公开(公告)号：US06628589B2

公开(公告)日：2003-09-30

申请号：US09816073

申请日：2001-03-26

申请人： Masayuki Iwasaki ,  Masakazu Ogasawara

发明人： Masayuki Iwasaki ,  Masakazu Ogasawara

IPC分类号： G11B390

CPC分类号： G11B7/13925 ,  G11B7/1369 ,  G11B2007/0006

摘要： An apparatus and a method are provided for compensating an aberration occurring in a reflected light beam from a recording medium. The apparatus includes a liquid crystal unit including a first electrode layer having divisional electrodes and a second electrode layer, and a liquid crystal element which provides a light beam with a phase change when an electric field is applied; a detector for receiving the reflected light beam through the liquid crystal unit to generate a detection signal; a voltage generator for generating voltages to be applied to the divisional electrodes; and a controller for performing aberration compensation control by changing the applied voltages to each of the divisional electrodes with reference to an applied reference voltage to a predetermined divisional electrode. The controller determines the applied reference voltage based on an amplitude change of the detection signal when the applied voltages to the divisional electrodes are changed.

摘要翻译： 提供了一种用于补偿从记录介质反射的光束中发生的像差的装置和方法。 该装置包括：液晶单元，包括具有分隔电极的第一电极层和第二电极层;以及液晶元件，其在施加电场时提供具有相变的光束; 用于接收通过液晶单元的反射光束以产生检测信号的检测器; 用于产生施加到分电极的电压的电压发生器; 以及控制器，用于通过参考施加的参考电压将预定的分割电极的施加电压改变到每个分割电极来执行像差补偿控制。 当施加到分割电极的电压改变时，控制器基于检测信号的幅度变化来确定所施加的参考电压。

公开(公告)号：US06218655B1

公开(公告)日：2001-04-17

申请号：US09271624

申请日：1999-03-17

申请人： Masakazu Ogasawara ,  Sakashi Ohtaki ,  Kiyoshi Tateishi

发明人： Masakazu Ogasawara ,  Sakashi Ohtaki ,  Kiyoshi Tateishi

IPC分类号： G02B2740

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

摘要： An optical pickup for irradiating a light beam onto an information recording medium and receiving a light reflected by the medium, includes a light source for emitting a light beam, and a liquid crystal panel for diffracting the light beam to produce a main beam and a plurality of sub-beams to be irradiated on the medium. The liquid crystal panel included a first area in which a first group of grating patterns with predetermined pitches is formed and a second area in which a second group of grating patterns having the predetermined pitches is formed, and the first group of grating patterns and the second group of grating patterns are arranged on a plane with a gap area formed between the first area and the second area so as to form an integrated grating pattern. The optical pickup further includes a control unit for applying a first voltage to the first area to control a refractive index of the first area and applying a second voltage to the second area to control a refractive index of the second area, thereby to control a diffraction characteristic of the integrated grating pattern.

摘要翻译： 用于将光束照射到信息记录介质上并接收由介质反射的光的光学拾取器包括用于发射光束的光源和用于衍射光束以产生主光束的多个液晶面板和多个 的子光束照射在介质上。 液晶面板包括其中形成具有预定间距的第一组光栅图案的第一区域和形成具有预定间距的第二组光栅图案的第二区域，并且第一组光栅图案和第二组光栅图案 光栅图案组布置在平面上，在第一区域和第二区域之间形成有间隙区域，以形成集成的光栅图案。 光拾取器还包括控制单元，用于向第一区域施加第一电压以控制第一区域的折射率并向第二区域施加第二电压以控制第二区域的折射率，由此控制衍射 集成光栅图案的特点。

公开(公告)号：US08189252B2

公开(公告)日：2012-05-29

申请号：US12443612

申请日：2006-11-01

申请人： Makoto Sato ,  Masakazu Ogasawara

发明人： Makoto Sato ,  Masakazu Ogasawara

IPC分类号： G02B26/08

CPC分类号： G02B26/08 ,  G03H1/265 ,  G03H1/28 ,  G11B7/0065 ,  G11B7/00772 ,  G11B7/08564 ,  G11B7/133 ,  G11B7/1369

摘要： A light deflecting device is a light deflecting device for deflecting an incident light beam and has: a coarse motion light deflecting device which has an optical system having at least two conjugate points on an optical axis and deflects the light beam which has passed through one conjugate point and has entered the optical system as an output light beam which passes through the other conjugate point and has a deflection angle with respect to the optical axis while changing its transmitting direction; and a fine motion light deflecting device which is arranged in the optical system, applies a deflection to the incident light beam, and changes the deflection angle of the output light beam to a second deflection angle different from the deflection angle for a predetermined time.

