公开(公告)号：US5473470A

公开(公告)日：1995-12-05

申请号：US093920

申请日：1993-07-21

申请人： Takahiro Miyake ,  Yoshio Yoshida ,  Yasuo Nakata ,  Yukio Kurata

发明人： Takahiro Miyake ,  Yoshio Yoshida ,  Yasuo Nakata ,  Yukio Kurata

IPC分类号： G01J4/04 ,  G02B5/18 ,  G02B5/30 ,  G02B27/28 ,  G11B11/10 ,  G11B11/105 ,  G11B7/00

CPC分类号： G01J4/04 ,  G02B27/283 ,  G02B5/1809 ,  G02B5/1814

摘要： A polarization detector includes a polarization diffraction element having a substrate with two facing surfaces which are placed in parallel with each other, a first diffraction grating formed on one surface of the substrate, and a second diffraction grating formed on the other surface of the substrate, with light being incident upon the first diffraction grating. Further, each grating pitch of the first diffraction grating and the second diffraction grating are nearly equal to a wavelength of the incident light. A limiting member is also included for limiting an incident region of the incident light with respect to the polarization diffraction element. The limiting member is formed on a light incident side of the first diffraction grating. Further, a converging lens is included for respectively converging light transmitted through the first diffraction grating and the second diffraction grating and light diffracted by the first diffraction grating and the second diffraction grating into different beam spots. Finally, a pair of photodetectors are included for detecting each optical intensity of the two beam spots converged by the converging lens.

摘要翻译： 偏振检测器包括具有彼此平行放置的具有两个相对表面的基板的偏振衍射元件，形成在基板的一个表面上的第一衍射光栅和形成在基板的另一表面上的第二衍射光栅， 光入射到第一衍射光栅上。 此外，第一衍射光栅和第二衍射光栅的每个光栅间距几乎等于入射光的波长。 还包括限制入射光相对于偏振衍射元件的入射区域的限制构件。 限制部件形成在第一衍射光栅的光入射侧。 此外，包括会聚透镜，用于分别会聚透过第一衍射光栅和第二衍射光栅的光以及由第一衍射光栅和第二衍射光栅衍射的光成为不同的光束点。 最后，包括一对光检测器，用于检测由会聚透镜会聚的两束光束的每个光强度。

公开(公告)号：US5085496A

公开(公告)日：1992-02-04

申请号：US500292

申请日：1990-03-28

申请人： Yoshio Yoshida ,  Takahiro Miyake ,  Yasuo Nakata ,  Yukio Kurata ,  Nobuo Ogata ,  Tetsuo Ueyama ,  Hideaki Sato

发明人： Yoshio Yoshida ,  Takahiro Miyake ,  Yasuo Nakata ,  Yukio Kurata ,  Nobuo Ogata ,  Tetsuo Ueyama ,  Hideaki Sato

IPC分类号： G02B5/18 ,  G11B7/135 ,  G11B11/105

CPC分类号： G11B7/1365 ,  G02B1/118 ,  G02B27/4261 ,  G02B27/4272 ,  G02B5/1809 ,  G02B5/1814 ,  G02B5/1866 ,  G11B11/10543 ,  G11B7/1353

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. 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 cancel out. The optical pickup device comprising the optical element includes a polarized light detecting unit provided with a diffraction grating which grating pitch is approximately equal to the wavelength of an incident light; a first photodetector that is mounted integrally and virtually in parallel with the substrate, and that receives a zero-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.

