公开(公告)号：US07733759B2

公开(公告)日：2010-06-08

申请号：US11588503

申请日：2006-10-26

申请人： Kenichi Shimada ,  Katsuhiko Izumi

发明人： Kenichi Shimada ,  Katsuhiko Izumi

IPC分类号： G11B7/135

CPC分类号： G11B7/1392 ,  G11B7/1275 ,  G11B7/1378 ,  G11B2007/0006

摘要： An optical system is disclosed including an optical pickup having a wavefront aberration-correcting element capable of correcting coma aberration and astigmatism, and an optical disc apparatus which uses the optical pickup. The optical pickup includes a laser light source for irradiating an optical disc with a light beam; an objective lens for focusing the light beam on the optical disc; a lens for correcting astigmatism; a second lens for correcting coma aberration; and a photodetector for receiving the light beam reflected from the optical disc. The astigmatism and the coma aberration are corrected independently of each other.

摘要翻译： 公开了一种光学系统，其包括具有能够校正彗差和像散的波前像差校正元件的光学拾取器，以及使用该光学拾取器的光盘装置。 光学拾取器包括用于用光束照射光盘的激光光源; 用于将光束聚焦在光盘上的物镜; 矫正散光镜片; 用于校正彗形像差的第二透镜; 以及用于接收从光盘反射的光束的光电检测器。 彼此独立地校正散光和彗形像差。

公开(公告)号：US20070286053A1

公开(公告)日：2007-12-13

申请号：US11700713

申请日：2007-01-30

申请人： Katsuhiko Izumi

发明人： Katsuhiko Izumi

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/1353 ,  G11B7/1395 ,  G11B2007/0013

摘要： When a dual-layer disc was read, light returning from an irrelevant layer interfered with signal light, causing a focusing error signal and tracking error signal to vary. As a result, full-expected performance could not be obtained from an optical pickup.Disclosed is an optical pickup that includes a laser diode, which emits an optical beam; a diffraction device, which is placed at a position through which the optical beam passes, and separates the optical beam into at least three optical beams (zero-order light, plus first-order light, and minus first-order light); an objective lens, which condenses the optical beams passing through the diffraction device on an optical disc; and a detector, which receives light reflected from the optical disc. The diffraction device allows only a specific polarization direction component of an optical beam to pass without being diffracted, and diffracts a polarization direction component that is orthogonal to the former component.

摘要翻译： 当读取双层盘时，从不相关层返回的光线会干扰信号光，导致聚焦误差信号和跟踪误差信号变化。 因此，不能从光学拾取器获得预期的性能。 公开了一种光拾取器，其包括发射光束的激光二极管; 衍射装置，其被放置在光束通过的位置，并将光束分成至少三个光束（零级光，加上一级光和负一级光）; 物镜，其将通过衍射装置的光束会聚在光盘上; 以及接收从光盘反射的光的检测器。 衍射装置仅允许光束的特定偏振方向分量通过而不被衍射，并衍射与前一分量正交的偏振方向分量。

公开(公告)号：US20070097811A1

公开(公告)日：2007-05-03

申请号：US11588503

申请日：2006-10-26

申请人： Kenichi Shimada ,  Katsuhiko Izumi

发明人： Kenichi Shimada ,  Katsuhiko Izumi

IPC分类号： G11B7/00

CPC分类号： G11B7/1392 ,  G11B7/1275 ,  G11B7/1378 ,  G11B2007/0006

摘要： An optical system is disclosed including an optical pickup having a wavefront aberration-correcting element capable of correcting coma aberration and astigmatism, and an optical disc apparatus which uses the optical pickup. The optical pickup includes a laser light source for irradiating an optical disc with a light beam; an objective lens for focusing the light beam on the optical disc; a lens for correcting astigmatism; a second lens for correcting coma aberration; and a photodetector for receiving the light beam reflected from the optical disc. The astigmatism and the coma aberration are corrected independently of each other.

摘要翻译： 公开了一种光学系统，其包括具有能够校正彗差和像散的波前像差校正元件的光学拾取器，以及使用该光学拾取器的光盘装置。 光学拾取器包括用于用光束照射光盘的激光光源; 用于将光束聚焦在光盘上的物镜; 矫正散光镜片; 用于校正彗形像差的第二透镜; 以及用于接收从光盘反射的光束的光电检测器。 彼此独立地校正散光和彗形像差。

公开(公告)号：US20070025207A1

公开(公告)日：2007-02-01

申请号：US11492949

申请日：2006-07-26

申请人： Katsuhiko Izumi ,  Shinya Fujimori

发明人： Katsuhiko Izumi ,  Shinya Fujimori

IPC分类号： G11B7/00

CPC分类号： G11B7/1365 ,  G11B7/1275 ,  G11B2007/0006

摘要： A first laser light source for emitting an optical beam of a first wavelength, a second laser light source for emitting an optical beam of a second wavelength different from the first wavelength and first and second polarizing devices through which the optical beams of first and second wavelengths transmit are provided. The first polarizing device changes the phase of the optical beam of first wavelength by about (M+½) times the first wavelength (M being integer) and the second polarizing device changes the phase of the optical beam of second wavelength by about (N+½) times the second wavelength (N being integer).

