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公开(公告)号：US20120218872A1
公开(公告)日：2012-08-30
申请号：US13372550
申请日：2012-02-14
IPC分类号： G11B7/1263 , G11B7/09
CPC分类号： G11B7/0908 , G11B7/1263
摘要： An optical disc device includes an optical source for emitting an optical beam, an incident intensity control circuit for controlling an intensity of the optical beam emitted from the optical source, an objective lens for focusing the optical beam on an optical disc, an optical detector for receiving the optical beam reflected from the optical disc, and a servo signal generation circuit for generating a focus error signal from the optical detector, by this configuration, the optical beam is varied once to a third optical beam intensity to be present in between a first optical beam intensity and a second optical beam intensity when varying from the first optical beam intensity up to the second optical beam intensity different from the first optical beam intensity, and the incident intensity control circuit is controlled such that the variation of focus error signal is not exceeded over a predetermined range.
摘要翻译： 光盘装置包括用于发射光束的光源，用于控制从光源发射的光束的强度的入射强度控制电路，用于将光束聚焦在光盘上的物镜，用于 接收从光盘反射的光束，以及用于通过该配置产生聚焦误差信号的伺服信号产生电路，通过该配置，光束被改变一次至第三光束强度，以存在于第一 光束强度和从第一光束强度变化到与第一光束强度不同的第二光束强度时的第二光束强度，并且控制入射强度控制电路，使得聚焦误差信号的变化不是 超过预定范围。
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公开(公告)号：US08537651B2
公开(公告)日：2013-09-17
申请号：US13372550
申请日：2012-02-14
IPC分类号： G11B7/00
CPC分类号： G11B7/0908 , G11B7/1263
摘要： An optical disc device includes an optical source for emitting an optical beam, an incident intensity control circuit for controlling an intensity of the optical beam emitted from the optical source, an objective lens for focusing the optical beam on an optical disc, an optical detector for receiving the optical beam reflected from the optical disc, and a servo signal generation circuit for generating a focus error signal from the optical detector, by this configuration, the optical beam is varied once to a third optical beam intensity to be present in between a first optical beam intensity and a second optical beam intensity when varying from the first optical beam intensity up to the second optical beam intensity different from the first optical beam intensity, and the incident intensity control circuit is controlled such that the variation of focus error signal is not exceeded over a predetermined range.
摘要翻译： 光盘装置包括用于发射光束的光源，用于控制从光源发射的光束的强度的入射强度控制电路，用于将光束聚焦在光盘上的物镜，用于 接收从光盘反射的光束，以及用于通过该配置产生聚焦误差信号的伺服信号产生电路，通过该配置，光束被改变一次至第三光束强度，以存在于第一 光束强度和从第一光束强度变化到与第一光束强度不同的第二光束强度时的第二光束强度，并且控制入射强度控制电路，使得聚焦误差信号的变化不是 超过预定范围。
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公开(公告)号：US20120287765A1
公开(公告)日：2012-11-15
申请号：US13462847
申请日：2012-05-03
IPC分类号： G11B7/09 , G11B7/1374
CPC分类号： G11B7/1353 , G11B7/0901 , G11B7/131 , G11B7/1395
摘要： The present invention provides a unit and method for implementing an optical head and optical drive device whose configuration is simple, and which allows the generation of a track error signal in which no offset is caused to occur. The optical drive device includes a light source for emitting light beams, an objective lens for converging the light beams onto an optical disc, an optical-signal generation element for dividing the light beams into at least four regions by using a division line extending in the radial direction of the optical disc, and a division line extending in the track direction of the optical disc, the light beams being reflected by the optical disc, and an optical detector for receiving the light beams divided by the optical-signal generation element, wherein the up and down or right and left areas of the four regions are made different from each other.
