公开(公告)号：US6144623A

公开(公告)日：2000-11-07

申请号：US14980

申请日：1998-01-28

申请人： Yasuaki Inoue ,  Takenori Goto ,  Atsushi Tajiri ,  Kazushi Mori ,  Minoru Sawada ,  Akira Ibaraki ,  Masayuki Shono

发明人： Yasuaki Inoue ,  Takenori Goto ,  Atsushi Tajiri ,  Kazushi Mori ,  Minoru Sawada ,  Akira Ibaraki ,  Masayuki Shono

IPC分类号： G11B7/09 ,  G11B7/12 ,  G11B7/13 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/123 ,  G11B7/131 ,  G11B7/0912

摘要： A transmission-type holographic optical element has a four-segment holographic surface divided into four regions of equal areas by virtual dividing lines which are perpendicular to each other. The first dividing line is at an angle with respect to the track direction of an optical disk and the second dividing line is at an angle with respect to the radial direction of the optical disk before tracking phase adjustment. The first dividing line coincides with the track direction of the optical disk and the second dividing line coincides with the radial direction of the optical disk after tracking phase adjustment. A four-segment photodetection part is divided into four photodetection parts of equal areas by a dividing line substantially parallel to the radial direction of the optical disk and a dividing line perpendicular thereto. Parts of a main beam diffracted in two regions located on first diagonal positions of the four-segment holographic surface are condensed as condensed spots on adjacent positions of the first dividing line of the four-segment photodetection part on opposite sides, and parts of the main beam diffracted in the remaining two regions located on second diagonal positions are condensed as condensed spots on separate positions of the second dividing line of the four-segment photodetection part on opposite sides.

摘要翻译： 透射型全息光学元件具有通过彼此垂直的虚拟分割线被划分为相等面积的四个区域的四段全息表面。 第一分割线相对于光盘的轨道方向成一定角度，并且第二分割线在跟踪相位调整之前相对于光盘的径向方向成一定角度。 第一分割线与光盘的轨道方向一致，并且第二分割线在跟踪相位调整之后与光盘的径向一致。 四段光电检测部分通过基本上平行于光盘的径向的分割线和与其垂直的划分线分成四个具有相等面积的光电检测部分。 在四段全息表面的第一对角位置上的两个区域中衍射的主光束的部分在相对侧的四段光检测部分的第一分割线的相邻位置上被聚集为聚集点，主要部分 在位于第二对角位置的剩余两个区域中衍射的光束在相对侧的四段光检测部分的第二分割线的分离位置上被冷凝为聚光点。

公开(公告)号：US06212150B1

公开(公告)日：2001-04-03

申请号：US09027717

申请日：1998-02-23

申请人： Yasuaki Inoue ,  Takenori Goto ,  Atsushi Tajiri ,  Kazushi Mori ,  Minoru Sawada ,  Akira Ibaraki

发明人： Yasuaki Inoue ,  Takenori Goto ,  Atsushi Tajiri ,  Kazushi Mori ,  Minoru Sawada ,  Akira Ibaraki

IPC分类号： G11B700

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/123 ,  G11B7/1353

摘要： First and second photodiodes are arranged on the upper surface of a stem, returned light beams diffracted in the + 1st order by a transmission type holographic optical element are received by the first photodiode, while returned light beams diffracted in the − 1st order are received by the second photodiode. The first photodiode has a plurality of light receiving regions, and respectively outputs a reproducing signal, a focus error signal and a tracking error signal on the basis of the returned light beams. On the other hand, the second photodiode has a single light receiving region, and outputs a reproducing signal on the basis of the returned light beams.

