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1.发明授权Optical disc recording or playback device with corrected focus optical scanning 失效光盘记录或回放装置，具有校正的聚焦光学扫描
公开(公告)号：US5953304A
公开(公告)日：1999-09-14
申请号：US919937
申请日：1997-08-28
申请人： Lieu Kim Dang , Christian Buechler
发明人： Lieu Kim Dang , Christian Buechler
CPC分类号： G11B7/1353 , G11B7/0912 , G11B7/131
摘要： A device for corrected-focus scanning of information while recording on and/or replaying information from a recording medium is based on a radiation source which provides a scanning beam, a focusing objective lens and a radiation-sensitive detector system. A diffraction element for deriving a focus error signal is arranged in the space between the focusing objective lens and the detector system, at a predetermined, fixed distance, the diffraction element being designed such that two focus planes result which are physically separated from one another. The detector system is located between the separate focus planes such that the size ratios, which change in the event of defocusing, of the symmetrically imaged focus spot can be used to derive the focus error signal.
摘要翻译： 用于在从记录介质上记录和/或重放信息时对信息进行校正聚焦扫描的装置基于提供扫描光束的辐射源，聚焦物镜和辐射敏感检测器系统。 用于导出聚焦误差信号的衍射元件以预定的固定距离布置在聚焦物镜和检测器系统之间的空间中，衍射元件被设计成使得彼此物理分离的两个聚焦平面。 检测器系统位于分离的聚焦平面之间，使得可以使用对称成像的聚焦点的散焦情况下改变的尺寸比来导出聚焦误差信号。
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公开(公告)号：US06574183B2
公开(公告)日：2003-06-03
申请号：US10108744
申请日：2002-03-28
IPC分类号： G11B700
CPC分类号： G11B7/1381 , G11B7/0909 , G11B7/094 , G11B7/1353 , G11B7/1356
摘要： The present invention relates to a device for reading from or writing to optical recording media, which device has a scanning beam generation means, a focusing means and a photodetector comprising at least two detector zones and serving to receive zeroth- and first-order diffraction beams from the recording medium. The object of the invention is to obtain a reduction in interfering influences in a signal derived from signals of the photodetector, a signal such as, for example, a focus error signal or a track error signal. This object is achieved by virtue of the fact that a beam splitting means is provided, which splits a light spot falling onto the photodetector into two separate partial spots. The device is, for example, a CD or DVD player, but in particular a recording and reproduction device for so-called DVD-RAMs or similar optical recording media.
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3.发明授权Device for writing and/or reading optical recording medium of various designs 失效用于写入和/或读取各种设计的光学记录介质的装置公开(公告)号：US06285641B1
公开(公告)日：2001-09-04
申请号：US09142268
申请日：1998-09-03
IPC分类号： G11B700
CPC分类号： G11B19/12 , G11B7/08511 , G11B7/0945 , G11B7/1374 , G11B7/13922 , G11B19/00 , G11B2007/0006 , G11B2007/0013 , G11B2019/121
摘要： A device for writing to and/or reading from optical recording media having different structures is described, for example, a device which is suitable both for writing to/reading from digital videodisks (DVD) and conventional CD's. Provision is made for measuring the intensity of each peak in the mirror signal while the objective lens is moving to the recording medium. The intensity e.g. at the instant of the positive-negative crossing of the focus error signal is taken in this case. The type of optical recording medium is determined from the time characteristic and/or the height distribution of the peaks. In order to identify the type of optical recording medium, different properties of the optical recording medium are taken into account, such as reflectivity of the corresponding reflective surface, reduced intensity modulation due to spherical aberration, time characteristic and the like.
