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公开(公告)号：US07830761B2
公开(公告)日：2010-11-09
申请号：US11908519
申请日：2006-03-20
申请人： Hiroshi Kayama , Hiroaki Matsumiya , Kazuo Momoo
发明人： Hiroshi Kayama , Hiroaki Matsumiya , Kazuo Momoo
IPC分类号： G11B20/00
CPC分类号： G11B7/094 , G11B7/0943 , G11B2007/0013
摘要： An optical disk apparatus according to the present invention includes: a rotation driving section on which an optical disk is to be mounted and which drives the optical disk so as to be rotated; a light source; an objective lens for converging light from the light source onto an optical disk mounted on the rotation driving section; a photodetector having at least two detection sections for detecting reflected light, from the optical disk, of the light; and an error signal generation section for deriving a difference signal and a sum signal of respective outputs from the two detection sections of the photodetector, adjusting an offset in at least the sum signal among the difference signal and the sum signal, and thereafter dividing the difference signal by the sum signal whose offset has been adjusted to generate a position error signal of the objective lens.
摘要翻译： 根据本发明的光盘装置包括：旋转驱动部，其上安装有光盘并驱动光盘以便旋转; 光源; 用于将来自光源的光聚光到安装在旋转驱动部上的光盘上的物镜; 光检测器，具有至少两个用于检测来自光盘的反射光的检测部分; 以及误差信号生成部，用于从光检测器的两个检测部分导出差分信号和各个输出的和信号，调整差分信号和和信号中的至少和信号中的偏移，然后除差 信号通过其偏移量被调整的和信号产生物镜的位置误差信号。
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公开(公告)号：US20090010119A1
公开(公告)日：2009-01-08
申请号：US11908519
申请日：2006-03-20
申请人： Hiroshi Kayama , Hiroaki Matsumiya , Kazuo Momoo
发明人： Hiroshi Kayama , Hiroaki Matsumiya , Kazuo Momoo
CPC分类号： G11B7/094 , G11B7/0943 , G11B2007/0013
摘要： An optical disk apparatus according to the present invention includes: a rotation driving section on which an optical disk is to be mounted and which drives the optical disk so as to be rotated; a light source; an objective lens for converging light from the light source onto an optical disk mounted on the rotation driving section; a photodetector having at least two detection sections for detecting reflected light, from the optical disk, of the light; and an error signal generation section for deriving a difference signal and a sum signal of respective outputs from the two detection sections of the photodetector, adjusting an offset in at least the sum signal among the difference signal and the sum signal, and thereafter dividing the difference signal by the sum signal whose offset has been adjusted to generate a position error signal of the objective lens.
摘要翻译： 根据本发明的光盘装置包括：旋转驱动部，其上安装有光盘并驱动光盘以便旋转; 光源; 用于将来自光源的光聚光到安装在旋转驱动部上的光盘上的物镜; 光检测器，具有至少两个用于检测来自光盘的反射光的检测部分; 以及误差信号生成部，用于从光检测器的两个检测部分导出差分信号和各个输出的和信号，调整差分信号和和信号中的至少和信号中的偏移，然后除差 信号通过其偏移量被调整的和信号产生物镜的位置误差信号。
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公开(公告)号：US08861322B2
公开(公告)日：2014-10-14
申请号：US13600386
申请日：2012-08-31
申请人： Hiroaki Matsumiya , Kazuo Momoo
发明人： Hiroaki Matsumiya , Kazuo Momoo
IPC分类号： G11B7/135 , G11B7/131 , G11B7/14 , G11B7/127 , G11B7/09 , G11B7/0045 , G11B7/1381 , G11B7/00 , G11B7/003
CPC分类号： G11B7/0903 , G11B7/003 , G11B7/00458 , G11B7/127 , G11B7/131 , G11B7/1381 , G11B7/14 , G11B2007/0013
摘要： An exemplary optical pickup comprises: a light source with first and second emission points; an optical branching element which branches light emitted from the first emission point into multiple light beams including a first main beam and first sub-beams and which also branches light emitted from the second emission point into multiple light beams including a second main beam and second sub-beams; an optical system which condenses the multiple light beams produced by the optical branching element onto an optical storage medium, thereby making the first and second main beams form a write light beam spot and a read light beam spot, respectively, on a target recording track on the storage medium and making the first and second sub-beams form reference light beam spots and other light beam spots somewhere on the storage medium other than the target recording track.
