公开(公告)号：US11887624B2

公开(公告)日：2024-01-30

申请号：US17733221

申请日：2022-04-29

申请人： Huawei Technologies Co., Ltd.

发明人： Jia Xu ,  Jun Xu ,  Peng Lin

IPC分类号： G11B7/09 ,  G11B7/0037

CPC分类号： G11B7/0941 ,  G11B7/0037 ,  G11B7/0938

摘要： A detection apparatus determines whether a recording layer of an optical disc is at a focal point of an objective lens. The detection apparatus includes an objective lens, a beam splitter, a reflector, a detector, and a servo controller. The reflector and the detector are disposed opposite to each other on two sides of an optical axis of the objective lens, and a normal line of the reflector is perpendicular to the optical axis. The beam splitter is disposed between the reflector and the detector and is located on the optical axis. The servo controller is connected to the detector.

公开(公告)号：US20160225400A1

公开(公告)日：2016-08-04

申请号：US14974335

申请日：2015-12-18

申请人： SONY CORPORATION

发明人： Tomoya IKUTA ,  Takeshi KUBO ,  Takashi NAKAO ,  Kimihiro SAITO ,  Kenji YAMAMOTO

IPC分类号： G11B7/1392 ,  G11B7/007 ,  G11B7/09

CPC分类号： G11B7/13927 ,  G11B7/0037 ,  G11B7/00718 ,  G11B7/08511 ,  G11B7/0908 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/1353 ,  G11B7/1378 ,  G11B7/1381 ,  G11B7/1395

摘要： There is provided an optical disc device that performs recording on a land and a groove, including an optical path splitter configured to split a luminous flux returning from an optical disc into first and second optical paths, a first detector configured to receive a whole of the luminous flux that has passed through the first optical path, a second detector configured to receive a luminous flux of an inside part of the luminous flux that has passed through the second optical path, a spherical aberration error signal generation unit configured to generate a spherical aberration error signal on the basis of a difference between a first focus error signal obtained on the basis of a detection signal of the first detector and a second focus error signal obtained on the basis of a detection signal of the second detector, a spherical aberration correction unit, and an adjustment unit.

摘要翻译： 提供了一种光盘装置，其在陆地和凹槽上执行记录，包括光路分路器，其构造成将从光盘返回的光束分成第一和第二光路;第一检测器，被配置为接收整个 已经通过第一光路的光通量，被配置为接收通过第二光路的光通量的内部的光通量的第二检测器，被配置为产生球面像差的球面像差误差信号生成单元 基于第一检测器的检测信号获得的第一聚焦误差信号与基于第二检测器的检测信号获得的第二聚焦误差信号之间的差异的误差信号，球面像差校正单元 ，和调整单元。

公开(公告)号：US20160027463A1

公开(公告)日：2016-01-28

申请号：US14819796

申请日：2015-08-06

申请人： Optical Devices, LLC

发明人： Ron J. Kadlec

IPC分类号： G11B7/09 ,  G11B20/10

CPC分类号： G11B7/0941 ,  G11B7/08505 ,  G11B7/08529 ,  G11B7/08541 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/094 ,  G11B7/0945 ,  G11B20/10046 ,  G11B20/18 ,  G11B27/105 ,  G11B27/3027

摘要： A digital servo method for an optical disk drive includes receiving low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk. Versions of the photodetector signals are digitized to produce digital signals. A focus control signal is determined through at least one servo algorithm in a digital signal processor based on a focus error determined from the digital signals. Alternatively, a tracking control signal is determined through at least one servo algorithm in the digital signal processor based on a tracking error determined from the digital signals. An optical disk drive includes an analog-to-digital converter configured to convert low-pass filtered and gain-adjusted versions of photodetector output signals into at least one digital signal and the digital signal processor.

摘要翻译： 用于光盘驱动器的数字伺服方法包括接收由光盘的照明产生的光电检测器输出信号的低通滤波和增益调整版本。 光电检测器信号的版本被数字化以产生数字信号。 基于从数字信号确定的聚焦误差，通过数字信号处理器中的至少一个伺服算法确定聚焦控制信号。 或者，基于从数字信号确定的跟踪误差，通过数字信号处理器中的至少一个伺服算法来确定跟踪控制信号。 光盘驱动器包括模拟 - 数字转换器，其被配置为将光电检测器输出信号的低通滤波和增益调整版本转换成至少一个数字信号和数字信号处理器。

公开(公告)号：US09196286B2

公开(公告)日：2015-11-24

申请号：US14403248

申请日：2013-05-30

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Kanji Wakabayashi ,  Kousei Sano ,  Yoshiaki Komma

IPC分类号： G11B7/09 ,  G11B7/007 ,  G11B7/095 ,  G11B7/1353 ,  G11B20/10 ,  G11B7/1381

CPC分类号： G11B7/00718 ,  G11B7/005 ,  G11B7/0901 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0956 ,  G11B7/1353 ,  G11B7/1381 ,  G11B20/10027 ,  G11B20/10212 ,  G11B2007/00709

摘要： An optical disk information device includes a laser light source that emits a luminous flux with a wavelength λ, an objective lens having a numerical aperture NA, a splitting element, a photodetector, a central portion amplifier, at least two end portion amplifiers, an adder, a control signal processing section having a tracking switcher that inverts a polarity of a tracking control signal depending on whether a track scanned by a condensing spot corresponds to a land portion or a groove portion, and a gain controller that, when the polarity of the tracking control signal is inverted, switches gains of the central portion amplifier and the end portion amplifiers and sets the gain of the central portion amplifier substantially lower than the gain of at least one of the end portion amplifiers so as to reduce crosstalk from adjacent tracks in the optical disk.

