公开(公告)号：US20100177619A1

公开(公告)日：2010-07-15

申请号：US12376595

申请日：2006-10-04

申请人： Makoto Sato ,  Masakazu Ogasawara ,  Takuma Yanagisawa

发明人： Makoto Sato ,  Masakazu Ogasawara ,  Takuma Yanagisawa

IPC分类号： G11B7/00

CPC分类号： G11B7/0901 ,  G11B7/0909 ,  G11B7/133 ,  G11B7/1353 ,  G11B2007/0013

摘要： A pickup device which, focusing a ray bundle on a track of a recording surface of an optical recording medium to form a light spot, comprises a detection optical system including a photo detector to receive return light reflected from the light spot via an objective lens and perform photoelectric conversion. The photo detector has at least two photoreceptor sections positioned axis-symmetrical with respect to a detection-side division line extending through an optical axis of the return light and parallel to the track. A dividing element placed in an optical path between the photo detector and the objective lens includes at least two inner divided areas positioned axis-symmetrical with respect to a deflection-side division line extending through the optical axis of the return light and parallel to the track, and at least two outer divided areas positioned sandwiching the inner divided areas and axis-symmetrical with respect to the deflection-side division line. The inner divided areas are formed such that parts of a light beam from the other region than overlap regions, divided axis-symmetrically along the deflection-side division line, are exchanged in position across the detection-side division line and directed to the photoreceptor sections of the photo detector so as to be axis-symmetrical with respect to the detection-side division line.

摘要翻译： 一种拾取装置，其将光束聚焦在光记录介质的记录表面的轨道上以形成光点，包括检测光学系统，其包括光电检测器，以接收经由物镜从光点反射的返回光;以及 执行光电转换。 光检测器具有至少两个相对于延伸通过返回光的光轴并平行于轨道的检测侧分割线轴对称的感光体部分。 放置在光检测器和物镜之间的光路中的分隔元件包括至少两个相对于延伸穿过返回光的光轴并平行于轨道的偏转侧分割线轴对称的内分割区域 以及至少两个外分割区域，其定位为夹着内分割区域并相对于偏转侧分割线轴对称。 内部分割区域被形成为使得来自另一区域的光束的部分比沿着偏转侧分割线轴对称分割的重叠区域的部分在检测侧分割线上交替位置并且被引导到感光体部分 的光检测器相对于检测侧分割线轴对称。

公开(公告)号：US07969836B2

公开(公告)日：2011-06-28

申请号：US12521959

申请日：2007-01-05

申请人： Takuma Yanagisawa ,  Masakazu Ogasawara ,  Makoto Sato

发明人： Takuma Yanagisawa ,  Masakazu Ogasawara ,  Makoto Sato

IPC分类号： G11B7/00

CPC分类号： G11B7/133 ,  G11B7/0903 ,  G11B7/094 ,  G11B7/131

摘要： An optical pickup apparatus reads an information signal recorded on a recording surface of an optical disk along a track by projecting a light beam. Said optical pickup apparatus has: an objective lens for converging said light beam onto said recording surface; an objective lens moving device for moving said objective lens in a radial direction of said optical disk; and a divisional photosensing device for receiving return light reflected by said optical disk, in a plurality of divided regions. Said divisional photosensing device has: a first divisional photosensing device for dividing a first region including both edge portions in said radial direction of said return light, in two divided areas in said radial direction; a second divisional photosensing device for receiving a second region including both edge portions in a direction which perpendicularly crosses said radial direction of said return light, in two divided areas in said radial direction; and a third divisional photosensing device for receiving a third region including an almost center portion of said return light, in two divided areas in said radial direction.

摘要翻译： 光拾取装置通过投影光束沿着轨道读取记录在光盘的记录表面上的信息信号。 所述光学拾取装置具有：用于将所述光束会聚到所述记录表面上的物镜; 用于在所述光盘的径向上移动所述物镜的物镜移动装置; 以及分割光敏装置，用于在多个分割区域中接收由所述光盘反射的返回光。 所述分光感测装置具有：第一分光感测装置，用于在所述径向方向上的两个分割区域中分割包括所述返回光的所述径向方向上的两个边缘部分的第一区域; 第二分光光感测装置，用于在所述径向方向的两个分割区域中接收包括垂直于所述返回光的所述径向方向的两个边缘部分的第二区域; 以及第三分光感测装置，用于在所述径向方向上的两个分割区域中接收包括所述返回光的几乎中心部分的第三区域。

公开(公告)号：US20090278029A1

公开(公告)日：2009-11-12

申请号：US12441839

申请日：2006-11-01

申请人： Masakazu Ogasawara ,  Takuma Yanagisawa ,  Makoto Sato

发明人： Masakazu Ogasawara ,  Takuma Yanagisawa ,  Makoto Sato

IPC分类号： G02B27/40 ,  G02B27/64

CPC分类号： G11B7/094 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1353 ,  G11B7/1395 ,  G11B2007/0013

