公开(公告)号：US08194521B2

公开(公告)日：2012-06-05

申请号：US12740721

申请日：2009-08-26

申请人： Hidenori Wada ,  Yoshiaki Komma ,  Takeshi Shimamoto

发明人： Hidenori Wada ,  Yoshiaki Komma ,  Takeshi Shimamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/08511 ,  G11B7/1369 ,  G11B2007/0013

摘要： An optical disc device is provided with an optical head including a light source, a condensing optical system including an objective lens for receiving a light beam emitted from the light source and forming a microspot on a multilayer optical recording medium, a photodetector for receiving the light beam reflected by the multilayer optical recording medium and outputting an electrical signal corresponding to the amount of light and a coma aberration correcting element for correcting a coma aberration of the condensing optical system, and a processing circuit for controlling the condensing optical system and the coma aberration correcting element. The processing circuit controls the condensing optical system and the coma aberration correcting element so that the correction of the coma aberration from a value suitable for a first recording layer to a value specified for a second recording layer is started before a movement of a focus position of the microspot from the first recording layer to the second recording layer is completed.

摘要翻译： 光盘装置设置有包括光源的光学头，包括用于接收从光源发射的光束并在多层光学记录介质上形成微点的物镜的聚光光学系统，用于接收光的光电检测器 并且输出对应于光量的电信号和用于校正聚光光学系统的彗形像差的彗形像差校正元件，以及用于控制聚光光学系统和彗形像差的处理电路 校正元件。 处理电路控制聚光光学系统和彗形像差校正元件，使得从适合于第一记录层的值到第二记录层指定的值的彗形像差的校正在聚焦位置的移动之前开始 完成从第一记录层到第二记录层的微点。

公开(公告)号：US07580327B2

公开(公告)日：2009-08-25

申请号：US12002380

申请日：2007-12-17

申请人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

发明人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G02F2203/18 ,  G11B7/0948 ,  G11B7/1369 ,  G11B7/13927 ,  G11B2007/0013

摘要： The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as an optical head and an optical recording/reproducing apparatus using such an optical element. The invention also presents a novel optical recording/reproducing apparatus and optical recording/reproducing method. The optical element, includes a first voltage application electrode 13, a first opposing electrode 17 arranged in opposition to the first voltage application electrode 13, and a first phase changing layer 15 arranged between the first voltage application electrode 13 and the first opposing electrode 17. By changing a voltage between the first voltage application electrode 13 and the first opposing electrode 17, a phase that converts plane waves into spherical waves is imparted on light that is incident on the first phase changing layer 15.

摘要翻译： 本发明提供了一种光学元件，通过该光学元件可以配置光学头，其中当物镜移动时，校正效果几乎没有劣化，以及使用这种光学元件的光学头和光学记录/再现装置。 本发明还提出了一种新颖的光学记录/再现装置和光学记录/再现方法。 光学元件包括第一电压施加电极13，与第一电压施加电极13相对布置的第一相对电极17和布置在第一施加电极13和第一相对电极17之间的第一相变层15。 通过改变第一电压施加电极13和第一相对电极17之间的电压，将入射到第一相变层15上的光转换成球面波的相位。

公开(公告)号：US20090034402A1

公开(公告)日：2009-02-05

申请号：US12280699

申请日：2007-02-27

申请人： Kanji Wakabayashi ,  Yoshiaki Komma ,  Kousei Sano ,  Hidenori Wada ,  Keiichi Matsuzaki ,  Toshiyasu Tanaka

发明人： Kanji Wakabayashi ,  Yoshiaki Komma ,  Kousei Sano ,  Hidenori Wada ,  Keiichi Matsuzaki ,  Toshiyasu Tanaka

IPC分类号： G11B7/00

CPC分类号： G11B7/1362 ,  G11B7/08582 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/1365 ,  G11B7/1374 ,  G11B7/1392 ,  G11B2007/0006

摘要： In an optical head device including a light source for emitting a light of a predetermined wavelength; a collimator lens for converting a divergence degree of the light; a folding mirror for folding a direction of the light emitted from the light source; an objective lens for converging the light on a recording surface of an optical disc; a photodetector for receiving the light reflected at the recording surface of the optical disc, and converting to an electric signal; and an optical path adjustment unit for guiding the light emitted from the light source to the collimator lens and guiding the light reflected at the recording surface of the optical disc to the photodetector; a wavelength plate for polarizing the light reflected by the folding mirror is arranged on an actuator base between the folding mirror and the objective lens.

