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1. 再颁专利

USRE40954E1 Objective lens and optical head device 有权
公开(公告)号：USRE40954E1
公开(公告)日：2009-11-10
申请号：US10999236
申请日：2000-07-27
申请人： Tomohiko Sasano , Yasuhiro Tanaka , Michihiro Yamagata
发明人： Tomohiko Sasano , Yasuhiro Tanaka , Michihiro Yamagata
IPC分类号： G02B7/00
CPC分类号： G11B7/0956 , G02B27/0068 , G11B7/0933 , G11B7/0935 , G11B7/1374 , G11B7/13925 , G11B7/13927 , G11B7/22
摘要： An objective lens (1) for an optical disk, which focuses a light beam from a light source, is designed so that a third-order coma aberration generated when the objective lens is inclined at a unit angle is larger than a third-order coma aberration generated when the optical disk (2) is inclined at the unit angle, mounted on an actuator for inclining the objective lens according to an inclination amount of the optical disk, and used. With this structure, it is possible to obtain an objective lens for an optical disk that has a large numerical aperture and is easy to manufacture and assemble, and in which the third-order coma aberration generated when the optical disk surface is inclined owing to a warp or the like can be corrected by small inclination of the objective lens, so as to reduce a residual astigmatism, which is generated according to the inclination amount, after the correction.

2. 发明授权

US07602561B2 Optical head apparatus and optical information recording and reproduction apparatus 有权
标题翻译：光头装置和光信息记录和再现装置
公开(公告)号：US07602561B2
公开(公告)日：2009-10-13
申请号：US11620086
申请日：2007-01-05
申请人： Yasuhiro Tanaka , Tomohiko Sasano , Michihiro Yamagata , Daisuke Ogata
发明人： Yasuhiro Tanaka , Tomohiko Sasano , Michihiro Yamagata , Daisuke Ogata
IPC分类号： G02B9/04
CPC分类号： G11B7/1353 , G11B7/1376 , G11B7/1378 , G11B7/13925 , G11B7/13927 , G11B2007/0006 , G11B2007/0013 , G11B2007/13727
摘要： Disclosed is an optical head apparatus comprising: a light source; a collimating means of converting a beam of light emitted from the light source into a substantially parallel beam of light; a focusing means of focusing the light onto an information medium surface; a beam splitting means of splitting the beam of light modulated by the information medium; and a light receiving means of receiving the light modulated by the information medium, wherein a lens having a negative power and a lens having a positive power are arranged in this order as viewed from the collimating means side between the collimating means and the focusing means, and at least either one of the lenses is moved along an optical axis to correct spherical aberration occurring on the information medium surface, and wherein the distance from the lens having the positive power to the focusing means is set substantially equal to the focal length of the lens having the positive power.
摘要翻译：公开了一种光头装置，包括：光源; 将从光源发射的光束转换为基本上平行的光束的准直装置; 将光聚焦到信息介质表面上的聚焦装置; 分束装置，用于分割由信息介质调制的光束; 以及光接收装置，其接收由所述信息介质调制的光，其中从所述准直装置和所述聚焦装置之间的所述准直装置侧观察，以所述顺序布置具有负光焦度的透镜和具有正光焦度的透镜，并且透镜中的至少一个沿光轴移动以校正在信息介质表面上出现的球面像差，并且其中从具有正功率的透镜到聚焦装置的距离被设定为基本上等于透镜具有正光焦度。