摘要翻译： 示例性光学拾取器包括：具有第一和第二发射点的光源; 将从第一发射点发射的光分支成包括第一主光束和第一子光束的多个光束并且还将从第二发射点发射的光分支成包括第二主光束和第二子光束的多个光束的光分支元件 光束 光学系统，其将由光分路器产生的多个光束会聚到光存储介质上，从而使第一和第二主光束分别在目标记录轨道上形成写入光束点和读取光束点， 存储介质并使第一和第二子光束在存储介质上除了目标记录轨道之外的某处形成参考光束点和其他光束点。
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公开(公告)号：US08462596B2
公开(公告)日：2013-06-11
申请号：US13511017
申请日：2010-11-24
IPC分类号： G11B7/00
CPC分类号： G11B7/131 , G11B7/0903 , G11B7/1353 , G11B7/1381 , G11B2007/0013
摘要： When performing recording/reproduction of information for a given recording layer of an optical disc having three recording layers, influences of reflected light from other recording layers are reduced or removed, thus making it possible to obtain a more stable RF signal or focus error signal.An optical pickup device includes a light source, a collimator lens, an objective lens, a photodetector, and a light shielding member. Among the recording layers of the optical disc, a first layer and a second layer adjoining each other are disposed in the order of the first layer and second layer from near the objective lens. The light shielding member is disposed at a position satisfying the condition d>d1 to block a part of reflected light from the second layer when light is converged on the first layer, where d is an optical path length from the photodetector to the light shielding member; and d1 is a distance from the photodetector to a position at which reflected light from the second layer becomes focused between the collimator lens and the photodetector.
摘要翻译： 当对具有三个记录层的光盘的给定记录层执行信息的记录/再现时，减少或去除来自其它记录层的反射光的影响，从而可以获得更稳定的RF信号或聚焦误差信号。 光学拾取装置包括光源，准直透镜，物镜，光电检测器和遮光构件。 在光盘的记录层中，邻接的第一层和第二层以物镜附近的第一层和第二层的顺序设置。 光遮蔽构件设置在满足条件d> d1的位置，以便当光聚焦在第一层上时阻挡来自第二层的反射光的一部分，其中d是从光电检测器到遮光构件的光路长度 ; d1是从光电检测器到第二层的反射光在准直透镜和光电检测器之间聚焦的位置的距离。
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公开(公告)号：US20120257487A1
公开(公告)日：2012-10-11
申请号：US13377946
申请日：2011-04-08
申请人： Hiroaki Matsumiya , Kazuo Momoo
发明人： Hiroaki Matsumiya , Kazuo Momoo
IPC分类号： G11B7/135 , G11B7/1263 , G11B7/127
CPC分类号： G11B7/1263
摘要： An optical disc drive according to the present invention includes: a laser light source 2 for emitting a laser beam; a photodetector 10 for detecting a signal that has been supplied from an optical disc 100; and an optical system 200 for irradiating the optical disc 100 with the laser beam and guiding the light reflected from the optical disc 11 to the photodetector 10. The drive further includes a memory 300 for storing information defining a relation between the output value of the photodetector 10 and the output power of the laser light source 2 when the laser light source 2 is emitting the laser beam but the light reflected from the optical disc 100 fails to reach the photodetector 10; and a control section 400 for controlling the output power of the laser light source 2 based on the information stored in the memory 300 and the output of the photodetector 10 when the laser light source 2 is emitting the laser beam but the light reflected from the optical disc fails to reach the photodetector 10.
摘要翻译： 根据本发明的光盘驱动器包括：用于发射激光束的激光光源2; 用于检测从光盘100提供的信号的光电检测器10; 以及用于用激光束照射光盘100并将从光盘11反射的光引导到光电检测器10的光学系统200.驱动器还包括存储器300，用于存储定义光电检测器的输出值之间的关系的信息 10，激光光源2发射激光时激光光源2的输出功率，但从光盘100反射的光不能到达光检测器10; 以及控制部400，用于根据存储在存储器300中的信息和当激光光源2发射激光而是从光学反射的光时控制光电检测器10的输出，来控制激光光源2的输出功率 光盘未能到达光电检测器10。
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公开(公告)号：US06914870B2
公开(公告)日：2005-07-05
申请号：US10630304
申请日：2003-07-30
申请人： Junichi Asada , Seiji Nishiwaki , Yuichi Takahashi , Kenji Nagashima , Hiroaki Matsumiya , Youichi Saitoh , Kazuo Momoo
发明人： Junichi Asada , Seiji Nishiwaki , Yuichi Takahashi , Kenji Nagashima , Hiroaki Matsumiya , Youichi Saitoh , Kazuo Momoo
CPC分类号： G11B7/1263 , G11B7/1362 , G11B7/1378 , G11B7/1398 , G11B2007/13725
摘要： To implement light quantity monitoring with high frequency responsivity and correction of astigmatic differences of a semiconductor laser with a simple configuration with a fewer parts.Of the light beam output from a semiconductor laser light source 101, a peripheral beam component is entered by a light reflection element 107 into an anterior light monitoring photodetector 103 formed in the vicinity of a semiconductor laser light source 101. Furthermore, the surface of the reflection sphere of the light reflection element is formed anamorphic, and thus condensed to an appropriate size on the photodetector without being focused, providing high frequency responsivity. Furthermore, the light reflection element 107 is placed inclined at a predetermined angle so as to cancel out astigmatic difference of the optical semiconductor laser light source 101. In addition, the photodetector 103 is placed in the direction so that a reflected light 108 is bent by an inclination of the light reflection element 107, reducing the amount of parallel displacement during adjustment of the light reflection element 107.
