公开(公告)号：US06873588B1

公开(公告)日：2005-03-29

申请号：US09700343

申请日：2000-03-14

申请人： Sadao Mizuno ,  Hiroaki Yamamoto ,  Hideki Hayashi ,  Jouji Anzai ,  Tomotada Kamei

发明人： Sadao Mizuno ,  Hiroaki Yamamoto ,  Hideki Hayashi ,  Jouji Anzai ,  Tomotada Kamei

IPC分类号： G11B7/1374 ,  G02B3/08 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1367 ,  G02B3/08 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B7/1398 ,  G11B2007/0006

摘要： An optical head reproduces optical disks of different disk plate thickness thicknesses t1 (0.6 mm) or t2 (1.2 mm) by using light beams of two wavelengths and one object lens. An converging element comprises a central portion and outer portion, wherein the central portion has optimum design plate thickness of 0.6*t1 to t1 and the outer portion has optimum design plate thickness of 0.6 mm. By providing a step difference in the converging element, information can be recorded or reproduced for an information medium of disk plate thickness t1 and for an information medium of disk plate thickness t2, in a state having small side lobes. Alternatively, a step difference is provided in the object lens, and optical distance L2 from a second light source to a condensing optical system is set to 80 to 95% of optical distance L1 from a first light source to the condensing optical system. Alternatively, only light of first wavelength is shielded or diffracted in a ring-like shape.

摘要翻译： 光头通过使用两个波长的光束和一个物镜再现不同盘片厚度t1（0.6mm）或t2（1.2mm）的光盘。 会聚元件包括中心部分和外部部分，其中中心部分具有0.6 * t1至t1的最佳设计板厚度，并且外部部分具有0.6mm的最佳设计板厚度。 通过在会聚元件中提供阶梯差，可以在具有小的旁瓣的状态下，对于盘片厚度t1的信息介质和盘片厚度t2的信息介质来记录或再现信息。 或者，在物镜中设置阶梯差，从第二光源到聚光光学系统的光学距离L2设定为从第一光源到聚光光学系统的光学距离L1的80〜95％。 或者，只有第一波长的光被屏蔽或衍射成环状。

公开(公告)号：US06920102B2

公开(公告)日：2005-07-19

申请号：US10694899

申请日：2003-10-29

申请人： Sadao Mizuno ,  Hiroaki Yamamoto ,  Hideki Hayashi ,  Jouji Anzai ,  Tomotada Kamei

发明人： Sadao Mizuno ,  Hiroaki Yamamoto ,  Hideki Hayashi ,  Jouji Anzai ,  Tomotada Kamei

IPC分类号： G11B7/1374 ,  G02B3/08 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1367 ,  G02B3/08 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B7/1398 ,  G11B2007/0006

摘要： An optical head reproduces optical disks of different disk plate thickness t1 (0.6 mm) or t2 (1.2 mm) by using light beams of two wavelengths and one object lens. An converging element comprises a central portion and outer portion, wherein the central portion has optimum design plate thickness of 0.6*t1 to t1 and the outer portion has optimum design plate thickness of 0.6 mm. By providing a step difference in the converging element, information can be recorded or reproduced for an information medium of disk plate thickness t1 and for an information medium of disk plate thickness t2, in a state having small side lobes. Alternatively, a step difference is provided in the object lens, and optical distance L2 from a second light source to a condensing optical system is set to 80 to 95% of optical distance L1 from a first light source to the condensing optical system. Alternatively, only light of first wavelength is shielded or diffracted in a ring-like shape.

摘要翻译： 光头通过使用两个波长的光束和一个物镜来再现不同盘片厚度t 1（0.6mm）或t 2（1.2mm）的光盘。 收敛元件包括中心部分和外部部分，其中中心部分具有0.6 * t 1至t 1的最佳设计板厚度，并且外部部分具有0.6mm的最佳设计板厚度。 通过在会聚元件中提供阶梯差，可以在具有小的旁瓣的状态下，对于盘片厚度t 1的信息介质和盘片厚度t 2的信息介质来记录或再现信息。 或者，在物镜中设置阶梯差，从第二光源到聚光光学系统的光距离L 2设定为从第一光源到聚光光学系统的光学距离L 1的80〜95％。 或者，只有第一波长的光被屏蔽或衍射成环状。

公开(公告)号：US06859428B2

公开(公告)日：2005-02-22

申请号：US10694993

申请日：2003-10-29

申请人： Sadao Mizuno ,  Hiroaki Yamamoto ,  Hideki Hayashi ,  Jouji Anzai ,  Tomotada Kamei