摘要翻译： 光偏转装置是用于偏转入射光束的光偏转装置，具有：一个粗略的光偏转装置，它具有光学系统，该光学系统在光轴上具有至少两个共轭点，并偏转已经穿过一个共轭的光束 并且已经进入光学系统作为输出光束，其通过另一共轭点并且在改变其传输方向的同时具有相对于光轴的偏转角; 以及布置在所述光学系统中的微动光偏转装置，对入射光束施加偏转，并将输出光束的偏转角度改变为与偏转角不同的第二偏转角度达预定时间。

公开(公告)号：US20100309759A1

公开(公告)日：2010-12-09

申请号：US12679235

申请日：2007-09-20

申请人： Makoto Sato ,  Masakazu Ogasawara

发明人： Makoto Sato ,  Masakazu Ogasawara

IPC分类号： G11B7/00

CPC分类号： G11B7/14 ,  G11B2007/0013

摘要： A recording and reproducing method for recording and/or reproducing information from a record carrier that comprises a plurality of recording layers layered in its film thickness direction and a guide layer having a plurality of tracks carrying tracking servo information, wherein a record mark is formed on each recording layer of the record carrier. The method comprises: a focusing step of converging a servo light beam onto the guide layer as well as selectively converging a main light beam group onto one of the recording layers through a common objective lens, wherein the main light beam group comprises a plurality of main light beams neighboring each other; a tracking step of performing a positioning control of the objective lens so that the servo light beam is tracking on one of the tracks; and a recording and/or reproducing step of performing recording and/or reproducing information with the main light beam group while performing the focusing step and the tracking step. When the servo light beam traces on one of the tracks neighboring each other, one trace group is composed of the main light beam group on the one of the recording layers, wherein, when the servo light beam traces on the other of the tracks neighboring each other, the other trace group is composed of the main light beam group on the one of the recording layers, wherein an interval between the one trace group and the other trace group is larger than an average trace pitch within the trace group.

摘要翻译： 一种用于记录和/或再现来自记录载体的信息的记录和/或再现方法，所述记录载体包括在其膜厚度方向上分层的多个记录层，以及引导层，其具有承载跟踪伺服信息的多个轨迹，其中，记录标记形成在 记录载体的每个记录层。 该方法包括：聚焦步骤，将伺服光束会聚到引导层上，以及通过公共物镜选择性地将主光束组会聚到一个记录层上，其中主光束组包括多个主光束 光束彼此相邻; 跟踪步骤，执行所述物镜的定位控制，使得所述伺服光束在所述轨道之一上进行跟踪; 以及在执行聚焦步骤和跟踪步骤的同时，利用主光束组执行记录和/或再现信息的记录和/或再现步骤。 当伺服光束在彼此相邻的轨道之间轨迹时，一个迹线组由记录层之一上的主光束组组成，其中当伺服光束沿着与每个记录层相邻的轨道中的另一个轨迹 另一方面，其他跟踪组由记录层之一上的主光束组构成，其中一个跟踪组与另一个跟踪组之间的间隔大于跟踪组内的平均迹线间距。

公开(公告)号：US20100027086A1

公开(公告)日：2010-02-04

申请号：US12443612

申请日：2006-11-01

申请人： Makoto Sato ,  Masakazu Ogasawara

发明人： Makoto Sato ,  Masakazu Ogasawara

IPC分类号： G02B26/08 ,  G03H1/26

CPC分类号： G02B26/08 ,  G03H1/265 ,  G03H1/28 ,  G11B7/0065 ,  G11B7/00772 ,  G11B7/08564 ,  G11B7/133 ,  G11B7/1369

摘要： A light deflecting device is a light deflecting device for deflecting an incident light beam and has: a coarse motion light deflecting device which has an optical system having at least two conjugate points on an optical axis and deflects the light beam which has passed through one conjugate point and has entered the optical system as an output light beam which passes through the other conjugate point and has a deflection angle with respect to the optical axis while changing its transmitting direction; and a fine motion light deflecting device which is arranged in the optical system, applies a deflection to the incident light beam, and changes the deflection angle of the output light beam to a second deflection angle different from the deflection angle for a predetermined time.

