公开(公告)号：US07254107B2

公开(公告)日：2007-08-07

申请号：US10817836

申请日：2004-04-06

申请人： Hidenori Wada ,  Tomotada Kamei ,  Sadao Mizuno ,  Hideki Hayashi

发明人： Hidenori Wada ,  Tomotada Kamei ,  Sadao Mizuno ,  Hideki Hayashi

IPC分类号： G11B7/00

CPC分类号： G11B7/1263 ,  G11B7/1378 ,  G11B7/1381 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical head is provided with: an objective-lens-use opening that determines an aperture of the objective lens; a light-source light-quantity controlling opening that aperture-controls light that has been separated by the light separation device; a light detector that receives light that has been aperture-controlled by the light-source light-quantity controlling opening; and a light detector that receives light that has been reflected by the optical recording medium, and has an arrangement in which: the length of the optical light path from the spherical aberration correcting device to the objective-lens-use opening is made virtually the same as a length of the optical light path from the spherical aberration correcting device to the light-source light-quantity controlling opening, and the aperture of the light-source light-quantity controlling opening has virtually the same size as the aperture of the objective-lens-use opening. The objective of the present invention is to provide an optical head in which a signal outputted from the light quantity detection device is unchanged even when the spherical aberration correcting device is driven so that by using this signal, the quantity of light from the light source is set to an appropriate value.

摘要翻译： 光学头设置有：确定物镜孔径的物镜使用开口; 光源光量控制开口，其对由所述光分离装置分离的光进行开光控制; 光检测器，其接收由光源光量控制开口进行了光圈控制的光; 以及光检测器，其接收由光记录介质反射的光，并且具有以下配置：使从球面像差校正装置到物镜使用开口的光路的长度基本上相同 作为从球面像差校正装置到光源光量控制开口的光路的长度，并且光源光量控制开口的开口具有与物镜光源控制开口的孔径几乎相同的尺寸， 透镜使用开口。 本发明的目的是提供一种光头，其中从光量检测装置输出的信号即使在球面像差校正装置被驱动时也不变，从而通过使用该信号，来自光源的光量是 设置为适当的值。

公开(公告)号：US20050058052A1

公开(公告)日：2005-03-17

申请号：US10817836

申请日：2004-04-06

申请人： Hidenori Wada ,  Tomotada Kamei ,  Sadao Mizuno ,  Hideki Hayashi

发明人： Hidenori Wada ,  Tomotada Kamei ,  Sadao Mizuno ,  Hideki Hayashi

IPC分类号： G11B7/00 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1263 ,  G11B7/1378 ,  G11B7/1381 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical head is provided with: an objective-lens-use opening that determines an aperture of the objective lens; a light-source light-quantity controlling opening that aperture-controls light that has been separated by the light separation device; a light detector that receives light that has been aperture-controlled by the light-source light-quantity controlling opening; and a light detector that receives light that has been reflected by the optical recording medium, and has an arrangement in which: the length of the optical light path from the spherical aberration correcting device to the objective-lens-use opening is made virtually the same as a length of the optical light path from the spherical aberration correcting device to the light-source light-quantity controlling opening, and the aperture of the light-source light-quantity controlling opening has virtually the same size as the aperture of the objective-lens-use opening. The objective of the present invention is to provide an optical head in which a signal outputted from the light quantity detection device is unchanged even when the spherical aberration correcting device is driven so that by using this signal, the quantity of light from the light source is set to an appropriate value.

摘要翻译： 光学头设置有：确定物镜孔径的物镜使用开口; 光源光量控制开口，其对由所述光分离装置分离的光进行开光控制; 光检测器，其接收由光源光量控制开口进行了光圈控制的光; 以及光检测器，其接收由光记录介质反射的光，并且具有以下配置：使从球面像差校正装置到物镜使用开口的光路的长度基本上相同 作为从球面像差校正装置到光源光量控制开口的光路的长度，并且光源光量控制开口的开口具有与物镜光源控制开口的孔径几乎相同的尺寸， 透镜使用开口。 本发明的目的是提供一种光头，其中从光量检测装置输出的信号即使在球面像差校正装置被驱动时也不变，从而通过使用该信号，来自光源的光量是 设置为适当的值。