摘要翻译： 第一和第二光电二极管布置在杆的上表面上，由透射型全息光学元件以+ 1次衍射的返回光束被第一光电二极管接收，而以-1次衍射的返回光束由 第二个光电二极管。 第一光电二极管具有多个光接收区域，并且基于返回的光束分别输出再现信号，聚焦误差信号和跟踪误差信号。 另一方面，第二光电二极管具有单个光接收区域，并且基于返回的光束输出再现信号。

公开(公告)号：US06339563B2

公开(公告)日：2002-01-15

申请号：US09725239

申请日：2000-11-29

申请人： Kazushi Mori ,  Atsushi Tajiri ,  Yasuaki Inoue ,  Takenori Goto ,  Minoru Sawada ,  Akira Ibaraki ,  Daisuke Ide

发明人： Kazushi Mori ,  Atsushi Tajiri ,  Yasuaki Inoue ,  Takenori Goto ,  Minoru Sawada ,  Akira Ibaraki ,  Daisuke Ide

IPC分类号： G11B7095

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

摘要： A grating surface of a diffraction grating diffracts a laser beam emitted from a semiconductor laser device in ±1st order directions. The grating surface is formed in a rectangular or elliptic shape in such dimensions that a light spot formed on an objective lens by ±1st order diffracted beams is located in an aperture of the objective lens and not displaced from the aperture even if the objective lens is horizontally moved in a tracking operation. A grating surface of another diffraction grating has a width smaller than the width of an overlap region of a light spot on the diffraction grating corresponding to a part of a beam, diffracted in the +1st direction, entering an objective lens and a light spot on the diffraction grating corresponding to a part of a beam, diffracted in the −1st direction, entering the objective lens.

摘要翻译： 衍射光栅的光栅表面衍射从半导体激光器件发射的激光束的±1级方向。 光栅表面形成为矩形或椭圆形，其尺寸使得物镜上形成的±1阶衍射光束的光点位于物镜的孔径中，即使物镜为 在跟踪操作中水平移动。 另一个衍射光栅的光栅表面的宽度小于衍射光栅上与光束的一部分相对应的光点的重叠区域的宽度，该光束的一部分在+ 1方向衍射，进入物镜和光点 衍射光栅对应于在第一方向衍射的光束的一部分，进入物镜。

公开(公告)号：US06501715B2

公开(公告)日：2002-12-31

申请号：US09998295

申请日：2001-12-03

申请人： Kazushi Mori ,  Atsushi Tajiri ,  Yasuaki Inoue ,  Takenori Goto ,  Minoru Sawada ,  Akira Ibaraki ,  Daisuke Ide

发明人： Kazushi Mori ,  Atsushi Tajiri ,  Yasuaki Inoue ,  Takenori Goto ,  Minoru Sawada ,  Akira Ibaraki ,  Daisuke Ide

IPC分类号： G11B7095

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

摘要： A grating surface of a diffraction grating diffracts a laser beam emitted from a semiconductor laser device in ±1st order directions. The grating surface is formed in a rectangular or elliptic shape in such dimensions that a light spot formed on an objective lens by ±1st order diffracted beams is located in an aperture of the objective lens and not displaced from the aperture even if the objective lens is horizontally moved in a tracking operation. A grating surface of another diffraction grating has a width smaller than the width of an overlap region of a light spot on the diffraction grating corresponding to a part of a beam, diffracted in the ±1st direction, entering an objective lens and a light spot on the diffraction grating corresponding to a part of a beam, diffracted in the −1st direction, entering the objective lens.

摘要翻译： 衍射光栅的光栅表面衍射从半导体激光器件发射的激光束的±1级方向。 光栅表面形成为矩形或椭圆形，其尺寸使得物镜上形成的±1阶衍射光束的光点位于物镜的孔径中，即使物镜为 在跟踪操作中水平移动。 另一个衍射光栅的光栅表面的宽度小于衍射光栅上与光束的一部分相对应的光点的重叠区域的宽度，该光束的一部分在±1度方向上衍射，进入物镜和光点 衍射光栅对应于在第一方向衍射的光束的一部分，进入物镜。