摘要翻译： 本发明提供一种用于实现光头和光驱动装置的单元和方法，其结构简单，并且允许产生不发生偏移的轨道误差信号。 该光驱装置包括用于发射光束的光源，用于将光束会聚在光盘上的物镜，用于将光束分成至少四个区域的光信号发生元件，该光信号产生元件通过使用在 光盘的径向方向，以及沿光盘的轨道方向延伸的分割线，光束被光盘反射，以及光检测器，用于接收由光信号产生元件分割的光束，其中 四个区域的上下左右区域相互不同。
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公开(公告)号：US08593928B2
公开(公告)日：2013-11-26
申请号：US13462847
申请日：2012-05-03
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/0901 , G11B7/131 , G11B7/1395
摘要： The present invention provides a unit and method for implementing an optical head and optical drive device whose configuration is simple, and which allows the generation of a track error signal in which no offset is caused to occur. The optical drive device includes a light source for emitting light beams, an objective lens for converging the light beams onto an optical disc, an optical-signal generation element for dividing the light beams into at least four regions by using a division line extending in the radial direction of the optical disc, and a division line extending in the track direction of the optical disc, the light beams being reflected by the optical disc, and an optical detector for receiving the light beams divided by the optical-signal generation element, wherein the up and down or right and left areas of the four regions are made different from each other.
摘要翻译： 本发明提供一种用于实现光头和光驱动装置的单元和方法，其结构简单，并且允许产生不发生偏移的轨道误差信号。 该光驱装置包括用于发射光束的光源，用于将光束会聚在光盘上的物镜，用于将光束分成至少四个区域的光信号发生元件，该光信号产生元件通过使用在 光盘的径向方向，以及沿光盘的轨道方向延伸的分割线，光束被光盘反射，以及光检测器，用于接收由光信号产生元件分割的光束，其中 四个区域的上下左右区域相互不同。
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公开(公告)号：US08498190B2
公开(公告)日：2013-07-30
申请号：US13396835
申请日：2012-02-15
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/0909 , G11B7/094 , G11B7/131 , G11B7/1395
摘要： An optical head capable of recording or playing back optical discs is provided. The optical disc comprises a light source to emit a beam, an objective to focus the beam on an optical disc, a beam dividing element having a plurality of divided areas with which to divide a cross section of the beam reflected from the optical disc, and a light detector to receive the beams divided by the beam dividing element, wherein the beam dividing element has in at least one of the plurality of areas an aberration imparting function of imparting an astigmatism or defocus aberration to a beam passing through that area.
摘要翻译： 提供了能够记录或重放光盘的光学头。 光盘包括用于发射光束的光源，将光束聚焦在光盘上的目标，具有多个分割区域的光束分割元件，用于分割从光盘反射的光束的横截面，以及 用于接收由所述光束分割元件分割的光束的光检测器，其中所述光束分割元件在所述多个区域中的至少一个区域中具有赋予通过所述区域的光束散光或散焦像差的像差赋予功能。
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6.发明申请METHOD AND APPARATUS FOR GENERATING FOCUS ERROR SIGNAL, OPTICAL HEAD AND OPTICAL DRIVING APPARATUS 审中-公开用于产生焦点错误信号，光学头和光学驱动装置的方法和装置公开(公告)号：US20130015320A1
公开(公告)日：2013-01-17
申请号：US13546075
申请日：2012-07-11
CPC分类号： G11B7/0917 , G11B7/131 , G11B7/1353 , G11B7/1378
摘要： In a method and apparatus for generating a focus error signal, an optical head and an optical driving apparatus are configured such that a light beam is divided into at least two light beams, coma aberration of a predetermined direction is added to one of the divided light beams, and coma aberration of a direction different from the predetermined direction of the coma aberration is added to the other divided light beam to thereby generate the focus error signal.
