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1.发明授权Photodetector, diffraction grating, optical pickup and optical disc apparatus 有权光电检测器，衍射光栅，光学拾取器和光盘装置公开(公告)号：US07936658B2
公开(公告)日：2011-05-03
申请号：US12709613
申请日：2010-02-22
IPC分类号： G11B7/00
CPC分类号： G11B7/131 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： The present invention provides a photodetector capable of generating highly accurate tracking and focusing error signals free of variations in light quantity caused by interference, in an optical pickup with a two-wavelength multilaser. The photodetector comprises first three light receiving areas arranged linearly to receive three light beams respectively resulting from splitting of a light beam emitted from a laser light source of a first wavelength and second three light receiving areas arranged linearly to receive three light beams respectively resulting from splitting of a light beam emitted from a laser light source of a second wavelength longer than the first wavelength. The distance between both-end light receiving areas out of the first three light receiving areas is longer than the distance between both-end light receiving areas out of the second three light receiving areas.
摘要翻译： 本发明提供了一种能够在具有双波长多光盘的光学拾取器中产生高精度的跟踪和聚焦误差信号的光检测器，该误差信号不受干扰引起的光量的变化。 光电检测器包括前三个光接收区域，线性地布置以接收三个光束，分别由从第一波长的激光光源发射的光束分裂，并且第二三个光线接收区域被线性地分配以接收分别由分裂产生的三个光束 从比第一波长长的第二波长的激光光源发射的光束。 在前三个光接收区域中的两端光接收区域之间的距离比第二三个光接收区域中的两端光接收区域之间的距离长。
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2.发明申请PHOTODETECTOR, DIFFRACTION GRATING, OPTICAL PICKUP AND OPTICAL DISC APPARATUS 有权光电转换器，衍射光栅，光学拾取器和光盘设备公开(公告)号：US20100148045A1
公开(公告)日：2010-06-17
申请号：US12709613
申请日：2010-02-22
IPC分类号： H01L31/0232 , H01L31/09
CPC分类号： G11B7/131 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： The present invention provides a photodetector capable of generating highly accurate tracking and focusing error signals free of variations in light quantity caused by interference, in an optical pickup with a two-wavelength multilaser. The photodetector comprises first three light receiving areas arranged linearly to receive three light beams respectively resulting from splitting of a light beam emitted from a laser light source of a first wavelength and second three light receiving areas arranged linearly to receive three light beams respectively resulting from splitting of a light beam emitted from a laser light source of a second wavelength longer than the first wavelength. The distance between both-end light receiving areas out of the first three light receiving areas is longer than the distance between both-end light receiving areas out of the second three light receiving areas.
摘要翻译： 本发明提供了一种能够在具有双波长多光盘的光学拾取器中产生高精度的跟踪和聚焦误差信号的光检测器，该误差信号不受干扰引起的光量的变化。 光电检测器包括前三个光接收区域，线性地布置以接收三个光束，分别由从第一波长的激光光源发射的光束分裂，并且第二三个光线接收区域被线性地分配以接收分别由分裂产生的三个光束 从比第一波长长的第二波长的激光光源发射的光束。 在前三个光接收区域中的两端光接收区域之间的距离比第二三个光接收区域中的两端光接收区域之间的距离长。
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3.发明申请Photodetector, diffraction grating, optical pickup and optical disc apparatus 有权光电检测器，衍射光栅，光学拾取器和光盘装置公开(公告)号：US20070019530A1
公开(公告)日：2007-01-25
申请号：US11369077
申请日：2006-03-07
IPC分类号： G11B7/00
CPC分类号： G11B7/131 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： The present invention provides a photodetector capable of generating highly accurate tracking and focusing error signals free of variations in light quantity caused by interference, in an optical pickup with a two-wavelength multilaser. The photodetector comprises first three light receiving areas arranged linearly to receive three light beams respectively resulting from splitting of a light beam emitted from a laser light source of a first wavelength and second three light receiving areas arranged linearly to receive three light beams respectively resulting from splitting of a light beam emitted from a laser light source of a second wavelength longer than the first wavelength. The distance between both-end light receiving areas out of the first three light receiving areas is longer than the distance between both-end light receiving areas out of the second three light receiving areas.