公开(公告)号：US06181667B2

公开(公告)日：2001-01-30

申请号：US09041008

申请日：1998-03-12

申请人： Kazushi Mori ,  Atsushi Tajiri ,  Yasuaki Inoue ,  Takenori Goto ,  Minoru Sawada ,  Akira Ibaraki ,  Daisuke Ide

发明人： Kazushi Mori ,  Atsushi Tajiri ,  Yasuaki Inoue ,  Takenori Goto ,  Minoru Sawada ,  Akira Ibaraki ,  Daisuke Ide

IPC分类号： G11B7135

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

摘要： A grating surface of a diffraction grating diffracts a laser beam emitted from a semiconductor laser device in ±1st order directions. The grating surface is formed in a rectangular or elliptic shape in such dimensions that a light spot formed on an objective lens by ±1st order diffracted beams is located in an aperture of the objective lens and not displaced from the aperture even if the objective lens is horizontally moved in a tracking operation. A grating surface of another diffraction grating has a width smaller than the width of an overlap region of a light spot on the diffraction grating corresponding to a part of a beam, diffracted in the +1st direction, entering an objective lens and a light spot on the diffraction grating corresponding to a part of a beam, diffracted in the −1st direction, entering the objective lens.

摘要翻译： 衍射光栅的光栅表面衍射从半导体激光器件发射的激光束的±1级方向。 光栅表面形成为矩形或椭圆形，其尺寸使得物镜上形成的±1阶衍射光束的光点位于物镜的孔径中，即使物镜为 在跟踪操作中水平移动。 另一个衍射光栅的光栅表面的宽度小于衍射光栅上与光束的一部分相对应的光点的重叠区域的宽度，该光束的一部分在+ 1方向衍射，进入物镜和光点 衍射光栅对应于在第一方向衍射的光束的一部分，进入物镜。

公开(公告)号：US6023448A

公开(公告)日：2000-02-08

申请号：US997742

申请日：1997-12-24

申请人： Atsushi Tajiri ,  Takenori Goto ,  Yasuaki Inoue ,  Kazushi Mori ,  Minoru Sawada ,  Akira Ibaraki

发明人： Atsushi Tajiri ,  Takenori Goto ,  Yasuaki Inoue ,  Kazushi Mori ,  Minoru Sawada ,  Akira Ibaraki

IPC分类号： G11B7/12 ,  G11B7/125 ,  G11B7/135 ,  G11B7/22 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/123 ,  G11B7/127 ,  G11B7/22

摘要： An optical pickup device has a case constructed by joining a lower frame member and an upper frame member. A semiconductor laser device, a three-beam generating diffraction grating, a transmission type holographic optical element, and a reflecting mirror are arranged in the lower frame member. A lead frame is arranged in the lower frame member. The semiconductor laser device is arranged on the lead frame through a heat sink, to emit laser light in a horizontal direction. A photodiode and the lead frame are arranged in the upper frame member. The photodiode has a light receiving surface parallel to the direction of light emission from the semiconductor laser device, and is mounted on the lead frame. The laser light emitted from the semiconductor laser device passes through the three-beam generating diffraction grating and the transmission type holographic optical element, and is then bent upward and introduced into an optical recording medium. Returned light reflected from a recording surface of the optical recording medium is changed in a direction parallel to the direction of light emission from the semiconductor laser device, passes through the transmission type holographic optical element and the three-beam generating diffraction grating again, is then changed vertically upward by the reflecting mirror, and is incident on the photodiode.