公开(公告)号：US5465315A

公开(公告)日：1995-11-07

申请号：US986052

申请日：1992-12-02

申请人： Keiji Sakai ,  Yoshio Yoshida ,  Hiroyuki Yamamoto ,  Yukio Kurata ,  Yasuo Nakata ,  Takahiro Miyake

发明人： Keiji Sakai ,  Yoshio Yoshida ,  Hiroyuki Yamamoto ,  Yukio Kurata ,  Yasuo Nakata ,  Takahiro Miyake

IPC分类号： G02B6/06 ,  G02F1/1333 ,  G09F9/305 ,  G02B6/08

CPC分类号： G02F1/13336 ,  G02B6/06 ,  G09F9/305 ,  Y10S385/901

摘要： A display apparatus of the invention includes: a plurality of display devices arranged in one direction, each of the plurality of display devices having a display area; and a plurality of image transmission means corresponding to the respective display devices, one end face of each of the image transmission means being coupled to a display area of the corresponding one of the display devices, other end faces of the image transmission means corresponding to the adjacent ones of the display devices being in contact with each other, the plurality of image transmission means being bent toward the one direction in which the display devices are arranged. Alternatively, a display apparatus of the invention includes: a plurality of display devices disposed in two directions, each of the plurality of display devices having a display area; a plurality of image transmission means corresponding to the respective display devices, one end face of each of the image transmission means being coupled to a display area of the corresponding one of the display devices, other end faces of the image transmission means corresponding to the adjacent ones of the display devices being in contact with each other, some of the plurality of image transmission means each having inward facing slopes and outward facing slopes on two pairs of opposing faces, the outward facing slopes of the image transmission means being directed to a direction in which the corresponding display device has no adjacent display devices.

摘要翻译： 本发明的显示装置包括：沿一个方向布置的多个显示装置，所述多个显示装置中的每一个具有显示区域; 以及对应于各个显示装置的多个图像传输装置，每个图像传输装置的一个端面耦合到相应的一个显示装置的显示区域，对应于图像传输装置的另一个端面 相邻的显示装置彼此接触，所述多个图像传输装置朝向显示装置布置的一个方向弯曲。 或者，本发明的显示装置包括：多个显示装置，其设置在两个方向上，所述多个显示装置中的每一个具有显示区域; 与各个显示装置对应的多个图像传输装置，每个图像传输装置的一个端面耦合到对应的一个显示装置的显示区域，图像传输装置的与相邻的显示装置相对应的另一个端面 所述显示装置中的一个相互接触，所述多个图像传输装置中的一些图像传输装置中的每一个在两对相对的面上具有向内的斜面和向外的斜面，所述图像传输装置的向外的斜面被引导到 其中相应的显示装置没有相邻的显示装置。

公开(公告)号：US5257131A

公开(公告)日：1993-10-26

申请号：US713840

申请日：1991-06-12

申请人： Yoshio Yoshida ,  Takahiro Miyake ,  Yasuo Nakata ,  Yukio Kurata

发明人： Yoshio Yoshida ,  Takahiro Miyake ,  Yasuo Nakata ,  Yukio Kurata

IPC分类号： G02B5/18 ,  G02B27/28 ,  G11B7/135 ,  G11B11/105 ,  G02B5/30 ,  G11B7/12

CPC分类号： G11B7/1353 ,  G02B27/28 ,  G02B27/283 ,  G02B27/4261 ,  G02B27/4272 ,  G02B5/1809 ,  G02B5/1814 ,  G11B11/10543

摘要： A polarization diffraction element comprising two diffraction gratings formed on both faces of a substrate respectively. Both the diffraction gratings have grating lines which are arranged at the same grating pitch, and whose directions mutually form a predetermined minute angle. The grating lines may also be arranged parallel to each other. In this case, the relationship between grating pitches D.sub.1, D.sub.2 of the respective diffraction gratings and the wavelength .lambda. of an incident light is expressed as:0

公开(公告)号：US5253237A

公开(公告)日：1993-10-12

申请号：US533401

申请日：1990-06-05

申请人： Takahiro Miyake ,  Yoshio Yoshida ,  Yukio Kurata ,  Yasuo Nakata ,  Katsuhiro Kubo

发明人： Takahiro Miyake ,  Yoshio Yoshida ,  Yukio Kurata ,  Yasuo Nakata ,  Katsuhiro Kubo

IPC分类号： G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/0916 ,  G11B7/0903 ,  G11B7/0912 ,  G11B7/13 ,  G11B7/1353

摘要： The invention discloses an optical head device having a diffraction grating element divided into a plurality of 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 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. The above arrangement enables to produce a small size optical head device and improve the detecting of focusing errors and tracking errors.

