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1. 发明授权

US06339563B2 Optical pickup apparatus capable of suppressing offset of a tracking error signal 失效
标题翻译：能够抑制跟踪误差信号偏移的光拾取装置
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。

2. 发明授权

US06501715B2 Optical pickup apparatus employing an adjusting circuit 失效
标题翻译：采用调整电路的光拾取装置
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。

3. 发明授权

US06181667B2 Optical pickup apparatus capable of suppressing offset of a tracking error signal 失效
标题翻译：能够抑制跟踪误差信号偏移的光拾取装置
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。

4. 发明授权

US6144623A Optical pickup apparatus and optical recording medium drive employing the same 失效
标题翻译：光拾取装置和采用该拾取装置的光记录介质驱动装置
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。

5. 发明授权

US06212150B1 Optical pickup apparatus and optical recording medium drive employing the same including a first photo receiving element for detecting the state of light beam and a second photo receiving element for reproducing information 失效
标题翻译：采用该光拾取装置和光记录介质的驱动装置包括用于检测光束状态的第一光接收元件和用于再现信息的第二光接收元件
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。

6. 发明授权

US6023448A Optical pickup device and optical recording medium driving apparatus comprising the same 失效
标题翻译：光学拾取装置和包括该拾取装置的光学记录介质驱动装置
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。

7. 发明授权

US5608752A Semiconductor laser device and method of designing the same 失效
标题翻译：半导体激光器件及其设计方法
公开(公告)号：US5608752A
公开(公告)日：1997-03-04
申请号：US430497
申请日：1995-04-28
申请人： Takenori Goto , Nobuhiko Hayashi , Teruaki Miyake , Mitsuaki Matsumoto , Kenichi Matsukawa , Daisuke Ide , Koutarou Furusawa , Akira Ibaraki , Keiichi Yodoshi , Tatsuya Kunisato
发明人： Takenori Goto , Nobuhiko Hayashi , Teruaki Miyake , Mitsuaki Matsumoto , Kenichi Matsukawa , Daisuke Ide , Koutarou Furusawa , Akira Ibaraki , Keiichi Yodoshi , Tatsuya Kunisato
IPC分类号： H01S5/00 , H01S5/065 , H01S5/223 , H01S5/227 , H01S3/19
CPC分类号： H01S5/2231 , H01S5/0658
摘要： In a semiconductor laser device comprising an n-type cladding layer, an active layer formed on the cladding layer, a p-type cladding layer formed on the active layer, and a p-type saturable light absorbing layer provided in the p-type cladding layer, the current confinement width for confining current injected into the active layer being W, the thickness d.sub.a of the active layer, the optical confinement factor .GAMMA..sub.a of the active layer, the thickness d.sub.s of the saturable light absorbing layer, the optical confinement factor .GAMMA..sub.s of the saturable light absorbing layer, and the light spot size S on a facet of the semiconductor laser device are so set as to satisfy a predetermined relationship. The reflectivity on a light output facet is set in the range of 10 to 20%.
摘要翻译：在包括n型包覆层，形成在包层上的有源层，形成在有源层上的p型包层和设置在p型包层中的p型可饱和光吸收层的半导体激光器件中，注入有源层的限流电流的限流宽度为W，有源层的厚度da，有源层的光限制因子GAMMA a，可饱和光吸收层的厚度ds，光限制因子可饱和光吸收层的GAMMA和半导体激光装置的面上的光斑尺寸S被设定为满足预定关系。光输出面的反射率设定在10〜20％的范围内。