摘要翻译： 光盘信息装置包括发射波长为λ的光束的激光源，具有数值孔径NA的物镜，分割元件，光电检测器，中央部分放大器，至少两个端部放大器，加法器 控制信号处理部分，具有跟踪切换器，其根据由聚光点扫描的光道是否对应于岸台部分或凹槽部分，反转跟踪控制信号的极性;以及增益控制器，当所述跟踪控制信号的极性 跟踪控制信号反转，切换中央部分放大器和端部放大器的增益，并设置中央部分放大器的增益，基本上比端部放大器中的至少一个放大器的增益低，以便减少相邻轨道的串扰 光盘。

公开(公告)号：US09105281B2

公开(公告)日：2015-08-11

申请号：US13854475

申请日：2013-04-01

申请人： Optical Devices, LLC

发明人： Ron J. Kadlec

IPC分类号： G11B21/08 ,  G11B7/09 ,  G11B7/085

CPC分类号： G11B7/0941 ,  G11B7/08505 ,  G11B7/08529 ,  G11B7/08541 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/094 ,  G11B7/0945 ,  G11B20/10046 ,  G11B20/18 ,  G11B27/105 ,  G11B27/3027

摘要： A servo processor for an optical disk drive is provided that includes: an analog-to-digital converter for converting versions of photodetector output signals into digital signals; and a digital signal processor configured to receive the digital signals, the digital signal processor being further configured to determine a focus error signal (FES) and a tracking error signal (TES) from the digital signals, the digital signal processor being further configured to process TES and FES through servo algorithms to produce tracking and focus control signals.

摘要翻译： 提供了一种用于光盘驱动器的伺服处理器，其包括：用于将光电检测器输出信号的形式转换成数字信号的模数转换器; 以及数字信号处理器，被配置为接收所述数字信号，所述数字信号处理器还被配置为从所述数字信号确定聚焦误差信号（FES）和跟踪误差信号（TES），所述数字信号处理器还被配置为处理 TES和FES通过伺服算法产生跟踪和聚焦控制信号。

公开(公告)号：US08937854B2

公开(公告)日：2015-01-20

申请号：US14037482

申请日：2013-09-26

申请人： Optical Devices, LLC

发明人： Ron J. Kadlec

IPC分类号： G11B21/08 ,  G11B7/09 ,  G11B7/085

CPC分类号： G11B7/0941 ,  G11B7/08505 ,  G11B7/08529 ,  G11B7/08541 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/094 ,  G11B7/0945 ,  G11B20/10046 ,  G11B20/18 ,  G11B27/105 ,  G11B27/3027

摘要： A focus servo system for an optical disk drive includes an optical pick-up unit comprising at least one photodetector. At least one analog to digital converter is configured to digitize signals received from the at least one photodetector. At least one processor is configured to execute a digital servo algorithm to process the versions of the digitized signals to calculate a focus error signal (FES) from the versions of the digitized signals and to indicate a focus open condition based on the FES and the versions of the digitized signals.

摘要翻译： 用于光盘驱动器的聚焦伺服系统包括包括至少一个光电检测器的光学拾取单元。 至少一个模/数转换器被配置为数字化从至少一个光电检测器接收的信号。 至少一个处理器被配置为执行数字伺服算法来处理数字化信号的版本以从数字化信号的版本计算聚焦误差信号（FES），并且基于FES和版本来指示焦点打开状态 的数字化信号。

公开(公告)号：US08780680B2

公开(公告)日：2014-07-15

申请号：US13173517

申请日：2011-06-30

申请人： Yoshimi Iso ,  Mitsuo Hagiwara ,  Mitsuyuki Kimura

发明人： Yoshimi Iso ,  Mitsuo Hagiwara ,  Mitsuyuki Kimura

IPC分类号： G11B7/00

CPC分类号： G11B7/0917 ,  G11B7/0037 ,  G11B7/0908 ,  G11B7/0912 ,  G11B7/0941 ,  G11B7/0943 ,  G11B23/40 ,  G11B2007/0016 ,  G11B2007/00727

摘要： The optical disc device has a circuit which forms a focus error signal for focus servo control based on reflection light from an optical disc exposed to laser light. Also, the device has a data processing unit which can control by feedback a position to which an objective lens is moved by a focusing actuator based on a focus error signal. In label printing, the data processing unit controls, by feedforward, a position to which the objective lens is moved by the focusing actuator based on control data for label printing. The operation resolution of the focusing actuator in feedforward control is made higher than that in feedback control. Thus, an intended position control accuracy is achieved in feedforward control. For instance, in feedforward control, the gain of the driver circuit for the focusing actuator is switched to a smaller one in comparison to that in feedback control.

