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1. 发明授权

US5253237A Optical head device 失效
标题翻译：光头设备
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.

2. 发明授权

US5279924A Manufacturing method of optical diffraction grating element with serrated gratings having uniformly etched grooves 失效
$Manufacturing method of optical diffraction grating element with serrated gratings having uniformly etched grooves$
标题翻译：具有均匀蚀刻凹槽的锯齿形光栅的光学衍射光栅元件的制造方法
公开(公告)号：US5279924A
公开(公告)日：1994-01-18
申请号：US908866
申请日：1992-07-01
申请人： Keiji Sakai , Katsuhiro Kubo , Yukio Kurata , Takahiro Miyake , Yoshio Yoshida
发明人： Keiji Sakai , Katsuhiro Kubo , Yukio Kurata , Takahiro Miyake , Yoshio Yoshida
IPC分类号： G02B5/18 , G11B7/135 , G03C5/00
CPC分类号： G11B7/1353 , G02B5/1814 , G02B5/1857 , G02B5/1871
摘要： The method of manufacturing an optical diffraction grating element of the present invention is characterized in adopting an ion beam made from a gas chemically reacting with a glass substrate when forming a diffraction grating having a serrated profile upon the glass substrate through an ion beam etching method. Also, when manufacturing an optical diffraction grating element that is divided into a plurality of regions whereon diffraction gratings having different diffraction angles with respect to an incident light are provided, the method of the present invention is characterized in forming slits into a resist film disposed upon a transparent substrate such as a glass substrate, in accordance with the patterns of the diffraction gratings, such that the width of the slits is constant irrespectively of the regions. Accordingly, the method of manufacturing an optical diffraction grating element of the present invention enables to improve the diffraction efficiency of the optical diffraction grating element, and to enhance the optical efficiency of an optical head device. The SN ratio of the output signals released by the optical head device may be thus improved and the servo error control executed accurately.
摘要翻译：本发明的光学衍射光栅元件的制造方法的特征在于，在通过离子束蚀刻法在玻璃基板上形成具有锯齿状的衍射光栅时，采用由与玻璃基板发生化学反应的气体制成的离子束。此外，当制造被分成多个区域的光学衍射光栅元件，其中衍射光栅相对于入射光具有不同衍射角的衍射光栅时，本发明的方法的特征在于将狭缝形成为设置在根据衍射光栅的图案，诸如玻璃基板的透明基板，使得狭缝的宽度与区域无关地是恒定的。因此，本发明的光学衍射光栅元件的制造方法能够提高光学衍射光栅元件的衍射效率，提高光学头装置的光学效率。可以提高由光头装置释放的输出信号的SN比，并且精确地执行伺服误差控制。

3. 发明授权

US5465315A Display apparatus having a plurality of display devices 失效
标题翻译：具有多个显示装置的显示装置
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。

4. 发明授权

US5473470A Polarization detector 失效
标题翻译：极化探测器
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。

5. 发明授权

US5085496A Optical element and optical pickup device comprising it 失效
标题翻译：光学元件和包含它的光学拾取器件
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.

6. 发明授权

US5257131A Polarization diffraction element and polarization detector employing the same 失效
$Polarization diffraction element and polarization detector employing the same$
标题翻译：偏振衍射元件和采用其的偏振检测器
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

7. 发明授权

US5128914A Optical pickup apparatus utilizing a diffraction device 失效
$Optical pickup apparatus utilizing a diffraction device$
标题翻译：使用衍射装置的光学拾取装置
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.