摘要翻译： 一种光头装置，包括用于发射预定波长的光的光源; 用于转换光的发散度的准直透镜; 用于折叠从光源发射的光的方向的折叠镜; 用于将光会聚在光盘的记录表面上的物镜; 用于接收在光盘的记录表面处反射的光并转换​​成电信号的光电检测器; 以及光路调整单元，用于将从光源发射的光引导到准直透镜，并将在光盘的记录表面处反射的光引导到光电检测器; 用于使由折叠反射镜反射的光偏振的波长板布置在折叠反射镜和物镜之间的致动器基座上。

公开(公告)号：US07352664B2

公开(公告)日：2008-04-01

申请号：US11031634

申请日：2005-01-07

申请人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

发明人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G02F2203/18 ,  G11B7/0948 ,  G11B7/1369 ,  G11B7/13927 ,  G11B2007/0013

摘要： The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as an optical head and an optical recording/reproducing apparatus using such an optical element. The invention also presents a novel optical recording/reproducing apparatus and optical recording/reproducing method. The optical element, includes a first voltage application electrode 13, a first opposing electrode 17 arranged in opposition to the first voltage application electrode 13, and a first phase changing layer 15 arranged between the first voltage application electrode 13 and the first opposing electrode 17. By changing a voltage between the first voltage application electrode 13 and the first opposing electrode 17, a phase that converts plane waves into spherical waves is imparted on light that is incident on the first phase changing layer 15.

公开(公告)号：US20080074982A1

公开(公告)日：2008-03-27

申请号：US11985585

申请日：2007-11-16

申请人： Yoshiaki Komma ,  Hidenori Wada

发明人： Yoshiaki Komma ,  Hidenori Wada

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0948 ,  G11B7/1275 ,  G11B7/1356 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/1378 ,  G11B7/13925 ,  G11B7/13927 ,  G11B2007/0006

摘要： Providing an objective lens with a large numerical aperture (NA), the present invention records or plays conventional optical disks such as CDs and DVDs at high light usage efficiency, using an optical head capable of recording or reproducing high-density optical disks. A diffraction optical element (8) is disposed in a light path of a first light beam of a first wavelength λ1 (400 nm to 415 nm) and a second light beam of a second wavelength λ2 (650 nm to 680 nm). And, the present invention principally emits 5th order diffracted light with respect to the first light beam, and principally emits 3rd order diffracted light with respect to the second light beam, from the diffraction optical element (8). Thus, a high diffraction efficiency of substantially 100% can be obtained with respect to both wavelengths.

公开(公告)号：US07283450B2

公开(公告)日：2007-10-16

申请号：US11386126

申请日：2006-03-22

申请人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/08511 ,  G11B7/1378 ,  G11B7/13925 ,  G11B7/13927 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical disk device is provided with an optical pickup that includes a convergent optical system having an objective lens for converging a light beam emitted from the laser light source to form a microspot on an optical disk and an aberration correcting optical system for controlling a spherical aberration of the convergent optical system, and performs information recording or reproduction with respect to a multi-layer optical disk having at least a first recording layer and a second recording layer. In the optical disk device, an operation of changing a correction quantity of the spherical aberration from a value adequate for the first recording layer to a predetermined value is started before an operation of moving a focus position of the microspot from the first layer to the second layer is completed. This allows a focus control to be performed stably with respect to the second recording layer in a state in which the spherical aberration correction already has been carried out, thereby preventing the focus control from failing due to an unsuccessful interlayer jump.