3. 发明授权

US07177101B2 Optical head apparatus and optical information recording and reproduction apparatus 有权
标题翻译：光头装置和光信息记录和再现装置
公开(公告)号：US07177101B2
公开(公告)日：2007-02-13
申请号：US10486003
申请日：2002-08-07
申请人： Yasuhiro Tanaka , Tomohiko Sasano , Michihiro Yamagata , Daisuke Ogata
发明人： Yasuhiro Tanaka , Tomohiko Sasano , Michihiro Yamagata , Daisuke Ogata
IPC分类号： G02B9/04 , G11B7/00
CPC分类号： G11B7/1353 , G11B7/1376 , G11B7/1378 , G11B7/13925 , G11B7/13927 , G11B2007/0006 , G11B2007/0013 , G11B2007/13727
摘要： Disclosed is an optical head apparatus comprising: a light source; a collimating means of converting a beam of light emitted from the light source into a substantially parallel beam of light; a focusing means of focusing the light onto an information medium surface; a beam splitting means of splitting the beam of light modulated by the information medium; and a light receiving means of receiving the light modulated by the information medium, wherein a lens having a negative power and a lens having a positive power are arranged in this order as viewed from the collimating means side between the collimating means and the focusing means, and at least either one of the lenses is moved along an optical axis to correct spherical aberration occurring on the information medium surface, and wherein the distance from the lens having the positive power to the focusing means is set substantially equal to the focal length of the lens having the positive power.
摘要翻译：公开了一种光头装置，包括：光源; 将从光源发射的光束转换为基本上平行的光束的准直装置; 将光聚焦到信息介质表面上的聚焦装置; 分束装置，用于分割由信息介质调制的光束; 以及光接收装置，其接收由所述信息介质调制的光，其中从所述准直装置和所述聚焦装置之间的准直装置侧观察，以所述顺序布置具有负光焦度的透镜和具有正光焦度的透镜，并且透镜中的至少一个沿光轴移动以校正在信息介质表面上发生的球面像差，并且其中从具有正功率的透镜到聚焦装置的距离被设定为基本上等于透镜具有正光焦度。

4. 发明授权

US06807017B2 Objective lens and optical head device 有权
标题翻译：物镜和光头设备
公开(公告)号：US06807017B2
公开(公告)日：2004-10-19
申请号：US10269288
申请日：2002-10-11
申请人： Tomohiko Sasano , Yasuhiro Tanaka , Michihiro Yamagata
发明人： Tomohiko Sasano , Yasuhiro Tanaka , Michihiro Yamagata
IPC分类号： G02B302
CPC分类号： G11B7/0956 , G02B27/0068 , G11B7/0933 , G11B7/0935 , G11B7/1374 , G11B7/13925 , G11B7/13927 , G11B7/22
摘要： An objective lens (1) for an optical disk, which focuses a light beam from a light source, is designed so that a third-order coma aberration generated when the objective lens is inclined at a unit angle is larger than a third-order coma aberration generated when the optical disk (2) is inclined at the unit angle, mounted on an actuator for inclining the objective lens according to an inclination amount of the optical disk, and used. With this structure, it is possible to obtain an objective lens for an optical disk that has a large numerical aperture and is easy to manufacture and assemble, and in which the third-order coma aberration generated when the optical disk surface is inclined owing to a warp or the like can be corrected by small inclination of the objective lens, so as to reduce a residual astigmatism, which is generated according to the inclination amount, after the correction.
摘要翻译：设计了用于聚焦来自光源的光束的用于光盘的物镜（1），使得当物镜以单位角度倾斜时产生的三阶彗差大于三阶彗差并且使用在光盘（2）以单位角倾斜时产生的像差，安装在用于使物镜倾斜的致动器上。利用这种结构，可以获得具有大数值孔径并且易于制造和组装的光盘用物镜，并且其中当光盘表面由于光盘表面倾斜而产生的三次彗差翘曲等可以通过物镜的小倾斜来校正，以便在校正之后减少根据倾斜量产生的残余像散。