发明人： Sadao Mizuno ,  Hiroaki Yamamoto ,  Hideki Hayashi ,  Jouji Anzai ,  Tomotada Kamei

IPC分类号： G11B7/1374 ,  G02B3/08 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1367 ,  G02B3/08 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B7/1398 ,  G11B2007/0006

摘要： An optical head reproduces optical disks of different disk plate thickness t1 (0.6 mm) or t2 (1.2 mm) by using light beams of two wavelengths and one object lens. An converging element comprises a central portion and outer portion, wherein the central portion has optimum design plate thickness of 0.6*t1 to t1 and the outer portion has optimum design plate thickness of 0.6 mm. By providing a step difference in the converging element, information can be recorded or reproduced for an information medium of disk plate thickness t1 and for an information medium of disk plate thickness t2, in a state having small side lobes. Alternatively, a step difference is provided in the object lens, and optical distance L2 from a second light source to a condensing optical system is set to 80 to 95% of optical distance L1 from a first light source to the condensing optical system. Alternatively, only light of first wavelength is shielded or diffracted in a ring-like shape.

摘要翻译： 光头通过使用两个波长的光束和一个物镜来再现不同盘片厚度t1（0.6mm）或t2（1.2mm）的光盘。 会聚元件包括中心部分和外部部分，其中中心部分具有0.6 * t1至t1的最佳设计板厚度，并且外部部分具有0.6mm的最佳设计板厚度。 通过在会聚元件中提供阶梯差，可以在具有小的旁瓣的状态下，对于盘片厚度t1的信息介质和盘片厚度t2的信息介质来记录或再现信息。 或者，在物镜中设置阶梯差，从第二光源到聚光光学系统的光学距离L2设定为从第一光源到聚光光学系统的光学距离L1的80〜95％。 或者，只有第一波长的光被屏蔽或衍射成环状。

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：USRE43126E1

公开(公告)日：2012-01-24

申请号：US11529689

申请日：2006-09-28

申请人： Hideki Hayashi ,  Sadao Mizuno ,  Daisuke Ogata ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Jouji Anzai ,  Akihiro Yasuda

发明人： Hideki Hayashi ,  Sadao Mizuno ,  Daisuke Ogata ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Jouji Anzai ,  Akihiro Yasuda

IPC分类号： G11G7/00

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/1353 ,  G11B7/13927 ,  G11B2007/0013

摘要： An optical pickup head is provided with a light source, a diffracting means for creating a plurality of diffracted beams, a converging means for focusing the diffracted beams onto an optical storage medium, a beam branching means for branching the plurality of beams reflected by the optical storage medium, and an optical detecting means for outputting a signal corresponding to the amount of light of the received beams. The optical detecting means has main beam light receiving portions and sub-beam light receiving portions. The amount of light of the first or higher order diffracted beams when they are substantially focused on and reflected by a focus plane of the plurality of information recording planes is equal to or greater than the amount of light of the zero order diffracted beam when it is reflected without focusing by a non-focus plane other then the focus plane of the plurality of information recording planes. The invention provides an optical pickup head where offset is not generated in the TE signals even during tracking with the objective lens when a two-layered disk is used.

摘要翻译： 光拾取头设置有光源，用于产生多个衍射光束的衍射装置，用于将衍射光束聚焦到光存储介质上的会聚装置，用于将由光学器件反射的多个光束分支的光束分支装置 存储介质，以及光检测装置，用于输出对应于接收光束的光量的信号。 光检测装置具有主光束光接收部分和副光束光接收部分。 当它们基本上聚焦在多个信息记录面的聚焦平面上并被其反射时，第一或更高阶衍射光束的光量等于或大于零级衍射光束的光量 反射而不聚焦在多个信息记录平面的焦点平面之外的非聚焦平面。 本发明提供了一种光拾取头，即使在使用双层盘的情况下在物镜进行跟踪期间，也不会在TE信号中产生偏移。

公开(公告)号：US06798723B2

公开(公告)日：2004-09-28

申请号：US10163443

申请日：2002-06-04

申请人： Hideki Hayashi ,  Sadao Mizuno ,  Daisuke Ogata ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Jouji Anzai ,  Akihiro Yasuda

发明人： Hideki Hayashi ,  Sadao Mizuno ,  Daisuke Ogata ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Jouji Anzai ,  Akihiro Yasuda

IPC分类号： G11B700

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/1353 ,  G11B7/13927 ,  G11B2007/0013

摘要： An optical pickup head is provided with a light source, a diffracting means for creating a plurality of diffracted beams, a converging means for focusing the diffracted beams onto an optical storage medium, a beam branching means for branching the plurality of beams reflected by the optical storage medium, and an optical detecting means for outputting a signal corresponding to the amount of light of the received beams. The optical detecting means has main beam light receiving portions and sub-beam light receiving portions. The amount of light of the first or higher order diffracted beams when they are substantially focused on and reflected by a focus plane of the plurality of information recording planes is equal to or greater than the amount of light of the zero order diffracted beam when it is reflected without focusing by a non-focus plane other then the focus plane of the plurality of information recording planes. The invention provides an optical pickup head where offset is not generated in the TE signals even during tracking with the objective lens when a two-layered disk is used.

