公开(公告)号：US20140247493A1

公开(公告)日：2014-09-04

申请号：US14273545

申请日：2014-05-09

Applicant: Panasonic Corporation

Inventor： Katsuhiko HAYASHI ,  Yasuhiro TANAKA ,  Michihiro YAMAGATA ,  Yoshiaki KOMMA ,  Kazuhiko ISHIMARU

IPC: G02B3/08 ,  G02B5/18

CPC classification number: G02B3/08 ,  G02B5/1876 ,  G02B2005/1804 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An objective lens element which has excellent compatibility with optical discs having different base material thicknesses is provided. An objective lens element 141 has optically functional surfaces on an incident side and an exit side. Either one of the optically functional surfaces is divided into an inner part 131B including a rotational symmetry axis and an outer part 131F which is a ring-shaped region surrounding the inner part 131B. On the inner part 131B, a plurality of discontinuous steps are provided. The plurality of steps change in height in the same direction from the optical axis toward the outer part, and each of the steps causes a constant optical path difference longer than the wavelength λ1 to the first incident light beam 61 and causes a constant optical path difference shorter than the wavelength λ2 to the second incident light beam 62.

Abstract translation: 提供了具有与具有不同基材厚度的光盘的良好兼容性的物镜元件。 物镜141具有在入射侧和出射侧的光学功能表面。 光学功能表面中的任一个被分成包括旋转对称轴的内部部分131B和围绕内部部分131B的环形区域的外部部分131F。 在内部部分131B上设有多个不连续的步骤。 多个步骤在与光轴朝向外部的相同方向上的高度变化，并且每个步骤对于第一入射光束61产生比波长λ1长的恒定光程差，并且导致恒定的光程差 比第二入射光束62的波长λ2短。

公开(公告)号：US08760989B2

公开(公告)日：2014-06-24

申请号：US13414724

申请日：2012-03-08

Applicant: Katsuhiko Hayashi ,  Yasuhiro Tanaka ,  Michihiro Yamagata ,  Yoshiaki Komma ,  Kazuhiko Ishimaru

Inventor： Katsuhiko Hayashi ,  Yasuhiro Tanaka ,  Michihiro Yamagata ,  Yoshiaki Komma ,  Kazuhiko Ishimaru

IPC: G11B7/00

CPC classification number: G02B3/08 ,  G02B5/1876 ,  G02B2005/1804 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An objective lens element which has excellent compatibility with optical discs having different base material thicknesses is provided. An objective lens element 141 has optically functional surfaces on an incident side and an exit side. Either one of the optically functional surfaces is divided into an inner part 131B including a rotational symmetry axis and an outer part 131F which is a ring-shaped region surrounding the inner part 131B. On the inner part 131B, a plurality of discontinuous steps are provided. The plurality of steps change in height in the same direction from the optical axis toward the outer part, and each of the steps causes a constant optical path difference longer than the wavelength λ1 to the first incident light beam 61 and causes a constant optical path difference shorter than the wavelength λ2 to the second incident light beam 62.

Abstract translation: 提供了具有与具有不同基材厚度的光盘的良好兼容性的物镜元件。 物镜141具有在入射侧和出射侧的光学功能表面。 光学功能表面中的任一个被分成包括旋转对称轴的内部部分131B和围绕内部部分131B的环形区域的外部部分131F。 在内部部分131B上设有多个不连续的步骤。 多个步骤在与光轴朝向外部的相同方向上的高度变化，并且每个步骤对于第一入射光束61产生比波长λ1长的恒定光程差，并且导致恒定的光程差 比第二入射光束62的波长λ2短。

公开(公告)号：US08406110B2

公开(公告)日：2013-03-26

申请号：US13410313

申请日：2012-03-02

Applicant: Katsuhiko Hayashi ,  Yasuhiro Tanaka ,  Michihiro Yamagata ,  Yoshiaki Komma

Inventor： Katsuhiko Hayashi ,  Yasuhiro Tanaka ,  Michihiro Yamagata ,  Yoshiaki Komma

IPC: G11B7/135

CPC classification number: G02B5/1876 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An objective lens element having excellent compatibility with optical discs having different base material thicknesses is provided. The objective lens element has optically functional surfaces on an incident side and an exit side. At least either one of the optically functional surfaces on the incident side and the exit side includes a diffraction portion which satisfies at least either one of the following formulas (1) and (2): θ1×θ2