摘要翻译： 用于发射第一波长的光束的第一激光光源，用于发射不同于第一波长的第二波长的光束的第二激光光源以及第一和第二波长的光束的第一和第二偏振装置 提供传输。 第一偏振装置将第一波长的光束的相位改变第一波长的（M + 1/2）倍（M为整数），第二偏振装置将第二波长的光束的相位改变约（N + 1/2）倍的第二波长（N为整数）。

公开(公告)号：US06567352B1

公开(公告)日：2003-05-20

申请号：US09634548

申请日：2000-08-08

申请人： Shinro Inui ,  Naohiko Otoshi ,  Katsuhiko Izumi ,  Michio Miura ,  Naomitsu Kuroda ,  Ryuichiro Mizuno

发明人： Shinro Inui ,  Naohiko Otoshi ,  Katsuhiko Izumi ,  Michio Miura ,  Naomitsu Kuroda ,  Ryuichiro Mizuno

IPC分类号： G11B700

CPC分类号： G11B7/1374 ,  G11B7/093 ,  G11B7/0933 ,  G11B7/0935 ,  G11B2007/0006

摘要： It is an object to perform a thin and compact design of the objective lens driving device. In order to achieve the above object, optical beam is passed through a space surrounded by a tracking coil and a focusing coil which are adjacent to each other and fixed in a holder. Further, it is another object to position the objective lens with high precision in an objective lens driving device for switching a plurality of objective lenses in accordance with the type of an optical disc. In order to achieve this object, magnetic substances which are radially extended with the sliding shaft at the center are provided in the lens holder, and the magnetic substances are located within a plane perpendicular to the plane constituting the magnetic gap and at the outside of the magnetic gap. Still further, in an objective lens driving device it is another object to prevent the occurrence of positional displacement of the objective lens due to resistance force of current supply means such as FPC. To achieve this object, a first objective lens and a second objective lens are arranged so that the objective lens arrangement angle at which the first and second objective lenses are arranged with respect to the shaft center of the sliding shaft is displaced, by a predetermined amount, from the magnetic circuit arrangement angle at which the magnetic substances and the magnets are arranged with respect to the shaft center of the sliding shaft.

摘要翻译： 本发明的目的是实现物镜驱动装置的薄型紧凑设计。 为了实现上述目的，光束通过彼此相邻并固定在保持器中的由跟踪线圈和聚焦线圈包围的空间。 此外，另一目的是将物镜高精度地定位在用于根据光盘的类型切换多个物镜的物镜驱动装置中。 为了实现这个目的，在透镜保持器中设置有以中心的滑动轴径向延伸的磁性物质，并且磁性物质位于垂直于构成磁隙的平面的平面内，并且在 磁隙。 此外，在物镜驱动装置中，另一个目的是防止由于诸如FPC的电流供给装置的阻力而导致的物镜的位置偏移。 为了实现该目的，第一物镜和第二物镜被布置成使得第一和第二物镜相对于滑动轴的轴中心布置的物镜布置角度被移动预定量 从磁性物质和磁体相对于滑动轴的轴心配置的磁路配置角度。

公开(公告)号：US06680883B2

公开(公告)日：2004-01-20

申请号：US10387386

申请日：2003-03-14

申请人： Shinro Inui ,  Naohiko Otoshi ,  Katsuhiko Izumi ,  Michio Miura ,  Naomitsu Kuroda ,  Ryuichiro Mizuno

发明人： Shinro Inui ,  Naohiko Otoshi ,  Katsuhiko Izumi ,  Michio Miura ,  Naomitsu Kuroda ,  Ryuichiro Mizuno

IPC分类号： G11B700

CPC分类号： G11B7/1374 ,  G11B7/093 ,  G11B7/0933 ,  G11B7/0935 ,  G11B2007/0006

摘要： It is an object to perform a thin and compact design of the objective lens driving device. In order to achieve the above object, optical beam is passed through a space surrounded by a tracking coil and a focusing coil which are adjacent to each other and fixed in a holder. Further, it is another object to position the objective lens with high precision in an objective lens driving device for switching a plurality of objective lenses in accordance with the type of an optical disc. In order to achieve this object, magnetic substances which are radially extended with the sliding shaft at the center are provided in the lens holder, and the magnetic substances are located within a plane perpendicular to the plane constituting the magnetic gap and at the outside of the magnetic gap. Still further, in an objective lens driving device it is another object to prevent the occurrence of positional displacement of the objective lens due to resistance force of current supply means such as FPC. To achieve this object, a first objective lens and a second objective lens are arranged so that the objective lens arrangement angle at which the first and second objective lenses are arranged with respect to the shaft center of the sliding shaft is displaced, by a predetermined amount, from the magnetic circuit arrangement angle at which the magnetic substances and the magnets are arranged with respect to the shaft center of the sliding shaft.

