegerätmit dergleichem
公开(公告)号：EP0803868A2
公开(公告)日：1997-10-29
申请号：EP97111248.7
申请日：1990-03-30
申请人： SHARP KABUSHIKI KAISHA
发明人： Yoshida, Yoshio , Miyake, Takahiro , Nakata, Yasuo , Kurata, Yukio , Ogata, Nobuo , Ueyama, Tetsuo , Sato, Hideaki
IPC分类号： G11B7/135 , G11B11/10 , G02B5/18
CPC分类号： G11B7/1365 , G02B1/118 , G02B5/1809 , G02B5/1814 , G02B5/1866 , G02B27/4261 , G02B27/4272 , G11B7/1353 , G11B11/10543
摘要： An optical element comprises a polarization diffraction element that is provided with diffraction gratings that are respectively mounted on different faces of a transparent substrate of a flat plate shape, which grating pitches are equal to each other and approximately equal to the wavelength of an incident light, and which grating lines are parallel; or comprises a phase shifting element or an antireflection element composed by a grating which grating pitch is approximately equal to the wavelength of an incident light, formed on a transparent base; or comprises a polarization diffraction element that is provided with a substrate made of a material having an optical anisotropy property, and a grating, and wherein the thickness of the substrate is set such that the difference that occurs between the phases of the P and S polarizations of a light due to the grating, and the difference that occurs between the phases of the two polarizations when the light propagates through the substrate, and cancel out; or comprises a polarization diffraction unit wherein a diffraction grating which grating pitch is approximately equal to the wavelength of an incident light, is formed on a face of a transparent substrate, and a phase compensating grating which grating lines are substantially orthogonal to the grating lines of the diffraction grating, is formed on the other face of the substrate.
An optical pickup device comprises an optical element wherein a grating which grating pitch is approximately equal to the wavelength of an incident light, is formed on a transparent base. An optical pickup device comprises a polarized light detecting unit provided with a diffraction grating which grating pitch is approximately equal to the wavelength of an incident light, that is formed on a transparent substrate, and that splits the incident light into two polarized lights having mutually orthogonal polarizations; a first photodetector that is mounted integrally and virtually in parallel with the substrate, and that receives a zeroth-order diffracted light produced by the diffraction grating; and a second photodetector that is located in the same plane as the first photodetector and mounted integrally with the first photodetector and the substrate, and that receives a first-order diffracted light produced by the diffraction grating.
As a result, a simple and inexpensive optical element may be fabricated, and a compact and light optical pickup device may be designed. Furthermore, the access to a magneto-optical recording medium may be performed accurately, and recording signals of high quality may be obtained.
摘要翻译：光学元件包括具有衍射光栅的偏振衍射元件，衍射光栅分别安装在平板形状的透明基板的不同的表面上，该光栅间距彼此相等并且近似等于入射光的波长，哪些光栅线是平行的？或者包括形成在透明基底上的由光栅构成的相移元件或抗反射元件，光栅间距近似等于入射光的波长; 或包括设置有由具有光学各向异性特性的材料制成的基板的偏振衍射元件和光栅，并且其中基板的厚度设定为使得在P和S偏振的相位之间发生的差异由于光栅引起的光，以及当光传播通过衬底时在两个偏振的相位之间发生的差异，并且抵消; 或者包括偏振衍射单元，其中在透明基板的表面上形成光栅间距近似等于入射光的波长的衍射光栅，并且相位补偿光栅的光栅线基本上与衍射光栅形成在基板的另一面上。光学拾取装置包括光学元件，其中光栅间距近似等于入射光的波长的光栅形成在透明基底上。一种光拾取装置，包括：具有衍射光栅的偏振光检测单元，栅格间距近似等于入射光的波长，形成在透明基板上，并将入射光分为两个相互正交的偏振光极化; 第一光电检测器，其一体地安装并且基本上与基板平行，并且接收由衍射光栅产生的零级衍射光; 以及第二光电检测器，其位于与第一光电检测器相同的平面中并与第一光电检测器和基板一体地安装，并且接收由衍射光栅产生的一级衍射光。结果，可以制造简单且廉价的光学元件，并且可以设计紧凑且轻便的光学拾取装置。此外，可以精确地执行对磁光记录介质的访问，并且可以获得高质量的记录信号。

