公开(公告)号：US07196989B2

公开(公告)日：2007-03-27

申请号：US11418254

申请日：2006-05-05

申请人： Noriaki Nishi ,  Kenji Yamamoto

发明人： Noriaki Nishi ,  Kenji Yamamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0079 ,  G11B7/1263 ,  G11B7/1356 ,  G11B7/1365 ,  G11B7/1369 ,  G11B7/1395 ,  G11B19/12 ,  G11B2007/0006 ,  G11B2007/0013 ,  G11B2007/13727

摘要： A method and an apparatus for driving an optical recording medium for recording and/or reproducing various information for the optical recording medium, in which the output power ratio of the light source may be reduced for recording and reproduction, for optical recording media of different sorts, or for respective recording surfaces of a multi-layered optical recording medium, so that optimum characteristics may be realized even with use of an easy-to-fabricate light source or a light source with a smaller light output rating. The intensity of a light beam emitted on an optical recording medium 102 by an optical head 104 is controlled by optical coupling efficiency varying elements 214, 215 depending on the sort of the optical recording medium 102, recording surfaces of a multi-layered optical recording medium, recording surfaces in the multi-layered optical recording medium or on the operating modes, in such a manner that the intensity of the light beam emitted on the optical recording medium 102 may be significantly varied without drastically increasing the output power ratio on the side light source 212.

摘要翻译： 一种用于记录和/或再现用于记录和/或再现光记录介质的各种信息的光学记录介质的方法和装置，其中光源的输出功率比可以减少用于记录和再现，用于不同种类的光学记录介质 或者对于多层光记录介质的各个记录表面，即使使用易于制造的光源或具有较小的光输出等级的光源，也可以实现最佳特性。 通过光学头104在光学记录介质102上发射的光束的强度由光学耦合效率变化元件214,215控制，这取决于光学记录介质102的种类，多层光学记录介质的记录表面 在多层光学记录介质中或在操作模式下记录表面，使得在光学记录介质102上发射的光束的强度可以显着变化，而不会显着增加侧光上的输出功率比 来源212。

公开(公告)号：US20060077784A1

公开(公告)日：2006-04-13

申请号：US11230675

申请日：2005-09-21

申请人： Midori Kanaya ,  Katsutoshi Sato ,  Kenji Yamamoto ,  Noriaki Nishi ,  Noriyuki Mori

发明人： Midori Kanaya ,  Katsutoshi Sato ,  Kenji Yamamoto ,  Noriaki Nishi ,  Noriyuki Mori

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/1395 ,  G11B2007/0006

摘要： An optical pickup includes a first optical system for collecting first laser light emitted from a first laser light source onto a first disk, and guiding reflected light from the first disk to a photoreceptor; a second optical system for collecting second laser light emitted from a second laser light source onto a second disk, and guiding reflected light from the second disk to a photoreceptor; a second objective lens for collecting the second laser light onto the second disk and receiving the reflected light from the second disk, the second objective lens being movable in a radial direction passing through the center of the second disk, and a first objective lens for collecting the first laser light onto the first disk and receiving the reflected light from the first disk, the first objective lens being disposed offset from the radial direction and adjacently to the second objective lens.

公开(公告)号：US20050270925A1

公开(公告)日：2005-12-08

申请号：US11113037

申请日：2005-04-25

申请人： Kenji Yamamoto ,  Katsutoshi Sato ,  Noriaki Nishi ,  Midori Kanaya ,  Shinya Makita

发明人： Kenji Yamamoto ,  Katsutoshi Sato ,  Noriaki Nishi ,  Midori Kanaya ,  Shinya Makita

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

CPC分类号： G11B7/1376 ,  G11B7/13927 ,  G11B2007/0006

摘要： An optical pickup including a light source unit having a first radiating unit for radiating a light beam of a first wavelength, a second radiating unit for radiating a light beam of a second wavelength and a third radiating unit for radiating a light beam of a third wavelength, a collimator lens having different focal lengths dependent on the first to third wavelengths, and an objective lens for condensing light beams, radiated from the first to third radiating units, on an information recording surface of an optical disc, and a recording and/or reproducing apparatus employing the optical pickup, are disclosed. The optical pickup and the recording and/or reproducing apparatus are used for recording and/or reproducing the information for plural sorts of the information recording medium of different formats. Certain components of the optical pickup are used in common for the different light beams to reduce the size of the device as well as to correct the spherical aberration.

