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公开(公告)号：US5202864A
公开(公告)日：1993-04-13
申请号：US813930
申请日：1991-12-27
CPC分类号： G11B7/08517 , G11B21/085 , G11B27/105 , G11B7/0946 , G11B7/0956
摘要： In an apparatus in which information is reproduced by projecting/receiving an optical beam to/from a recording carrier having a large number of information tracks, tracking control is performed so as to maintain a reproducing position on an information track by supplying a track deviation signal to an actuator. If this track deviation signal becomes asymmetric by an inclination, etc. of the recording carrier so that a shock is applied to the apparatus, jumping out of a track occurs, resulting in slip-off of the optical beam from the reproducing position. This slip-off can be prevented by detecting a position of a movable support member carrying a focusing lens for projecting and receiving the optical beam and feeding back the position signal to the tracking control system, or by extracting a low-frequency component of an output signal of a control circuit and feeding back the extracted signal to the tracking control system.
摘要翻译： 在通过向具有大量信息轨道的记录载体投射/接收光束来再现信息的装置中，执行跟踪控制，以通过提供轨道偏差信号来保持信息轨道上的再现位置 到致动器。 如果该轨道偏离信号由于记录载体的倾斜等而变得不对称，使得对设备施加冲击，则跳出轨道，导致光束从再现位置脱落。 可以通过检测携带用于投射和接收光束的聚焦透镜的可移动支撑构件的位置并将位置信号反馈到跟踪控制系统，或者通过提取输出的低频分量来防止该滑落 控制电路的信号并将提取的信号反馈到跟踪控制系统。
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公开(公告)号：US5109366A
公开(公告)日：1992-04-28
申请号：US337156
申请日：1989-04-12
CPC分类号： G11B7/08517 , G11B21/085 , G11B27/105 , G11B7/0946 , G11B7/0956
摘要： In an apparatus in which information is reproduced by projecting/receiving an optical beam to/from a recording carrier having a large number of information tracks, tracking control is performed so as to keep a reproducing position on an information track by supplying a track deviation signal to an actuator. If this track deviation signal becomes asymetric by an inclination, etc. of the recording carrier so that a shock is applied to the apparatus, jumping out of a track occurs, resulting in slipping-off of the reproducing position. This slipping-off can be prevented by detecting a position of a movable support member carrying a focusing lens for projecting and receiving the optical beam and feeding back the position signal to the tracking control system, or by extracting a low-frequency component of an output signal of a control circuit and feeding back the extracted signal to the tracking control system.
摘要翻译： 在通过向具有大量信息轨道的记录载体投射/接收光束来再现信息的装置中，执行跟踪控制，以通过提供轨道偏差信号来保持信息轨道上的再现位置 到致动器。 如果该轨道偏离信号由于记录载体的倾斜度等而不对称，使得对设备施加冲击，则跳出轨道，导致再现位置的滑落。 可以通过检测携带用于投射和接收光束的聚焦透镜的可移动支撑构件的位置并将位置信号反馈到跟踪控制系统，或者通过提取输出的低频分量来防止该滑落 控制电路的信号并将提取的信号反馈到跟踪控制系统。
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公开(公告)号：US06449232B1
公开(公告)日：2002-09-10
申请号：US09601379
申请日：2000-08-01
申请人： Masaya Kuwahara , Shinichi Yamada , Hiroyuki Yamaguchi , Masuo Maruyama , Masanari Mohri , Akihiro Sakaguchi , Yasuo Nishihara , Masayoshi Shioya
发明人： Masaya Kuwahara , Shinichi Yamada , Hiroyuki Yamaguchi , Masuo Maruyama , Masanari Mohri , Akihiro Sakaguchi , Yasuo Nishihara , Masayoshi Shioya
IPC分类号： G11B700
CPC分类号： G11B19/12 , G11B7/08511 , G11B7/08517 , G11B7/0945 , G11B2007/0006
摘要： Optical disks compliant with different standards are recorded or reproduced by a single recording/reproducing apparatus by a first step of determining a substrate thickness of the disk based on a focusing error signal, when a focusing section for bringing the light beam into a focus on the disk is moved in such a way as to approach or withdraw from the recording surface of the disk; a second step of performing any one step of determining the number of recording surfaces of the disk when the focusing section is moved in such a way as to approach or withdraw from the recording surface of the disk, and determining whether or not the disk can be recorded and reproduced using a tracking error signal detected when the light beam crosses the track.