摘要翻译： 描述了用于写入和/或从具有不同结构的光学记录介质读取的装置，例如适用于从数字视频盘（DVD）和常规CD写入/读取的装置。 提供测量物镜移动到记录介质时镜像信号中每个峰值的强度。 强度例如 在这种情况下采用聚焦误差信号的正负交叉的时刻。 根据峰值的时间特性和/或高度分布来确定光学记录介质的类型。 为了识别光记录介质的类型，考虑了光记录介质的不同性质，例如相应的反射表面的反射率，由球面像差引起的强度调制减小，时间特性等。
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4.发明授权公开(公告)号：US06788637B1
公开(公告)日：2004-09-07
申请号：US09631236
申请日：2000-08-02
申请人： Lieu Kim Dang , Fang Lei
发明人： Lieu Kim Dang , Fang Lei
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/0903 , G11B7/131 , G11B7/1356 , G11B7/1374 , G11B7/1381 , G11B7/1398 , G11B7/14
摘要： An apparatus for reading from and/or writing to optical recording media on which data markings are arranged along tracks arranged next to one another. The apparatus according to the present invention comprises a light source, a focusing means and an intensity distribution converter. In the present invention, both the extent of the focus spot of the primary beam is reduced and the disadvantages occurring due to the secondary beams are reduced. In an exemplary embodiment, the intensity distribution converter comprises a filtering strip arranged in the region of the focusing means.
摘要翻译： 一种用于从光学记录介质读取和/或写入数据标记沿着彼此相邻布置的轨道的装置。 根据本发明的装置包括光源，聚焦装置和强度分布转换器。 在本发明中，主光束的聚焦点的范围都减小，并且由于次光束而产生的缺点都减小了。 在示例性实施例中，强度分布转换器包括布置在聚焦装置的区域中的滤光条。
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公开(公告)号：US06430141B1
公开(公告)日：2002-08-06
申请号：US09288390
申请日：1999-04-08
IPC分类号： G11B700
CPC分类号： G11B7/1381 , G11B7/0909 , G11B7/094 , G11B7/1353 , G11B7/1356
摘要： A device for reading from or writing to optical recording media comprising a scanning beam generation means, a focusing means and a photodetector comprising at least two detector zones and serving to receive zeroth- and first-order diffraction beams from the recording medium. The object of the invention is to obtain a reduction in interfering influences in a signal derived from signals of the photodetector, a signal such as, for example, a focus error signal or a track error signal. This object is achieved by virtue of the fact that a beam splitting means is provided, which splits a light spot falling onto the photodetector into two separate partial spots. The device is, for example, a CD or DVD player, but in particular a recording and reproduction device for so-called DVD-RAMs or similar optical recording media.
摘要翻译： 一种用于从光学记录介质读取或写入光学记录介质的设备，包括扫描光束产生装置，聚焦装置和光电检测器，其包括至少两个检测器区域，并用于接收来自记录介质的零级和一级衍射光束。 本发明的目的是获得从光电检测器的信号导出的信号中的干扰影响的减小，诸如聚焦误差信号或轨道误差信号的信号。 该目的通过以下事实实现：提供分束装置，其将落在光电检测器上的光斑分成两个分开的局部光斑。 该设备例如是CD或DVD播放器，但是特别是用于所谓的DVD-RAM或类似光学记录介质的记录和再现设备。
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6.发明授权Holographic element diffracting a reflected light beam onto a single light spot of a detector 失效全息元件将反射光束衍射到检测器的单个光斑上
公开(公告)号：US5777976A
公开(公告)日：1998-07-07
申请号：US662626
申请日：1996-06-13
申请人： Lieu Kim Dang
发明人： Lieu Kim Dang
CPC分类号： G11B7/1353 , G11B7/1372 , G11B7/1381
摘要： An optical scanning device having a holographic optical element for receiving a scanning beam which has been influenced by a recording medium. One aspect of the invention is to use an optical spatial filter to obtain the information signals. A further aspect is to image the entire area of the scanning spot on only one detector and to use the complete light component, as a result of which the power component is increased and the requirements for adjustment of a plurality of elements with respect to one another are reduced.