公开(公告)号：US5440536A

公开(公告)日：1995-08-08

申请号：US202518

申请日：1994-02-28

申请人： Noboru Ito ,  Shinichi Tanaka ,  Hidenori Wada ,  Sadao Mizuno ,  Hideki Hayashi

发明人： Noboru Ito ,  Shinichi Tanaka ,  Hidenori Wada ,  Sadao Mizuno ,  Hideki Hayashi

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/09 ,  G11B7/13

CPC分类号： G11B7/131 ,  G11B7/0045 ,  G11B7/0943

摘要： An optical disk apparatus includes a photodetector divided into eight segments which receive the laser beam reflected from the optical disk and produce signals based on the laser beam sport thereon. In this apparatus, these eight segments are combined in several patterns for the recorded information reproduction, the tracking error detection, and the focus error detection, respectively. For the recorded information reproduction, eight segments are used as combined in three segment cells RC1, RC2, and RC3 which extend in a direction parallel to each other such that the segment cell RC1 is in center and is sandwitched by other segment cell RC2 and RC3. The segment cells RC1, RC2, and RC3 are located perpendicular to the recording track of the optical disk and produce three signals C, R, and L indicative of the laser beam intensity of the laser beam spot thereon, respectively. Thus obtained signals C is multiplied by a constant K and then added to the other signals R and L. By selecting suitable value as the constant K, the crosstalk component in the reproduced signal can be reduced.

摘要翻译： 光盘装置包括被分成八个部分的光电检测器，其接收从光盘反射的激光束并基于其上的激光束运动产生信号。 在这种装置中，这八个段分别以记录信息再现，跟踪误差检测和聚焦误差检测的多种模式组合。 对于记录的信息再现，八个段被组合在三个分段单元RC1，RC2和RC3中，它们在彼此平行的方向上延伸，使得分段单元RC1处于中心并被其它分段单元RC2和RC3 。 分段单元RC1，RC2和RC3垂直于光盘的记录轨道定位，并分别产生表示激光束点的激光束强度的三个信号C，R和L。 这样获得的信号C乘以常数K，然后加到其他信号R和L.通过选择合适的值作为常数K，可以减少再现信号中的串扰分量。

公开(公告)号：US07079456B2

公开(公告)日：2006-07-18

申请号：US10613672

申请日：2003-07-03

申请人： Hidenori Wada ,  Yasuhiro Tanaka ,  Hideki Hayashi ,  Sadao Mizuno

发明人： Hidenori Wada ,  Yasuhiro Tanaka ,  Hideki Hayashi ,  Sadao Mizuno

IPC分类号： G11B7/95

CPC分类号： G11B7/1378 ,  G11B7/1392 ,  G11B7/13925 ,  G11B7/13927 ,  G11B2007/0006

摘要： An optical element having a high capture efficiency and rim intensity is provided. The optical element includes a central axis, a first curved surface extending in the transverse direction with respect to the central axis, a second curved surface extending in the transverse direction with respect to the central axis, and a peripheral surface extending between the first curved surface and the second curved surface. Light is refracted from the time light is incident on the first curved surface to the time the light is emitted from the second curved surface. Thereby, a light intensity distribution of the light emitted from the second curved surface and a light intensity distribution of the light incident on the first curved surface are different from each other, and a rim intensity improvement rate R, which is a rate of the rim intensity of the emitted light with respect to the rim intensity of the incident light is 1.07 or more and 1.5 or less, in which the rim intensity represents a ratio of the central intensity to the peripheral intensity.

摘要翻译： 提供具有高捕获效率和边缘强度的光学元件。 光学元件包括中心轴线，相对于中心轴线在横向方向上延伸的第一弯曲表面，相对于中心轴线沿横向方向延伸的第二弯曲表面，以及在第一弯曲表面 和第二曲面。 光从第一弯曲表面入射到光从第二弯曲表面发射的时间被折射。 由此，从第二曲面发出的光的光强度分布和入射在第一曲面上的光的光强度分布彼此不同，作为轮缘的速度的轮辋强度提高率R 相对于入射光的边缘强度的发射光的强度为1.07以上且1.5以下，其中边缘强度表示中心强度与周边强度的比率。

公开(公告)号：US5347504A

公开(公告)日：1994-09-13

申请号：US993384

申请日：1992-12-18

申请人： Noboru Ito ,  Shinichi Tanaka ,  Hidenori Wada ,  Sadao Mizuno ,  Hideki Hayashi