摘要翻译： 通过第一步骤，通过单个记录/再现装置记录或再现基于聚焦误差信号的盘的基板厚度的光盘，当聚焦部分将光束聚焦在 盘以从盘的记录表面接近或退出的方式移动; 执行以下步骤：当聚焦部分以从盘的记录表面接近或退出的方式移动时确定盘的记录表面的数量的步骤，并且确定盘是否可以是 使用当光束穿过轨道时检测到的跟踪误差信号来记录和再现。
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4.发明授权Method and apparatus for recognizing optical discs, optical disc drive, and method and apparatus for distinguishing data storage layer 有权用于识别光盘的方法和装置，光盘驱动器以及用于区分数据存储层的方法和装置公开(公告)号：US07277372B2
公开(公告)日：2007-10-02
申请号：US10805965
申请日：2004-03-22
IPC分类号： G11B7/00
CPC分类号： G11B7/13925 , G11B7/08511 , G11B7/1378 , G11B7/139 , G11B19/12 , G11B2007/0006 , G11B2007/0013 , G11B2007/13727
摘要： A method for recognizing at least two types of optical discs, which are associated with multiple different numerical apertures, includes the step of setting the numerical aperture of a focusing mechanism equal to a first one of the multiple different numerical apertures. The focusing mechanism is used to focus a light beam on a data storage layer of a given optical disc. The first numerical aperture is smaller than any of the other numerical apertures. The method further includes the step of recognizing the type of the given optical disc by the first numerical aperture that has been selected in the step of setting the numerical aperture.
摘要翻译： 用于识别与多个不同数值孔径相关联的至少两种类型的光盘的方法包括将聚焦机构的数值孔径设置为等于多个不同数值孔径中的第一个的步骤。 聚焦机构用于将光束聚焦在给定光盘的数据存储层上。 第一数值孔径小于任何其他数值孔径。 该方法还包括通过在设置数值孔径的步骤中已经选择的第一数值孔径识别给定光盘的类型的步骤。
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5.发明授权Optical recording medium with prepit regions and recording/reproducing method thereof 有权具有预凹坑区域的光记录介质及其记录/再现方法公开(公告)号：US06965545B2
公开(公告)日：2005-11-15
申请号：US10110613
申请日：2001-08-16
CPC分类号： G11B7/24085 , G11B7/00718 , G11B7/00745 , G11B7/0938 , G11B7/261 , G11B11/10576 , G11B11/10578
摘要： An information recording medium for reproducing information by irradiation with a laser beam condensed by an objective lens with a numerical aperture NA includes a disk-shaped substrate and a recording layer disposed on the substrate. On the surface of the substrate, a plurality of prepit regions and a plurality of data regions are disposed alternately along spiral or concentric virtual track centers. Each prepit region includes a pair of wobble pits for tracking servo, and a length L (μm) of the wobble pit along the virtual track center, a wavelength λ (μm) of the laser beam, and a numerical aperture NA satisfy a relationship: 0.3≦L. NA/λ≦0.65.
摘要翻译： 用于通过用具有数值孔径NA的物镜聚光的激光束照射来再现信息的信息记录介质包括盘形基板和设置在基板上的记录层。 在基板的表面上，多个预凹坑区域和多个数据区域沿着螺旋或同心的虚拟轨道中心交替设置。 每个预凹坑区域包括用于跟踪伺服的一对摆动凹坑，沿着虚拟轨道中心的摆动凹坑的长度L（母体），激光束的波长λ（mum）和数值孔径NA满足关系： 0.3 <= L。 NA /λ<= 0.65。
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公开(公告)号：US06222340B1
公开(公告)日：2001-04-24
申请号：US09381483
申请日：1999-12-10
IPC分类号： H02P822
CPC分类号： H02P8/22 , G11B5/5552 , G11B7/08582
摘要： According to a control device for a stepping motor of the present invention, in a first operation mode, a microstep driving section 16 is selected, and an output of this microstep driving section 16 is applied to a driving section 21 through a command selector 12, whereby a stepping motor 25 is microstep driven by this driving section 21. Furthermore, in a second operation mode, a forced driving section 15 is selected, and an output of this forced driving section 15 is applied to the driving section 21 through the command selector 12, whereby the stepping motor 25 is forced driven by this driving section 21, i.e., a high-speed rotation of a rotor 29 is started from any rotation angle with the microstep driving. Furthermore, in a third operation mode, a driving pattern generating section 13 is selected, an output of this driving pattern generating section 13 is applied to the driving section 21 through the command selector 12, whereby a high-speed rotation driving of the stepping motor 25 is continued by this driving section 21.
摘要翻译： 根据本发明的步进电机的控制装置，在第一操作模式中，选择微步驱动部分16，并且该微步驱动部分16的输出通过命令选择器12被施加到驱动部分21， 从而由该驱动部分21驱动步进电动机25.此外，在第二操作模式中，选择强制驱动部分15，并且该强制驱动部分15的输出通过命令选择器施加到驱动部分21 如图12所示，由此由该驱动部21强制驱动步进电动机25，即，通过微步驱动从任何旋转角开始转子29的高速旋转。 此外，在第三操作模式中，选择驱动模式生成部13，该驱动模式生成部13的输出通过指令选择器12被施加到驱动部21，从而高速旋转驱动步进电动机 25由该驱动部21继续。
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