摘要翻译： 实现具有高频率响应性的光量监测和半导体激光器的散光差异的校正，具有更少部件的简单配置。 在从半导体激光光源101输出的光束中，通过光反射元件107将周边光束分量输入到形成在半导体激光光源101附近的前光监视光电检测器103中。 此外，光反射元件的反射球的表面形成为变形的，并因此在不被聚焦的情况下在光电检测器上聚光到适当的尺寸，从而提供高频响应度。 此外，光反射元件107以预定角度倾斜放置，以抵消光半导体激光源101的像散差。 此外，光电检测器103被放置成使得反射光108被光反射元件107的倾斜弯曲，从而减少了光反射元件107的调节期间的平行移动量。
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公开(公告)号：US20060181996A1
公开(公告)日：2006-08-17
申请号：US10552193
申请日：2004-04-06
申请人： Hiroaki Matsumiya , Seiji Nishiwaki , Kazuo Momoo
发明人： Hiroaki Matsumiya , Seiji Nishiwaki , Kazuo Momoo
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B7/094 , G11B7/0943
摘要： An optical disk apparatus according to the present invention includes: a motor for rotating an optical disk; a light source; diffraction means for diffracting a portion of light emitted from the light source to form a main beam of 0th order light and a pair of sub beams composed of +1st order light and −1st order light which are formed on both sides of the 0th order light; an objective lens for converging the main beam and the pair of sub beams onto the optical disk; a light receiving means for receiving the main beam and the sub beams reflected from the optical disk, and outputting electrical signals through photoelectric conversion; and a calculation section for, based on the electrical signals output from the light receiving means, providing a main push-pull signal MPP, a sub push-pull signal SPP, and a differential signal between the main push-pull signal MPP and the sub push-pull signal SPP. A phase difference detection means for detecting a phase difference between the main push-pull signal MPP and the differential signal is further included, and in accordance with an output from the phase difference detection means, an offset is applied in a tracking control of the main beam with respect to the optical disk to compensate for an off-tracking caused by a phase shift of the differential signal.
摘要翻译： 根据本发明的光盘装置包括：用于旋转光盘的电动机; 光源; 衍射装置，用于衍射从光源发射的光的一部分以形成第0级次级光的主光束和由+1级次级光组成的一对子光束 和第<！ - SIPO
- >次级光，其形成在第0级次光的两侧; 用于将所述主光束和所述一对子光束会聚到所述光盘上的物镜; 光接收装置，用于接收从光盘反射的主光束和子光束，并通过光电转换输出电信号; 以及计算部分，用于基于从光接收装置输出的电信号，提供主推挽信号MPP，副推挽信号SPP和主推挽信号MPP与子信号之间的差分信号 推挽信号SPP。 还包括用于检测主推挽信号MPP和差分信号之间的相位差的相位差检测装置，并且根据相位差检测装置的输出，在主要的跟踪控制中应用偏移 相对于光盘的光束来补偿由差分信号的相移导致的偏离跟踪。 -
公开(公告)号：US20120287766A1
公开(公告)日：2012-11-15
申请号：US13511017
申请日：2010-11-24
CPC分类号： G11B7/131 , G11B7/0903 , G11B7/1353 , G11B7/1381 , G11B2007/0013
摘要： When performing recording/reproduction of information for a given recording layer of an optical disc having three recording layers, influences of reflected light from other recording layers are reduced or removed, thus making it possible to obtain a more stable RF signal or focus error signal.An optical pickup device includes a light source, a collimator lens, an objective lens, a photodetector, and a light shielding member. Among the recording layers of the optical disc, a first layer and a second layer adjoining each other are disposed in the order of the first layer and second layer from near the objective lens. The light shielding member is disposed at a position satisfying the condition d>d1 to block a part of reflected light from the second layer when light is converged on the first layer, where d is an optical path length from the photodetector to the light shielding member; and d1 is a distance from the photodetector to a position at which reflected light from the second layer becomes focused between the collimator lens and the photodetector.