62. 发明授权

EP0550155B1 A display apparatus 失效
公开(公告)号：EP0550155B1
公开(公告)日：1997-04-23
申请号：EP92310999.5
申请日：1992-12-02
申请人： SHARP KABUSHIKI KAISHA
发明人： Sakai, Keiji , Yoshida, Yoshio , Yamamoto, Hiroyuki , Kurata, Yukio , Nakata, Yasuo , Miyake, Takahiro
IPC分类号： G09F1/00 , G09F9/30 , G02B6/06 , C03B37/15 , C03B37/14 , G02B6/42
CPC分类号： G02F1/13336 , G02B6/06 , G09F9/305 , Y10S385/901

63. 发明授权

EP0508824B1 A three-dimensional image display apparatus 有权
标题翻译：一种用于三维图像再现装置
公开(公告)号：EP0508824B1
公开(公告)日：1996-09-11
申请号：EP92303252.8
申请日：1992-04-10
申请人： SHARP KABUSHIKI KAISHA
发明人： Kurata, Yukio , Sakai, Keiji , Yoshida, Yoshio , Miyake, Takahiro , Ishikawa, Toshio
IPC分类号： G02B27/22
CPC分类号： G02B27/26 , H04N13/322 , H04N13/395
摘要： A three-dimensional image display apparatus which includes a plurality of display devices, a first optical arrangement for synthesizing a plurality of images from the image display devices, a second optical arrangement for changing a position where at least one of the images is projected, the first and second optical arrangement synthesizing a plurality of images formed at different positions.

64. 发明授权

EP0453323B1 Optical pickup device 有权
标题翻译：的光拾取器
公开(公告)号：EP0453323B1
公开(公告)日：1995-12-13
申请号：EP91303579.6
申请日：1991-04-22
申请人： SHARP KABUSHIKI KAISHA
发明人： Miyake, Takahiro , Yoshida, Yoshio , Kurata, Yukio
IPC分类号： G11B7/09 , G11B7/125 , G11B7/135 , G02B13/10 , G02B27/00
CPC分类号： G02B27/0972 , G02B13/10 , G02B19/0028 , G02B19/0052 , G02B19/0085 , G02B27/09 , G11B7/0916 , G11B7/094 , G11B7/1353 , G11B7/1359 , G11B7/1398

65. 发明公开

EP0581597A3 An optical information reproducing device 失效
标题翻译：设备用于再现光学信息。
公开(公告)号：EP0581597A3
公开(公告)日：1995-01-18
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.

66. 发明授权

EP0377454B1 Image reading apparatus 失效
公开(公告)号：EP0377454B1
公开(公告)日：1994-11-02
申请号：EP90100101.6
申请日：1990-01-03
申请人： SHARP KABUSHIKI KAISHA
发明人： Tsuji, Shigeki , Kurata, Yukio , Yokota, Taizo
IPC分类号： H04N1/028 , G02B6/06
CPC分类号： G02B5/1885 , G02B3/0056 , G02B3/08 , G02B27/4211 , G02B27/4227 , G02B27/4272 , H04N1/0311 , H04N1/0312 , Y02E10/52

67. 发明公开

EP0612064A2 An optical pickup apparatus 失效
标题翻译： Optische Abtastvorrichtung。
公开(公告)号：EP0612064A2
公开(公告)日：1994-08-24
申请号：EP94201533.0
申请日：1989-06-23
申请人： SHARP KABUSHIKI KAISHA
发明人： Nagahama, Toshiya , Kurata, Yukio , Yoshida, Yoshio
IPC分类号： G11B7/135 , G11B7/13 , G11B7/09
CPC分类号： G11B7/1381 , G11B7/0903 , G11B7/0909 , G11B7/0912 , G11B7/13 , G11B7/131 , G11B7/1353
摘要： An optical pickup apparatus for reproducing information from an optical recording medium such as a compact disc, comprises a laser device (1), one or more diffraction devices (2,3) and a photodetector (7) receiving a laser beam diffracted by the diffraction device (3). The surfaces of the diffraction device (3) are provided with an antireflection coating (8a,8b). When the apparatus is used for the three-beam method, the two photodetecting areas (7a,7b) in the photodetector for producing the tracking error signal are different in size or in the positional relation with the laser device (1).
摘要翻译：一种用于从诸如光盘的光学记录介质再现信息的光学拾取装置包括激光装置（1），一个或多个衍射装置（2,3）和接收通过衍射衍射的激光束的光电检测器（7）装置（3）。衍射装置（3）的表面设置有抗反射涂层（8a，8b）。当将该装置用于三光束方法时，用于产生跟踪误差信号的光电检测器中的两个光电检测区域（7a，7b）的大小或与激光装置（1）的位置关系不同。