摘要翻译： 在用于产生聚焦误差信号的方法和装置中，光学头和光学驱动装置被配置为使得光束被分成至少两个光束，预定方向的彗差被加到分割的光线之一 光束和与虹吸像差的预定方向不同的方向的彗形像差被加到另外的分割光束上，从而产生聚焦误差信号。
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公开(公告)号：US20120218874A1
公开(公告)日：2012-08-30
申请号：US13396835
申请日：2012-02-15
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/0909 , G11B7/094 , G11B7/131 , G11B7/1395
摘要： An optical head capable of recording or playing back optical discs is provided. The optical disc comprises a light source to emit a beam, an objective to focus the beam on an optical disc, a beam dividing element having a plurality of divided areas with which to divide a cross section of the beam reflected from the optical disc, and a light detector to receive the beams divided by the beam dividing element, wherein the beam dividing element has in at least one of the plurality of areas an aberration imparting function of imparting an astigmatism or defocus aberration to a beam passing through that area.
摘要翻译： 提供了能够记录或重放光盘的光学头。 光盘包括用于发射光束的光源，将光束聚焦在光盘上的目标，具有多个分割区域的光束分割元件，用于分割从光盘反射的光束的横截面，以及 用于接收由所述光束分割元件分割的光束的光检测器，其中所述光束分割元件在所述多个区域中的至少一个区域中具有赋予通过所述区域的光束散光或散焦像差的像差赋予功能。
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公开(公告)号：US20080049583A1
公开(公告)日：2008-02-28
申请号：US11673676
申请日：2007-02-12
申请人： Tatsuro IDE , Kotaro Oishi
发明人： Tatsuro IDE , Kotaro Oishi
IPC分类号： G11B7/00
CPC分类号： G11B7/0053 , G11B7/1365
摘要： An optical pickup device for resolving problems with deterioration in the RF signal due to crosstalk from the preformatted structures in optical disks which provide address information, especially the Land Pre-Pit signal in optical disks such as DVD-R and DVD-RW disks with a LPP (Land Pre-Pit) structure. When the ratio of electric amplitude (Etan/Erad) of the incident light onto the disk, where Etan and Erad shows the electric amplitude of the foregoing light in the tangential and radial direction of the disk, is set to γ then the optical pickup device is set so that 0.7
摘要翻译： 一种用于解决由于提供地址信息的光盘中的预格式化结构的串扰引起的RF信号劣化的问题的光学拾取装置，特别是诸如DVD-R和DVD-RW盘的光盘中的Land Pre-Pit信号，具有 LPP（Land Pre-Pit）结构。 当Etan和Erad在盘的切向和径向方向上显示上述光的电幅度的盘上的入射光的电幅度（Etan / Erad）的比率被设置为γ时，则光拾取装置 被设定为0.7 <γ（电振幅比）<0.8。
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公开(公告)号：US08374066B2
公开(公告)日：2013-02-12
申请号：US13088454
申请日：2011-04-18
申请人： Kotaro Oishi , Toshiteru Nakamura
发明人： Kotaro Oishi , Toshiteru Nakamura
IPC分类号： G11B7/00
CPC分类号： G11B7/131 , G11B7/0903 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： An optical pickup having a one-plane, two-wavelength diffraction grating and a two-wavelength laser generator is provided in which crosstalk noise caused by leakage of a track error signal into a focus error signal is reduced to improve focus control performance. A main beam and sub-beams generated by the one-plane, two-wavelength diffraction grating and reflected from the surface of an optical disc are incident on corresponding light receiving elements among which the one to receive the main beam and those to receive the sub-beams are relatively shifted in a linear-speed direction of the optical disc. The distance of the shifting is determined based on the characteristic, relative to the relative positions of the light receiving elements, of the leakage of the tracking error signal into the focus error signal detected based on the main beam and sub-beams.
摘要翻译： 提供了具有单平面双波长衍射光栅和双波长激光发生器的光学拾取器，其中由轨道误差信号泄漏引起的串扰噪声降低到聚焦误差信号中，以提高聚焦控制性能。 由单平面双波长衍射光栅产生并从光盘表面反射的主光束和子光束入射到相应的光接收元件，其中接收主光束的光束和接收子光束的光束 光束在光盘的线速度方向上相对移动。 基于相对于光接收元件的相对位置的跟踪误差信号的泄漏到基于主光束和子光束检测到的聚焦误差信号的特性来确定偏移的距离。
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