摘要： A pickup device includes an irradiation optical system containing an objective lens for forming a spot by converging a light beam onto a track of a recording surface of an optical recording medium having a plurality of laminated recording layers; and a detection optical system containing a photodetector for receiving, through the objective lens, return light which was reflected and returned from the spot to perform a photoelectric conversion, in which a position of the objective lens is controlled in response to an electric signal arithmetically operated from an output of the photodetector. The photodetector includes a plurality of photosensing element groups which are arranged away from each other on a plane to which an optical axis of the return light penetrates perpendicularly and each of the groups is composed of a plurality of photosensing elements. The pickup device further comprises a dividing element disposed on another plane to which the optical axis of the return light penetrates perpendicularly. The dividing element has: at least two division regions which are formed so as to be line-symmetrical with respect to a track directional line which intersects with the optical axis of the return light and extends in parallel with the track; at least two division regions which are formed so as to be line-symmetrical with respect to a track vertical line which intersects with the optical axis of the return light and extends in the direction perpendicular to the track; and a center division region which includes the optical axis of the return light and is formed so as to be point-symmetrical with respect to the optical axis of the return light. The dividing element divides the return light into a plurality of partial light beams at respective division regions to deflecting the partial light beams from the division regions other than the center division region to the photosensing element groups.

摘要翻译： 拾取装置包括照射光学系统，其包含用于通过将光束会聚到具有多个层压记录层的光学记录介质的记录表面的轨道上而形成点的物镜; 以及检测光学系统，其包含光检测器，用于通过物镜接收从点反射和返回的返回光，以进行光电转换，其中物镜的位置响应于电信号被算术运算 从光电检测器的输出。 光电检测器包括多个光敏元件组，它们在返回光的光轴垂直穿过的平面上彼此远离布置，并且每个组由多个感光元件组成。 拾取装置还包括设置在返回光的光轴垂直穿过的另一平面上的分隔元件。 分割元件具有至少两个划分区域，其形成为相对于与返回光的光轴相交并且与轨道平行延伸的轨道方向线线对称; 至少两个划分区域，其形成为相对于与返回光的光轴相交的轨道垂直线线性对称，并且在垂直于轨道的方向上延伸; 以及包括返回光的光轴并形成为相对于返回光的光轴点对称的中心分割区域。 分割元件将返回光分成各个分割区域的多个局部光束，以将来自除了中心分割区域之外的分割区域的部分光束偏转到光敏元件组。

公开(公告)号：US08238220B2

公开(公告)日：2012-08-07

申请号：US12376595

申请日：2006-10-04

申请人： Makoto Sato ,  Masakazu Ogasawara ,  Takuma Yanagisawa

发明人： Makoto Sato ,  Masakazu Ogasawara ,  Takuma Yanagisawa

IPC分类号： G11B7/00 ,  G11B7/135

CPC分类号： G11B7/0901 ,  G11B7/0909 ,  G11B7/133 ,  G11B7/1353 ,  G11B2007/0013

摘要： A pickup device comprising an irradiation optical system including an objective lens to focus a ray bundle on a track of a recording surface of an optical recording medium to form a light spot, and a detection optical system including a photo detector to receive return light reflected from the light spot via the objective lens and perform photoelectric conversion and controls said objective lens in position according to electrical signals produced through operations on outputs of said photo detector.

摘要翻译： 一种拾取装置，包括：包括物镜的照射光学系统，用于将光束聚焦在光记录介质的记录表面的轨道上以形成光点;以及检测光学系统，包括光电检测器，用于接收从 通过物镜进行光点并执行光电转换，并且根据通过对所述光电检测器的输出进行的操作产生的电信号将所述物镜控制在适当位置。

公开(公告)号：US20090310469A1

公开(公告)日：2009-12-17

申请号：US12521959

申请日：2007-01-05

申请人： Takuma Yanagisawa ,  Masakazu Ogasawara ,  Makoto Sato

发明人： Takuma Yanagisawa ,  Masakazu Ogasawara ,  Makoto Sato

IPC分类号： G11B7/135

CPC分类号： G11B7/133 ,  G11B7/0903 ,  G11B7/094 ,  G11B7/131

摘要： An optical pickup apparatus reads an information signal recorded on a recording surface of an optical disk along a track by projecting a light beam. Said optical pickup apparatus has: an objective lens for converging said light beam onto said recording surface; an objective lens moving device for moving said objective lens in a radial direction of said optical disk; and a divisional photosensing device for receiving return light reflected by said optical disk, in a plurality of divided regions. Said divisional photosensing device has: a first divisional photosensing device for dividing a first region including both edge portions in said radial direction of said return light, in two divided areas in said radial direction; a second divisional photosensing device for receiving a second region including both edge portions in a direction which perpendicularly crosses said radial direction of said return light, in two divided areas in said radial direction; and a third divisional photosensing device for receiving a third region including an almost center portion of said return light, in two divided areas in said radial direction.

