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1. 发明授权

US06418097B1 Analog to digital converter assembly for normalizing servo error signals and multiplexing reference voltage inputs and digital outputs and improved optical drive system including same 失效
标题翻译：模数转换器组件，用于归一化伺服误差信号和复用参考电压输入和数字输出以及包括其的改进的光驱系统
公开(公告)号：US06418097B1
公开(公告)日：2002-07-09
申请号：US08476527
申请日：1995-06-07
申请人： David L. Schell , Randolph Scott Crupper , Kurt W. Getreuer , Leonardus I. Grassens , David E. Lewis , Marvin B. Davis
发明人： David L. Schell , Randolph Scott Crupper , Kurt W. Getreuer , Leonardus I. Grassens , David E. Lewis , Marvin B. Davis
IPC分类号： G11B700
CPC分类号： G11B17/043 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/00456 , G11B7/00745 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B21/10 , G11B21/106 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , H02K41/0354 , H02K41/0356
摘要： An analog to digital circuit assembly includes a circuit for multiplexing a reference voltage input of an analog to digital converter to produce alternating normalized and referenced digital outputs of an analog signal input at a rate controlled by a sampling clock which includes a switch including first and second inputs, an output, and a control input for alternately connecting the first and the second inputs to the output, the output being applied to the reference voltage input. An information detection device having a detection output and a servo mechanism that controls operations on detected information is provided in conjunction with a signal summing circuit, a direct current voltage reference, a control clock connected, a servo error signal circuit having a servo error signal output and input, a sampling clock, and a processing circuit having an input connected to a digital output of the analog to digital converter and an output for controlling the servo mechanism. The analog to digital circuit assembly is also implemented in an optical disc system for improved operation thereof.
摘要翻译：模数电路组件包括用于多路复用模数转换器的参考电压输入的电路，以产生由采样时钟控制的速率的模拟信号输入的交替归一化和参考的数字输出，该采样时钟包括开关，该开关包括第一和第二输入，输出和用于交替地将第一和第二输入连接到输出的控制输入，输出被施加到参考电压输入。具有检测输出的信息检测装置和控制对检测信息的操作的伺服机构结合信号求和电路，直流电压基准，连接的控制时钟，具有伺服误差信号输出的伺服误差信号电路并输入采样时钟和具有连接到模数转换器的数字输出的输入端的处理电路和用于控制伺服机构的输出。模拟数字电路组件也在光盘系统中实现，以改进其操作。

2. 发明授权

US6087644A Focus capture for optical disc system including detection of quad sum signal to close focus 失效
标题翻译：对于光盘系统进行聚焦捕捉，包括检测四和信号以进行近焦
公开(公告)号：US6087644A
公开(公告)日：2000-07-11
申请号：US924429
申请日：1997-08-27
申请人： David L. Schell
发明人： David L. Schell
IPC分类号： G11B7/0045 , G02B7/04 , G11B5/55 , G11B7/00 , G11B7/0037 , G11B7/004 , G11B7/005 , G11B7/007 , G11B7/085 , G11B7/09 , G11B7/125 , G11B7/135 , G11B11/105 , G11B15/467 , G11B17/04 , G11B19/28 , G11B20/10 , G11B20/12 , G11B21/02 , G11B21/10 , G11B25/04 , G11B33/08 , H02K41/035 , H03B5/08 , H03B5/12
CPC分类号： G11B17/043 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B21/10 , G11B21/106 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , H02K41/0354 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , G11B7/00456 , G11B7/00745 , G11B7/0901 , H02K41/0356
摘要： A system for focus capture wherein a lens is initially retracted to the bottom of its stroke, moved up to the top of its stroke while looking for the maximum Quad Sum signal, then moved back away from the disc while the system looks for the total light coming back from the disc to be above one-half of the peak value it measured, searching for the first zero crossing and, after the Quad Sum is over one-half amplitude, closing focus.
摘要翻译：一种用于聚焦捕获的系统，其中透镜最初缩回到其行程的底部，在寻找最大Quad Sum信号的同时向上移动到其行程的顶部，然后在系统寻找总光时从盘移回从光盘返回到其测量的峰值的一半以上，搜索第一个零交叉，并且在Quad Sum超过一半幅度后，关闭焦点。

