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1.发明授权Wave-front aberration compensation unit, wave-front aberration compensation device, and optical pickup 失效波前像差补偿单元，波前像差补偿装置和光学拾取器
公开(公告)号：US6078554A
公开(公告)日：2000-06-20
申请号：US848655
申请日：1997-04-29
CPC分类号： G11B7/0956 , G11B7/1369 , G11B7/13927 , G11B2007/0006 , G11B2007/13727 , G11B7/0948
摘要： An LCD panel will rotate based on an external control signal by a prescribed angle such portion of light flux, that enters an objective lens, corresponding to a predetermined incident point and, at the same time, will change by a prescribed length an optical path of this portion of optical flux whose aberrations are in excess of a prescribed standard value. It is thus possible to compensate the wave-front aberrations due to the differences in the effective optical-path length and also to control the effective numerical aperture of the objective lens by utilizing linearly polarized light as the light to be emitted from the laser beam source. It is also possible to compensate the aberrations due the differences in the substrate thickness of the optical recording medium and those due to a tilt of the optical recording medium.
摘要翻译： LCD面板将根据外部控制信号以预定角度旋转对应于预定入射点的进入物镜的光束部分，并且同时将改变预定长度的光路的光路 这部分光通量的像差超过规定的标准值。 因此，可以补偿由于有效光路长度的差异引起的波前像差，并且还可以通过利用线偏振光作为从激光束源发射的光来控制物镜的有效数值孔径 。 也可以补偿光记录介质的基板厚度的差异和由于光记录介质的倾斜导致的像差。
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2.发明授权
公开(公告)号：US6151154A
公开(公告)日：2000-11-21
申请号：US265892
申请日：1999-03-11
IPC分类号： G02F1/1343 , G02F1/139 , G11B7/00 , G11B7/135 , G02F1/01
CPC分类号： G11B7/13925 , G02F1/134309 , G02F1/1393 , G11B7/1369 , G02F2203/18 , G11B2007/0006
摘要： An optical pickup includes: a light source, an object lens, and an aberration correction unit for correcting aberration by giving a phase difference to a light beam. The aberration correction unit corrects astigmatism caused by an optical system of the optical pickup.
摘要翻译： 光学拾取器包括：光源，物镜，以及用于通过给光束赋予相位差来校正像差的像差校正单元。 像差校正单元校正由光学拾取器的光学系统引起的像散。
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3.发明授权Aberration correcting unit, optical pickup apparatus, and recording/reproducing apparatus 失效畸变校正单元，光学拾取装置和记录/再现装置公开(公告)号：US06859429B2
公开(公告)日：2005-02-22
申请号：US09863908
申请日：2001-05-24
CPC分类号： G02F1/13471 , G02F1/29 , G02F2001/291 , G11B7/08511 , G11B7/1369 , G11B7/13925 , G11B2007/0013
摘要： An aberration correcting unit includes: a first element having a liquid crystal sandwiched between first electrode layers, the first element having a first predetermined orientation direction and providing a light with a phase change by applying a voltage; a second element having a liquid crystal sandwiched between the second electrode layers, the second element having a second predetermined orientation direction that is substantially perpendicular to the first orientation direction and providing a light with a phase change by applying a voltage; and a polarization-direction changing element which is arranged between a light source of the light beam and the first and second elements to change a polarization direction of the light beam.
摘要翻译： 像差校正单元包括：具有夹在第一电极层之间的液晶的第一元件，第一元件具有第一预定取向方向，并通过施加电压提供具有相变的光; 具有夹在第二电极层之间的液晶的第二元件，第二元件具有基本上垂直于第一取向方向的第二预定取向方向，并且通过施加电压来提供具有相变的光; 以及偏振方向改变元件，其设置在所述光束的光源与所述第一和第二元件之间，以改变所述光束的偏振方向。
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4.发明授权Optical reproducing aberration compensation system having appropriate correction signals applied to a liquid crystal detector 失效具有施加到液晶检测器的适当校正信号的光学再现像差补偿系统公开(公告)号：US06628589B2
公开(公告)日：2003-09-30
申请号：US09816073
申请日：2001-03-26
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。
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公开(公告)号：US06690500B2
公开(公告)日：2004-02-10
申请号：US09885526
申请日：2001-06-21
IPC分类号： G02F103
CPC分类号： G11B7/1353 , G02F1/134309 , G02F1/1345 , G02F1/29 , G02F2203/18 , G11B7/0948 , G11B7/1369 , G11B2007/13727
摘要： An aberration correction device for correcting aberration produced in a light beam, which includes: a first electrode layer and a second electrode layer being opposed to each other; and a liquid crystal disposed between the first electrode layer and the second electrode layer for producing a change in phase in a light beam passing therethrough in accordance with voltages applied to the first electrode layer and the second electrode layer. The first electrode layer is divided into a plurality of phase adjustment portions which are electrically isolated each other. Each of the plurality of phase adjustment portions includes a pair of electrodes arranged in such a form that produces an electric field distribution for correcting the aberration by applying predetermined voltages thereto.