摘要翻译： 光拾取头设置有光源，用于产生多个衍射光束的衍射装置，用于将衍射光束聚焦到光存储介质上的会聚装置，用于将由光学器件反射的多个光束分支的光束分支装置 存储介质，以及光检测装置，用于输出对应于接收光束的光量的信号。 光检测装置具有主光束光接收部分和副光束光接收部分。 当它们基本上聚焦在多个信息记录面的聚焦平面上并被其反射时，第一或更高阶衍射光束的光量等于或大于零级衍射光束的光量 反射而不聚焦在多个信息记录平面的焦点平面之外的非聚焦平面。 本发明提供了一种光拾取头，即使在使用双层盘的情况下在物镜进行跟踪期间，也不会在TE信号中产生偏移。

公开(公告)号：US5912868A

公开(公告)日：1999-06-15

申请号：US918295

申请日：1997-08-25

申请人： Hideki Hayashi ,  Sadao Mizuno ,  Noboru Ito ,  Kenichiro Urairi ,  Yoshiaki Komma

发明人： Hideki Hayashi ,  Sadao Mizuno ,  Noboru Ito ,  Kenichiro Urairi ,  Yoshiaki Komma

IPC分类号： G11B7/14 ,  G11B7/00 ,  G11B7/12 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/123 ,  G11B7/127 ,  G11B7/1356 ,  G11B7/1381 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

摘要： An optical head for reproducing data from first and second optical disks which are different from each other in at least one of a base material thickness and an available wavelength, includes: a first light source for emitting a first light beam, the first light beam being used for reproducing data from the first optical disk: an optical system designed to converge the first light beam onto the first optical disk in accordance with a base material thickness and an available wavelength of the first optical disk: and a second light source for emitting a second light beam, the second light beam being used for reproducing data from the second optical disk, wherein an optical path length between the second light source and the optical system is different from an optical path length between the first light source and the optical system, and wherein the optical system converges the second light beam onto the second optical disk.

摘要翻译： 一种用于从基材厚度和可用波长中的至少一个中彼此不同的第一和第二光盘再现数据的光学头包括：用于发射第一光束的第一光源，第一光束是 用于从第一光盘再现数据：被设计为根据第一光盘的基材厚度和可用波长将第一光束会聚到第一光盘上的光学系统，以及用于发射第一光盘的第二光源 第二光束，第二光束用于从第二光盘再现数据，其中第二光源和光学系统之间的光路长度不同于第一光源和光学系统之间的光程长度， 并且其中所述光学系统将所述第二光束会聚到所述第二光盘上。

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：US5345072A

公开(公告)日：1994-09-06

申请号：US997293

申请日：1992-12-23

申请人： Hideki Hayashi ,  Shinichi Tanaka ,  Sadao Mizuno ,  Noboru Ito ,  Yoshiaki Komma

发明人： Hideki Hayashi ,  Shinichi Tanaka ,  Sadao Mizuno ,  Noboru Ito ,  Yoshiaki Komma

IPC分类号： G11B7/09 ,  G11B7/135 ,  G01J1/20 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0912

摘要： A focus detection device for use in a focus detection device includes a main light source and two auxiliary light sources. These auxiliary light sources are offset to the main light source along the optical axis of the main optical system while being symmetrically positioned perpendicular to the optical axis. A exposure units having apertures are provided above the two auxiliary light sources for constricting the amount of auxiliary lights so that the convergence of the auxiliary beams on the optical disk is less than that of the main light beam. As a result, an optical system with a broad focus error detection range can be constructed while increasing the convergence of the main light beam.

摘要翻译： 用于焦点检测装置的焦点检测装置包括主光源和两个辅助光源。 这些辅助光源沿着主光学系统的光轴偏移到主光源，同时垂直于光轴对称定位。 具有孔径的曝光单元设置在两个辅助光源上方，用于限制辅助光的量，使得辅助光束在光盘上的会聚小于主光束的会聚。 结果，可以在增加主光束的会聚的同时构造具有宽聚焦误差检测范围的光学系统。