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21.发明授权Optical head device, inclination detection apparatus using the same, and optical information processing apparatus using the same 有权光头装置，使用该装置的倾斜检测装置以及使用该装置的光信息处理装置公开(公告)号：US06314068B1
公开(公告)日：2001-11-06
申请号：US09640769
申请日：2000-08-17
IPC分类号： G11B700
CPC分类号： G11B7/1381 , G11B7/0943 , G11B7/0953 , G11B7/0956 , G11B7/131
摘要： An inclination detection apparatus is provided which includes an optical system for collecting a beam emitted by a light source onto an information memory medium. The inclination detection apparatus further includes a light detector for generating a detection signal in accordance with a light amount of the beam reflected by the information memory medium, the light detector including a first light receiving section and a second light receiving section. In addition, the inclination detection apparatus includes a signal processing section for processing the detection signal. The signal processing section generates an inclination detection signal based on a difference between a first sum signal and a second sum signal, the first sum signal being based on a sum of a first light receiving section signal and a second light receiving section signal, the second sum signal being based on a sum of a third light receiving section signal and a fourth light receiving section signal. Moreover, the signal processing section generates a tracking error signal based on a difference between a fifth light receiving section signal and a sixth light receiving section signal.
摘要翻译： 提供了一种倾斜检测装置，其包括用于将由光源发射的光束收集到信息存储介质上的光学系统。 倾斜检测装置还包括光检测器，用于根据由信息存储介质反射的光束的光量产生检测信号，光检测器包括第一光接收部分和第二光接收部分。 此外，倾斜检测装置包括用于处理检测信号的信号处理部。 信号处理部分基于第一和信号和第二和信号之间的差产生倾斜检测信号，第一和信号基于第一光接收部分信号和第二光接收部分信号的和，第二和 和信号基于第三光接收部分信号和第四光接收部分信号的和。 此外，信号处理部分基于第五光接收部分信号和第六光接收部分信号之间的差产生跟踪误差信号。
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22.发明授权Optical head including an active polymer film for switching voltage during recording and reproducing processes 有权光头包括用于在记录和再现过程中切换电压的活性聚合物膜公开(公告)号：US07113472B2
公开(公告)日：2006-09-26
申请号：US10096674
申请日：2002-03-12
IPC分类号： G11B7/00
CPC分类号： G11B7/128 , G02F1/061 , G02F2203/07 , G11B7/1369
摘要： An optical head for recording or reproducing a signal with respect to an optical recording medium, which includes an optical element disposed between a light source and an optical recording medium. The optical element has an optically active polymer film in which an optical rotation property changes with respect to an applied voltage, a pair of conductive transparent thin films for applying a voltage to the optically active polymer film, and a transmittance polarization anisotropic part having a different transmittance with respect to a polarization direction, which is disposed on one of the conductive transparent thin films. By changing the applied voltage to the optically active polymer film, a light quantity of a linearly polarized light transmitted through the optical element can be changed substantially instantaneously. Therefore, the power of light reaching the optical recording medium can be switched substantially instantaneously at the time when switched between recording and reproduction.