8. 发明授权

US5416790A Semiconductor laser with a self-sustained pulsation 失效
标题翻译：具有自持脉冲的半导体激光器
公开(公告)号：US5416790A
公开(公告)日：1995-05-16
申请号：US147779
申请日：1993-11-04
申请人： Keiichi Yodoshi , Akira Ibaraki , Masayuki Shono , Shoji Honda , Takatoshi Ikegami , Nobuhiko Hayashi , Koutarou Furusawa , Atushi Tajiri , Toru Ishikawa , Kenichi Matsukawa , Teruaki Miyake , Takenori Goto , Mitsuaki Matsumoto , Daisuke Ide , Yasuyuki Bessho
发明人： Keiichi Yodoshi , Akira Ibaraki , Masayuki Shono , Shoji Honda , Takatoshi Ikegami , Nobuhiko Hayashi , Koutarou Furusawa , Atushi Tajiri , Toru Ishikawa , Kenichi Matsukawa , Teruaki Miyake , Takenori Goto , Mitsuaki Matsumoto , Daisuke Ide , Yasuyuki Bessho
IPC分类号： H01S5/065 , H01S5/20 , H01S5/223 , H01S5/32 , H01S3/19
CPC分类号： H01S5/20 , H01S5/2231 , H01S5/0658 , H01S5/2004 , H01S5/3211
摘要： A semiconductor laser with a self-sustained pulsation is disclosed in which a first cladding layer of first conductive type, an active layer and a second cladding layer of second conductive type having a striped ridge are formed in that order on a semiconductor substrate of first conductive type. The first and second cladding layers have a refractive index smaller than and a band gap larger than the active layer. A saturable optical absorbing layer having a band gap of energy substantially equal to the energy corresponding to lasing wavelength is formed in both the first and second cladding layers. Further, a barrier layer having a refractive index smaller than and a band gap larger than the first and second cladding layers is formed between the first cladding layer and the active layer and/or between the active layer and the second cladding layer.
摘要翻译：公开了一种具有自持脉动的半导体激光器，其中在第一导电半导体衬底上依次形成第一导电类型，有源层和具有条纹脊的第二导电类型的第二包层的第一包层类型。第一和第二覆层具有比有源层更大的折射率和更大的带隙。在第一和第二包层中均形成有具有基本上等于与激发波长相对应的能量的能隙带的饱和光吸收层。此外，在第一包层和有源层之间和/或有源层和第二包层之间形成折射率小于第一和第二包层的折射率的带隙的阻挡层。

9. 发明授权

US5727009A Semiconductor laser apparatus and optical pickup apparatus using the same 失效
标题翻译：半导体激光装置及使用其的光学拾取装置
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。

10. 发明授权

US5610096A Semiconductor laser with a self sustained pulsation 失效
标题翻译：具有自持脉冲的半导体激光器
公开(公告)号：US5610096A
公开(公告)日：1997-03-11
申请号：US536370
申请日：1995-09-29
申请人： Keiichi Yodoshi , Akira Ibaraki , Masayuki Shono , Shoji Honda , Takatoshi Ikegami , Nobuhiko Hayashi , Koutarou Furusawa , Atushi Tajiri , Toru Ishikawa , Kenichi Matsukawa , Teruaki Miyake , Takenori Goto , Mitsuaki Matsumoto , Daisuke Ide , Yasuyuki Bessho
发明人： Keiichi Yodoshi , Akira Ibaraki , Masayuki Shono , Shoji Honda , Takatoshi Ikegami , Nobuhiko Hayashi , Koutarou Furusawa , Atushi Tajiri , Toru Ishikawa , Kenichi Matsukawa , Teruaki Miyake , Takenori Goto , Mitsuaki Matsumoto , Daisuke Ide , Yasuyuki Bessho
IPC分类号： H01S5/065 , H01S5/20 , H01S5/223 , H01S5/32 , H01L21/20
CPC分类号： H01S5/20 , H01S5/2231 , H01S5/0658 , H01S5/2004 , H01S5/3211
摘要： A semiconductor laser with a self-sustained pulsation is disclosed in which a first cladding layer of first conductive type, an active layer and a second cladding layer of second conductive type having a striped ridge are formed in that order on a semiconductor substrate of first conductive type. The first and second cladding layers have a refractive index smaller than and a band gap larger than the active layer. A saturable optical absorbing layer having a band gap of energy substantially equal to the energy corresponding to lasing wavelength is formed in both the first and second cladding layers. Further, a barrier layer having a refractive index smaller than and a band gap larger than the first and second cladding layers is formed between the first cladding layer and the active layer and/or between the active layer and the second cladding layer.
摘要翻译：公开了一种具有自持脉动的半导体激光器，其中在第一导电半导体衬底上依次形成第一导电类型，有源层和具有条纹脊的第二导电类型的第二包层的第一包层类型。第一和第二覆层具有比有源层更大的折射率和更大的带隙。在第一和第二包层中均形成有具有基本上等于与激发波长相对应的能量的能隙带的饱和光吸收层。此外，在第一包层和有源层之间和/或有源层和第二包层之间形成折射率小于第一和第二包层的折射率的带隙的阻挡层。

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