5. 发明授权

US06504975B1 Coupling lens and semiconductor laser module 失效
标题翻译：耦合透镜和半导体激光模块
公开(公告)号：US06504975B1
公开(公告)日：2003-01-07
申请号：US09554649
申请日：2000-05-17
申请人： Michihiro Yamagata , Yasuhiro Tanaka , Hiroyuki Asakura , Tomohiko Sasano
发明人： Michihiro Yamagata , Yasuhiro Tanaka , Hiroyuki Asakura , Tomohiko Sasano
IPC分类号： G02B632
CPC分类号： G02B6/4204 , G02B5/1876 , G02B6/4206 , G02B6/424 , G02B6/4244 , G02B2006/4297 , H01S5/005 , H01S5/02212 , H01S5/02284
摘要： A coupling lens (104) of the present invention is used for coupling a beam of light emitted from a semiconductor laser (101) to an optical fiber (108). The coupling lens (104) is formed of a single lens, and a diffraction lens formed of concentric zones is integrated on an incident surface or an exit surface of the single lens. The diffraction lens has a positive refracting power, a relief function of the diffraction lens has an approximately isosceles triangular shape, and a depth W of the relief function satisfies the following formula: 0.6≦W(n−1)/&lgr;≦1.0 where n denotes a refractive index of a material of the lens and &lgr; represents a wavelength of the semiconductor laser. When the coupling lens is used as a coupling lens for a semiconductor laser module, the intensity of light emitted from the module is allowed to comply with a safety standard without using an attenuation film or a polarizer, or a control circuit for stopping emission of the laser automatically when the optical fiber comes off.
摘要翻译：本发明的耦合透镜（104）用于将从半导体激光器（101）发射的光束耦合到光纤（108）。耦合透镜（104）由单个透镜形成，并且由同心区形成的衍射透镜集成在单透镜的入射表面或出射表面上。衍射透镜具有正折射率，衍射透镜的浮雕功能具有近似等腰三角形形状，并且凹凸函数的深度W满足下式：其中n表示透镜材料的折射率和l 表示半导体激光器的波长。当耦合透镜用作半导体激光器模块的耦合透镜时，从模块发射的光的强度允许符合安全标准而不使用衰减膜或偏振器，或者用于停止发射的控制电路当光纤脱落时自动激光。

6. 发明授权

US06590717B2 Optical system for optical disk, optical head unit for optical disk, and optical drive device 失效
标题翻译：用于光盘的光学系统，用于光盘的光头单元和光驱装置
公开(公告)号：US06590717B2
公开(公告)日：2003-07-08
申请号：US10129234
申请日：2002-05-02
申请人： Tomohiko Sasano , Yasuhiro Tanaka , Michihiro Yamagata
发明人： Tomohiko Sasano , Yasuhiro Tanaka , Michihiro Yamagata
IPC分类号： G02B1318
CPC分类号： G11B7/13927 , G11B7/1374 , G11B7/13922
摘要： An optical system for an optical disk, comprising a light source (61), a collimating optical system (63) for converting a luminous flux from the light source into parallel rays of light, and an object lens (66) for condensing the parallel rays onto the information recording surface (71) of an optical disk. The object lens consisting of two or three lenses and having a numerical aperture (NA) of at least 0.82 enables a high-density recording. Since a third-order astigmatism produced when the object lens is tilted 0.7 degree with respect to an optical axis is as small as up to 10 m lambda, a residual aberration, after a third-order comatic aberration produced when the optical disk is tilted due to warping or the like is corrected by tilting the optical lens, can be reduced. Therefore, a tilted optical disk still can ensure a satisfactory recording and/or reproducing quality.
摘要翻译：一种用于光盘的光学系统，包括光源（61），用于将来自光源的光通量转换为平行光线的准直光学系统（63）和用于将平行光线到光盘的信息记录表面（71）上。由两个或三个透镜组成的具有至少0.82的数值孔径（NA）的物镜能够进行高密度记录。由于当物镜相对于光轴倾斜0.7度时产生的三阶像散小至高达10mλ，所以当光盘倾斜时产生三阶彗差之后的残余像差可以通过使光学透镜倾斜来矫正翘曲等。因此，倾斜的光盘仍然可以确保令人满意的记录和/或再现质量。