摘要翻译： 本发明提供了一种能够在具有双波长多光盘的光学拾取器中产生高精度的跟踪和聚焦误差信号的光检测器，该误差信号不受干扰引起的光量的变化。 光电检测器包括前三个光接收区域，线性地布置以接收三个光束，分别由从第一波长的激光光源发射的光束分裂，并且第二三个光线接收区域被线性地分配以接收分别由分裂产生的三个光束 从比第一波长长的第二波长的激光光源发射的光束。 在前三个光接收区域中的两端光接收区域之间的距离比第二三个光接收区域中的两端光接收区域之间的距离长。
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4.发明授权Photodetector, diffraction grating, optical pickup and optical disc apparatus 有权光电检测器，衍射光栅，光学拾取器和光盘装置公开(公告)号：US07706220B2
公开(公告)日：2010-04-27
申请号：US11369077
申请日：2006-03-07
IPC分类号： G11B7/00
CPC分类号： G11B7/131 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： The present invention provides a photodetector capable of generating highly accurate tracking and focusing error signals free of variations in light quantity caused by interference, in an optical pickup with a two-wavelength multilaser. The photodetector comprises first three light receiving areas arranged linearly to receive three light beams respectively resulting from splitting of a light beam emitted from a laser light source of a first wavelength and second three light receiving areas arranged linearly to receive three light beams respectively resulting from splitting of a light beam emitted from a laser light source of a second wavelength longer than the first wavelength. The distance between both-end light receiving areas out of the first three light receiving areas is longer than the distance between both-end light receiving areas out of the second three light receiving areas.
摘要翻译： 本发明提供了一种能够在具有双波长多光盘的光学拾取器中产生高精度的跟踪和聚焦误差信号的光检测器，该误差信号不受干扰引起的光量的变化。 光电检测器包括前三个光接收区域，线性地布置以接收三个光束，分别由从第一波长的激光光源发射的光束分裂，并且第二三个光线接收区域被线性地分配以接收分别由分裂产生的三个光束 从比第一波长长的第二波长的激光光源发射的光束。 在前三个光接收区域中的两端光接收区域之间的距离比第二三个光接收区域中的两端光接收区域之间的距离长。
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公开(公告)号：US08331207B2
公开(公告)日：2012-12-11
申请号：US12074968
申请日：2008-03-07
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/0903 , G11B7/0912 , G11B7/131 , G11B7/133 , G11B2007/0013
摘要： For use with a multi-layer optical disc, an optical pickup can eliminate a problem of causing a focus error signal and a tracking error signal to fluctuate due to interference of a signal light beam with a return light beam from another recording surface of a multi-layer optical disc during reproduction with an optical pickup that produces a tracking error signal and a focus error signal from a difference signal based on polarized reflected light.
摘要翻译： 为了与多层光盘一起使用，光学拾取器可以消除由于信号光束与来自多个光盘的另一个记录表面的返回光束的干扰而导致聚焦误差信号和跟踪误差信号波动的问题 在利用光学拾取器进行再现期间的光盘，其从基于偏振反射光的差分信号产生跟踪误差信号和聚焦误差信号。
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6.发明申请公开(公告)号：US20060193219A1
公开(公告)日：2006-08-31
申请号：US11334453
申请日：2006-01-19
IPC分类号： G11B7/00
CPC分类号： G11B7/131 , G11B7/08505 , G11B7/0903 , G11B7/1353 , G11B2007/0006
摘要： An optical pickup device is provided which reduces variations in amplitude of a tracking error signal in a seek operation due to an installation error of the optical pickup device onto an optical disk apparatus, thereby generating the tracking error signal with high accuracy without any influence from stray lights, and which is high in productivity and low cost. Two sub-light beams are focused on at least one of forward and backward sides in a rotational direction of the disk with respect to a main light beam focused on the disk. When n is an integer number, and t is a distance between guide grooves of the disk, the two sub-light beams focused are spaced apart from each other by a distance of t×(n+0.5) in the radial direction of the optical disk. As splitting means for splitting the light beams into a plurality of beams, a diffraction grating is used which has grid grooves spaced apart at equal intervals, but having different angles at the upper and lower parts of an exiting surface of the light beam.