摘要翻译： 光拾取装置通过投影光束沿着轨道读取记录在光盘的记录表面上的信息信号。 所述光学拾取装置具有：用于将所述光束会聚到所述记录表面上的物镜; 用于在所述光盘的径向上移动所述物镜的物镜移动装置; 以及分割光敏装置，用于在多个分割区域中接收由所述光盘反射的返回光。 所述分光感测装置具有：第一分光感测装置，用于在所述径向方向上的两个分割区域中分割包括所述返回光的所述径向方向上的两个边缘部分的第一区域; 第二分光光感测装置，用于在所述径向方向的两个分割区域中接收包括垂直于所述返回光的所述径向方向的两个边缘部分的第二区域; 以及第三分光感测装置，用于在所述径向方向上的两个分割区域中接收包括所述返回光的几乎中心部分的第三区域。

公开(公告)号：US07151736B2

公开(公告)日：2006-12-19

申请号：US10655349

申请日：2003-09-05

申请人： Takuma Yanagisawa ,  Makoto Sato

发明人： Takuma Yanagisawa ,  Makoto Sato

IPC分类号： G11B7/00

CPC分类号： G11B7/13927 ,  G11B7/1369 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An objective lens for converging light onto an information recording medium includes a refracting interface for converging an incident light into a convergent light, and a refractive index varying member disposed between the refracting interface and the information recording medium, and having a refractive index that is varied according to an externally applied voltage.

摘要翻译： 用于将光会聚在信息记录介质上的物镜包括用于将入射光会聚到会聚光的折射界面和设置在折射界面和信息记录介质之间并具有变化的折射率的折射率变化部件 根据外部施加的电压。

公开(公告)号：US20120069723A1

公开(公告)日：2012-03-22

申请号：US13265684

申请日：2009-04-24

申请人： Makoto Sato ,  Masakazu Ogasawara ,  Kazuo Takahashi ,  Masaharu Nakano

发明人： Makoto Sato ,  Masakazu Ogasawara ,  Kazuo Takahashi ,  Masaharu Nakano

IPC分类号： G11B7/00

CPC分类号： G11B7/0938 ,  G11B7/0908 ,  G11B7/1356 ,  G11B7/1378 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0013

摘要： An optical recording medium drive device including: a combining prism for combining a recording first laser beam emitted from a first light source with a recording second laser beam emitted from the first light source so as to coaxially guide them; an objective lens for condensing the first and second laser beams from the combining prism toward an optical recording medium; a first photodetecting means for detecting reflected light of the first laser beam from a recording layer; a second photodetecting means for detecting reflected light of the second laser beam from a guide layer; a magnification conversion element disposed on an optical path of the second laser beam between a second light source and the combining prism for diffusing or converging the second laser beam incident upon the objective lens; a first focus error generating means for generating a first focus error signal indicating an error between a condensed spot position of the first laser beam and the recording layer based on an output signal of the first photodetecting means; a second focus error generating means for generating a second focus error signal indicating an error between a condensed spot position of the second laser beam and the guide layer based on an output signal of the second photodetecting means; a first focus control means for controlling the objective lens in an optical axis direction thereof in accordance with the first focus error signal; and a second focus control means for controlling a magnitude of the diffusion or convergence of the second laser beam by the magnification conversion element in accordance with the second focus error signal.

摘要翻译： 一种光记录介质驱动装置，包括：组合棱镜，用于将从第一光源发射的记录第一激光束与从第一光源发射的记录第二激光束组合以同轴地引导它们; 用于将来自组合棱镜的第一和第二激光束聚光到光学记录介质的物镜; 用于从记录层检测第一激光束的反射光的第一光检测装置; 用于从引导层检测第二激光束的反射光的第二光电检测装置; 放大转换元件，设置在所述第二激光束的光路上，在第二光源与所述组合棱镜之间，用于使入射到所述物镜上的所述第二激光束扩散或会聚; 第一聚焦误差产生装置，用于基于第一光电检测装置的输出信号产生指示第一激光束的聚光点位置与记录层之间的误差的第一聚焦误差信号; 第二聚焦误差产生装置，用于基于第二光电检测装置的输出信号产生指示第二激光束的聚光点位置与引导层之间的误差的第二聚焦误差信号; 第一聚焦控制装置，用于根据第一聚焦误差信号在其光轴方向上控制物镜; 以及第二焦点控制装置，用于根据第二聚焦误差信号来控制放大转换元件的第二激光束的扩散或会聚的大小。