公开(公告)号：US5128914A

公开(公告)日：1992-07-07

申请号：US464013

申请日：1990-01-12

申请人： Yukio Kurata ,  Yoshio Yoshida ,  Yasuo Nakata ,  Takahiro Miyake

发明人： Yukio Kurata ,  Yoshio Yoshida ,  Yasuo Nakata ,  Takahiro Miyake

IPC分类号： G11B7/09 ,  G11B7/135

CPC分类号： G11B7/1381 ,  G11B7/0903 ,  G11B7/0916 ,  G11B7/094 ,  G11B7/1353

摘要： An optical pickup apparatus comprising a diffraction device in which a laser beam from a light source is diffracted by the diffraction device to produce a main beam and two sub-beams which are focused on a recording medium, the beams reflected from the recording medium aare diffracted by the diffraction device to be directed to at least one photodetector, whereby a tracking error signal can be detected from output signals of the photodetector by the three-spot method that is so highly reliable that an offset never arises in the tracking error signal even when the optical axis of the optical system is displaced from a given position.

公开(公告)号：US4812638A

公开(公告)日：1989-03-14

申请号：US78773

申请日：1987-07-28

申请人： Nobuo Ogata ,  Yasuo Nakata ,  Hideaki Satou ,  Toshiyuki Tanaka ,  Etsuji Minami ,  Yoshio Yoshida ,  Yukio Kurata ,  Teruaki Inoue, deceased

发明人： Nobuo Ogata ,  Yasuo Nakata ,  Hideaki Satou ,  Toshiyuki Tanaka ,  Etsuji Minami ,  Yoshio Yoshida ,  Yukio Kurata ,  Teruaki Inoue, deceased

IPC分类号： G11B7/09 ,  G11B7/135 ,  G01J1/20

CPC分类号： G11B7/22 ,  G11B7/0909 ,  G11B7/13922

摘要： A focusing error detector comprises a light source, a collimator lens for making parallel the pencil of rays emitted by the light source, an objective lens which focuses the parallel pencil of rays to form a beam spot on a data-recording disc with data tracks and guide tracks formed thereon and which receives the pencil of rays reflected from the data-recording disc, an optical system for forming a beam spot from the reflected pencil of rays incident to the objective lens, and an optical detector having a plurality of divided optical sensor blocks for receiving the formed beam spot so as to detect the focusing error of the beam spot formed on the data-recording disc on the basis of the configuration of the received beam spot.

摘要翻译： 聚焦误差检测器包括光源，用于使平行于光源发射的光线的准直透镜，物镜，其将平行的光线聚焦以形成具有数据轨迹的数据记录盘上的光点， 形成在其上的导轨，其接收从数据记录盘反射的光线，用于从入射到物镜的反射的射线形成束斑的光学系统;以及光学检测器，具有多个分开的光学传感器 用于接收形成的光束点的块，以便根据接收的光束点的配置来检测形成在数据记录盘上的光束点的聚焦误差。

公开(公告)号：US5283690A

公开(公告)日：1994-02-01

申请号：US503039

申请日：1990-04-02

申请人： Takahiro Miyake ,  Yoshio Yoshida ,  Yukio Kurata

发明人： Takahiro Miyake ,  Yoshio Yoshida ,  Yukio Kurata

IPC分类号： G02B5/18 ,  G11B7/135 ,  G02B27/44

CPC分类号： G11B7/1353 ,  G02B5/1814 ,  G02B5/1857 ,  G02B5/1871

摘要： An optical diffraction grating element comprising diffraction gratings having a configuration in which grooves and flat lands each positioned between the adjacent grooves are successively alternately formed, wherein the diffraction gratings have the same groove depth, groove width and groove tilt angle in order to obtain a constant 0th-order diffraction efficiency and first-order diffraction efficiency in the optical diffraction grating element while the pitches of the diffraction gratings are made different by setting a different land width for each diffraction grating.

