公开(公告)号：US06738332B2

公开(公告)日：2004-05-18

申请号：US09815308

申请日：2001-03-23

申请人： Mitsuru Sato ,  Takanori Maeda

发明人： Mitsuru Sato ,  Takanori Maeda

IPC分类号： G11B700

CPC分类号： G11B7/13927 ,  G11B7/1369 ,  G11B2007/0013

摘要： An optical information recording and reproducing apparatus capable of recording and reproducing information data accurately with respect to an optical recording medium. The optical information recording and reproducing apparatus includes an aberration correction part which corrects aberration of the optical system. The apparatus determines whether or not an aberration correction by the aberration correction part is completed based on the signal level read from the optical recording medium, while changing a spherical aberration correction amount of the aberration correction part. The apparatus commences a recording operation or a reproducing operation of the optical information recording and reproducing apparatus if it is determined that the aberration correction was completed.

摘要翻译： 一种能够相对于光学记录介质准确地记录和再现信息数据的光学信息记录和再现装置。 光信息记录和再现装置包括校正光学系统的像差的像差校正部分。 该装置在改变像差校正部分的球面像差校正量的同时，基于从光学记录介质读取的信号电平来确定像差校正部分的像差校正是否完成。 如果确定了像差校正完成，则设备开始光信息记录和再现设备的记录操作或再现操作。

公开(公告)号：US06597442B2

公开(公告)日：2003-07-22

申请号：US09820284

申请日：2001-03-29

申请人： Takanori Maeda ,  Toshiharu Ezuka

发明人： Takanori Maeda ,  Toshiharu Ezuka

IPC分类号： G01B900

CPC分类号： G01M11/0271 ,  G01M11/0214 ,  G01M11/0242

摘要： An aberration detector for easily detecting aberration of a lens in a short time period by utilizing an interferometer. The aberration detector includes a laser diode, a beam splitter for dividing a light beam into two light beams, an optical system for supporting a lens and converging a light beam passing through the lens to a converging point, a spherical mirror for reflecting the light beam passing through the lens, an image pickup element for detecting an interference pattern obtained by interference of a reference light and the light reflected on the spherical mirror, and an analyzer for analyzing the interference pattern. A center of a sphere constituting the spherical mirror is arranged in a position displaced from the converging point such that a plurality of circular fringes are concentrically arranged on the interference pattern.

摘要翻译： 一种用于通过利用干涉仪在短时间内容易地检测透镜的像差的像差检测器。 像差检测器包括激光二极管，用于将光束分成两个光束的分束器，用于支撑透镜并将通过透镜的光束会聚到会聚点的光学系统，用于反射光束的球面镜 通过透镜，用于检测通过参考光的干涉和反射在球面镜上的光获得的干涉图案的图像拾取元件和用于分析干涉图案的分析器。 构成球面镜的球的中心布置在从会聚点偏移的位置，使得多个圆形条纹同心地布置在干涉图案上。

公开(公告)号：US06473378B2

公开(公告)日：2002-10-29

申请号：US09728058

申请日：2000-12-04

申请人： Mitsuru Sato ,  Takanori Maeda

发明人： Mitsuru Sato ,  Takanori Maeda

IPC分类号： G11B390

CPC分类号： G11B7/126 ,  G11B7/0045

摘要： An optical recording apparatus for writing information on an optical recording medium in which a recording surface is covered with a transparent layer. The information to be written on the optical recording medium is converted into a pulse signal, and spherical aberration occurring due to an error of a thickness of the transparent layer is detected, the pulse signal being controlled in accordance with the detected spherical aberration.

摘要翻译： 一种用于在记录表面被透明层覆盖的光记录介质上写信息的光记录装置。 要写入光记录介质的信息被转换为脉冲信号，并且检测由于透明层的厚度误差而产生的球面像差，根据检测到的球面像差来控制脉冲信号。

公开(公告)号：US06442125B1

公开(公告)日：2002-08-27

申请号：US09245892

申请日：1999-02-08

申请人： Takanori Maeda ,  Yoshitsugu Araki ,  Hajime Koyanagi

发明人： Takanori Maeda ,  Yoshitsugu Araki ,  Hajime Koyanagi

IPC分类号： G11B700

CPC分类号： G11B7/133 ,  G11B7/1353 ,  G11B7/1372 ,  G11B2007/0013

摘要： In an optical pickup, the focal position of the reflected light from the information bearing surface where information is to be reproduced and that of the reflected light from other information bearing surfaces are adjusted by an optical device such that the two reflected light components are separated optically.

