公开(公告)号：US06272099B1

公开(公告)日：2001-08-07

申请号：US09550648

申请日：2000-04-14

申请人： Sadao Mizuno ,  Yoshiaki Komma

发明人： Sadao Mizuno ,  Yoshiaki Komma

IPC分类号： G11B700

CPC分类号： G11B7/1381 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

摘要： The objective lens of the present invention includes a center portion and a periphery portion surrounding the center portion. An aberration of the periphery portion is corrected such that a light spot is formed by the convergence of a luminous flux which has been transmitted through the periphery portion and then transmitted through a first light transmissive flat plate, and an aberration of the center portion is corrected such that a light spot is formed by the convergence of a luminous flux which has been transmitted through the center portion and then transmitted through a second light transmissive flat plate which is thicker than the first light transmissive flat plate.

摘要翻译： 本发明的物镜包括围绕中心部分的中心部分和周边部分。 校正周边部分的像差，使得通过已透射通过周边部分然后透射通过第一透光平板的光束的会聚而形成光斑，并且校正中心部分的像差 使得通过已经透射通过中心部分然后透射通过比第一透光平板厚的第二透光平板的光束的会聚形成光点。

公开(公告)号：US5986779A

公开(公告)日：1999-11-16

申请号：US695397

申请日：1996-08-12

申请人： Yasuhiro Tanaka ,  Michihiro Yamagata ,  Yoshiaki Komma ,  Sadao Mizuno

发明人： Yasuhiro Tanaka ,  Michihiro Yamagata ,  Yoshiaki Komma ,  Sadao Mizuno

IPC分类号： G02B5/18 ,  G02B27/00 ,  G11B7/00 ,  G11B7/135 ,  G02B5/32

CPC分类号： G02B5/1895 ,  G02B27/0037 ,  G02B27/4238 ,  G02B5/1876 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： Coma of an objective lens occurs depending on the lens-forming condition when plural disks of different substrate thickness are recorded and reproduced. An objective lens according to this invention is not influenced by the coma even if the thickness of the substrates is changed. For this purpose, a diffraction grating whose aberration is corrected is formed on the first side of an aspheric objective lens. Due to this correction, light beams having different diffraction orders, e.g. 0th order diffracted light and +1st order diffracted light, are focused respectively on two kinds of substrates of different thickness. The whole objective lens is tilted to correct its axial coma, and the tilt angle is predetermined to be substantially identical with respect to plural substrates which are different in thickness.

摘要翻译： 当记录和再现不同基板厚度的多个盘时，根据透镜形成条件发生物镜的昏迷。 即使基板的厚度发生变化，根据本发明的物镜也不受彗形影响。 为此目的，在非球面物镜的第一侧上形成像差校正的衍射光栅。 由于这种校正，具有不同衍射级的光束，例如， 0级衍射光和+ 1级衍射光分别聚焦在两种不同厚度的基板上。 整个物镜倾斜以校正其轴向彗差，并且倾斜角度相对于厚度不同的多个基板预定为基本相同。

公开(公告)号：US5815293A

公开(公告)日：1998-09-29

申请号：US455934

申请日：1995-05-31

申请人： Yoshiaki Komma ,  Sadao Mizuno ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Sadao Mizuno ,  Seiji Nishino

IPC分类号： G02B3/10 ,  G02B5/18 ,  G02B5/32 ,  G02B21/02 ,  G02B21/18 ,  G02B21/20 ,  G03F9/00 ,  G11B7/00 ,  G11B7/085 ,  G11B7/13 ,  G11B7/135 ,  G11B19/12 ,  G02B3/08 ,  G02B7/00

CPC分类号： G02B5/1895 ,  G02B21/025 ,  G02B21/18 ,  G02B21/20 ,  G02B27/4238 ,  G02B3/10 ,  G02B5/18 ,  G02B5/1814 ,  G02B5/1842 ,  G02B5/1871 ,  G02B5/1876 ,  G02B5/32 ,  G03F9/70 ,  G03F9/7049 ,  G03F9/7069 ,  G03F9/7088 ,  G11B19/12 ,  G11B19/127 ,  G11B7/08511 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/139 ,  G11B2007/0006 ,  G11B2007/13727

摘要： A compound objective lens is composed of a hologram lens or transmitting a part of incident light without any diffraction to form a beam of transmitted light and diffracting a remaining part of the incident light to form a beam of first-order diffracted light, and an objective lens for converging the transmitted light to form a first converging spot on a front surface of a thin type of first information medium and converging the diffracted light to form a second converging spot on a front surface of a thick type of second information medium. Because the hologram selectively functions as a concave lens for the diffracted light, a curvature of the transmitted light differs from that of the diffracted light. Therefore, even though the first and second information mediums have different thicknesses, the transmitted light incident on rear surface of the first information medium is converged on the its front surface, and the diffracted light incident on a rear surface of the second information medium is converged on the its front surface. That is, the compound objective lens has two focal points.