摘要翻译： 提供了一种光学拾取装置，其由于光学拾取装置在光盘装置上的安装误差而减少寻道操作中的跟踪误差信号的幅度变化，从而以高精度产生跟踪误差信号，而不受杂散影响 灯具，生产效率高，成本低。 两个子光束相对于聚焦在盘上的主光束在盘的旋转方向上的前后两者中的至少一个上聚焦。 当n是整数时，t是盘的引导槽之间的距离，所聚焦的两个子光束在光盘的径向上彼此间隔开tx（n + 0.5）的距离 。 作为用于将光束分割为多个光束的分离装置，使用衍射光栅，其具有以相等的间隔间隔开的栅格槽，但在光束的出射表面的上部和下部具有不同的角度。
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公开(公告)号：US20080219119A1
公开(公告)日：2008-09-11
申请号：US12074968
申请日：2008-03-07
IPC分类号： G11B5/58
CPC分类号： G11B7/1353 , G11B7/0903 , G11B7/0912 , G11B7/131 , G11B7/133 , G11B2007/0013
摘要： Provided is an optical pickup which can eliminate a problem of causing a focus error signal and a tracking error signal to fluctuate due to interference of a signal light beam with a return light beam from another recording surface of a multi-layer optical disc during reproduction,comprising: a laser source for emitting an optical beam, an objective lens for focusing the light beam onto the multi-layer optical disc, a polarizing grating located at a position through which a reflected light beam from the multi-layer optical disc passes, for branching the reflected beam into at least two light beams, that is, a 0-order light beam and a +1-order light beam having a direction of polarization which is orthogonal to that of the 0-order light beam, an optical detector for receiving the two light beams, a first light receiving zone which is provided in the optical detector, and onto which the 0-order light is irradiated, and a second light receiving zone which is provided in the optical detector and onto which the +1-order light beam is irradiated, wherein the optical detector is capable of delivering a push-pull signal obtained from the first light receiving zone, and a signal obtained by a computation formula similar to the push-pull signal, from the second light receiving zone, and for delivering signals capable of creating a tracking error signal and a focus error signal from a difference signal between the two delivered signals.
摘要翻译： 提供了一种光学拾取器，其可以消除由于在再现期间由于信号光束与来自多层光盘的另一记录表面的返回光束的干涉而导致聚焦误差信号和跟踪误差信号的波动的问题， 包括：用于发射光束的激光源，用于将光束聚焦到多层光盘上的物镜，位于多层光盘反射光束经过的位置的偏振光栅，用于 将反射光束分成至少两个光束，即具有正交于0阶光束的偏振方向的0级光束和+ 1级光束，光检测器 接收两个光束，设置在光学检测器中的第一光接收区，其上照射0次光的第一光接收区和设置在光学检测器中的第二光接收区 并且其上照射了+ 1级光束，其中光学检测器能够传递从第一光接收区获得的推挽信号，以及通过类似于推挽信号的计算公式获得的信号 ，并且用于从两个传送的信号之间的差分信号传送能够产生跟踪误差信号和聚焦误差信号的信号。
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8.发明授权Optical detector, optical pickup and optical information reproducing apparatus using optical pickup for detecting at least three light beams separated from one or more light sources 有权光学检测器，光学拾取器和光学信息再现装置，其使用光学拾取器来检测从一个或多个光源分离的至少三个光束公开(公告)号：US06778475B2
公开(公告)日：2004-08-17
申请号：US10294943
申请日：2002-11-15
IPC分类号： G11B700
CPC分类号： G11B7/131 , G11B7/0903 , G11B7/0909 , G11B7/0943 , G11B2007/0006
摘要： An optical pickup has a semiconductor laser having two laser sources of different wavelengths disposed in the same package, one diffraction grating and one optical detector. A plurality of light reception areas each having four divisional light reception planes of a -character shape are disposed at positions where light beams reflected from an optical disc are applied. A focus error signal is generated by an astigmatism method by using independently these light reception areas and a tracking error signal is generated by a differential phase detection method by using one or both the light reception areas.