3. 发明授权

US5828054A Focusing method and system for focus capture and focus control in optical disc system including detection of Quad Sum signal to close focus 失效
标题翻译：聚焦捕获和聚焦控制在光盘系统中的聚焦方法和系统，包括检测四舍五入信号以进行聚焦
公开(公告)号：US5828054A
公开(公告)日：1998-10-27
申请号：US478164
申请日：1995-06-07
申请人： David L. Schell
发明人： David L. Schell
IPC分类号： G11B7/0045 , G02B7/04 , G11B5/55 , G11B7/00 , G11B7/0037 , G11B7/004 , G11B7/005 , G11B7/007 , G11B7/085 , G11B7/09 , G11B7/125 , G11B7/135 , G11B11/105 , G11B15/467 , G11B17/04 , G11B19/28 , G11B20/10 , G11B20/12 , G11B21/02 , G11B21/10 , G11B25/04 , G11B33/08 , H02K41/035 , H03B5/08 , H03B5/12 , G11B13/04
CPC分类号： G11B17/043 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B21/10 , G11B21/106 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , H02K41/0354 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , G11B7/00456 , G11B7/00745 , G11B7/0901 , H02K41/0356
摘要： An improved focusing method including focus capture and focus control in an optical disc system having a lens and a disc. The method includes the steps of impinging light upon a disc to be read; moving the lens to a first position; monitoring a Quad Sum signal; moving the lens away from the first position towards the disc being read while looking for a maximum of the Quad Sum signal; moving the lens away from the disc; monitoring total light received from the disc; determining, during the monitoring of light, when the total light is above one-half a measured peak value; searching for a first zero crossing; determining when the Quad Sum signal exceeds approximately one-half peak amplitude; and closing focus when the Quad sum signal exceeds the one-half peak amplitude. After closing focus, the method further includes the steps of controlling a focus error signal at a first predetermined gain to produce a first level output, the first predetermined gain being maintained while reading information stored on the disc; and controlling the focus error signal at a second predetermined gain to produce a second level output, the second predetermined gain being maintained while writing information on to the disc, and the second predetermined gain being less than the first predetermined gain. Electronic circuitry and mechanical apparatus are provided for performing the steps of the method.
摘要翻译：一种改进的聚焦方法，包括在具有透镜和光盘的光盘系统中的聚焦捕获和聚焦控制。该方法包括将光照射在待读取的盘上的步骤; 将镜头移动到第一位置; 监视Quad Sum信号; 在寻找Quad Sum信号的最大值的同时，将镜头从第一位置移向正在读取的光盘; 将镜头从光盘移开; 监测从光盘接收的总光; 在光的监测期间，当总光量大于测量峰值的二分之一时; 寻找第一个过零点; 确定Quad Sum信号何时超过大约二分之一的峰值幅度; 并且当Quad和信号超过二分之一峰值幅度时闭合聚焦。在关闭焦点之后，该方法还包括以下步骤：以第一预定增益控制聚焦误差信号以产生第一电平输出，在读取盘上存储的信息的同时，保持第一预定增益; 以及以第二预定增益控制所述聚焦误差信号以产生第二电平输出，在将信息写入所述光盘时保持所述第二预定增益，并且所述第二预定增益小于所述第一预定增益。提供电子电路和机械装置用于执行该方法的步骤。