摘要翻译： 光学拾取装置具有通过连接下框架构件和上框架构件构成的壳体。 半导体激光装置，三光束产生衍射光栅，透射型全息光学元件和反射镜布置在下部框架构件中。 引导框架布置在下框架构件中。 半导体激光器件通过散热器布置在引线框架上，以沿水平方向发射激光。 光电二极管和引线框架布置在上框架构件中。 光电二极管具有与半导体激光装置的发光方向平行的受光面，安装在引线框上。 从半导体激光装置发射的激光通过三光束产生衍射光栅和透射型全息光学元件，然后向上弯曲并被引入光记录介质。 从光记录介质的记录表面反射的返回光在与半导体激光装置的发光方向平行的方向上变化，然后再次通过透射型全息光学元件和三光束产生衍射光栅 由反射镜垂直向上变化，入射到光电二极管上。

公开(公告)号：US06909687B2

公开(公告)日：2005-06-21

申请号：US09818653

申请日：2001-03-28

申请人： Kazushi Mori ,  Atsushi Tajiri ,  Toyozo Nishida ,  Yasuaki Inoue ,  Yasuhiro Ueda ,  Masayuki Shono ,  Minoru Sawada

发明人： Kazushi Mori ,  Atsushi Tajiri ,  Toyozo Nishida ,  Yasuaki Inoue ,  Yasuhiro Ueda ,  Masayuki Shono ,  Minoru Sawada

IPC分类号： G11B7/09 ,  G11B7/12 ,  G11B7/13 ,  G11B7/135 ,  G11B7/0065

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/0916 ,  G11B7/0943 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1381

摘要： A six-segment holographic surface is divided into regions by dividing lines. A four-segment photodetection part is divided into four photodetection parts equal in area by a section line substantially parallel to the radial direction of an optical disk and a section line orthogonal thereto. A main light beam diffracted in the regions of the six-segment holographic surface are condensed as spots at positions apart from each other on opposite sides on a section line of the four photodetection parts, and the main beam diffracted in the regions is condensed as spots in the center of the photodetection parts of the four-segment photodetection part.

摘要翻译： 六段全息面由分割线划分成多个区域。 四段光电检测部分通过基本上平行于光盘的径向的截面线和与其正交的截面线被划分为四个光电检测部分，其面积相等。 在六段全息表面的区域中衍射的主光束在四个光检测部的截面线的相对侧彼此分离的位置被冷凝，并且在该区域中衍射的主光束被聚光为斑点 在四段光电检测部分的光电检测部分的中心。

公开(公告)号：US6038203A

公开(公告)日：2000-03-14

申请号：US946591

申请日：1997-10-07

申请人： Atsushi Tajiri ,  Kazushi Mori ,  Yasuaki Inoue ,  Takenori Goto

发明人： Atsushi Tajiri ,  Kazushi Mori ,  Yasuaki Inoue ,  Takenori Goto

IPC分类号： G11B7/135 ,  G11B7/12 ,  G11B7/22 ,  G11B7/125

CPC分类号： G11B7/1353 ,  G11B7/123 ,  G11B7/22

摘要： A semiconductor laser device is mounted on the side of one end surface on lead frame in a recess of an insulating molding member, a three-beam generating diffraction grating is disposed in the center, and a transmission type holographic optical element is disposed on the side of the other end surface. After a flexible circuit board is fixed to the lower surfaces of leads and the lead frame, a photodiode for a signal detection is mounted on the surface of the flexible circuit board, and is so folded upward as to be perpendicular to the upper surface of the lead frame. The insulating molding member is mounted on the one end surface of the insulating molding member through a circular screw through a hole and an elliptic screw through a hole by screws.

摘要翻译： 半导体激光装置安装在绝缘模制构件的凹部中的引线框架的一个端面的侧面上，三光束产生衍射光栅设置在中心，透射型全息光学元件设置在侧面 的另一端面。 在柔性电路板固定到引线和引线框架的下表面之后，用于信号检测的光电二极管安装在柔性电路板的表面上，并且被向上折叠成垂直于 引线框架 绝缘成型构件通过圆孔螺钉穿过绝缘成型构件的一端表面安装，椭圆形螺钉通过螺钉穿过孔安装。