发明人： Noboru Ito ,  Shinichi Tanaka ,  Hidenori Wada ,  Sadao Mizuno ,  Hideki Hayashi

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/09 ,  G11B7/13

CPC分类号： G11B7/131 ,  G11B7/0045 ,  G11B7/0943

摘要： An optical disk apparatus includes a photodetector divided into eight segments which receive the laser beam reflected from the optical disk and produce signals based on the laser beam sport thereon. In this apparatus, these eight segments are combined in several patterns for the recorded information reproduction, the tracking error detection, and the focus error detection, respectively. For the recorded information reproduction, eight segments are used as combined in three segment cells RC1, RC2, and RC3 which extend in a direction parallel to each other such that the segment cell RC1 is in center and is sandwitched by other segment cell RC2 and RC3. The segment cells RC1, RC2, and RC3 are located perpendicular to the recording track of the optical disk and produce three signals C, R, and L indicative of the laser beam intensity of the laser beam spot thereon, respectively. Thus obtained signals C is multiplied by a constant K and then added to the other signals R and L. By selecting suitable value as the constant K, the crosstalk component in the reproduced signal can be reduced.

摘要翻译： 光盘装置包括被分成八个部分的光电检测器，其接收从光盘反射的激光束并基于其上的激光束运动产生信号。 在这种装置中，这八个段分别以记录信息再现，跟踪误差检测和聚焦误差检测的多种模式组合。 对于记录的信息再现，八个段被组合在三个分段单元RC1，RC2和RC3中，它们在彼此平行的方向上延伸，使得分段单元RC1处于中心并被其它分段单元RC2和RC3 。 分段单元RC1，RC2和RC3垂直于光盘的记录轨道定位，并分别产生表示激光束点的激光束强度的三个信号C，R和L。 这样获得的信号C乘以常数K，然后加到其他信号R和L.通过选择合适的值作为常数K，可以减少再现信号中的串扰分量。

公开(公告)号：US5430701A

公开(公告)日：1995-07-04

申请号：US202822

申请日：1994-02-28

申请人： Noboru Ito ,  Shinichi Tanaka ,  Hidenori Wada ,  Sadao Mizuno ,  Hideki Hayashi

发明人： Noboru Ito ,  Shinichi Tanaka ,  Hidenori Wada ,  Sadao Mizuno ,  Hideki Hayashi

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/09 ,  G11B7/13

CPC分类号： G11B7/131 ,  G11B7/0045 ,  G11B7/0943

摘要： An optical disk apparatus includes a photodetector divided into eight segments which receive the laser beam reflected from the optical disk and produce signals based on the laser beam sport thereon. In this apparatus, these eight segments are combined in several patterns for the recorded information reproduction, the tracking error detection, and the focus error detection, respectively. For the recorded information reproduction, eight segments are used as combined in three segment cells RC1, RC2, and RC3 which extend in a direction parallel to each other such that the segment cell RC1 is in center and is sandwitched by other segment cell RC2 and RC3. The segment cells RC1, RC2, and RC3 are located perpendicular to the recording track of the optical disk and produce three signals C, R, and L indicative of the laser beam intensity of the laser beam spot thereon, respectively. Thus obtained signals C is multiplied by a constant K and then added to the other signals R and L. By selecting suitable value as the constant K, the crosstalk component in the reproduced signal can be reduced.

摘要翻译： 光盘装置包括被分成八个部分的光电检测器，其接收从光盘反射的激光束并基于其上的激光束运动产生信号。 在这种装置中，这八个段分别以记录信息再现，跟踪误差检测和聚焦误差检测的多种模式组合。 对于记录的信息再现，八个段被组合在三个分段单元RC1，RC2和RC3中，它们在彼此平行的方向上延伸，使得分段单元RC1处于中心并被其它分段单元RC2和RC3 。 分段单元RC1，RC2和RC3垂直于光盘的记录轨道定位，并分别产生表示激光束点的激光束强度的三个信号C，R和L。 这样获得的信号C乘以常数K，然后加到其他信号R和L.通过选择合适的值作为常数K，可以减少再现信号中的串扰分量。