7. 发明授权

US06349000B1 Device for calculating diffraction efficiencies of a diffraction lens, lens with grating element, and optical system for reading 有权
$Device for calculating diffraction efficiencies of a diffraction lens, lens with grating element, and optical system for reading$
标题翻译：用于计算衍射透镜，具有光栅元件的透镜和用于读取的光学系统的衍射效率的装置
公开(公告)号：US06349000B1
公开(公告)日：2002-02-19
申请号：US09154355
申请日：1998-09-16
申请人： Michihiro Yamagata , Kazutake Boku , Yasuhiro Tanaka , Tomohiko Sasano , Shusuke Ono
发明人： Michihiro Yamagata , Kazutake Boku , Yasuhiro Tanaka , Tomohiko Sasano , Shusuke Ono
IPC分类号： G02B518
CPC分类号： G02B5/1895 , G02B5/1876
摘要： A device for calculating diffraction efficiencies of a diffraction lens divided into a plurality of regions, each region comprising at least one grating ring, comprises a first memory for storing information about diffraction efficiencies of the regions; a second memory for storing information about weights corresponding to the regions; and a first processor for retrieving information from the first and the second memory, and calculating diffraction efficiencies of the entire diffraction lens using the formula E j = ∑ m = 1 M ⁢ W m ⁢ η mj ( 1 ) wherein: j: integer indicating the order of diffraction light Ej: diffraction efficiency for j-th order diffraction light of the diffraction lens M: positive integer (M>1) indicating the number of regions for which the diffraction efficiency is calculated m: index of the region for which the diffraction efficiency is calculated &eegr;mj: diffraction efficiency for the j-th order diffraction light of the m-th region (stored in the first memory) Wm: weight for the m-th region (stored in the second memory means). Thus, the diffraction efficiency of the diffraction lens can be calculated easily.
摘要翻译：一种用于计算分成多个区域的衍射透镜的衍射效率的装置，每个区域包括至少一个光栅环，包括用于存储关于所述区域的衍射效率的信息的第一存储器; 第二存储器，用于存储与所述区域对应的权重的信息; 以及第一处理器，用于从第一和第二存储器检索信息，并且使用公式计算衍射透镜的衍射效率：j：表示衍射光的次数的整数Ej：衍射的第j级衍射光的衍射效率透镜M：表示计算衍射效率的区域数的正整数（M> 1）m：衍射效率计算区域的折射率jj第m区的第j级衍射光的衍射效率（存储在第一存储器中）Wm：第m区域的重量（存储在第二存储装置中）。因此，可以容易地计算衍射透镜的衍射效率。

8. 发明授权

US07782540B2 Optical head apparatus and optical information recording and reproduction apparatus 有权
标题翻译：光头装置和光信息记录和再现装置
公开(公告)号：US07782540B2
公开(公告)日：2010-08-24
申请号：US11620094
申请日：2007-01-05
申请人： Yasuhiro Tanaka , Tomohiko Sasano , Michihiro Yamagata , Daisuke Ogata
发明人： Yasuhiro Tanaka , Tomohiko Sasano , Michihiro Yamagata , Daisuke Ogata
IPC分类号： G02B13/22 , G02B9/12 , G02B9/14 , G02B9/04 , G11B7/135
CPC分类号： G11B7/1353 , G11B7/1376 , G11B7/1378 , G11B7/13925 , G11B7/13927 , G11B2007/0006 , G11B2007/0013 , G11B2007/13727
摘要： Disclosed is an optical head apparatus comprising: a light source; a collimating means of converting a beam of light emitted from the light source into a substantially parallel beam of light; a focusing means of focusing the light onto an information medium surface; a beam splitting means of splitting the beam of light modulated by the information medium; and a light receiving means of receiving the light modulated by the information medium, wherein a lens having a negative power and a lens having a positive power are arranged in this order as viewed from the collimating means side between the collimating means and the focusing means, and at least either one of the lenses is moved along an optical axis to correct spherical aberration occurring on the information medium surface, and wherein the distance from the lens having the positive power to the focusing means is set substantially equal to the focal length of the lens having the positive power.
摘要翻译：公开了一种光头装置，包括：光源; 将从光源发射的光束转换为基本上平行的光束的准直装置; 将光聚焦到信息介质表面上的聚焦装置; 分束装置，用于分割由信息介质调制的光束; 以及光接收装置，其接收由所述信息介质调制的光，其中从所述准直装置和所述聚焦装置之间的准直装置侧观察，以所述顺序布置具有负光焦度的透镜和具有正光焦度的透镜，并且透镜中的至少一个沿光轴移动以校正在信息介质表面上发生的球面像差，并且其中从具有正功率的透镜到聚焦装置的距离被设定为基本上等于透镜具有正光焦度。