公开(公告)号：US5727009A

公开(公告)日：1998-03-10

申请号：US811457

申请日：1997-03-03

申请人： Atsushi Tajiri ,  Kazushi Mori ,  Keiichi Yodoshi ,  Takao Yamaguchi ,  Akira Ibaraki ,  Tatsuhiko Niina

发明人： Atsushi Tajiri ,  Kazushi Mori ,  Keiichi Yodoshi ,  Takao Yamaguchi ,  Akira Ibaraki ,  Tatsuhiko Niina

IPC分类号： G11B7/09 ,  G11B7/12 ,  G11B7/13 ,  G11B7/135 ,  G11B7/1353 ,  G11B7/22 ,  H01S3/00 ,  H01S5/00 ,  H01S5/022 ,  H01S5/30 ,  H01S3/19

CPC分类号： G11B7/22 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1362 ,  H01L2224/48091 ,  H01S5/005 ,  H01S5/02216 ,  H01S5/02248 ,  H01S5/02292

摘要： In an optical pickup apparatus, a laser beam emitted from a semiconductor laser device is reflected upward by a reflecting member, transmitted through a transmission type diffraction grating and split into at least three beams, and which beams are transmitted through a transmission type holographic optical element and condensed onto an optical recording medium by a condenser portion. A return beam reflected by the optical recording medium passes through the condenser portion and diffracted not to impinge upon the transmission type diffraction grating by the holographic optical element and directed to a photodetector portion of a light receiving device. The semiconductor laser device and the light receiving device are disposed in a mount member. The transmission type holographic optical element is supported by a supporting member three-dimensionally movably with respect to the mount member, and the supporting member or/and the holographic optical element is/are fixed with adhesive material with the transmission type holographic optical element being positioned with respect to the mount member.

摘要翻译： 在光学拾取装置中，从半导体激光装置发射的激光束被反射部件向上反射，通过透射型衍射光栅透射并分裂成至少三束光束，并且哪些光束通过透射型全息光学元件 并通过冷凝器部分冷凝到光学记录介质上。 由光记录介质反射的返回光束通过冷凝器部分，并通过全息光学元件衍射而不被撞击在透射型衍射光栅上并被引导到光接收装置的光电检测器部分。 半导体激光装置和光接收装置设置在安装构件中。 透射型全息光学元件由相对于安装构件三维地移动的支撑构件支撑，并且支撑构件或/和全息光学元件被固定有粘合材料，透射型全息光学元件被定位 相对于安装构件。

公开(公告)号：US07113316B2

公开(公告)日：2006-09-26

申请号：US11106600

申请日：2005-04-15

申请人： Kazushi Mori ,  Mitsuaki Matsumoto ,  Koji Tominaga ,  Atsushi Tajiri ,  Minoru Sawada

发明人： Kazushi Mori ,  Mitsuaki Matsumoto ,  Koji Tominaga ,  Atsushi Tajiri ,  Minoru Sawada

IPC分类号： G02B5/32

CPC分类号： G11B7/1353 ,  G02B5/32 ,  G11B7/0909 ,  G11B7/0916 ,  G11B7/131 ,  G11B7/133 ,  G11B7/22

摘要： In a holographic pattern provided in a holographic optical element, a pattern 1a twists a diffracted light beam in a clockwise direction, to form a semi-circular light spot Sa on photodetection parts A and B so as to extend over a dividing line LX in a four-segment photodetection part. A pattern 1b similarly twists the diffracted light beam in a clockwise direction, to form a semi-circular light spot Sb on photodetection parts C and D so as to extend over a dividing line LX in the four-segment photodetection part.

摘要翻译： 在设置在全息光学元件中的全息图案中，图案1a使顺时针方向的衍射光束转动，以在光检测部分A和B上形成半圆形光点Sa，以便在分光线LX上延伸 四段光电检测部件。 图案1b类似地沿着顺时针方向扭转衍射光束，以在光检测部分C和D上形成半圆形光点Sb，以便在四段光检测部分中的分界线LX上延伸。