摘要翻译： 在光学拾取器中，通过光学装置调整来自信息承载面的反射光的焦点位置以及来自其他信息承载面的反射光的反射光，使得两个反射光成分被光学地分离 。

公开(公告)号：US06370092B1

公开(公告)日：2002-04-09

申请号：US09239714

申请日：1999-01-29

申请人： Yoshitsugu Araki ,  Takanori Maeda ,  Hajime Koyanagi

发明人： Yoshitsugu Araki ,  Takanori Maeda ,  Hajime Koyanagi

IPC分类号： G11B709

CPC分类号： G11B7/1353 ,  G11B7/005 ,  G11B7/0901 ,  G11B7/131 ,  G11B7/1392

摘要： An optical pickup for reading information from a recording medium comprises a light illuminating portion for illuminating a plurality of light beams having different wavefronts onto a recording surface of the recording medium to create a plurality of light spots including a first light spot and a second light spot. The first and second light spots at least partially overlap with each other. A detector receives light beams reflected by the recording medium. The detector has a first light-receiving surface for receiving reflected light of the first light spot and a second light-receiving surface for receiving reflected light of the second light spot.

摘要翻译： 用于从记录介质读取信息的光学拾取器包括用于将具有不同波前的多个光束照射到记录介质的记录表面上的光照射部分，以产生包括第一光点和第二光点的多个光点 。 第一和第二光点彼此至少部分重叠。 检测器接收由记录介质反射的光束。 检测器具有用于接收第一光点的反射光的第一光接收表面和用于接收第二光斑的反射光的第二光接收表面。

公开(公告)号：US5889752A

公开(公告)日：1999-03-30

申请号：US883578

申请日：1997-06-26

申请人： Takanori Maeda ,  Hajime Koyanagi

发明人： Takanori Maeda ,  Hajime Koyanagi

IPC分类号： G11B20/10 ,  G11B7/00 ,  G11B7/005 ,  G11B7/095 ,  G11B7/13 ,  G11B7/14 ,  G11B20/22

CPC分类号： G11B20/22 ,  G11B7/005 ,  G11B7/0956 ,  G11B7/14

摘要： An optical pickup apparatus for properly detecting crosstalk amounts to a read signal for one track from adjacent tracks thereof and their balance. A difference between a second read signal value for one track at a time point when a first read signal value for one adjacent track is smaller than a first threshold value and a third read signal value for the other adjacent track is larger than a second threshold value and a second read signal value at a time point when the first read signal value is larger than the second threshold value and the third read signal value is smaller than the first threshold value is formed as a value indicative of a balance level of crosstalks to the second read signal. A difference between a second read signal value at a time point when the first read signal value is larger than the second threshold value and the third read signal value is larger than the second threshold value and a second read signal value at a time point when the first read signal value is smaller than the first threshold value and the third read signal value is smaller than the first threshold value is formed as a value indicative of a crosstalk amount to the second read signal.

摘要翻译： 用于适当地检测串扰的光学拾取装置相当于来自其相邻轨道的一个轨道的读取信号及其平衡。 当一个相邻磁道的第一读取信号值小于第一阈值的时间点的一个磁道的第二读取信号值与另一个相邻磁道的第三读取信号值之间的差大于第二阈值 并且在第一读取信号值大于第二阈值且第三读取信号值小于第一阈值的时间点处的第二读取信号值被形成为表示与第一阈值的串扰的平衡水平的值 第二读信号。 当第一读取信号值大于第二阈值的时间点处的第二读取信号值和第三读取信号值之间的差值大于第二阈值时的第二读取信号值和在 第一读取信号值小于第一阈值，并且第三读取信号值小于第一阈值形成为指示与第二读取信号的串扰量的值。

公开(公告)号：US5485441A

公开(公告)日：1996-01-16

申请号：US314233

申请日：1994-09-28

申请人： Takanori Maeda

发明人： Takanori Maeda

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B7/125 ,  G11B7/085

CPC分类号： G11B7/127 ,  G11B7/005

摘要： A method of optically reproducing information from an optical recording medium on which concave or convex signal pits are formed, is provided with the steps of: irradiating each of pit edge portions of one signal pit which are opposed to each other, with a reading light respectively; detecting a reflection light from each of pit edge portions, separately, to output two detection signals indicating detected positions of the pit edge portions with respect to one signal pit; and reproducing one information recorded in one signal pit on the basis of the two detection signals.