9. 发明申请

US20050018586A1 Objective lens for optical disk, optical head device and optical information recording and reproducing apparatus using the same, and mold for molding lens, method for working the mold for molding lens, and profile measuring device for measuring profile of the mold for molding lens 失效
标题翻译：用于光盘的物镜，光学头装置和使用该物镜的光学信息记录和再现装置，以及用于成型透镜的模具，用于模制成型透镜的模具的方法以及用于测量用于成型透镜的模具的轮廓的轮廓测量装置
公开(公告)号：US20050018586A1
公开(公告)日：2005-01-27
申请号：US10922656
申请日：2004-08-19
申请人： Yasuhiro Tanaka , Michihiro Yamagata , Tomohiko Sasano
发明人： Yasuhiro Tanaka , Michihiro Yamagata , Tomohiko Sasano
IPC分类号： B24B19/20 , C03B11/08 , G01B21/20 , G02B13/18 , G11B7/00 , G11B7/135
CPC分类号： C03B11/084 , B24B19/20 , C03B11/08 , C03B11/082 , C03B2215/07 , C03B2215/41 , C03B2215/49 , C03B2215/72 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： An objective lens for an optical disk including one lens and capable of satisfying an excellent focusing property on any of two kinds of optical disks each having a different thickness. The objective lens (2) is formed of a single lens having aspheric surfaces on both sides with the surface (3) at the side of the light source a rotationally symmetric aspheric surface. Furthermore, the surface at the side of the optical disk (6) of the objective lens (2) is divided into an inner circumference region (4) and an outer circumference region (5) and a surface (7) forming the difference in level of about 0.3 μm that is provided in parallel to the optical axis (in the direction of the optical axis) at the boundary between the inner circumference region (4) and the outer circumference region (5). The spherical aberration is corrected by the inner circumference region (4) and outer circumference (5) of the objective lens (2) corresponding to the optical disks having a different thickness.
摘要翻译：一种用于包括一个透镜的光盘的物镜，并且能够在各自具有不同厚度的两种光盘中的任何一种上满足优异的聚焦特性。物镜（2）由具有在两侧具有非球面的单个透镜形成，光源侧的表面（3）是旋转对称的非球面。此外，物镜（2）的光盘（6）侧的表面被分成内周区域（4）和外周区域（5）和形成水平差的表面（7）在内周区域（4）和外周区域（5）之间的边界处平行于光轴（沿光轴方向）设置约0.3μm。通过与具有不同厚度的光盘对应的物镜（2）的内周区域（4）和外周（5）校正球面像差。

10. 发明授权

US06627869B2 Beam shaper, and semiconductor laser source device and optical head using the beam shaper 失效
公开(公告)号：US06627869B2
公开(公告)日：2003-09-30
申请号：US10131720
申请日：2002-04-24
申请人： Yasuhiro Tanaka , Michihiro Yamagata , Tomohiko Sasano
发明人： Yasuhiro Tanaka , Michihiro Yamagata , Tomohiko Sasano
IPC分类号： H01J314
CPC分类号： G02B27/0955 , G02B27/09 , G02B27/0911 , G11B7/1378 , G11B7/13922 , G11B7/1398
摘要： A beam shaper is made up of a single lens whose both surfaces are toric surfaces. Assuming that directions where the beam divergence angle are larger and smaller in the far field from the semiconductor laser source are referred to as the vertical and horizontal directions, respectively, both of the toric surfaces have aspheric surfaces in a cross-section in the vertical direction, both of the toric surfaces have spherical surfaces in a cross-section in the horizontal direction, and both centers of curvature of the spherical surfaces are located substantially at a luminous point of the semiconductor laser source.

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