公开(公告)号：US09754619B1

公开(公告)日：2017-09-05

申请号：US15335835

申请日：2016-10-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kohei Nakata

IPC: G11B7/09 ,  G11B7/005 ,  G11B7/13 ,  G11B20/18 ,  G11B7/1353 ,  G11B20/10 ,  G11B7/0037

CPC classification number: G11B7/094 ,  G11B7/0037 ,  G11B7/005 ,  G11B7/09 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/0943 ,  G11B7/13 ,  G11B7/1353 ,  G11B7/1381 ,  G11B20/10009 ,  G11B20/10388 ,  G11B20/10398 ,  G11B20/10462 ,  G11B20/18

Abstract: In an optical disc apparatus for reproducing information recorded on a track of an optical disc, an optical head irradiates a light beam onto the track, detects a reflected light reflected by the track, and generates a reproduction signal based on the reflected light. A decoder circuit decodes the reproduction signal, and generates a decoded signal including information recorded on the track. A correlation detector circuit calculates a cross-correlation value between the reproduction signal and the decoded signal. A servo circuit detects a deviation amount of an irradiation position of the light beam onto the track, from the reproduction signal, and controls the irradiation position of the optical head based on the cross-correlation value and the deviation amount.

公开(公告)号：US09153271B2

公开(公告)日：2015-10-06

申请号：US14298316

申请日：2014-06-06

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Yoshimi Iso ,  Mitsuo Hagiwara ,  Mitsuyuki Kimura

IPC: G11B7/09 ,  G11B7/0037 ,  G11B7/007 ,  G11B23/40 ,  G11B7/00

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

Abstract: 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.

Abstract translation: 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：US09123357B2

公开(公告)日：2015-09-01

申请号：US14303635

申请日：2014-06-13

Applicant: Funai Electric Co., Ltd.

Inventor： Kenji Okamoto

IPC: G11B7/00 ,  G11B7/09

CPC classification number: G11B7/0917 ,  G11B7/0909 ,  G11B7/1378

Abstract: An optical pickup device includes a light source configured to output laser light, an objective lens configured to converge the laser light emitted from the light source onto an optical disc, a sensor lens including a lens surface on which return light reflected by the optical disc is incident and that is also configured to generate an astigmatism in the return light, and a light-receiving element configured to receive the return light which has passed through the sensor lens 40 and to generate a focus error signal based on the received return light. The lens surface includes a first curvature radius in a first direction and a second curvature radius different from the first curvature radius in a second direction that is perpendicular or substantially perpendicular to the first direction.

Abstract translation: 一种光拾取装置，包括配置为输出激光的光源，配置成将从光源发射的激光会聚到光盘上的物镜，包括其上由光盘反射的返回光在其上的透镜表面的传感器透镜 并且还被配置为在返回光中产生像散;以及光接收元件，被配置为接收已经通过传感器透镜40的返回光并且基于接收的返回光产生聚焦误差信号。 透镜表面包括在垂直于或基本上垂直于第一方向的第二方向上在第一方向上的第一曲率半径和与第一曲率半径不同的第二曲率半径。

公开(公告)号：US20140286148A1

公开(公告)日：2014-09-25

申请号：US14298316

申请日：2014-06-06

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Yoshimi ISO ,  Mitsuo HAGIWARA ,  Mitsuyuki KIMURA

IPC: G11B7/09

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

Abstract: 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.

Abstract translation: 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驱动电路。

公开(公告)号：US08830809B2

公开(公告)日：2014-09-09

申请号：US13890527

申请日：2013-05-09

Applicant: Hitachi-LG Data Storage, Inc. ,  Hitachi Consumer Electronics Co., Ltd.

Inventor： Kouji Fujita

IPC: G11B7/00 ,  G11B7/09 ,  G11B7/24044 ,  G11B7/24062

CPC classification number: G11B7/0917 ,  G11B7/24044 ,  G11B7/24062

Abstract: An optical information recording/reproduction device includes a detection unit which detects a focus-direction height of a recording medium, a focus adjustment unit which adjusts a focus-direction distance between the recording medium and a signal light optical system and a reference light system, and a control unit which controls the focus adjustment unit so that a relative distance between the object lens of the signal light optical system and the recording medium is adjusted according to the focus-direction height of the recording medium detected by the detection unit.

Abstract translation: 光信息记录/再现装置包括检测记录介质的焦点方向高度的检测单元，调节记录介质与信号光光学系统与参考光系统之间的焦点方向距离的调焦单元， 以及控制单元，其控制所述焦点调节单元，使得根据由所述检测单元检测的所述记录介质的焦点方向高度来调节所述信号光学系统的所述物镜与所述记录介质之间的相对距离。

公开(公告)号：US08687472B1

公开(公告)日：2014-04-01

申请号：US13670936

申请日：2012-11-07

Applicant: Marvell International Ltd.

Inventor： Antonius Leonardus Johannes Dekker

IPC: G11B7/00 ,  G11B7/1372 ,  G11B7/09 ,  G01N21/94

CPC classification number: G11B20/1816 ,  G01M11/0278 ,  G01N21/94 ,  G11B7/0917 ,  G11B7/0948 ,  G11B7/121 ,  G11B7/1372

Abstract: Apparatus having corresponding methods comprise: a light source configured to produce light; a lens configured to focus the light on an optical disc; a photo detector configured to obtain a measurement of the light reflected by the optical disc; and a controller configured to determine a cleanliness of the lens based on the measurement of the light reflected by the optical disc responsive to the lens focusing the light on a surface of the optical disc.