8. 发明授权

US5428595A Optical information recording and reproducing device 失效
标题翻译：光信息记录和再现装置
公开(公告)号：US5428595A
公开(公告)日：1995-06-27
申请号：US9911
申请日：1993-01-27
申请人： Yoshio Yoshida , Hideaki Sato , Yukio Kurata , Hiroyuki Yamamoto , Nobuo Ogata , Katsuhiro Kubo
发明人： Yoshio Yoshida , Hideaki Sato , Yukio Kurata , Hiroyuki Yamamoto , Nobuo Ogata , Katsuhiro Kubo
IPC分类号： G11B7/09 , G11B7/135 , G11B17/32
CPC分类号： G11B7/1353
摘要： An optical information recording and reproducing device is provided. The device includes a light source for emitting a light beam, a first diffraction element for splitting the light beam into at least three diffracted beams, an optical system guiding the diffracted beams to a recording medium, and a second diffraction element including at least one division line and a diffraction surface from which the diffracted beams are diffracted. The diffraction surface is divided into at least two regions by the division line or lines. One of the division lines is at a predetermined angle against the direction of a track on the recording medium, and the regions split each of the diffracted beams into at least two parts to diffract the parts in different directions. The device also includes an optical detecting element for detecting the light beams diffracted with the second diffraction element.
摘要翻译：提供了一种光信息记录和再现装置。该装置包括用于发射光束的光源，用于将光束分成至少三个衍射光束的第一衍射元件，将衍射光束引导到记录介质的光学系统，以及包括至少一个分割部分的第二衍射元件线衍射面和衍射光束衍射的衍射面。通过划分线或线将衍射面分成至少两个区域。分割线之一与记录介质上的轨道的方向成预定角度，并且区域将每个衍射光束分成至少两个部分，以在不同方向上衍射该部分。该装置还包括用于检测与第二衍射元件衍射的光束的光学检测元件。

9. 发明授权

US4812638A Focusing error detector and optical data detecting device incorporating the focusing error detector 失效
标题翻译：聚焦误差检测器和结合了聚焦误差检测器的光学数据检测装置
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。

10. 再颁专利

USRE35332E Optical pickup device with diffraction device 失效
$Optical pickup device with diffraction device$
标题翻译：具有衍射装置的光学拾取装置
公开(公告)号：USRE35332E
公开(公告)日：1996-09-24
申请号：US123459
申请日：1993-09-17
申请人： Toshiya Nagahama , Yoshio Yoshida , Yasuo Nakata , Yukio Kurata
发明人： Toshiya Nagahama , Yoshio Yoshida , Yasuo Nakata , Yukio Kurata
IPC分类号： G11B7/09 , G11B7/135 , G01J1/20 , G11B7/00
CPC分类号： G11B7/1381 , G11B7/0916 , G11B7/1353
摘要： An optical pickup device in which a main beam and a pair of sub-beams are used and a diffraction device is disposed between a recording medium and a light receiving device such as a photodetector is disclosed. The diffraction device comprises first to third diffraction regions. The second and third regions receive light beams from the recording medium which are substantially identical in amount to each other. The light receiving device comprises a first to a fourth light receiving regions. The first and second light receiving regions are juxtaposed, and separated by a line. The main beam which has been diffracted by the first diffraction region is focused onto said line. The main beam which has been diffracted by the second diffraction region is focused onto the first light receiving region. The main beam which has been diffracted by the third diffracting region is focused onto the second light receiving region. The sub-beams which have been diffracted by the diffraction device are focused onto the third and fourth light receiving regions, respectively. Alternatively, the diffraction device comprises an area where one or more diffraction regions are formed. The farthest point of the area at the side of the light receiving device is separated from the optical axis by a predetermined distance, to prevent the first order diffracted beam from entering the optical system disposed between the diffraction device and a recording medium.
摘要翻译：公开了一种其中使用主光束和一对子光束并且在记录介质和诸如光电检测器的光接收装置之间设置衍射装置的光学拾取装置。衍射装置包括第一至第三衍射区域。第二和第三区域接收来自记录介质的光束彼此基本相同。光接收装置包括第一至第四光接收区域。第一和第二光接收区域并列并且被一行分开。已经被第一衍射区衍射的主光束被聚焦到所述线上。已经被第二衍射区域衍射的主光束被聚焦到第一光接收区域上。已经被第三衍射区域衍射的主光束被聚焦到第二光接收区域上。已经被衍射装置衍射的子光束分别聚焦在第三和第四光接收区上。或者，衍射装置包括形成一个或多个衍射区域的区域。光接收装置一侧的区域的最远点与光轴分开预定距离，以防止一级衍射光束进入设置在衍射装置和记录介质之间的光学系统。

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