68. 发明公开

EP0585102A1 An optical device having two optical waveguides connected and a method of producing the same 失效
标题翻译：光学装置，其包括两个连接的光波导，以及它们的制造方法。
公开(公告)号：EP0585102A1
公开(公告)日：1994-03-02
申请号：EP93306691.2
申请日：1993-08-24
申请人： SHARP KABUSHIKI KAISHA
发明人： Minami, Kouji , Okada, Kuniaki , Miki, Renzaburo , Yamamoto, Hiroyuki , Yoshida, Yoshio , Kurata, Yukio
IPC分类号： G02B6/26 , G02B1/10
CPC分类号： G02B6/132 , G02B6/262 , G02B6/4207 , G02B2006/12038 , G02B2006/12095 , G02B2006/12116 , G02B2006/12195
摘要： An optical device includes: a first dielectric slab waveguide (10) having a effective refractive index N₁; a second dielectric slab waveguide (20) having a effective refractive index N₂; and a third dielectric slab waveguide (30) having a length 1 and a effective refractive index N₃, the third dielectric slab waveguide being formed between the first dielectric slab waveguide and the second dielectric slab waveguide so as to connect the first dielectric slab waveguide with the second dielectric slab waveguides optically; wherein the length 1 and the effective refractive index N₃ substantially satisfy following equations;
where λ is a free-space wavelength of light traveling in the optical device and the light travels from the first dielectric slab waveguide to the third dielectric slab waveguide at an incident angle ϑ in a single mode.
摘要翻译：一种光学器件，包括：具有折射率N1有效的第一电介质平板波导（10）; 具有折射率N2有效的第二电介质平板波导（20）; 和具有长度1和有效折射率N3的第三电介质平板波导（30），所述第三电介质平板波导在所述第一电介质平板波导和第二电介质板，从而波导之间形成为第一电介质平板波导与所述连接第二电介质平板波导光学; worin长度1与有效折射率N3基本上满足以下等式; 其中的λ是光传播的一个自由空间波长的光学器件和光从所述第一电介质平板波导到所述第三电介质平板波导在以单一模式行进以入射角θ角。

69. 发明授权

EP0255305B1 Focusing error detecting device and method of manufacturing the same 失效
标题翻译：聚焦错误检测装置及其制造方法
公开(公告)号：EP0255305B1
公开(公告)日：1993-01-07
申请号：EP87306575.9
申请日：1987-07-24
申请人： SHARP KABUSHIKI KAISHA
发明人： Ogata, Nobuo , Nakata, Yasuo , Satou, Hideaki , Tanaka, Toshiyuki , Minami, Etsuji , Yoshida, Yoshio , Kurata, Yukio , Inoue, Teruaki
IPC分类号： G11B7/13 , G02B27/00
CPC分类号： G11B7/22 , G11B7/0909 , G11B7/13922

70. 发明公开

EP0508824A1 A three-dimensional image display apparatus 有权
标题翻译： Vorrichtung zur dreidimensionalen Bildwiedergabe。
公开(公告)号：EP0508824A1
公开(公告)日：1992-10-14
申请号：EP92303252.8
申请日：1992-04-10
申请人： SHARP KABUSHIKI KAISHA
发明人： Kurata, Yukio , Sakai, Keiji , Yoshida, Yoshio , Miyake, Takahiro , Ishikawa, Toshio
IPC分类号： G02B27/22
CPC分类号： G02B27/26 , H04N13/322 , H04N13/395
摘要： A three-dimensional image display apparatus which includes a plurality of display devices, a first optical arrangement for synthesizing a plurality of images from the image display devices, a second optical arrangement for changing a position where at least one of the images is projected, the first and second optical arrangement synthesizing a plurality of images formed at different positions.
摘要翻译：一种三维图像显示装置，包括多个显示装置，用于从图像显示装置合成多个图像的第一光学装置，用于改变投影至少一个图像的位置的第二光学装置，第一和第二光学装置合成形成在不同位置的多个图像。

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