Abstract translation: 提供了具有与具有不同基材厚度的光盘的良好兼容性的物镜元件。 物镜元件在入射侧和出射侧具有光学功能表面。 入射侧和出射侧的光学功能面中的至少任一方包括满足下述式（1）和（2）中的至少任一个的衍射部：＆lt; 1×＆Thetas; 2 <0（× 表示乘法）（1），（sin＆hetas; 2）/λ22= - （sin＆hetas; 1）/λ1（2），其中，θ是具有提供最大衍射效率的衍射级的光束的衍射角 在波长λ1处，并且λ是具有在波长λ2处提供最大衍射效率的衍射级的光束的衍射角。

公开(公告)号：US08391121B2

公开(公告)日：2013-03-05

申请号：US12585395

申请日：2009-09-14

Applicant: Noriyuki Kawano ,  Jiro Yoshinari ,  Motohiro Inoue ,  Atsuko Kosuda ,  Naoki Hayashida

Inventor： Noriyuki Kawano ,  Jiro Yoshinari ,  Motohiro Inoue ,  Atsuko Kosuda ,  Naoki Hayashida

IPC: G11B7/00

CPC classification number: G11B7/08511 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/139 ,  G11B2007/0013

Abstract: A recording and reading system for a multi-layered optical recording medium includes: a multi-layered optical recording medium including a plurality of recording layers and a single servo layer; and an optical head. The optical head includes a recording and reading objective lens of a signal recording and reading optical system and a servo objective lens of a servo signal detection optical system that are disposed on a common actuator. The recording and reading objective lens is mounted on the common actuator through a minute-drive apparatus so as to be minutely driven in a focusing direction relative to the servo objective lens. When the servo objective lens is focused on the servo layer, a reading light beam is quickly focused on a target one of the plurality of recording layers.

Abstract translation: 一种用于多层光学记录介质的记录和读取系统包括：包括多个记录层和单个伺服层的多层光学记录介质; 和光学头。 光头包括信号记录和读取光学系统的记录和读取物镜以及设置在公共致动器上的伺服信号检测光学系统的伺服物镜。 记录和读取物镜通过分钟驱动装置安装在公共致动器上，以便相对于伺服物镜在聚焦方向上被微小地驱动。 当伺服物镜聚焦在伺服层上时，读取光束被快速聚焦在多个记录层中的目标一个上。

公开(公告)号：US20120170122A1

公开(公告)日：2012-07-05

申请号：US13414724

申请日：2012-03-08

Applicant: Katsuhiko Hayashi ,  Yasuhiro Tanaka ,  Michihiro Yamagata ,  Yoshiaki Komma ,  Kazuhiko Ishimaru

Inventor： Katsuhiko Hayashi ,  Yasuhiro Tanaka ,  Michihiro Yamagata ,  Yoshiaki Komma ,  Kazuhiko Ishimaru

IPC: G02B5/18

CPC classification number: G02B3/08 ,  G02B5/1876 ,  G02B2005/1804 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An objective lens element which has excellent compatibility with optical discs having different base material thicknesses is provided. An objective lens element 141 has optically functional surfaces on an incident side and an exit side. Either one of the optically functional surfaces is divided into an inner part 131B including a rotational symmetry axis and an outer part 131F which is a ring-shaped region surrounding the inner part 131B. On the inner part 131B, a plurality of discontinuous steps are provided. The plurality of steps change in height in the same direction from the optical axis toward the outer part, and each of the steps causes a constant optical path difference longer than the wavelength λ1 to the first incident light beam 61 and causes a constant optical path difference shorter than the wavelength λ2 to the second incident light beam 62.

Abstract translation: 提供了具有与具有不同基材厚度的光盘的良好兼容性的物镜元件。 物镜141具有在入射侧和出射侧的光学功能表面。 光学功能表面中的任一个被分成包括旋转对称轴的内部部分131B和围绕内部部分131B的环形区域的外部部分131F。 在内部部分131B上设有多个不连续的步骤。 多个步骤在与光轴朝向外部的相同方向上的高度变化，并且每个步骤对于第一入射光束61产生比波长λ1长的恒定光程差，并且导致恒定的光程差 比第二入射光束62的波长λ2短。