摘要翻译： 一种用于记录或再现关于光学记录介质的信号的光学头，其包括设置在光源和光学记录介质之间的光学元件。 光学元件具有光学旋转特性相对于施加电压发生变化的光学活性聚合物膜，用于向光学活性聚合物膜施加电压的一对导电透明薄膜和具有不同的透射率偏振各向异性部分 相对于偏振方向的透射率，其设置在导电透明薄膜之一上。 通过将施加的电压改变为光学活性聚合物膜，可以基本上瞬时地改变透过光学元件的线偏振光的光量。 因此，到达光记录介质的光的功率可以在记录和再现之间切换时基本瞬时切换。
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23.发明授权Optical head device, inclination detection apparatus using the same, and optical information processing apparatus using the same 有权光头装置，使用该装置的倾斜检测装置以及使用该装置的光信息处理装置公开(公告)号：US07203138B2
公开(公告)日：2007-04-10
申请号：US10691317
申请日：2003-10-22
IPC分类号： G11B7/00
CPC分类号： G11B7/131 , G11B7/0943 , G11B7/0953 , G11B7/0956 , G11B7/1353 , G11B2007/13727
摘要： An optical head device includes a light source for emitting light; a collection optical system for collecting the light emitted by the light source to an information memory medium including tracks having prescribed grooves; a light detector having a plurality of detection areas for receiving the light reflected by the information memory medium and outputting a signal in accordance with a light amount of the light received; a tracking error signal generator for receiving the signals output from the light detector and generating a tracking error signal based on the signals; and a light division element for dividing a reflected light reflected by the information memory medium. A relationship λ/(NA·Tp)≧1 is satisfied where λ is the wavelength of the light emitted from the light source, NA is the numerical aperture of the collection optical system, and Tp is the distance from a center of the track in the information memory medium to a center of the adjacent track; and the tracking error signal generator generates a tracking error signal from an area except for an overlapping area of the reflected light, the overlapping area being an area of overlapping two circles each having a radius of 1 and having a center of one circle being apart from a center of the reflected light beam at a distance of λ/(NA·2Tp) in a direction orthogonal to the track from a center of a cross-section of the reflected light, when the cross-section of the reflected light on the light division element in a circle having a radius of 1.
摘要翻译： 光头装置包括用于发光的光源; 收集光学系统，用于将由光源发射的光收集到包括具有规定凹槽的轨道的信息存储介质; 具有多个检测区域的光检测器，用于接收由信息存储介质反射的光并根据所接收的光的光量输出信号; 跟踪误差信号发生器，用于接收从光检测器输出的信号并基于该信号产生跟踪误差信号; 以及用于分割由信息存储介质反射的反射光的光分离元件。 满足λ/（NA.Tp）> = 1的关系，其中λ是从光源发射的光的波长，NA是收集光学系统的数值孔径，Tp是从轨道的中心的距离 在信息存储介质中到相邻轨道的中心; 并且跟踪误差信号发生器从除了反射光的重叠区域之外的区域产生跟踪误差信号，重叠区域是具有半径为1并且具有一个圆的中心的两个圆的重叠区域 在反射光的横截面的中心处，在与轨道正交的方向上的距离λ/（NA.2Tp）处的反射光束的中心，当反射光的横截面 半径为1的圆的分割元素。
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24.发明授权Optical head device, inclination detection apparatus using the same, and optical information processing apparatus using the same 有权光头装置，使用该装置的倾斜检测装置以及使用该装置的光信息处理装置公开(公告)号：US06665257B2
公开(公告)日：2003-12-16
申请号：US09761072
申请日：2001-01-15
IPC分类号： G11B700
CPC分类号： G11B7/0943 , G11B7/0953 , G11B7/0956 , G11B7/131 , G11B7/1381
摘要： An optical head device includes a light source for emitting light; a collection optical system for collecting the light emitted by the light source to an information memory medium including at least one of a track having a mark or a space selectively arranged, and a track having a prescribed groove; a light detector having a plurality of detection areas for receiving the light reflected by the information memory medium and outputting a signal in accordance with a light amount of the light received; a division element for dividing the light reflected by the information memory medium and allowing the light to be received by the light detector; a switch element for receiving a first signal and a second signal, which are respectively obtained in accordance with the reflected light incident on a first prescribed area and a second prescribed area of the division element and outputting either one of the first signal or the second signal, the first and second prescribed areas being obtained by dividing the division element along at least one division line; and an information reproduction signal generator for receiving the signal output by the switch element and generating information recorded on the track. The switch element outputs either one of the first signal and the second signal in accordance with a distance and e positional relationship between a light collection point of the light output from the collection light system and the track.