摘要翻译： 本发明的目的是实现物镜驱动装置的薄型紧凑设计。 为了实现上述目的，光束通过彼此相邻并固定在保持器中的由跟踪线圈和聚焦线圈包围的空间。 此外，另一目的是将物镜高精度地定位在用于根据光盘的类型切换多个物镜的物镜驱动装置中。 为了实现这个目的，在透镜保持器中设置有以中心的滑动轴径向延伸的磁性物质，并且磁性物质位于垂直于构成磁隙的平面的平面内，并且在 磁隙。 此外，在物镜驱动装置中，另一个目的是防止由于诸如FPC的电流供给装置的阻力而导致的物镜的位置偏移。 为了实现该目的，第一物镜和第二物镜被布置成使得第一和第二物镜相对于滑动轴的轴中心布置的物镜布置角度被移动预定量 从磁性物质和磁体相对于滑动轴的轴心配置的磁路配置角度。

公开(公告)号：US5448427A

公开(公告)日：1995-09-05

申请号：US561574

申请日：1990-08-02

申请人： Kenmei Masuda ,  Kenji Ogiro ,  Hidefumi Goto ,  Sadao Hirose ,  Satoshi Fujino ,  Shinya Fujimori ,  Katsuhiko Izumi

发明人： Kenmei Masuda ,  Kenji Ogiro ,  Hidefumi Goto ,  Sadao Hirose ,  Satoshi Fujino ,  Shinya Fujimori ,  Katsuhiko Izumi

IPC分类号： G11B15/087 ,  G11B15/20 ,  G11B15/18 ,  G11B15/48

CPC分类号： G11B15/087 ,  G11B15/20

摘要： A tape run control unit in a magnetic recording and reproducing apparatus is provided with a discriminator and on a controller. The discriminator detects a stand-by time until a signal to be recorded is received in repositioning of the tape and generates a discrimination signal for discriminating the length of the stand-by time. The controller controls tape driving unit such as a capstan motor during the reposition and controls the stop position of the tape such that a magnetic head scans the portion of the tape where no data is recorded. After completion of repositioning, furthermore, the controller is responsive to a discrimination signal so as to select the stop mode which involves the release of pinch roller when the stand-by time is long and to select the mode for simply stopping only the capstan when the stand-by time is short.

摘要翻译： 在磁记录和再现装置中的磁带运行控制单元设置有鉴别器和控制器。 鉴别器检测待机时间，直到在磁带重新定位时接收待记录的信号，并产生用于区分待机时间的长度的鉴别信号。 控制器在重新定位期间控制诸如主导轴马达的磁带驱动单元，并且控制磁带的停止位置，使得磁头扫描不记录数据的磁带部分。 此外，在完成重新定位之后，控制器响应于判别信号，以便当待机时间长时选择包括压紧辊的释放的停止模式，并且选择仅当主动轮停止时的简单停止的模式 待机时间短。

公开(公告)号：US08094541B2

公开(公告)日：2012-01-10

申请号：US12036335

申请日：2008-02-25

申请人： Katsuhiko Izumi

发明人： Katsuhiko Izumi

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/1369 ,  G11B2007/0006

摘要： An optical pickup free from tracking error signal variation when playing back a double-layered disc, and coping with incompatible optical discs, such as BDs and HD DVDs, includes a laser light source, a first polarization rotation element for rotating a polarization direction of an optical beam from the source, an optical branching element disposed in a position after the polarization rotation element to reflect or transmit an optical beam according to polarization of the beam, first and second object lenses for focusing the reflected and transmitted optical beams onto first and second optical discs, respectively, a photodetector for sensing reflected light from the first and second optical discs, and a second polarization rotation element disposed after reflection or transmission of the reflected light from the first and second optical discs conducted by the branching element, to rotate a polarization direction of the reflected light.