4. 发明授权

US5729511A Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal 失效
标题翻译：具有伺服电动机和伺服误差检测组件的光盘系统相对于监视的四和信号进行操作
公开(公告)号：US5729511A
公开(公告)日：1998-03-17
申请号：US376882
申请日：1995-01-25
申请人： David L. Schell , Randolph S. Crupper , Marvin B. Davis , Kurt W. Getreuer , Leonardus J. Grassens , David E. Lewis
发明人： David L. Schell , Randolph S. Crupper , Marvin B. Davis , Kurt W. Getreuer , Leonardus J. Grassens , David E. Lewis
IPC分类号： G11B7/0045 , G02B7/04 , G11B5/55 , G11B7/00 , G11B7/0037 , G11B7/004 , G11B7/005 , G11B7/007 , G11B7/085 , G11B7/09 , G11B7/125 , G11B7/135 , G11B11/105 , G11B15/467 , G11B17/04 , G11B19/28 , G11B20/10 , G11B20/12 , G11B21/02 , G11B21/10 , G11B25/04 , G11B33/08 , H02K41/035 , H03B5/08 , H03B5/12
CPC分类号： G11B17/043 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B21/10 , G11B21/106 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , H02K41/0354 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , G11B7/00456 , G11B7/00745 , G11B7/0901 , H02K41/0356
摘要： An optical drive system includes an optical assembly, a light source capable of transmitting light through the optical assembly, an objective lens positioned to direct light between the optical assembly and a respective information storage medium, and an actuator suspending the objective lens for relative motion thereof with respect to the actuator. A photodetector is disposed in a path of returning light to measure return light received from the respective medium. A monitoring circuit is provided to monitor a Quad Sum signal associated with the return light. A first servomotor is employed to move the objective lens in a tracking direction relative to the actuator and to move the objective lens during focus capture relative to the respective medium being read while system circuitry searches for a maximum Quad Sum signal. A second servo motor is employed to move the objective lens in a focusing direction relative to the actuator assembly. A first electronic circuit is provided to control the first and second servomotors. A servo error circuit is coupled to the first electronic circuit and the photodetector to determine when the return light exceeds a predetermined value, to search for a first zero crossing determining when the Quad Sum signal exceeds a predetermined amplitude, and to indicate to the first electronic circuit to direct close of focus by the second servomotor when the Quad Sum signal exceeds the predetermined amplitude.
摘要翻译：光学驱动系统包括光学组件，能够通过光学组件透射光的光源，定位成在光学组件和各个信息存储介质之间引导光的物镜，以及悬挂物镜以进行相对运动的致动器相对于致动器。光检测器设置在返回光的路径中，以测量从相应介质接收的返回光。提供监视电路以监视与返回光相关联的Quad Sum信号。使用第一伺服电机相对于致动器在跟踪方向上移动物镜，并且在聚焦捕获期间相对于正在读取的相应介质移动物镜，同时系统电路搜索最大Quad Sum信号。使用第二伺服电机相对于致动器组件沿聚焦方向移动物镜。提供第一电子电路以控制第一和第二伺服电动机。伺服误差电路耦合到第一电子电路和光电检测器以确定何时返回光超过预定值，以搜索第一过零点，以确定何时Quad Sum信号超过预定幅度，并向第一电子电路，当Quad Sum信号超过预定幅度时，由第二伺服电机直接接近焦点。

5. 发明授权

US4823330A Focus servo loop off-set compensation 失效
标题翻译：聚焦伺服环路偏移补偿
公开(公告)号：US4823330A
公开(公告)日：1989-04-18
申请号：US52128
申请日：1987-05-04
申请人： Nelson K. Arter , Mark G. Call , Mark L. Rhoades
发明人： Nelson K. Arter , Mark G. Call , Mark L. Rhoades
IPC分类号： G11B7/09 , G11B7/12
CPC分类号： G11B7/094 , G11B7/0945 , G11B2007/0919 , G11B7/0909
摘要： Error compensation in a feedback servo system. The feedback servo loop in, for example, a head positioning circuit in an optical disk data recording and retrieval system is provided with a compensation signal to correct for misalignment or other errors. The head in such a system must be dynamically maintained at a best focus position but, through use and transporting, the alignment of the head position error detecting system can be disturbed. In some cases, the loop circuit parameters may drift from their original values. To correct for errors introduced from such causes, the head is positioned at best focus and the focus error (head position error) signal is sensed. A correction signal is supplied which cancels out the sensed value while the system is operating.
摘要翻译：反馈伺服系统中的误差补偿。在例如光盘数据记录和检索系统中的头定位电路中的反馈伺服环路被提供有补偿信号以校正未对准或其他错误。这种系统中的头部必须被动态地保持在最佳对焦位置，但是通过使用和传送，头部位置误差检测系统的对准可能受到干扰。在某些情况下，环路电路参数可能偏离其原始值。为了纠正从这些原因引起的错误，头部被定位在最佳焦点处，并且感测到聚焦误差（头位置误差）信号。提供校正信号，其在系统运行时消除感测值。