摘要翻译： 光盘装置具有基于来自暴露于激光的光盘的反射光形成用于聚焦伺服控制的聚焦误差信号的电路。 此外，该装置具有数据处理单元，该数据处理单元可以通过反馈控制基于聚焦误差信号的聚焦致动器移动物镜的位置。 在标签打印中，数据处理单元基于用于标签打印的控制数据，通过前馈控制由聚焦致动器移动物镜的位置。 前馈控制中聚焦执行器的运行分辨率高于反馈控制。 因此，在前馈控制中实现了预期的位置控制精度。 例如，在前馈控制中，与反馈控制相比，用于聚焦致动器的驱动电路的增益被切换到较小的一个。

公开(公告)号：US08693295B2

公开(公告)日：2014-04-08

申请号：US12375138

申请日：2007-05-22

申请人： Kenya Nakai ,  Masahisa Shinoda ,  Nobuo Takeshita

发明人： Kenya Nakai ,  Masahisa Shinoda ,  Nobuo Takeshita

IPC分类号： G11B7/00

CPC分类号： G11B7/24 ,  G11B7/0901 ,  G11B7/0941 ,  G11B7/24085 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24314 ,  G11B2007/24316

摘要： When using an optical disc medium that includes pit trains having their widths narrower than a diffraction limit, it is difficult to detect a tracking error signal and take a tracking-servo control while increasing pit density in a direction orthogonal to a pit-train extension direction. Information pit trains are arranged spirally or concentrically and formed in a structure in which their depths are changed periodically at a pitch radially along the optical disc medium, so that the tracking error signal can be obtained by push-pull detection of diffraction light from the structure.

摘要翻译： 当使用包括其宽度窄于衍射极限的凹坑列的光盘介质时，难以检测跟踪误差信号并进行跟踪伺服控制，同时在垂直于凹坑列延伸方向的方向上增加凹坑密度 。 信息坑列被螺旋地或同心地布置并且形成在其深度沿着光盘介质沿径向周期性地改变的结构中，从而可以通过来自结构的衍射光的推挽检测来获得跟踪误差信号 。

公开(公告)号：US20140029400A1

公开(公告)日：2014-01-30

申请号：US14037482

申请日：2013-09-26

申请人： Optical Devices, LLC

发明人： Ron J. Kadlec

IPC分类号： G11B7/09

CPC分类号： G11B7/0941 ,  G11B7/08505 ,  G11B7/08529 ,  G11B7/08541 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/094 ,  G11B7/0945 ,  G11B20/10046 ,  G11B20/18 ,  G11B27/105 ,  G11B27/3027

摘要： A focus servo system for an optical disk drive includes an optical pick-up unit comprising at least one photodetector. At least one analog to digital converter is configured to digitize signals received from the at least one photodetector. At least one processor is configured to execute a digital servo algorithm to process the versions of the digitized signals to calculate a focus error signal (FES) from the versions of the digitized signals and to indicate a focus open condition based on the FES and the versions of the digitized signals.

摘要翻译： 用于光盘驱动器的聚焦伺服系统包括包括至少一个光电检测器的光学拾取单元。 至少一个模/数转换器被配置为数字化从至少一个光电检测器接收的信号。 至少一个处理器被配置为执行数字伺服算法来处理数字化信号的版本以从数字化信号的版本计算聚焦误差信号（FES），并且基于FES和版本来指示焦点打开状态 的数字化信号。

公开(公告)号：US20130272105A1

公开(公告)日：2013-10-17

申请号：US13854475

申请日：2013-04-01

申请人： OD Servo Technologies, LLC

发明人： Ron J. Kadlec

IPC分类号： G11B7/09

CPC分类号： G11B7/0941 ,  G11B7/08505 ,  G11B7/08529 ,  G11B7/08541 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/094 ,  G11B7/0945 ,  G11B20/10046 ,  G11B20/18 ,  G11B27/105 ,  G11B27/3027

摘要： A servo processor for an optical disk drive is provided that includes: an analog-to-digital converter for converting versions of photodetector output signals into digital signals; and a digital signal processor configured to receive the digital signals, the digital signal processor being further configured to determine a focus error signal (FES) and a tracking error signal (TES) from the digital signals, the digital signal processor being further configured to process TES and FES through servo algorithms to produce tracking and focus control signals.

摘要翻译： 提供了一种用于光盘驱动器的伺服处理器，其包括：用于将光电检测器输出信号的形式转换成数字信号的模数转换器; 以及数字信号处理器，被配置为接收所述数字信号，所述数字信号处理器还被配置为从所述数字信号确定聚焦误差信号（FES）和跟踪误差信号（TES），所述数字信号处理器还被配置为处理 TES和FES通过伺服算法产生跟踪和聚焦控制信号。