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：US06480454B1

公开(公告)日：2002-11-12

申请号：US09460128

申请日：1999-12-13

申请人： Hidenori Wada ,  Daisuke Ogata ,  Sadao Mizuno ,  Seiji Nishino ,  Tetsuo Saimi

发明人： Hidenori Wada ,  Daisuke Ogata ,  Sadao Mizuno ,  Seiji Nishino ,  Tetsuo Saimi

IPC分类号： G11B700

CPC分类号： G11B7/13925 ,  G02F1/13306 ,  G02F1/133502 ,  G02F1/134309 ,  G02F1/13439 ,  G02F2203/18 ,  G11B7/0956 ,  G11B7/1353 ,  G11B7/1369

摘要： The invention presents an optical element that has a good correcting effect with regard to aberrations and is easy to manufacture, as well as an optical head and an optical recording and reproducing apparatus using the same. The optical element includes a first substrate, a second substrate arranged substantially in parallel to the first substrate, a voltage applying electrode arranged between the first substrate and a liquid crystal, an opposing electrode arranged substantially in parallel to the voltage applying electrode and opposing the voltage applying electrode, and a liquid crystal arranged between the first substrate and the second substrate. By changing the voltage between the voltage applying electrode and the opposing electrode, the phase of the light incident on the liquid crystal can be changed.

摘要翻译： 本发明提供一种光学元件，其具有关于像差的良好校正效果并且易于制造，以及光学头和使用该光学元件的光学记录和再现装置。 光学元件包括第一基板，基本上平行于第一基板布置的第二基板，布置在第一基板和液晶之间的电压施加电极，基本上平行于电压施加电极布置的对置电极， 施加电极和布置在第一基板和第二基板之间的液晶。 通过改变施加电压和对置电极之间的电压，可以改变入射在液晶上的光的相位。

公开(公告)号：US06292441B1

公开(公告)日：2001-09-18

申请号：US09061822

申请日：1998-04-16

申请人： Hiroaki Yamamoto ,  Daisuke Ogata ,  Ken'ichi Kasazumi ,  Seiji Nishino ,  Hidenori Wada ,  Sadao Mizuno

发明人： Hiroaki Yamamoto ,  Daisuke Ogata ,  Ken'ichi Kasazumi ,  Seiji Nishino ,  Hidenori Wada ,  Sadao Mizuno

IPC分类号： G11B700

CPC分类号： G11B7/131 ,  G11B7/0908 ,  G11B7/094 ,  G11B7/1353 ,  G11B7/1381

摘要： An optical head device includes a light source for emitting a light beam having a predetermined wavelength, an optical system for converging the light beam emitted from the light source on an information medium, and a light detector for receiving the light beam reflected from the information medium and detecting a focus error signal based on the received light beam. The light detector includes a plurality of pairs of photodetectors. The light detector generates the focus error signal based on a differential signal generated by each pair of the plurality of pairs of photodetectors. The plurality of pairs of photodetectors are arranged so that a fluctuation in the differential signal generated by at least one of the pairs of the plurality of pairs of photodetectors is cancelled by a fluctuation in the differential signal generated by at least another of the pairs of the plurality of pairs of photodetectors.

摘要翻译： 光头装置包括用于发射具有预定波长的光束的光源，用于将从光源发射的光束会聚在信息介质上的光学系统，以及用于接收从信息介质反射的光束的光检测器 以及基于所接收的光束检测聚焦误差信号。 光检测器包括多对光电检测器。 光检测器基于由每对多个光电检测器生成的差分信号产生聚焦误差信号。 多对光检测器被布置成使得由多对光检测器中的至少一对成对的光检测器产生的差分信号的波动被由至少另一对成对的光检测器产生的差分信号的波动所抵消 多对光电探测器。

公开(公告)号：US20080013414A1

公开(公告)日：2008-01-17

申请号：US11597996

申请日：2005-05-31

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 comprising a light source, an objective lens for condensing light emitted from the light source to the optical recording medium, and a light-separating means 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 is characterized in that the light-separating means consists of 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, and the majority of the light emitted from the light source enters into the light-separating means 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 为了将从光记录介质反射的光与从光源发射的光分离，物镜的特征在于，分光装置由第一玻璃，形成在第一玻璃上的多层膜和粘合剂 层，以将第二玻璃粘合到多层膜上，并且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。