6. 发明授权

US4644516A Optical head 失效
标题翻译：光头
公开(公告)号：US4644516A
公开(公告)日：1987-02-17
申请号：US603299
申请日：1984-04-24
申请人： Tohru Musha
发明人： Tohru Musha
IPC分类号： G02B7/00 , G11B7/08 , G11B7/09 , G11B7/12 , G11B7/22 , G11B7/00
CPC分类号： G11B7/0917 , G11B7/12 , G11B2007/0919 , G11B7/22
摘要： An optical head for reading a signal recorded along spiral or concentric tracks on an optical disc including a semiconductor laser for emitting a linearly polarized light beam, a polarization prism for transmitting the light beam, an objective lens for projecting the light beam upon the optical disc and for collecting a light beam reflected by the optical disc, a critical angle prism for totally reflecting the light beam reflected by the polarization prism and a light detector for receiving the light beam totally reflected by an optical surface of the critical angle prism. The polarization prism and critical angle prism are integrally coupled with each other to form an assembly of prisms which is rotated to adjust an incident angle of the light beam impinging upon the optical surface of critical angle prism substantially at a critical angle of total reflection.
摘要翻译：一种用于读取在包括用于发射线偏振光束的半导体激光器的光盘上沿着螺旋或同心轨道记录的信号的光学头，用于透射光束的偏振棱镜，用于将光束投影到光盘上的物镜并且用于收集由光盘反射的光束，用于全反射由偏振棱镜反射的光束的临界角棱镜和用于接收由临界角棱镜的光学表面全反射的光束的光检测器。偏振棱镜和临界角棱镜彼此一体地联接以形成棱镜的组件，其被旋转以调节入射到临界角棱镜的光学表面上的光束的入射角，基本上处于全反射的临界角。

7. 发明授权

US4423495A Method and apparatus for recording optically an information signal on a record medium along tracks 失效
标题翻译：在记录介质上光学地记录信息信号的方法和装置
公开(公告)号：US4423495A
公开(公告)日：1983-12-27
申请号：US301098
申请日：1981-09-10
申请人： Tohru Musha , Kiichi Kato , Kenichi Ito
发明人： Tohru Musha , Kiichi Kato , Kenichi Ito
IPC分类号： G02B7/28 , G11B7/09 , G11B7/12 , G11B7/125 , G11B7/135 , G11B7/1359 , G11B11/105 , G11B7/00
CPC分类号： G11B7/0917 , G11B11/10506 , G11B11/10536 , G11B11/10576 , G11B7/0941 , G11B7/12 , G11B7/1359 , G11B2007/0919 , G11B7/0903
摘要： In a method and apparatus of recording optically an information signal on a disc along tracks by projecting a main beam modulated with the information signal onto the rotating disc by means of an objective lens, in order to obtain focussing and tracking error signals, a sub beam inclined with respect to the main beam is also projected onto the disc by means of the objective lens. The main and sub beams reflected by the video disc are made incident as parallel light fluxes upon a detection prism surface which is set substantially at a critical angle with respect to the main beam, but at an angle smaller or larger than the critical angle with respect to the sub beam, and two light fluxes of the reflected main beam which situate on respective sides of a boundary plane including the central light ray and perpendicular to a plane of incidence, and are reflected by the reflection surface are separately received by two light receiving regions which are divided along a boundary plane including the main beam reflected by the reflection surface and perpendicular to the plane of incidence. The focussing error signal is derived as a difference between output signals from the two light receiving regions. The sub beam transmitted through and refracted by the reflection surface is received by a light detector and the tracking error signal is derived by detecting a variation in a light amount of the sub beam impinging upon the light detector.
摘要翻译：在利用物镜将通过信息信号调制的主波束投射到旋转盘上的光盘上将信息信号光学记录在光盘上的方法和装置中，为了获得聚焦和跟踪误差信号，相对于主光束倾斜也通过物镜投影到光盘上。由视频盘反射的主光束和副光束作为平行光束入射到检测棱镜表面上，该检测棱镜表面基本上被设置为相对于主光束的临界角，但是以相对于主光束的临界角小于或大于并且反射主光束的两个光束位于包括中心光线并且垂直于入射平面的边界平面的相应侧上并被反射表面反射的两个光束分别被两个光接收沿着包括由反射面反射并垂直于入射平面的主光束的边界平面分割的区域。聚焦误差信号被导出为来自两个光接收区域的输出信号之间的差。由光检测器接收透射并被反射面折射的子光束，并且通过检测入射到光检测器上的子光束的光量的变化导出跟踪误差信号。