摘要翻译： 一种用于校正光束产生的像差的像差校正装置，包括：第一电极层和彼此相对的第二电极层; 以及设置在所述第一电极层和所述第二电极层之间的液晶，用于根据施加到所述第一电极层和所述第二电极层的电压，在通过其的光束中产生相位变化。 第一电极层被分成彼此电隔离的多个相位调整部。 多个相位调整部分中的每一个包括一对电极，这些电极通过向其施加预定电压而产生用于校正像差的电场分布。
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6.发明申请Aberration correcting optical unit, optical pickup apparatus, and information recording/reproducing apparatus 审中-公开畸变校正光学单元，光学拾取装置和信息记录/再现装置公开(公告)号：US20050207290A1
公开(公告)日：2005-09-22
申请号：US11120956
申请日：2005-05-04
IPC分类号： G02B27/00 , G02F1/1343 , G11B7/135
CPC分类号： G11B7/13925 , G02B27/0068 , G02F1/134309 , G02F2203/18 , G11B7/1369
摘要： An aberration correcting optical unit includes an optical element for causing a phase change to light passing therethrough by the application of voltage and electrode layers for applying voltages to the optical element. The optical element is sandwiched between the electrode layers. At least one of the electrode layers includes a plurality of electrodes which are electrically isolated from one another. The plurality of electrodes are disposed such that an electric field generated in a portion of the optical element corresponding to a portion between the plurality of electrodes is larger than a predetermined intensity when a predetermined voltage is applied to the optical element.
摘要翻译： 像差校正光学单元包括光学元件，用于通过施加用于向光学元件施加电压的电压和电极层使相对于其中的光变相。 光学元件夹在电极层之间。 电极层中的至少一个包括彼此电隔离的多个电极。 多个电极被布置成使得当对光学元件施加预定电压时，在与多个电极之间的部分相对应的光学元件的一部分中产生的电场大于预定强度。
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7.发明授权Aberration correcting optical unit, optical pickup apparatus and information recording/reproducing apparatus with single and multi-layer electrodes 失效畸变校正光学单元，光学拾取装置和具有单层和多层电极的信息记录/再现装置公开(公告)号：US06909686B2
公开(公告)日：2005-06-21
申请号：US09739452
申请日：2000-12-19
IPC分类号： G02B27/00 , G02F1/1343 , G11B7/135 , G11B7/00
CPC分类号： G11B7/13925 , G02B27/0068 , G02F1/134309 , G02F2203/18 , G11B7/1369
摘要： An aberration correcting optical unit includes an optical element for causing a phase change to light passing therethrough by the application of voltage and electrode layers for applying voltages to the optical element. The optical element is sandwiched between the electrode layers. At least one of the electrode layers includes a plurality of electrodes which are electrically isolated from one another. The plurality of electrodes are disposed such that an electric field generated in a portion of the optical element corresponding to a portion between the plurality of electrodes is larger than a predetermined intensity when a predetermined voltage is applied to the optical element.
摘要翻译： 像差校正光学单元包括光学元件，用于通过施加用于向光学元件施加电压的电压和电极层使相对于其中的光变相。 光学元件夹在电极层之间。 电极层中的至少一个包括彼此电隔离的多个电极。 多个电极被布置成使得当对光学元件施加预定电压时，在与多个电极之间的部分相对应的光学元件的一部分中产生的电场大于预定强度。
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8.发明授权Recording and reproducing method, recording medium, and recording and reproducing apparatus 失效记录和再现方法，记录介质和记录和再现装置公开(公告)号：US07944797B2
公开(公告)日：2011-05-17
申请号：US12294455
申请日：2007-03-14
申请人： Masakazu Ogasawara
发明人： Masakazu Ogasawara
IPC分类号： G11B7/00
CPC分类号： G11B7/00781 , G11B7/0065
摘要： A recording method which optically records two-dimensional data including a positioning mark and data area in a recording medium. In this method, the state of the positioning mark is changed from a first state to at least one second state different from the first state every given number of recording times of such two-dimensional data.
摘要翻译： 一种记录方法，其将包括定位标记和数据区的二维数据光记录在记录介质中。 在该方法中，定位标记的状态从这样的二维数据的每给定数量的记录次数从第一状态改变为与第一状态不同的至少一个第二状态。
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公开(公告)号：US07821899B2
公开(公告)日：2010-10-26
申请号：US11996430
申请日：2006-07-03
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/0903 , G11B7/094 , G11B7/1353
摘要： The present invention provides an optical pickup device requiring no position adjustment of a diffraction grating at the time of assembling the optical pickup device, and capable of suppressing fluctuations in a differential push-pull signal amplitude and cancelling a push-pull offset.An optical pickup device 200 of an embodiment of the present invention has a diffraction grating 230 of a special shape including predetermined grooves and two kinds of lattice grooves arranged at a pitch determined on the basis of a pitch of grooves formed in the surface of an optical disk 50, numerical aperture, wavelength of a light beam, and effective diameter of the light beam applied on the optical disk 50. To suppress push-pull signals generated in the ± first-order diffraction rays, reflection rays from the optical disk 50 of a zeroth-order diffraction ray and ± first-order diffraction rays are detected, and signals corresponding to light reception results are output to a reproduction unit 150, a control unit 130, and an actuator servo circuit 140.
摘要翻译： 本发明提供了一种在组装光学拾取装置时不需要对衍射光栅进行位置调整并且能够抑制差分推挽信号振幅的波动并取消推挽偏移的光学拾取装置。 本发明实施例的光学拾取装置200具有特殊形状的衍射光栅230，该衍射光栅230包括预定的凹槽和两个格栅槽，它们以基于在光学器件表面形成的凹槽的间距所确定的间距 盘50，数值孔径，光束波长和施加在光盘50上的光束的有效直径。为了抑制在±一级衍射光线中产生的推挽信号，来自光盘50的反射光线 检测到零级衍射线和±一级衍射线，并且将对应于光接收结果的信号输出到再现单元150，控制单元130和致动器伺服电路140。
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公开(公告)号：US20100177619A1
公开(公告)日：2010-07-15
申请号：US12376595
申请日：2006-10-04
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。
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