摘要翻译： 一种从形成凹凸信号凹坑的光记录介质上光信息再现信息的方法，具有以下步骤：分别用一个读取光照射一个信号凹坑的彼此相对的凹坑边缘部分 ; 分别检测来自每个凹坑边缘部分的反射光，以输出指示相对于一个信号凹坑的凹坑边缘部分的检测位置的两个检测信号; 并且基于两个检测信号再现记录在一个信号凹坑中的一个信息。

公开(公告)号：US5177729A

公开(公告)日：1993-01-05

申请号：US524931

申请日：1990-05-18

申请人： Eiji Muramatsu ,  Takanori Maeda

发明人： Eiji Muramatsu ,  Takanori Maeda

IPC分类号： G11B20/18

CPC分类号： G11B20/1816 ,  G11B20/18 ,  Y10S358/907

摘要： A method of and apparatus for reading information, including error correction codes, is disclosed recording information is read out from one track a plurality of times at a reading velocity not lower than at least twice a normal velocity. On the basis of the plural pieces of information read out, the respective quantities of read errors contained in pieces of information are compared with each other so that one of the pieces of read-out information having the minimum quantity of read errors is selected. Accordingly, the selected information to be supplied to the error compensation circuit is the information having the minimum error rate in the sense of probability so that the compensated output further approaches the correct value.

摘要翻译： 公开了一种用于读取信息的方法和装置，包括纠错码，记录信息以不低于正常速度的至少两倍的读取速度从多个轨道读出。 基于读出的多条信息，将包含在多条信息中的读取错误的相应数量彼此进行比较，从而选择具有最小读取误差量的多条读出信息之一。 因此，要提供给误差补偿电路的所选择的信息是具有概率意义上的最小错误率的信息，使得补偿的输出进一步接近正确的值。

公开(公告)号：US4847480A

公开(公告)日：1989-07-11

申请号：US167282

申请日：1988-03-11

申请人： Takanori Maeda ,  Susumu Nomura

发明人： Takanori Maeda ,  Susumu Nomura

IPC分类号： G02B7/28 ,  G11B7/09 ,  G11B7/13

CPC分类号： G11B7/131 ,  G11B7/0909 ,  G11B7/133

摘要： A focus error detecting apparatus is improved by splitting the light detector into three portions, with a first portion located between second and third portions and being elongated. The elongation prevents an out-of-focus condition where the detection light spot is elliptically elongated in the elongation direction from being falsely detected as the focused condition.

公开(公告)号：US20120235039A1

公开(公告)日：2012-09-20

申请号：US13499179

申请日：2009-09-29

申请人： Takanori Maeda ,  Kenjiro Fujimoto ,  Takahiro Kawano ,  Atsushi Onoe

发明人： Takanori Maeda ,  Kenjiro Fujimoto ,  Takahiro Kawano ,  Atsushi Onoe

IPC分类号： G01J5/00

CPC分类号： G01J5/02 ,  B81B3/007 ,  B81B2201/0278 ,  B81B2203/0118 ,  G01J5/024

摘要： A MEMS sensor has a frame portion 2 formed in a rectangular frame shape and a convexoconcave shaped membrane 3 that is constructed within the frame portion 2, the convexoconcave shape of the membrane 3 extend to two direction where a concave and a convex are orthogonal to each other, and square concave portions 3a and square convex portions 3b are disposed in a web shape within a whole in-plane area of the membrane 3.

摘要翻译： MEMS传感器具有形成为矩形框架形状的框架部分2和构造在框架部分2内的凸凹形状的膜3，膜3的凹凸形状延伸到两个方向，其中凹和凸与每个 其他方形凹部3a和方形凸部3b以膜3的整个面内区域配置成网状。