摘要翻译： 光拾取器具有设置在相同封装中的两个具有不同波长的激光源的半导体激光器，一个衍射光栅和一个光学检测器。 多个光接收区域，每个具有四个分光接收面的
- 字符形状设置在从光盘反射的光束被施加的位置。 通过独立地使用这些光接收区域通过散光法产生聚焦误差信号，并且通过使用光接收区域中的一个或两个，通过差分相位检测方法生成跟踪误差信号。 -
9.发明授权Optical detector, optical pickup and optical information reproducing apparatus using optical pickup 有权光学检测器，光学拾取器和使用光学拾取器的光学信息再现装置公开(公告)号：US06567355B2
公开(公告)日：2003-05-20
申请号：US09726557
申请日：2000-12-01
IPC分类号： G11B700
CPC分类号： G11B7/131 , G11B7/0903 , G11B7/0909 , G11B7/0943 , G11B2007/0006
摘要： An optical pickup has a semiconductor laser having two laser sources of different wavelengths disposed in the same package, one diffraction grating and one optical detector. A plurality of light reception areas each having four divisional light reception planes of a -character shape are disposed at positions where light beams reflected from an optical disc are applied. A focus error signal is generated by an astigmatism method by using independently these light reception areas and a tracking error signal is generated by a differential phase detection method by using one or both the light reception areas.
摘要翻译： 光拾取器具有设置在相同封装中的两个具有不同波长的激光源的半导体激光器，一个衍射光栅和一个光学检测器。 多个光接收区域，每个光接收区域具有四个分开的光接收面，其具有
- 字符形状设置在从光盘反射的光束被施加的位置。 通过独立地使用这些光接收区域通过散光法产生聚焦误差信号，并且通过使用光接收区域中的一个或两个，通过差分相位检测方法生成跟踪误差信号。 -
10.发明申请公开(公告)号：US20090086611A1
公开(公告)日：2009-04-02
申请号：US12053797
申请日：2008-03-24
申请人： Fumio ISSHIKI , Katsuhiko Izumi
发明人： Fumio ISSHIKI , Katsuhiko Izumi
IPC分类号： G11B7/135
CPC分类号： G11B7/1275 , G11B7/1356 , G11B7/22 , G11B2007/0006 , G11B2007/0013
摘要： Provided are an optical pick up and an optical component used for the optical pickup which are capable of preventing or restraining occurrence of deviation and unbalance which are caused by assembly errors during manufacturing of optical components, a temperature variation or the like. The optical pickup comprises a laser, a polarization changeover element for changing over a direction of polarization of an optical beam emitted from the laser, a beam splitting element for splitting the laser beam into a plurality of optical paths in accordance with a direction of a polarization, a plurality of objective lenses for focusing laser beams onto a recording layer of the optical disc, a rise-up mirror, and a plurality of coupling lenses arranged respectively intermediate of the plurality of optical paths led to the plurality of objective lenses. The rise-up mirror is arranged intermediate of the plurality of optical paths led to the plurality of objective lenses and adapted to be used common to respective optical beams on the plurality of optical paths. The plurality of the coupling lenses are coupled to and held on one and the same drive portion.
摘要翻译： 提供了一种用于光学拾取器的光拾取器和光学部件，其能够防止或限制由光学部件制造期间的组装误差，温度变化等引起的偏差和不平衡的发生。 光拾取器包括激光器，用于切换从激光器发射的光束的偏振方向的偏振转换元件，用于根据偏振方向将激光束分成多个光路的分束元件 用于将激光束聚焦到光盘的记录层上的多个物镜，上升反射镜和分别设置在被引导到多个物镜的多个光路之间的多个耦合透镜。 上升反射镜被布置在被引导到多个物镜的多个光路中间，并且适用于多个光路上的相应光束共同使用。 多个耦合透镜联接并保持在同一个驱动部分上。
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