Abstract translation: 具有相应方法的装置包括：被配置为产生光的光源; 配置成将光聚焦在光盘上的透镜; 光检测器，被配置为获得由所述光盘反射的光的测量值; 以及控制器，被配置为基于将所述光聚焦到所述光盘的表面上的所述透镜的基础上测量由所述光盘反射的光的测量来确定所述透镜的清洁度。

公开(公告)号：US08416651B2

公开(公告)日：2013-04-09

申请号：US12952135

申请日：2010-11-22

Applicant: Ron J Kadlec

Inventor： Ron J Kadlec

IPC: G11B21/08

CPC classification number: 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

Abstract: 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.

Abstract translation: 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：US08284643B2

公开(公告)日：2012-10-09

申请号：US12951880

申请日：2010-11-22

Applicant: Tsutomu Ishimoto

Inventor： Tsutomu Ishimoto

IPC: G11B7/00

CPC classification number: G11B7/0917 ,  G11B7/00453 ,  G11B7/0065 ,  G11B7/00781 ,  G11B7/0938 ,  G11B7/24038 ,  G11B7/24044 ,  G11B2007/0009

Abstract: A recording apparatus for performing information recording using formation of marks by focusing a first light with an objective lens at a given position in a recording layer included in an optical disc recording medium, includes: a rotation driving unit for rotating the optical disc recording medium; a focus servo control unit for condensing a second light which is different from the first light on a reflection film, and for controlling a position of the objective lens so that a focal position of the second light follows the reflection film; a recording position setting unit for setting an information recording position of the first light in a focus direction by changing the collimation of the first light; a surface wobbling amount estimating unit; and a surface wobbling estimation amount acquisition control unit for acquiring a surface wobbling estimation amount for each rotation angle within one revolution of the disc.

Abstract translation: 一种用于通过将包含在光盘记录介质中的记录层中的给定位置处的物镜聚焦在一起的物镜的第一光进行信息记录的记录装置，包括：旋转驱动单元，用于旋转光盘记录介质; 聚焦伺服控制单元，用于将与第一光不同的第二光聚焦在反射膜上，并用于控制物镜的位置，使得第二光的焦点位置与反射膜相邻; 记录位置设定单元，用于通过改变第一光的准直来设定聚焦方向上的第一光的信息记录位置; 表面摆动量估计单元; 以及表面摆动估计量获取控制单元，用于获取盘的一圈内每个旋转角度的表面摆动估计量。

公开(公告)号：US08050169B2

公开(公告)日：2011-11-01

申请号：US12464219

申请日：2009-05-12

Applicant: Johannes Leopoldus Bakx

Inventor： Johannes Leopoldus Bakx

IPC: G11B7/00

CPC classification number: G11B7/0956 ,  G11B7/0917 ,  G11B7/1387 ,  G11B7/13925 ,  G11B2007/0013

Abstract: The optical scanning device [10] is arranged for scanning a record carrier [1]. The record carrier has an outer face [7]. The scanning device comprises a radiation source [11] for generating a radiation beam [12] and an objective system [25] having an exit face [26] arranged for evanescent coupling of the radiation beam between the exit face and the outer face and for converging the radiation beam to a focus [27]. A tilt measuring system [67, 77] provides a tilt signal [87; 88] representing a tilt angle between the objective system and the record carrier. A control unit [95] determines a distance signal representing a distance between the exit face and the focus from the tilt signal.

Abstract translation: 光学扫描装置[10]被布置用于扫描记录载体[1]。 记录载体具有外表面[7]。 扫描装置包括用于产生辐射束[12]的辐射源[11]和具有出射面[26]的物镜系统[25]，该出射面布置成用于在出射面和外表面之间的辐射束的ev逝耦合， 将辐射束会聚到焦点[27]。 倾斜测量系统[67,77]提供倾斜信号[87; 88]表示物镜系统和记录载体之间的倾斜角度。 控制单元[95]从倾斜信号确定表示出射面和焦点之间的距离的距离信号。

公开(公告)号：US20110249544A1

公开(公告)日：2011-10-13

申请号：US12861840

申请日：2010-08-24

Applicant: Ching-Cherng SUN ,  Yeh-Wei YU

Inventor： Ching-Cherng SUN ,  Yeh-Wei YU

IPC: G11B7/00

CPC classification number: G11B7/0917 ,  G11B7/0065 ,  G11B7/1378 ,  G11B2007/00653

Abstract: A reading device includes a spatial light modulator, a zoom lens set, an object lens, an image sensor, and an adjusting module. The spatial light modulator provides a reading beam. The zoom lens set forms the reading beam into a real image. The object lens focuses the real image onto a collinear holographic storage medium and thus produces a diffraction signal. The image sensor converts the diffraction signal into an electric signal. The adjusting module adjusts the optical magnification of the zoom lens set according to the quality of the diffraction signal.

Abstract translation: 读取装置包括空间光调制器，变焦透镜组，物镜，图像传感器和调整模块。 空间光调制器提供读取光束。 变焦透镜组将读取光束形成为真实图像。 物镜将实像聚焦到共线全息存储介质上，从而产生衍射信号。 图像传感器将衍射信号转换为电信号。 调整模块根据衍射信号的质量调整变焦镜头组的光学倍率。