摘要翻译： 一种光学拾取器，包括具有用于照射第一波长的光束的第一辐射单元和第二波长的光束的第二辐射单元的光源单元和用于照射第三波长的光束的第三辐射单元 ，具有取决于第一至第三波长的不同焦距的准直透镜，以及用于将从第一至第三辐射单元辐射的光束聚光在光盘的信息记录表面上的物镜，以及记录和/或 公开了采用光学拾取器的再现装置。 光拾取器和记录和/或再现装置用于记录和/或再现用于多种不同格式的信息记录介质的信息。 对于不同的光束，光拾取器的某些部件共同使用以减小装置的尺寸以及校正球面像差。

公开(公告)号：US20050265207A1

公开(公告)日：2005-12-01

申请号：US11118349

申请日：2005-05-02

申请人： Kenji Yamamoto ,  Katsutoshi Sato ,  Noriaki Nishi ,  Midori Kanaya

发明人： Kenji Yamamoto ,  Katsutoshi Sato ,  Noriaki Nishi ,  Midori Kanaya

IPC分类号： G11B7/135 ,  G02B26/08 ,  G02B27/28 ,  G11B7/00

CPC分类号： G11B7/139 ,  G02B27/283 ,  G11B7/1275 ,  G11B7/1378 ,  G11B7/1395 ,  G11B2007/0006

摘要： An optical pickup housing an optical system including a collimator lens for converting laser light incident on the collimator lens into an approximately parallel light beam, and an objective lens for receiving the laser light converted into the approximately parallel light beam and focusing the laser light onto a recording medium, the optical pickup having a light source configured to emit a plurality of laser beams of different wavelengths; a magnification conversion element arranged between the collimator lens and the objective lens; a bypass optical path configured to bypass the magnification conversion element; and optical path selection unit configured to select, according to a wavelength of each of the plurality of laser beams, whether each of the plurality of laser beams is to pass through an optical path passing through the magnification conversion element or through the bypass optical path.

摘要翻译： 一种光学拾取器，其容纳包括用于将入射在准直透镜上的激光转换成大致平行光束的准直透镜的光学系统，以及用于接收被转换成大致平行光束的激光并将激光聚焦到 记录介质，所述光学拾取器具有被配置为发射多个不同波长的激光束的光源; 放大转换元件，布置在准直透镜和物镜之间; 旁路光路，被配置为绕过所述放大率转换元件; 以及光路选择单元，被配置为根据所述多个激光束中的每一个的波长来选择所述多个激光束中的每一个是否穿过通过所述放大率转换元件的光路或通过所述旁路光路。

公开(公告)号：US08477580B2

公开(公告)日：2013-07-02

申请号：US13225764

申请日：2011-09-06

申请人： Kenji Yamamoto ,  Noriaki Nishi ,  Kimihiro Saito

发明人： Kenji Yamamoto ,  Noriaki Nishi ,  Kimihiro Saito

IPC分类号： G11B7/095 ,  G11B7/135

CPC分类号： G11B7/1374 ,  G11B7/0956 ,  G11B7/13927 ,  G11B2007/0009

摘要： Provided is an objective lens, which is provided in an optical pickup including a spherical aberration correction mechanism which performs a spherical aberration correction with respect to laser light applied to a recording layer of an optical recording medium, having the recording layer on which information can be recorded at a plurality of positions in a depth direction, via the objective lens, and a tilt correction unit which varies a lens tilt angle which is a tilt angle of the objective lens, thereby performing a tilt correction.

摘要翻译： 提供一种物镜，其设置在包括球面像差校正机构的光学拾取器中，所述球面像差校正机构对于施加到光学记录介质的记录层的激光进行球面像差校正，其具有信息可以在其上的记录层 通过物镜在深度方向上的多个位置记录，以及倾斜校正单元，其改变作为物镜的倾斜角度的透镜倾斜角度，从而进行倾斜校正。

公开(公告)号：US20120063287A1

公开(公告)日：2012-03-15

申请号：US13225764

申请日：2011-09-06

申请人： Kenji Yamamoto ,  Noriaki Nishi ,  Kimihiro Saito

发明人： Kenji Yamamoto ,  Noriaki Nishi ,  Kimihiro Saito

IPC分类号： G11B7/135 ,  G02B7/02

CPC分类号： G11B7/1374 ,  G11B7/0956 ,  G11B7/13927 ,  G11B2007/0009

摘要： Provided is an objective lens, which is provided in an optical pickup including a spherical aberration correction mechanism which performs a spherical aberration correction with respect to laser light applied to a recording layer of an optical recording medium, having the recording layer on which information can be recorded at a plurality of positions in a depth direction, via the objective lens, and a tilt correction unit which varies a lens tilt angle which is a tilt angle of the objective lens, thereby performing a tilt correction.