摘要翻译： 光头装置包括用于发光的光源; 收集光学系统，用于将由光源发射的光收集到信息存储介质中，所述信息存储介质包括具有选择性排列的标记或空间的轨道和具有规定槽的轨道中的至少一个; 具有多个检测区域的光检测器，用于接收由信息存储介质反射的光并根据所接收的光的光量输出信号; 分割元件，用于分割由信息存储介质反射的光并允许光被光检测器接收; 用于接收第一信号和第二信号的开关元件，它们分别根据入射在分割元件的第一规定区域和第二规定区域上的反射光获得并输出第一信号或第二信号 所述第一规定区域和所述第二规定区域通过沿着至少一个分割线划分所述分割单元而获得; 以及信息再现信号发生器，用于接收由开关元件输出的信号并产生记录在轨道上的信息。 开关元件根据从收集光系统输出的光的光收集点与轨道之间的距离和e位置关系，输出第一信号和第二信号中的任一个。
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公开(公告)号：US06418095B1
公开(公告)日：2002-07-09
申请号：US08877363
申请日：1997-06-17
IPC分类号： G11B700
CPC分类号： G11B7/1381 , G11B7/0943 , G11B7/0953 , G11B7/0956 , G11B7/131
摘要： An optical head device includes a light source for emitting at least one of a coherent beam and a quasi-monochromatic beam; a collection optical system for collecting the beam to an information memory medium having a track which has at least one mark and at least one space; a light detector having a plurality of detection areas for receiving the beam reflected by the information memory medium and outputting a signal in accordance with a light amount of the beam received; and a tracking error signal generator for receiving the signals output from the light detector and generating a tracking error signal based on the signals. The tracking error signal generator reduces a difference between a first signal amplitude and a second signal amplitude. The first signal amplitude is an absolute value of a difference between first and second signal levels. The second signal amplitude is an absolute value of a difference between the first and third signal levels. The first signal level is a value of the tracking error signal obtained when the beam emitted by the light source is radiated to a center of the track. The second and third signal levels are, respectively, a maximum value and a minimum value of the tracking error signal obtained when the information memory medium is scanned by the beam emitted by the light source in a direction perpendicular to the track.
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26.发明授权Optical head device, inclination detection apparatus using the same, and optical information processing apparatus using the same 有权光头装置，使用该装置的倾斜检测装置以及使用该装置的光信息处理装置公开(公告)号：US06418107B1
公开(公告)日：2002-07-09
申请号：US09641813
申请日：2000-08-17
IPC分类号： G11B700
CPC分类号： G11B7/1381 , G11B7/0943 , G11B7/0953 , G11B7/0956 , G11B7/131
摘要： An optical head device includes a light source for emitting at least one of a coherent beam and a quasi-monochromatic beam; a collection optical system for collecting the beam to an information memory medium having a track which has at least one mark and at least one space; a light detector having a plurality of detection areas for receiving the beam reflected by the information memory medium and outputting a signal in accordance with a light amount of the beam received; and a tracking error signal generator for receiving the signals output from the light detector and generating a tracking error signal based on the signals. The tracking error signal generator reduces a difference between a first signal amplitude and a second signal amplitude. The first signal amplitude is an absolute value of a difference between first and second signal levels. The second signal amplitude is an absolute value of a difference between the first and third signal levels. The first signal level is a value of the tracking error signal obtained when the beam emitted by the light source is radiated to a center of the track. The second and third signal levels are, respectively, a maximum value and a minimum value of the tracking error signal obtained when the information memory medium is scanned by the beam emitted by the light source in a direction perpendicular to the track.