公开(公告)号：US08154978B2

公开(公告)日：2012-04-10

申请号：US12040518

申请日：2008-02-29

Applicant: Tohru Hotta ,  Ryoichi Kawasaki ,  Kenji Kan ,  Hiroyuki Shindo

Inventor： Tohru Hotta ,  Ryoichi Kawasaki ,  Kenji Kan ,  Hiroyuki Shindo

IPC: G11B7/00 ,  G02B1/10

CPC classification number: G11B7/1374 ,  G11B7/139

Abstract: An optical pickup apparatus comprising: an objective lens configured to focus laser light having the Gaussian distribution properties emitted from a laser diode to a signal recording layer of an optical disc; and an adjustment coating formed on a surface of an incident face of the objective lens on which the laser light is to be made incident, the adjustment coating being configured to adjust transmittance of the laser light passing through the objective lens, the adjustment coating being formed on the surface of the incident face such that the transmittance is lowered as a numerical aperture of the objective lens is reduced.

Abstract translation: 一种光学拾取装置，包括：物镜，被配置为将具有从激光二极管发射的高斯分布特性的激光聚焦到光盘的信号记录层; 以及形成在要使激光入射的物镜的入射面的表面上的调整涂层，调整涂层被配置为调节通过物镜的激光的透射率，形成调整涂层 在入射面的表面上，由于物镜的数值孔径减小，透射率降低。

公开(公告)号：US20120069723A1

公开(公告)日：2012-03-22

申请号：US13265684

申请日：2009-04-24

Applicant: Makoto Sato ,  Masakazu Ogasawara ,  Kazuo Takahashi ,  Masaharu Nakano

Inventor： Makoto Sato ,  Masakazu Ogasawara ,  Kazuo Takahashi ,  Masaharu Nakano

IPC: G11B7/00

CPC classification number: G11B7/0938 ,  G11B7/0908 ,  G11B7/1356 ,  G11B7/1378 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0013

Abstract: An optical recording medium drive device including: a combining prism for combining a recording first laser beam emitted from a first light source with a recording second laser beam emitted from the first light source so as to coaxially guide them; an objective lens for condensing the first and second laser beams from the combining prism toward an optical recording medium; a first photodetecting means for detecting reflected light of the first laser beam from a recording layer; a second photodetecting means for detecting reflected light of the second laser beam from a guide layer; a magnification conversion element disposed on an optical path of the second laser beam between a second light source and the combining prism for diffusing or converging the second laser beam incident upon the objective lens; a first focus error generating means for generating a first focus error signal indicating an error between a condensed spot position of the first laser beam and the recording layer based on an output signal of the first photodetecting means; a second focus error generating means for generating a second focus error signal indicating an error between a condensed spot position of the second laser beam and the guide layer based on an output signal of the second photodetecting means; a first focus control means for controlling the objective lens in an optical axis direction thereof in accordance with the first focus error signal; and a second focus control means for controlling a magnitude of the diffusion or convergence of the second laser beam by the magnification conversion element in accordance with the second focus error signal.

Abstract translation: 一种光记录介质驱动装置，包括：组合棱镜，用于将从第一光源发射的记录第一激光束与从第一光源发射的记录第二激光束组合以同轴地引导它们; 用于将来自组合棱镜的第一和第二激光束聚光到光学记录介质的物镜; 用于从记录层检测第一激光束的反射光的第一光检测装置; 用于从引导层检测第二激光束的反射光的第二光电检测装置; 放大转换元件，设置在所述第二激光束的光路上，在第二光源与所述组合棱镜之间，用于使入射到所述物镜上的所述第二激光束扩散或会聚; 第一聚焦误差产生装置，用于基于第一光电检测装置的输出信号产生指示第一激光束的聚光点位置与记录层之间的误差的第一聚焦误差信号; 第二聚焦误差产生装置，用于基于第二光电检测装置的输出信号产生指示第二激光束的聚光点位置与引导层之间的误差的第二聚焦误差信号; 第一聚焦控制装置，用于根据第一聚焦误差信号在其光轴方向上控制物镜; 以及第二焦点控制装置，用于根据第二聚焦误差信号来控制放大转换元件的第二激光束的扩散或会聚的大小。

公开(公告)号：USRE43106E1

公开(公告)日：2012-01-17

申请号：US11849609

申请日：2007-09-04

Applicant: Jang-Hoon Yoo ,  Chul-Woo Lee

Inventor： Jang-Hoon Yoo ,  Chul-Woo Lee

IPC: G11B7/00

CPC classification number: G11B7/1353 ,  G02B5/32 ,  G11B7/1275 ,  G11B7/1372 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: An optical pickup apparatus compatible with at least two types of optical recording media, using light beams having respective different wavelengths for recording and reading information, the optical pickup apparatus including two laser light sources to emit light beams having the different wavelengths, a holographic lens including a holographic ring to transmit the light beams incident in an inner region of the holographic ring, and to diffract a specific light beam among the light beams emitted from the laser light sources incident in an outer region relative to the inner region, an objective lens to focus the light beams passed through the holographic ring lens on the respective information recording surfaces of the two types of the optical recording media, optical elements to alter optical paths of the light beams reflected from the information recording surfaces of the optical recording media to corresponding photodetectors.