摘要翻译： 提供一种物镜，其设置在包括球面像差校正机构的光学拾取器中，所述球面像差校正机构对于施加到光学记录介质的记录层的激光进行球面像差校正，其具有信息可以在其上的记录层 通过物镜在深度方向上的多个位置记录，以及倾斜校正单元，其改变作为物镜的倾斜角度的透镜倾斜角度，从而进行倾斜校正。

公开(公告)号：US07675834B2

公开(公告)日：2010-03-09

申请号：US11113037

申请日：2005-04-25

申请人： Kenji Yamamoto ,  Katsutoshi Sato ,  Noriaki Nishi ,  Midori Kanaya ,  Shinya Makita

发明人： Kenji Yamamoto ,  Katsutoshi Sato ,  Noriaki Nishi ,  Midori Kanaya ,  Shinya Makita

IPC分类号： G11B7/135

CPC分类号： G11B7/1376 ,  G11B7/13927 ,  G11B2007/0006

摘要： An optical pickup including a light source unit having a first radiating unit for radiating a light beam of a first wavelength, a second radiating unit for radiating a light beam of a second wavelength and a third radiating unit for radiating a light beam of a third wavelenght, a collimator lens having different focal lengths dependent on the first to third wavelengths, and an objective lens for condensing light beams, radiated from the first to third radiating units, on an information recording surface of an optical disc, and a recording and/or reproducing apparatus employing the optical pickup, are disclosed. The optical pickup and the recording and/or reproducing apparatus are used for recording and/or reproducing the information for plural sorts of the information recording medium of different formats. Certain components of the optical pickup are used in common for the different light beams to reduce the size of the device as well as to correct the spherical aberration.

摘要翻译： 一种光拾取器，包括具有用于照射第一波长的光束的第一辐射单元的光源单元，用于辐射第二波长的光束的第二辐射单元和用于辐射第三波长的光束的第三辐射单元 ，具有取决于第一至第三波长的不同焦距的准直透镜，以及用于将从第一至第三辐射单元辐射的光束聚光在光盘的信息记录表面上的物镜，以及记录和/或 公开了采用光学拾取器的再现装置。 光拾取器和记录和/或再现装置用于记录和/或再现用于多种不同格式的信息记录介质的信息。 对于不同的光束，光拾取器的某些部件共同使用以减小装置的尺寸以及校正球面像差。

公开(公告)号：US20060007812A1

公开(公告)日：2006-01-12

申请号：US11168477

申请日：2005-06-29

申请人： Noriaki Nishi ,  Kenji Yamamoto ,  Takashi Kobayashi ,  Katsuhiro Shindo ,  Yuhei Kobayashi

发明人： Noriaki Nishi ,  Kenji Yamamoto ,  Takashi Kobayashi ,  Katsuhiro Shindo ,  Yuhei Kobayashi

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/13925 ,  G11B2007/0006

摘要： The present invention provides an optical pickup device which realizes an optical system having an optical magnification suitable for each disc format between three optical discs and a light emitting means for emitting a laser beam having a wavelength corresponding to each disc in the optical system of the optical pickup for recording and/or reproducing an information signal to the optical discs and which prevents the number of components from being increased to simplify the composition of the optical system, thereby preventing the length of an optical path from being lengthened, the optical pickup from being increased in size. The optical pickup device has a first light emitting unit for emitting a laser beam having a first wavelength and a laser beam having a second wavelength, a second light emitting unit for emitting a laser beam having a third wavelength, a first collimator lens for transmitting the laser beam having the first wavelength and the laser beam having the second wavelength, a second collimator lens for transmitting the laser beam having the third wavelength, a first objective lens for transmitting the laser beam having the first wavelength transmitted through the first collimating lens or the laser beam having the third wavelength transmitted through the second collimator lens, and a second objective lens for transmitting the laser beam having the second wavelength transmitted through the first collimator lens.