摘要翻译： 光头装置包括用于发射相干光束和准单色光束中的至少一个的光源; 收集光学系统，用于将光束收集到具有至少一个标记和至少一个空间的轨道的信息存储介质; 具有多个检测区域的光检测器，用于接收由信息存储介质反射的光束并根据所接收的光束的光量输出信号; 以及跟踪误差信号发生器，用于接收从光检测器输出的信号，并基于该信号产生跟踪误差信号。 跟踪误差信号发生器减小第一信号幅度和第二信号幅度之间的差。 第一信号幅度是第一和第二信号电平之差的绝对值。 第二信号幅度是第一和第三信号电平之间的差的绝对值。 第一信号电平是当由光源发射的光束被辐射到轨道的中心时获得的跟踪误差信号的值。 第二和第三信号电平分别是当信息存储介质被光源在与光道垂直的方向上发射的光束扫描时获得的跟踪误差信号的最大值和最小值。
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27.发明授权Optical pickup head apparatus capable of suppressing crosstalk from adjacent tracks and in the recording line density direction 失效能够抑制来自相邻轨道和记录线密度方向的串扰的光拾取头装置
公开(公告)号：US5519685A
公开(公告)日：1996-05-21
申请号：US111959
申请日：1993-08-26
CPC分类号： G11B7/1353 , G11B11/10545 , G11B7/0903 , G11B7/125 , G11B7/131 , G11B7/1367
摘要： An optical pickup head apparatus comprises a first coherent light source for emitting a coherent light serving as a main beam, and a second coherent light source for emitting a coherent light having a polarized plane at a right angle to the polarized plane of the coherent light emitted from the first coherent light source. When the coherent light emitted from the second coherent light source is incident upon a phase plate, the phase plate yields a sub-beam presenting a distribution of light intensity having peak values at at least both sides of the center of the sub-beam on a plane vertical with respect to the optical axis of the coherent light. Focusing means overlaps the main beam emitted from the first coherent light source on the sub-beam emitted from the phase plate, causing the resulting overlapped beam to be focused on the information-recorded surface of an optical disk. When a focused beam as reflected from the information-recorded surface of the optical disk is incident upon polarized beam separating means, the polarized beam separating means yields the transmitted beam as divided into the main beam and the sub-beam. Optical detecting means individually detects and supplies the light intensities of the main beam and the sub-beam emitted from the polarized beam separating means.
摘要翻译： 光拾取头装置包括用于发射用作主光束的相干光的第一相干光源和用于发射具有与发射的相干光的偏振平面成直角的偏振面的相干光的第二相干光源 从第一个相干光源。 当从第二相干光源发射的相干光入射到相位板上时，相位板产生一个子光束，该子光束呈现在至少在子光束中心两侧的峰值的光强分布， 相对于相干光的光轴垂直。 聚焦装置与从相位板发射的子光束上的从第一相干光源发射的主光束重叠，导致所产生的重叠光束聚焦在光盘的信息记录表面上。 当从光盘的信息记录表面反射的聚焦光束入射到偏振光束分离装置时，偏振光束分离装置产生被分成主光束和子光束的透射光束。 光检测装置分别检测并提供从偏振光束分离装置发射的主光束和子光束的光强度。
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公开(公告)号：US06400671B2
公开(公告)日：2002-06-04
申请号：US09897811
申请日：2001-07-02
申请人： Hideki Hayashi , Tatsuo Ito , Yoshiaki Komma , Hiroaki Yamamoto , Seiji Nishino
发明人： Hideki Hayashi , Tatsuo Ito , Yoshiaki Komma , Hiroaki Yamamoto , Seiji Nishino
IPC分类号： G11B700
CPC分类号： G11B7/131 , G11B7/0912 , G11B7/0943 , G11B7/133 , G11B7/1353 , G11B2007/0006
摘要： In a photodetector, the minimum size of the photodetection area for detecting a focus error signal from a light beam on the inner radius side of a hologram is made smaller than the minimum diameter of diffracted light beam spots (30, 31) for recording and reproduction, and when a CD is reproduced, a light beam close to the optical axis is made to significantly contribute to the focus error signal and the minimum size of the photodetection area for detecting the focus error signal from a light beam from the peripheral side of the hologram is made larger than the minimum diameter of diffracted light beam spots (130, 131) for recording and reproduction, whereby the focus error signal is made equal to the normal focus error signal when a DVD is reproduced, so that the focus offset variation caused when the base material thickness varies can be reduced.