摘要翻译： 当回放双层盘时，不具有跟踪误差信号变化的光拾取器，以及应对诸如BD和HD DVD之类的不兼容光盘的光拾取器包括激光光源，用于使第一偏振方向旋转的第一偏振旋转元件 来自光源的光束，设置在偏振旋转元件之后的位置的光分路元件，以根据光束的偏振反射或透射光束，第一和第二物镜，用于将反射和透射的光束聚焦到第一和第二 光盘分别用于感测来自第一和第二光盘的反射光的光检测器，以及设置在由分支元件传导的来自第一和第二光盘的反射光反射或透射之后的第二偏振旋转元件， 反射光的偏振方向。

公开(公告)号：US08004956B2

公开(公告)日：2011-08-23

申请号：US12053797

申请日：2008-03-24

申请人： Fumio Isshiki ,  Katsuhiko Izumi

发明人： Fumio Isshiki ,  Katsuhiko Izumi

IPC分类号： G11B7/135

CPC分类号： G11B7/1275 ,  G11B7/1356 ,  G11B7/22 ,  G11B2007/0006 ,  G11B2007/0013

摘要： Provided are an optical pick up and an optical component used for the optical pickup which are capable of preventing or restraining occurrence of deviation and unbalance which are caused by assembly errors during manufacturing of optical components, a temperature variation or the like. The optical pickup comprises a laser, a polarization changeover element for changing over a direction of polarization of an optical beam emitted from the laser, a beam splitting element for splitting the laser beam into a plurality of optical paths in accordance with a direction of a polarization, a plurality of objective lenses for focusing laser beams onto a recording layer of the optical disc, a rise-up mirror, and a plurality of coupling lenses arranged respectively intermediate of the plurality of optical paths led to the plurality of objective lenses. The rise-up mirror is arranged intermediate of the plurality of optical paths led to the plurality of objective lenses and adapted to be used common to respective optical beams on the plurality of optical paths. The plurality of the coupling lenses are coupled to and held on one and the same drive portion.

摘要翻译： 提供了一种用于光学拾取器的光拾取器和光学部件，其能够防止或限制由光学部件制造期间的组装误差，温度变化等引起的偏差和不平衡的发生。 光拾取器包括激光器，用于切换从激光器发射的光束的偏振方向的偏振转换元件，用于根据偏振方向将激光束分成多个光路的分束元件 用于将激光束聚焦到光盘的记录层上的多个物镜，上升反射镜和分别设置在被引导到多个物镜的多个光路之间的多个耦合透镜。 上升反射镜被布置在被引导到多个物镜的多个光路中间，并且适用于多个光路上的相应光束共同使用。 多个耦合透镜联接并保持在同一个驱动部分上。

公开(公告)号：US06195314B1

公开(公告)日：2001-02-27

申请号：US08968753

申请日：1997-08-19

申请人： Shinro Inui ,  Naohiko Otoshi ,  Katsuhiko Izumi ,  Michio Miura ,  Naomitsu Kuroda ,  Ryuichiro Mizuno

发明人： Shinro Inui ,  Naohiko Otoshi ,  Katsuhiko Izumi ,  Michio Miura ,  Naomitsu Kuroda ,  Ryuichiro Mizuno

IPC分类号： G11B700

CPC分类号： G11B7/1374 ,  G11B7/093 ,  G11B7/0933 ,  G11B7/0935 ,  G11B2007/0006

摘要： It is an object to perform a thin and compact design of the objective lens driving device. In order to achieve the above object, optical beam is passed through a space surrounded by a tracking coil and a focusing coil which are adjacent to each other and fixed in a holder. Further, it is another object to position the objective lens with high precision in an objective lens driving device for switching a plurality of objective lenses in accordance with the type of an optical disc. In order to achieve this object, magnetic substances which are radially extended with the sliding shaft at the center are provided in the lens holder, and the magnetic substances are located within a plane perpendicular to the plane constituting the magnetic gap and at the outside of the magnetic gap. Still further, in an objective lens driving device it is another object to prevent the occurrence of positional displacement of the objective lens due to resistance force of current supply means such as FPC. To achieve this object, a first objective lens and a second objective lens are arranged so that the objective lens arrangement angle at which the first and second objective lenses are arranged with respect to the shaft center of the sliding shaft is displaced, by a predetermined amount, from the magnetic circuit arrangement angle at which the magnetic substances and the magnets are arranged with respect to the shaft center of the sliding shaft.

摘要翻译： 本发明的目的是实现物镜驱动装置的薄型紧凑设计。 为了实现上述目的，光束通过彼此相邻并固定在保持器中的由跟踪线圈和聚焦线圈包围的空间。 此外，另一目的是将物镜高精度地定位在用于根据光盘的类型切换多个物镜的物镜驱动装置中。 为了实现这个目的，在透镜保持器中设置有以中心的滑动轴径向延伸的磁性物质，并且磁性物质位于垂直于构成磁隙的平面的平面内，并且在 磁隙。 此外，在物镜驱动装置中，另一个目的是防止由于诸如FPC的电流供给装置的阻力而导致的物镜的位置偏移。 为了实现该目的，第一物镜和第二物镜被布置成使得第一和第二物镜相对于滑动轴的轴中心布置的物镜布置角度被移动预定量 从磁性物质和磁体相对于滑动轴的轴心配置的磁路配置角度。