摘要翻译： 一种光学衍射光栅元件，包括衍射光栅，该衍射光栅具有这样一种构造，其中相邻沟槽之间的槽和平坦的焊盘位于相邻的槽之间，其中衍射光栅具有相同的槽深度，槽宽度和槽倾斜角，以获得恒定的 光衍射光栅元件的0次衍射效率和一级衍射效率，而衍射光栅的间距通过为每个衍射光栅设定不同的焊盘宽度而不同。

公开(公告)号：US5428472A

公开(公告)日：1995-06-27

申请号：US114140

申请日：1993-08-31

申请人： Takahiro Miyake ,  Yoshio Yoshida ,  Yukio Kurata

发明人： Takahiro Miyake ,  Yoshio Yoshida ,  Yukio Kurata

IPC分类号： G02B5/18 ,  G11B7/135 ,  G02B27/44

CPC分类号： G11B7/1353 ,  G02B5/1814 ,  G02B5/1857 ,  G02B5/1871

摘要： An optical scan device comprising a light source and an optical diffraction grating element movable relatively to the light source, which is designed to substantially linearly scan a recording medium in a predetermined direction with a uniform light amount of a light beam emitted from the light source as the optical diffraction grating element moves relatively to the light source. The optical diffraction grating element comprising diffraction gratings having a configuration in which grooves and flat lands each positioned between the adjacent grooves are successively alternately formed, wherein the diffraction gratings have the same groove depth, groove width and groove tilt angle in order to obtain a constant 0th-order diffraction efficiency and first-order diffraction efficiency in the optical diffraction grating element while the pitches of the diffraction gratings are made different by setting a different land width for each diffraction grating.

摘要翻译： 一种光学扫描装置，包括光源和相对于光源可移动的光学衍射光栅元件，其被设计成以从光源发射的光束的均匀光量基本上沿预定方向线性扫描记录介质， 光学衍射光栅元件相对于光源移动。 光学衍射光栅元件包括衍射光栅，其具有连续交替形成沟槽和平坦的焊盘之间的构造，其中衍射光栅具有相同的槽深度，槽宽度和槽倾斜角，以获得常数 光衍射光栅元件的0次衍射效率和一级衍射效率，而衍射光栅的间距通过为每个衍射光栅设定不同的焊盘宽度而不同。

公开(公告)号：US5251280A

公开(公告)日：1993-10-05

申请号：US791660

申请日：1991-11-08

申请人： Atsushi Asada ,  Toshio Ishikawa ,  Yasuo Nakata ,  Yoshio Yoshida ,  Yukio Kurata

发明人： Atsushi Asada ,  Toshio Ishikawa ,  Yasuo Nakata ,  Yoshio Yoshida ,  Yukio Kurata

IPC分类号： G02B6/08 ,  G02F1/1333 ,  G02F1/1335 ,  G09F9/35 ,  G02B6/06

CPC分类号： G09F9/35 ,  G02B6/08 ,  G02F1/13336 ,  G02F1/133524

摘要： A liquid crystal display apparatus which includes display devices each having screens, an optical fiber bundle connected to the respective screens so as to transmit an image therethrough, wherein the optical fiber bundle includes optical fibers arranged side by side, fastened to each other, and bent so as to have a straight portion and branch portions, the straight portion being perpendicularly connected to an output end face, and the branch portions being connected to an input end face, and spacers interposed between adjacent optical fibers in a portion of the bundle at least toward the output end face of the display apparatus.