摘要翻译： 本发明提供了一种光学拾取装置，其实现了具有适合于三个光盘之间的每种光盘格式的光学倍率的光学系统和用于在光学系统中发射具有与每个光盘对应的波长的激光束的发光装置 拾取用于将信息信号记录和/或再现到光盘，并且防止增加部件的数量以简化光学系统的组成，从而防止光路的长度被延长，光学拾取器不被 尺寸增加。 光拾取装置具有用于发射具有第一波长的激光束和具有第二波长的激光束的第一发光单元，用于发射具有第三波长的激光束的第二发光单元，用于发射第三波长的第一准直透镜， 具有第一波长的激光束和具有第二波长的激光束，用于透射具有第三波长的激光束的第二准直透镜，用于透射通过第一准直透镜透射第一波长的激光束的第一物镜或 具有通过第二准直透镜透射的第三波长的激光束和用于透射通过第一准直透镜透射具有第二波长的激光束的第二物镜。

公开(公告)号：US20050270912A1

公开(公告)日：2005-12-08

申请号：US11119927

申请日：2005-05-03

申请人： Katsutoshi Sato ,  Hiroaki Yukawa ,  Kenji Yamamoto ,  Noriaki Nishi ,  Midori Kanaya

发明人： Katsutoshi Sato ,  Hiroaki Yukawa ,  Kenji Yamamoto ,  Noriaki Nishi ,  Midori Kanaya

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

CPC分类号： G11B7/1275 ,  G11B7/1359 ,  G11B7/1367 ,  G11B2007/0006

摘要： The present invention provides an optical pickup in which light beams of different wavelengths, radiated from plural light sources and reflected back from a recording surface, are condensed in the same area. The optical pickup records and/or reproduces each of a plurality of optical recording mediums having different protective substrate thicknesses, by light beams different in wavelength and in numerical aperture, and includes a light source including a first radiating part for radiating a first light beam having a first wavelength, a second radiating part for radiating a second light beam having a second wavelength, and a third radiating part for radiating a third light beam having a third wavelength, an objective lens for condensing said first to third light beams on each of the optical recording mediums having different protective substrate thicknesses, and a light receiving section for receiving light beams reflected by said optical recording mediums and converting the light beams into electrical signals, there being provided an optical axis combining section on an light path from a light source to said light receiving section for bringing the optical axes of reflected light beams of said first to third light beams into coincidence on a light receiving surface of said light receiving section.

摘要翻译： 本发明提供了一种光拾取器，其中从多个光源辐射并从记录表面反射的不同波长的光束在同一区域中被冷凝。 光学拾取器通过不同波长和数值孔径的光束记录和/或再现具有不同保护衬底厚度的多个光学记录介质中的每一个，并且包括光源，该光源包括用于辐射第一光束的第一辐射部分， 第一波长的第二辐射部分，用于辐射具有第二波长的第二光束的第二辐射部分和用于辐射具有第三波长的第三光束的第三辐射部分，用于将所述第一至第三光束聚光的物镜 具有不同保护基板厚度的光记录介质和用于接收由所述光记录介质反射并将光束转换成电信号的光束的光接收部分，在从光源到光源的光路上设置有光轴组合部分 所述光接收部分用于使反射光束的光轴旋转 所述第一至第三光束在所述光接收部分的光接收表面上重合。

公开(公告)号：US08953424B2

公开(公告)日：2015-02-10

申请号：US13485144

申请日：2012-05-31

申请人： Kimihiro Saito ,  Noriaki Nishi

发明人： Kimihiro Saito ,  Noriaki Nishi

IPC分类号： G11B7/00 ,  G11B7/09

CPC分类号： G11B7/0903

摘要： An optical-recording-medium driving apparatus includes: a light irradiating/receiving section configured to irradiate light on a medium so as to form a first side spot, a main spot, and a second side spot, and to receive reflection light from the individual spots; a first delay section configured to delay a light reception signal on the first side spot in accordance with a disposition interval between the first and the second side spots; a second delay section configured to delay a light reception signal on the main spot in accordance with a disposition interval between the main and second side spots; and a tracking-error-signal generation section configured to generate a tracking error signal on the basis of a correlation between delayed light reception signals on the first side spot and the main spot, and a correlation between the light reception signals on the second side spot and the main spot.

摘要翻译： 光记录介质驱动装置包括：光照射/接收部分，被配置为将光照射在介质上以形成第一侧光点，主光点和第二侧光斑，并且接收来自该个体的反射光 斑点 第一延迟部，被配置为根据第一和第二侧光斑之间的配置间隔延迟第一侧光点处的光接收信号; 第二延迟部，被配置为根据所述主侧和第二侧光斑之间的配置间隔延迟所述主光点上的光接收信号; 以及跟踪误差信号生成部，被配置为基于第一侧点的延迟光接收信号和主光点之间的相关性以及第二侧光点上的光接收信号之间的相关性来生成跟踪误差信号 和主要地点。