摘要翻译： 在光电检测器中，将用于检测来自全息图的内半径侧上的光束的聚焦误差信号的光检测区域的最小尺寸设定为小于用于记录和再现的衍射光束点（30,31）的最小直径 ，并且当再现CD时，使靠近光轴的光束显着有助于聚焦误差信号和用于从来自所述光轴的外围侧的光束检测聚焦误差信号的光检测区域的最小尺寸 使全息图大于用于记录和再现的衍射光束点（130,131）的最小直径，由此当再现DVD时使聚焦误差信号等于正常聚焦误差信号，使得聚焦偏移变化引起 当基材厚度变化时可以减少。
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公开(公告)号：US5757754A
公开(公告)日：1998-05-26
申请号：US495137
申请日：1995-06-28
申请人： Hiroaki Yamamoto , Tetsuo Saimi , Seiji Nishino , Yoshiaki Komma , Hidenori Wada
发明人： Hiroaki Yamamoto , Tetsuo Saimi , Seiji Nishino , Yoshiaki Komma , Hidenori Wada
CPC分类号： G11B7/1353 , G11B7/0901 , G11B7/094 , G11B7/123 , G11B7/0912 , G11B7/0916
摘要： A light beam emitted from a semiconductor laser element is collimated by a collimating lens, and is applied to an optical disk through a polarizing holographic beam splitter, a .lambda./4 plate and an objective lens, a light beam reflected by the optical disk is applied to the polarizing holographic beam splitter and is diffracted. Diffracted light beams of +1st order and -1st order are applied to two photodetectors, and a focus error signal is obtained on the basis of the diffracted light beam of +1st order and a tracking error signal is obtained on the basis of the diffracted light beam of -1st order.
摘要翻译： 从半导体激光元件发射的光束被准直透镜准直，并通过偏振全息光束分离器，λ/ 4板和物镜施加到光盘上，施加由光盘反射的光束 到偏振全息分束器并被衍射。 + 1级和-1级的衍射光束被施加到两个光电检测器，并且基于+ 1阶的衍射光束获得聚焦误差信号，并且基于衍射光获得跟踪误差信号 光束为-1阶。
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公开(公告)号：US5748599A
公开(公告)日：1998-05-05
申请号：US785542
申请日：1997-01-17
申请人： Hiroaki Yamamoto , Tetsuo Saimi , Seiji Nishino , Yoshiaki Komma , Hidenori Wada
发明人： Hiroaki Yamamoto , Tetsuo Saimi , Seiji Nishino , Yoshiaki Komma , Hidenori Wada
CPC分类号： G11B7/1353 , G11B7/0901 , G11B7/094 , G11B7/123 , G11B7/0912 , G11B7/0916
摘要： A light beam emitted from a semiconductor laser element is collimated by a collimating lens, and is applied to an optical disk through a polarizing holographic beam splitter, a .lambda./4 plate and an objective lens, a light beam reflected by the optical disk is applied to the polarizing holographic beam splitter and is diffracted. Diffracted light beams of +1st order and -1st order are applied to two photodetectors, and a focus error signal and a tracking error signal are obtained on the basis of the diffracted light beam of +1st order and an information signal is obtained on the basis of the diffracted light beam of -1st order.
摘要翻译： 从半导体激光元件发射的光束被准直透镜准直，并通过偏振全息光束分离器，λ/ 4板和物镜施加到光盘上，施加由光盘反射的光束 到偏振全息分束器并被衍射。 + 1级和1级的衍射光束被施加到两个光电检测器，并且基于+ 1阶的衍射光束获得聚焦误差信号和跟踪误差信号，并且基于 的衍射光束。
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