摘要翻译： 复合物镜由全息透镜构成或透射入射光的一部分而没有任何衍射形成透射光束，衍射入射光的剩余部分以形成一级衍射光束，目标 透镜，用于会聚透射光以在薄型第一信息介质的前表面上形成第一会聚点，并且会聚衍射光以在厚型第二信息介质的前表面上形成第二会聚点。 由于全息图有选择地用作衍射光的凹透镜，透射光的曲率与衍射光的曲率不同。 因此，即使第一信息介质和第二信息介质具有不同的厚度，入射在第一信息介质的后表面上的透射光会聚在其前表面上，并且入射在第二信息介质的后表面上的衍射光会聚 在其前面。 也就是说，复合物镜具有两个焦点。

公开(公告)号：US5644413A

公开(公告)日：1997-07-01

申请号：US501351

申请日：1995-07-12

申请人： Yoshiaki Komma ,  Sadao Mizuno ,  Makoto Kato ,  Hidenori Wada ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Sadao Mizuno ,  Makoto Kato ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G02B5/18 ,  G02B5/32 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G02B5/1876 ,  G02B5/32 ,  G11B7/126 ,  G11B7/127 ,  G11B7/1359 ,  G11B7/1376 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/0912 ,  Y10S359/90

摘要： An optical head apparatus consists of a semiconductor laser for radiating a light beam, a first collimator lens for collimating the light beam, a wedge-like prism for reshaping the light beam, a beam splitter for transmitting the light beam in an outgoing path and splitting the light beam in an incoming path, an objective lens for converging the light beam at an information medium in which information is stored, a plane type of hologram lens integrally formed with the objective lens for excessively correcting chromatic aberration of the objective lens to cancel out chromatic aberration of the collimator lens, a second collimator lens for converging the light beam split, a photo detector for detecting intensity of the light beam converged to obtain an information signal and servo signals, and an actuating unit for slightly moving the objective lens and the hologram lens according to the servo signals. A wavelength of the light beam is lengthened as intensity of the light beam is increased. Even though an astigmatic difference occurs in the semiconductor laser, the change of a focal length of the collimator lens cancels out the change of the astigmatic difference to prevent the occurrence of astigmatic aberration.

摘要翻译： 光头装置由用于照射光束的半导体激光器，用于准直光束的第一准直透镜，用于整形光束的楔形棱镜，用于在输出路径中传输光束的分束器和分离器 入射路径中的光束，用于在存储信息的信息介质处会聚光束的物镜，与物镜整体形成的平面型全息透镜，用​​于过度校正物镜的色差以抵消 准直透镜的色差，用于会聚光束的第二准直透镜，用于检测会聚的光束的强度的光检测器，以获得信息信号和伺服信号，以及用于使物镜稍微移动的致动单元 全息透​​镜根据伺服信号。 当光束的强度增加时，光束的波长被延长。 即使在半导体激光器中出现散像差异，准直透镜的焦距的变化抵消像散差的变化，从而防止散光像差的发生。

公开(公告)号：US08184522B2

公开(公告)日：2012-05-22

申请号：US12983427

申请日：2011-01-03

申请人： Hidenori Wada ,  Sadao Mizuno ,  Yoshiaki Komma ,  Keiichi Matsuzaki

发明人： Hidenori Wada ,  Sadao Mizuno ,  Yoshiaki Komma ,  Keiichi Matsuzaki

IPC分类号： G11B7/00

CPC分类号： G11B7/12 ,  G11B7/1356

摘要： An optical head for recording or reproducing a signal on or from an optical recording medium including a light source, an objective lens for condensing light emitted from the light source to the optical recording medium, and a light-separating device arranged between the light source and the objective lens in order to separate the light reflected from the optical recording medium from the light emitted from the light source. The light-separating device includes a first glass, a multilayer film formed on the first glass, and an adhesive layer arranged on the multilayer film in order to bond a second glass onto the multilayer film. The majority of the light emitted from the light source enters into the light-separating device through the first glass and is reflected by the multilayer film.