摘要翻译： 当对具有三个记录层的光盘的给定记录层执行信息的记录/再现时，减少或去除来自其它记录层的反射光的影响，从而可以获得更稳定的RF信号或聚焦误差信号。 光学拾取装置包括光源，准直透镜，物镜，光电检测器和遮光构件。 在光盘的记录层中，邻接的第一层和第二层以物镜附近的第一层和第二层的顺序设置。 光遮蔽构件设置在满足条件d> d1的位置，以便当光聚焦在第一层上时阻挡来自第二层的反射光的一部分，其中d是从光电检测器到遮光构件的光路长度 ; d1是从光电检测器到第二层的反射光在准直透镜和光电检测器之间聚焦的位置的距离。
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公开(公告)号：US20120117580A1
公开(公告)日：2012-05-10
申请号：US13100327
申请日：2011-05-04
申请人： Jun-ichi Asada , Hiroaki Matsumiya , Kazuo Momoo
发明人： Jun-ichi Asada , Hiroaki Matsumiya , Kazuo Momoo
CPC分类号： G11B7/1353 , G11B7/0903 , G11B7/131 , G11B7/1374 , G11B7/1395 , G11B2007/0006
摘要： According to the present invention, a tracking error signal can be obtained with good stability by the three-beam differential push-pull method even if the track guide groove direction of the optical disc changes as viewed from the objective lens.An optical pickup 30 according to the present invention includes: a grating element 110 for splitting light emitted from a light source 121 into multiple light beams including zero-order, −first-order and +first-order diffracted light beams; an objective lens 118 for condensing the zero-order and ±first-order diffracted light beams, which have come from the grating element 110, onto an optical disc; and a photosensor 101 with multiple photodetectors for receiving respectively the three diffracted light beams reflected from the optical disc. The grating element 110 is designed so that when measured perpendicularly to tracks on the disc, sub-light beam spots formed on the disc by the ±first-order diffracted light beams are larger than a main light beam spot formed on the disc by the zero-order diffracted light beam.
摘要翻译： 根据本发明，即使从物镜观察光盘的轨道引导槽方向变化，也可以通过三光束差分推挽法获得具有良好稳定性的跟踪误差信号。 根据本发明的光拾取器30包括：光栅元件110，用于将从光源121发射的光分成包括零级，一级和+一级衍射光束的多个光束; 用于将来自光栅元件110的零级和±一级衍射光束聚光到光盘上的物镜118; 以及具有多个光电检测器的光传感器101，用于分别接收从光盘反射的三个衍射光束。 光栅元件110被设计成使得当垂直于盘上的轨道测量时，通过±一级衍射光束在盘上形成的子光束点大于通过零点形成在盘上的主光束点 级衍射光束。
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公开(公告)号：US07929399B2
公开(公告)日：2011-04-19
申请号：US12334698
申请日：2008-12-15
申请人： Hiroaki Matsumiya , Kazuo Momoo
发明人： Hiroaki Matsumiya , Kazuo Momoo
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/0903 , G11B7/0909 , G11B2007/0013
摘要： When recording on and/or reproducing from an information recording medium having a plurality of recording layers is performed, there has been a problem in appropriately detecting a control signal at the time of the recording and/or reproducing, since reflected light from a recording layer, which does not undergo the recording and/or reproducing, enters a photodetector concurrently with reflected light from a recording layer which undergoes the recording and/or reproducing. In the present invention, a polarization hologram is used to diffract light outputted from a light source and to generate a main beam, which is a zeroth-order light beam, and a pair of sub beams, which is a positive first-order light beam and a negative first-order light beam each having a polarization direction perpendicular to a polarization direction of the main beam. Accordingly, it is possible to prevent the reflected sub beams from a recording layer, which is a target undergoing recording and/or reproducing, from interfering with the reflected main beam from a recording layer, which is a non-target not undergoing the recording and/or reproducing. Therefore, it is possible to obtain an accurate control signal based on the sub beams, and also possible to realize an optical pickup device having a preferable recording performance.
摘要翻译： 当从具有多个记录层的信息记录介质进行记录和/或再现时，由于来自记录层的反射光，在记录和/或再现时适当检测控制信号存在问题， 不经历记录和/或再现的记录和/或再现的记录和/或再现的记录层的反射光同时进入光电检测器。 在本发明中，使用偏振全息图来衍射从光源输出的光并产生作为零级光束的主光束和作为正一级光束的一对子光束 以及各自具有与主光束的偏振方向垂直的偏振方向的负一级光束。 因此，可以防止作为正在进行记录和/或再现的目标的记录层的反射子光束来自不是未进行记录的非目标的记录层的反射主光束， /或再现。 因此，可以获得基于子光束的精确的控制信号，并且还可以实现具有优选的记录性能的光学拾取装置。
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