Abstract translation: 一种与至少两种类型的光学记录介质兼容的光学拾取装置，使用具有各自不同波长的光束来记录和读取信息，所述光学拾取装置包括两个激光源，以发射具有不同波长的光束;全息透镜，包括 用于透射入射在全息环的内部区域中的光束的全息环，并且从入射在相对于内部区域的外部区域的激光光源发射的光束中衍射特定光束，将物镜衍射到 将通过全息环透镜的光束聚焦在两种类型的光学记录介质，光学元件的相应信息记录表面上，以将从光学记录介质的信息记录表面反射的光束的光路改变为相应的光电检测器 。

公开(公告)号：US20110122755A1

公开(公告)日：2011-05-26

申请号：US13056256

申请日：2009-07-21

Applicant: Kiyono Tateyama ,  Kentarou Nakamura

Inventor： Kiyono Tateyama ,  Kentarou Nakamura

IPC: G11B7/135 ,  G02B13/18 ,  G02B5/18

CPC classification number: G11B7/1275 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

Abstract: Provided are an objective lens with enhanced transmittance and an optical pickup apparatus which can record and/or reproduce information properly for three kinds of discs with different recording densities, even if a single lens is used as the objective lens. When all the expressions (1) to (3) are satisfied, excellent aberration characteristics can be obtained for the three kinds of discs: −0.02≦m1≦0.02 (1); 0≦(WD1−WD2)≦1.57 m2+0.123 or 1.57 m2+0.24≦(WD1−WD2)≦0.7 (2); and 0≦(WD1−WD3)≦1.79 m3+0.333 or 1.66 m3+0.508≦(WD1−WD3)≦0.7 (3).

Abstract translation: 提供了具有增强的透射率的物镜和可以适当地记录和/或再现具有不同记录密度的三种盘的信息的光学拾取装置，即使使用单个透镜作为物镜。 当满足所有表达式（1）至（3）时，可以获得三种光盘的优异的像差特性：-0.02＆nlE; m1＆nlE; 0.02（1）; 0＆nlE;（WD1-WD2）＆nlE; 1.57m2 + 0.123或1.57m2 + 0.24＆nlE;（WD1-WD2）＆nlE; 0.7（2）; 和0＆nlE;（WD1-WD3）＆nlE; 1.79m3 + 0.333或1.66m3 + 0.508＆nlE;（WD1-WD3）＆N1; 0.7（3）。

公开(公告)号：US20100315936A1

公开(公告)日：2010-12-16

申请号：US12860649

申请日：2010-08-20

Applicant: Shogo Horinouchi ,  Takashi Haruguchi ,  Taiichi Mori ,  Hideki Yoshinaka ,  Nobuyuki Tokubuchi ,  Shin Ishibashi ,  Hitoshi Asahi

Inventor： Shogo Horinouchi ,  Takashi Haruguchi ,  Taiichi Mori ,  Hideki Yoshinaka ,  Nobuyuki Tokubuchi ,  Shin Ishibashi ,  Hitoshi Asahi

IPC: G11B7/135

CPC classification number: G11B7/1362 ,  G11B7/0932 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/0956 ,  G11B7/121 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13925 ,  G11B7/22 ,  G11B2007/0006

Abstract: An optical pickup device includes light sources for respectively emitting a plurality of different wavelengths of light, a unit structured for causing at least a part of the light emitted from the light sources to pass a same optical path; and a focusing unit for focusing the light. The focusing unit includes at least first and second focusing parts, the first focusing part being to focus mainly a wavelength of light different from a wavelength of light to be mainly focused by the second focusing part. The optical pickup device and optical disk device are capable of realizing at least one of thickness reduction, size reduction and suppression against characteristic deterioration even where coping with various wavelengths of laser including a blue laser.