摘要翻译： 一种用于在包括光源的光记录介质上或从光记录介质上记录或再现信号的光学头，用于将从光源发射的光聚焦到光记录介质的物镜，以及布置在光源和 物镜，以将从光记录介质反射的光与从光源发射的光分离。 光分离装置包括第一玻璃，形成在第一玻璃上的多层膜和布置在多层膜上的粘合层，以将第二玻璃粘合到多层膜上。 从光源发射的大部分光通过第一玻璃进入分光装置，并被多层膜反射。

公开(公告)号：USRE41455E1

公开(公告)日：2010-07-27

申请号：US11076588

申请日：2005-03-10

申请人： Yoshiaki Komma ,  Sadao Mizuno ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Sadao Mizuno ,  Seiji Nishino

IPC分类号： G02B5/32 ,  G02B7/00 ,  G02B3/10 ,  G02B3/08

CPC分类号： G02B5/1895 ,  G02B3/10 ,  G02B5/18 ,  G02B5/1814 ,  G02B5/1842 ,  G02B5/1871 ,  G02B5/1876 ,  G02B5/32 ,  G02B21/025 ,  G02B21/18 ,  G02B21/20 ,  G02B27/4238 ,  G03F9/70 ,  G03F9/7049 ,  G03F9/7069 ,  G03F9/7088 ,  G11B7/08511 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/139 ,  G11B19/12 ,  G11B19/127 ,  G11B2007/0006 ,  G11B2007/13727

摘要： A compound objective lens is composed of a hologram lens or transmitting a part of incident light without any diffraction to form a beam of transmitted light and diffracting a remaining part of the incident light to form a beam of first-order diffracted light, and an objective lens for converging the transmitted light to form a first converging spot on a front surface of a thin type of first information medium and converging the diffracted light to form a second converging spot on a front surface of a thick type of second information medium. Because the hologram selectively functions as a concave lens for the diffracted light, a curvature of the transmitted light differs from that of the diffracted light. Therefore, even though the first and second information mediums have different thicknesses, the transmitted light incident on rear surface of the first information medium is converged on the its front surface, and the diffracted light incident on a rear surface of the second information medium is converged on the its front surface. That is, the compound objective lens has two focal points.

摘要翻译： 复合物镜由全息透镜构成或透射入射光的一部分而没有任何衍射形成透射光束，衍射入射光的剩余部分以形成一级衍射光束，目标 透镜，用于会聚透射光以在薄型第一信息介质的前表面上形成第一会聚点，并且会聚衍射光以在厚型第二信息介质的前表面上形成第二会聚点。 由于全息图有选择地用作衍射光的凹透镜，透射光的曲率与衍射光的曲率不同。 因此，即使第一信息介质和第二信息介质具有不同的厚度，入射在第一信息介质的后表面上的透射光会聚在其前表面上，并且入射在第二信息介质的后表面上的衍射光会聚 在其前面。 也就是说，复合物镜具有两个焦点。

公开(公告)号：US07480227B2

公开(公告)日：2009-01-20

申请号：US11443750

申请日：2006-05-31

申请人： Seiji Nishino ,  Hidenori Wada ,  Yoshiaki Komma ,  Sadao Mizuno ,  Keiichi Matsuzaki

发明人： Seiji Nishino ,  Hidenori Wada ,  Yoshiaki Komma ,  Sadao Mizuno ,  Keiichi Matsuzaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1398 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1372 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/13925

摘要： An optical head device includes a focusing optical system for focusing a laser beam emitted from a semiconductor laser light source on an optical information medium with an objective lens. A chromatic aberration correction element for correcting chromatic aberration occurring in the objective lens is provided between the semiconductor laser light source and the optical information medium. A light distribution correction element in which the transmittance increases with the distance from the center of the aperture surface of the objective lens is provided so as to correct a reduction of the intensity of the light incident on the aperture surface of the objective lens with the distance from the center of the aperture surface.