摘要翻译： 光偏转装置是用于偏转入射光束的光偏转装置，具有：一个粗略的光偏转装置，它具有光学系统，该光学系统在光轴上具有至少两个共轭点，并偏转已经穿过一个共轭的光束 并且已经进入光学系统作为输出光束，其通过另一共轭点并且在改变其传输方向的同时具有相对于光轴的偏转角; 以及布置在所述光学系统中的微动光偏转装置，对入射光束施加偏转，并将输出光束的偏转角度改变为与偏转角不同的第二偏转角度达预定时间。

公开(公告)号：US20090245069A1

公开(公告)日：2009-10-01

申请号：US12441731

申请日：2007-03-19

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G11B7/135

CPC分类号： G11B7/252 ,  G11B7/24033 ,  G11B7/24038 ,  G11B7/24062 ,  G11B2007/0009

摘要： Disclosed herein is a recording medium on or from which the recording or reproduction of data is stably performed. On the recording medium, data are recorded three-dimensionally by the irradiation of a recording laser beam. The recording medium includes a reflection control layer including a plurality of reflection layers stacked in a film thickness direction, each reflection layer having a connection terminal, each reflection layer exhibiting reflectivity and transmissivity changeable in response to an electrical signal supplied to the connection terminal and a recording layer disposed at a beam incidence side of the reflection control layer.

摘要翻译： 这里公开了一种记录媒体，其中数据的记录或再现被稳定地执行。 在记录介质上，通过记录激光束的照射三维地记录数据。 记录介质包括反射控制层，反射控制层包括沿膜厚度方向堆叠的多个反射层，每个反射层具有连接端子，每个反射层具有响应于提供给连接端子的电信号而变化的反射率和透射率， 记录层，设置在反射控制层的光束入射侧。

公开(公告)号：US07453787B2

公开(公告)日：2008-11-18

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：US20080279061A1

公开(公告)日：2008-11-13

申请号：US11886078

申请日：2006-03-13

申请人： Masakazu Ogasawara ,  Makoto Sato

发明人： Masakazu Ogasawara ,  Makoto Sato

IPC分类号： G03H1/26 ,  G11B7/135 ,  G11B7/0065

CPC分类号： G11B7/1374 ,  G03H1/04 ,  G03H1/0402 ,  G03H1/0465 ,  G03H2001/0415 ,  G03H2001/0417 ,  G03H2001/0419 ,  G03H2210/22 ,  G11B7/0065 ,  G11B7/139 ,  G11C13/042

摘要： A hologram recording method is a method of recording a hologram, on a hologram recording apparatus that records information by forming a diffraction grating through oppositely irradiating the signal beam and the reference beam to the hologram record carrier. The hologram recording method includes a step of focusing the reference beam at a first numerical aperture from a first effective diameter by means of the reference-beam objective lens, a step of separating the reference beam in a part on the optical axis and a neighborhood thereof to thereby produce from the reference beam a recording reference beam to passes through the hologram record carrier at a second numerical aperture smaller than the first numerical aperture from a second effective diameter smaller than the first effective diameter by means of the reference-beam objective lens of the reference-beam optical system, and allowing the recording reference beam to exit coaxially to the reference beam, and a step of not allowing only the recording reference beam to exit toward the hologram record carrier by means of the signal-beam optical system.

摘要翻译： 全息记录方法是在全息图记录装置上记录全息图的方法，该全息图记录装置通过将信号光束和参考光束相对照射到全息图记录载体上形成衍射光栅来记录信息。 全息记录方法包括通过参考光束物镜将参考光束从第一有效直径聚焦在第一数值孔径的步骤，将参考光束在光轴上的部分及其附近分离的步骤 从而从所述参考光束产生记录参考光束，以通过小于所述第一数值孔径的第二数值孔径从小于所述第一有效直径的第二有效直径通过所述全息图记录载体借助于所述参考光束物镜 参考光束光学系统，并且允许记录参考光束与参考光束同轴地退出，以及不允许仅记录参考光束通过信号束光学系统朝向全息图记录载体排出的步骤。

公开(公告)号：US07428207B2

公开(公告)日：2008-09-23

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： G11B7/00

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。

公开(公告)号：US07428193B2

公开(公告)日：2008-09-23

申请号：US10960926

申请日：2004-10-12

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/13925

摘要： A control mechanism includes a medium wavefront aberration correction voltage generating unit and an optical system wavefront aberration correction voltage generating unit therein, and has a mechanism that independently corrects a medium wavefront aberration caused by a shape or the like of an optical recording medium and an optical system wavefront aberration caused by an optical system in an optical pickup mechanism. Further, it includes a liquid crystal panel as an aberration correcting unit, and is designed to apply voltages corresponding to corrections of the medium wavefront aberration and the optical system wavefront aberration to two transparent electrodes provided in the liquid crystal panel.

摘要翻译： 控制机构包括中波前像差校正电压产生单元和光学系统波阵面像差校正电压产生单元，并且具有独立地校正由光记录介质的形状等引起的介质波前像差和光学 由光学拾取机构中的光学系统引起的系统波前像差。 此外，它包括作为像差校正单元的液晶面板，并且被设计为将对应于中波前像差和光学系统波前像差的校正的电压施加到设置在液晶面板中的两个透明电极。