摘要翻译： 光盘装置具有光学拾取器，该光学拾取器包括会聚光学系统，该会聚光学系统具有用于会聚从激光光源发射的光束以在光盘上形成微点的物镜，以及用于控制球面像差的像差校正光学系统 并且对具有至少第一记录层和第二记录层的多层光盘执行信息记录或再现。 在光盘装置中，将微球的聚焦位置从第一层移动到第二层的操作之前开始将球面像差的校正量从适合于第一记录层的值改变到预定值的操作 层完成。 这允许在已经执行球面像差校正的状态下相对于第二记录层稳定地执行聚焦控制，从而防止聚焦控制由于不成功的层间跳跃而失败。

公开(公告)号：US07164638B2

公开(公告)日：2007-01-16

申请号：US10502242

申请日：2002-12-09

申请人： Hidenori Wada ,  Yoshiaki Komma

发明人： Hidenori Wada ,  Yoshiaki Komma

IPC分类号： G11B11/03

CPC分类号： G11B7/0956 ,  G11B7/1369 ,  G11B7/139 ,  G11B7/13927 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical head for recording/reproducing signals to/from a high-density multi-layer optical recording medium is provided, which is capable of performing stable recording and reproducing with an aberration in each layer being minimized even when the optical recording medium tilts. The optical head includes a light source (1), an objective lens (7) for focusing light emitted from the light source (1) on an optical recording medium (8), and an objective lens tilting means (13) for correcting an aberration that occurs when the optical recording medium (8) tilts. It is configured so as to vary a tilted amount through which the objective lens tilting means (13) tilts the objective lens according to information concerning a tilt of the optical recording medium (8) and information concerning a substrate thickness of the optical recording medium (8).

摘要翻译： 提供了用于向/从高密度多层光学记录介质再现信号的光学头，即使在光学记录介质倾斜的情况下，每个层中的像差都能够进行稳定的记录和再现。 光头包括光源（1），用于将从光源（1）发射的光聚焦在光记录介质（8）上的物镜（7）和用于校正像差的物镜倾斜装置（13） 当光记录介质（8）倾斜时发生。 它被配置成根据关于光记录介质（8）的倾斜的信息和关于光记录介质的基板厚度的信息来改变物镜倾斜装置（13）倾斜物镜的倾斜量 8）。

公开(公告)号：US20060215505A1

公开(公告)日：2006-09-28

申请号：US11443751

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.

公开(公告)号：US20060158994A1

公开(公告)日：2006-07-20

申请号：US11386376

申请日：2006-03-22

申请人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/08511 ,  G11B7/1378 ,  G11B7/13925 ,  G11B7/13927 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical disk device is provided with an optical pickup that includes a convergent optical system having an objective lens for converging a light beam emitted from the laser light source to form a microspot on an optical disk and an aberration correcting optical system for controlling a spherical aberration of the convergent optical system, and performs information recording or reproduction with respect to a multi-layer optical disk having at least a first recording layer and a second recording layer. In the optical disk device, an operation of changing a correction quantity of the spherical aberration from a value adequate for the first recording layer to a predetermined value is started before an operation of moving a focus position of the microspot from the first layer to the second layer is completed. This allows a focus control to be performed stably with respect to the second recording layer in a state in which the spherical aberration correction already has been carried out, thereby preventing the focus control from failing due to an unsuccessful interlayer jump.

公开(公告)号：US20060158993A1

公开(公告)日：2006-07-20

申请号：US11386126

申请日：2006-03-22

申请人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/08511 ,  G11B7/1378 ,  G11B7/13925 ,  G11B7/13927 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical disk device is provided with an optical pickup that includes a convergent optical system having an objective lens for converging a light beam emitted from the laser light source to form a microspot on an optical disk and an aberration correcting optical system for controlling a spherical aberration of the convergent optical system, and performs information recording or reproduction with respect to a multi-layer optical disk having at least a first recording layer and a second recording layer. In the optical disk device, an operation of changing a correction quantity of the spherical aberration from a value adequate for the first recording layer to a predetermined value is started before an operation of moving a focus position of the microspot from the first layer to the second layer is completed. This allows a focus control to be performed stably with respect to the second recording layer in a state in which the spherical aberration correction already has been carried out, thereby preventing the focus control from failing due to an unsuccessful interlayer jump.