摘要翻译： 光头装置包括聚焦光学系统，用于将从半导体激光光源发射的激光束聚焦在具有物镜的光信息介质上。 在半导体激光光源和光信息介质之间设置用于校正物镜中出现的色像差的色像差校正元件。 提供透光率随着距离物镜的孔径表面的中心的距离而增加的光分布校正元件，以便校正入射到物镜的孔表面上的光的强度的降低，距离 从孔表面的中心。

公开(公告)号：US07110342B2

公开(公告)日：2006-09-19

申请号：US10264297

申请日：2002-10-02

申请人： Seiji Nishino ,  Hidenori Wada ,  Yoshiaki Komma ,  Sadao Mizuno ,  Keiichi Matsuzaki

发明人： Seiji Nishino ,  Hidenori Wada ,  Yoshiaki Komma ,  Sadao Mizuno ,  Keiichi Matsuzaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1398 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1372 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/13925

摘要： An optical head device includes a focusing optical system for focusing a laser beam emitted from a semiconductor laser light source on an optical information medium with an objective lens. A chromatic aberration correction element for correcting chromatic aberration occurring in the objective lens is provided between the semiconductor laser light source and the optical information medium. A light distribution correction element in which the transmittance increases with the distance from the center of the aperture surface of the objective lens is provided so as to correct a reduction of the intensity of the light incident on the aperture surface of the objective lens with the distance from the center of the aperture surface.

公开(公告)号：US06400671B2

公开(公告)日：2002-06-04

申请号：US09897811

申请日：2001-07-02

申请人： Hideki Hayashi ,  Tatsuo Ito ,  Yoshiaki Komma ,  Hiroaki Yamamoto ,  Seiji Nishino

发明人： Hideki Hayashi ,  Tatsuo Ito ,  Yoshiaki Komma ,  Hiroaki Yamamoto ,  Seiji Nishino

IPC分类号： G11B700

CPC分类号： G11B7/131 ,  G11B7/0912 ,  G11B7/0943 ,  G11B7/133 ,  G11B7/1353 ,  G11B2007/0006

摘要： In a photodetector, the minimum size of the photodetection area for detecting a focus error signal from a light beam on the inner radius side of a hologram is made smaller than the minimum diameter of diffracted light beam spots (30, 31) for recording and reproduction, and when a CD is reproduced, a light beam close to the optical axis is made to significantly contribute to the focus error signal and the minimum size of the photodetection area for detecting the focus error signal from a light beam from the peripheral side of the hologram is made larger than the minimum diameter of diffracted light beam spots (130, 131) for recording and reproduction, whereby the focus error signal is made equal to the normal focus error signal when a DVD is reproduced, so that the focus offset variation caused when the base material thickness varies can be reduced.

摘要翻译： 在光电检测器中，将用于检测来自全息图的内半径侧上的光束的聚焦误差信号的光检测区域的最小尺寸设定为小于用于记录和再现的衍射光束点（30,31）的最小直径 ，并且当再现CD时，使靠近光轴的光束显着有助于聚焦误差信号和用于从来自所述光轴的外围侧的光束检测聚焦误差信号的光检测区域的最小尺寸 使全息图大于用于记录和再现的衍射光束点（130,131）的最小直径，由此当再现DVD时使聚焦误差信号等于正常聚焦误差信号，使得聚焦偏移变化引起 当基材厚度变化时可以减少。

公开(公告)号：US20050190665A1

公开(公告)日：2005-09-01

申请号：US10512897

申请日：2003-05-22

申请人： Eishin Mori ,  Jouji Anzai ,  Hideki Hayashi ,  Yoshiaki Komma

发明人： Eishin Mori ,  Jouji Anzai ,  Hideki Hayashi ,  Yoshiaki Komma

IPC分类号： G11B7/08 ,  G11B7/00 ,  G11B7/1376

CPC分类号： G11B7/123

摘要： A lens support mechanism including a semiconductor laser 10 for emitting a laser beam, an optical head enclosure 3 to which the semiconductor Laser 10 is fixed and located, a collimator lens 21 disposed coaxially with the laser beam emitted from the semiconductor laser 10, a resin cylinder 22 formed in a cylindrical shape so as to fix and locate the collimator lens 21 to the inner surface thereof and a cylindrical member 23 fitted to the resin cylinder 22 on a side of the collimator lens 21 opposite to the semiconductor laser 10 and formed so as to be fixed to the optical head enclosure 3. The cylindrical member 23 has almost the same linear expansion coefficient as that of the optical head enclosure 3.

摘要翻译： 包括用于发射激光束的半导体激光器10，固定和定位半导体激光器10的光头外壳3的透镜支撑机构，与半导体激光器10发射的激光束同轴设置的准直透镜21，树脂 气缸22，其形成为圆筒形状，以将准直透镜21固定并定位到其内表面;以及圆柱形构件23，该圆柱形构件23装配到与半导体激光器10相对的准直透镜21的侧面上的树脂圆柱体22，并形成为 以固定在光头罩3上。 圆柱形构件23具有与光学头罩3相似的线性膨胀系数。