摘要翻译： 一种光学扫描装置，具有用于接受受记录介质影响的扫描光束的全息光学元件。 本发明的一个方面是使用光学空间滤波器来获得信息信号。 另一方面是在仅一个检测器上对扫描点的整个区域进行成像，并且使用完整的光分量，结果是功率分量增加，并且对多个元件相对于彼此进行调整的要求 减少了
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7.发明授权Apparatus for reading from or writing to optical recording media having a tilting-compensation device 失效用于从具有倾斜补偿装置的光学记录介质读取或写入的装置公开(公告)号：US06678222B1
公开(公告)日：2004-01-13
申请号：US09560880
申请日：2000-04-26
申请人： Heinz-Jörg Schröder , Lieu Kim Dang
发明人： Heinz-Jörg Schröder , Lieu Kim Dang
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/0956
摘要： The present invention relates to an apparatus for reading from and/or writing to optical recording media with optical scanner, light source, focusing means, tilting-detection device and tilting-compensation device. The object of the invention is to propose an apparatus and a method, which enables optimum compensation of tilting using as few apparatus functions as possible. This is achieved according to the invention by using a tilting-detection device comprising an optical grating, a detector element, a control device for controlling light source and the focusing means and a control device controlling for the tilting-compensation device.
摘要翻译： 本发明涉及一种用于使用光学扫描仪，光源，聚焦装置，倾斜检测装置和倾斜补偿装置从光学记录介质读取和/或写入光学记录介质的装置。 本发明的目的是提出一种使用尽可能少的装置功能实现最佳的倾斜补偿的装置和方法。 这通过使用包括光栅，检测器元件，用于控制光源的控制装置和聚焦装置的倾斜检测装置以及控制倾斜补偿装置的控制装置来实现。
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8.发明授权公开(公告)号：US06249493B1
公开(公告)日：2001-06-19
申请号：US08946987
申请日：1997-10-08
申请人： Lieu Kim Dang
发明人： Lieu Kim Dang
IPC分类号： G11B700
CPC分类号： G11B7/1381 , G11B7/0909 , G11B7/1365
摘要： The present invention relates to a recording or replay device, and to a method for recognizing a focussing status. The object of the invention is to provide a method of this type and a recording or replay device, with the facility of producing significant astigmatism in the reflected light beam (15) simply and cost-efficiently without elaborate alignment. This object is achieved by the use of a birefringent element (23, 24). The invention is, in particular, suitable for use in a recording or replay device for writing to or playing back optical recording media (11) such as CDs, video discs, DVDs and the like.
摘要翻译： 本发明涉及一种记录或重放装置，以及一种用于识别聚焦状态的方法。 本发明的目的是提供一种这种类型的方法和记录或重放装置，其具有简单且成本有效地在反射光束（15）中产生显着像散的设备，而无需精细对准。 该目的通过使用双折射元件（23,24）来实现。 特别地，本发明适用于用于写入或重放诸如CD，视频光盘，DVD等的光学记录介质（11）的记录或重放装置。
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9.发明授权Device for scanning optical discs using phase detection in a system with significant objective lens movement 失效用于在具有重大物镜运动的系统中使用相位检测扫描光盘的装置
公开(公告)号：US6084835A
公开(公告)日：2000-07-04
申请号：US902179
申请日：1997-07-30
申请人： Christian Buchler , Lieu Kim Dang
发明人： Christian Buchler , Lieu Kim Dang
CPC分类号： G11B7/094 , G11B7/0901
摘要： Tracking error signal in an optical read/write device, such as a CD ROM, are fine tuned for deviations in the positions of the lens structure normal to the recorded medium to provide more precise tracking control. Track error signal is developed by means of DPD-TE circuitry, using for example, signals from a four quadrant photodetector. Selected pairs of the signals from the photodetector are summed and the sums are differenced to develop an intermediate signal. The intermediate signal is amplified with a gain proportional the reciprocal of the intensity of light received by the photodetector, and thereafter combined with the track error signal to provide a corrected track error signal.
摘要翻译： 光学读/写装置（例如CD ROM）中的跟踪误差信号对于与记录介质垂直的透镜结构的位置的偏差进行微调，以提供更精确的跟踪控制。 通过DPD-TE电路开发轨道误差信号，例如使用来自四象限光电检测器的信号。 将来自光电检测器的选定的一对信号求和，并且求和以产生中间信号。 中间信号以与由光电检测器接收的光的强度的倒数成比例的增益放大，然后与轨道误差信号组合以提供校正的轨道误差信号。
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