公开(公告)号：US08111604B2

公开(公告)日：2012-02-07

申请号：US12593036

申请日：2007-03-29

申请人： Masaharu Nakano ,  Masakazu Ogasawara ,  Makoto Sato

发明人： Masaharu Nakano ,  Masakazu Ogasawara ,  Makoto Sato

IPC分类号： G11B7/24

CPC分类号： G11B7/26 ,  G11B7/0045 ,  G11B7/00745 ,  G11B7/0908 ,  G11B7/24038

摘要： A fabrication method of a multilayer optical recording medium having a plurality of recording layers, comprises a step of preparing an optical recording medium having at least one record area; a write-position mark generating step of recording write-position marks in the record area beforehand; a step of preparing an optical system including a common objective lens to focus a data recording beam and a position mark recording beam on different positions in a thickness direction of the record area; a first data writing step of writing data between the write-position marks with following the write-position marks by the data recording beam; a position mark recording step of, in parallel with the first data writing step, recording new write-position marks in the record area by the position mark recording beam; and a second data writing step of writing data between the new write-position marks with following the new write-position marks by the data recording beam.

摘要翻译： 一种具有多个记录层的多层光学记录介质的制造方法，包括制备具有至少一个记录区域的光学记录介质的步骤; 写入位置标记生成步骤，预先在记录区域中记录写入位置标记; 准备包括用于将数据记录光束和位置标记记录光束聚焦在记录区域的厚度方向上的不同位置上的公共物镜的光学系统的步骤; 第一数据写入步骤，在写入位置标记之间通过数据记录光束跟随写入位置标记来写入数据; 位置标记记录步骤，与第一数据写入步骤并行，通过位置标记记录光束在记录区域中记录新的写入位置标记; 以及第二数据写入步骤，用于通过数据记录光束在新的写入位置标记之间写入新的写入位置标记之间的数据。

公开(公告)号：US20080232203A1

公开(公告)日：2008-09-25

申请号：US10593649

申请日：2005-03-17

申请人： Masakazu Ogasawara ,  Makoto Sato ,  Ikuya Kikuchi

发明人： Masakazu Ogasawara ,  Makoto Sato ,  Ikuya Kikuchi

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0948 ,  G11B7/1275 ,  G11B7/13927 ,  G11B2007/0006

摘要： An optical pickup projects laser beams having the first to the third wavelengths, in response to the type of a recording medium which is an object to which recording or reproduction is to be performed, and reflecting light from the recording medium is received by a light-detecting element. In order to reduce the sizes of the optical pickup, light of the second and the third wavelengths is generated by a single dual-wavelength light source, and reflecting light of all the wavelengths is to be received by the single light-detecting element. A hologram element giving different optical effects to light of each wavelength is arranged between the light irradiating means and the light-detecting element. Thus, appropriate information recording and reproduction can be performed by using light of each wavelength.

摘要翻译： 响应于要进行记录或再现的对象的记录介质的类型，并且来自记录介质的光被反射光接收，光拾取器投射具有第一至第三波长的激光束， 检测元件。 为了减小光学拾取器的尺寸，通过单个双波长光源产生第二和第三波长的光，并且所有波长的反射光将被单个光检测元件接收。 在光照射装置和光检测元件之间布置有对每个波长的光赋予不同光学效果的全息元件。 因此，可以通过使用每个波长的光来执行适当的信息记录和再现。

公开(公告)号：US20050047311A1

公开(公告)日：2005-03-03

申请号：US10916452

申请日：2004-08-12

申请人： Makoto Sato ,  Masakazu Ogasawara

发明人： Makoto Sato ,  Masakazu Ogasawara

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

CPC分类号： G11B7/13925 ,  G11B2007/0006

摘要： A disk reproducing apparatus for reproducing a disk that is any one of three kinds of disks, BD, DVD and CD, employing a BD objective lens, correct only aberration occurring inside the effective diameter of DVD, and leaves aberration outside the effective diameter, when reproducing DVD. Likewise, the disk reproducing apparatus corrects only aberration occurring inside the effective diameter of CD, and leaves aberration outside the effective diameter, when reproducing CD.

摘要翻译： 一种用于再现使用BD物镜的三种盘BD，DVD和CD中的任何一种的盘的盘再现装置，仅校正在DVD的有效直径内发生的像差，并且在有效直径之外离开像差，当 复制DVD。 同样地，当再现CD时，盘重放装置仅校正发生在CD的有效直径内的像差，并且在有效直径之外留下像差。