8. 发明授权

US6122232A Isolation apparatus for use in disc drive system to mitigate effects of undesired mechanical forces and disc drive system including same 失效
标题翻译：用于盘驱动系统的隔离装置，以减轻不期望的机械力的影响和包括其的盘驱动系统
公开(公告)号：US6122232A
公开(公告)日：2000-09-19
申请号：US8989
申请日：1998-01-20
申请人： David L. Schell , Randolph S. Crupper , Marvin B. Davis , Kurt W. Getreuer , Leonardus J. Grassens , David E. Lewis
发明人： David L. Schell , Randolph S. Crupper , Marvin B. Davis , Kurt W. Getreuer , Leonardus J. Grassens , David E. Lewis
IPC分类号： G11B7/0045 , G02B7/04 , G11B5/55 , G11B7/00 , G11B7/0037 , G11B7/004 , G11B7/005 , G11B7/007 , G11B7/085 , G11B7/09 , G11B7/125 , G11B7/135 , G11B11/105 , G11B15/467 , G11B17/04 , G11B19/28 , G11B20/10 , G11B20/12 , G11B21/02 , G11B21/10 , G11B25/04 , G11B33/08 , H02K41/035 , H03B5/08 , H03B5/12
CPC分类号： G11B17/043 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B21/10 , G11B21/106 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , H02K41/0354 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , G11B7/00456 , G11B7/00745 , G11B7/0901 , H02K41/0356
摘要： A mechanical isolation apparatus suited for mitigating the effects of undesired mechanical forces upon disc drive system components, such as those found in compact disc, laser disc, magneto-optical player/recorder devices and similar devices. Component members are provided for mitigating the effects of compressive forces, vibration isolation, and thermal expansion, and may include compression ribs mounted on a housing for absorbing compressive forces. The housing is preferably adapted to fit on the end of a pole piece assembly. A crash stop may also be provided as a shock absorbing bumper and isolator to prevent a moving carriage from crashing into a solid surface. The compressive ribs and the crash stop are made of a material that exhibits minimum creep, such as a silicon rubber, polyurethane, or injection molded plastic.
摘要翻译：一种机械隔离装置，适用于减轻不期望的机械力对磁盘驱动器系统部件的影响，例如在光盘，激光盘，磁光播放器/记录器装置和类似装置中发现的那些。提供了用于减轻压缩力，隔振和热膨胀的影响的组件构件，并且可以包括安装在壳体上用于吸收压缩力的压缩肋。壳体优选适于装配在极片组件的端部上。还可以提供碰撞停止件作为减震保险杠和隔离器，以防止移动的滑架撞击到固体表面。压缩肋和紧急停止件由表现出最小蠕变的材料制成，例如硅橡胶，聚氨酯或注模塑料。

9. 发明授权

US5920539A Apparatus and method for suppression of electromagnetic emissions having a groove on an external surface for passing an electrical conductor 失效
标题翻译：用于抑制电磁辐射的装置和方法，其在外表面上具有用于通过电导体的凹槽
公开(公告)号：US5920539A
公开(公告)日：1999-07-06
申请号：US420381
申请日：1995-04-11
申请人： David L. Schell , Marvin B. Davis
发明人： David L. Schell , Marvin B. Davis
IPC分类号： G11B7/0045 , G11B5/55 , G11B7/0037 , G11B7/004 , G11B7/005 , G11B7/007 , G11B7/085 , G11B7/09 , G11B7/12 , G11B7/125 , G11B7/135 , G11B11/10 , G11B11/105 , G11B15/467 , G11B17/04 , G11B19/00 , G11B19/28 , G11B20/10 , G11B20/12 , G11B20/18 , G11B21/02 , G11B21/10 , G11B25/04 , G11B33/02 , G11B33/08 , G11B33/14 , H01S5/022 , H02K41/035 , H03B5/08 , H03B5/12 , H05K9/00 , G11B21/16 , G11B7/08
CPC分类号： G11B5/5526 , G11B11/10563 , G11B17/043 , G11B17/0438 , G11B20/10009 , G11B21/10 , G11B21/106 , G11B33/14 , G11B7/0037 , G11B7/004 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0943 , G11B7/0945 , G11B7/12 , G11B7/126 , G11B7/1356 , H02K41/0354 , G11B11/10576 , G11B11/10595 , G11B19/00 , G11B20/10 , G11B20/1258 , G11B20/1833 , G11B2007/0919 , G11B2020/10916 , G11B25/043 , G11B33/02 , G11B7/00745 , G11B7/0901 , H02K41/0356
摘要： An apparatus for the suppression of electromagnetic emissions from an electronic device. The apparatus includes a die cast metallic container having a continuous wall, a shoulder formed on the continuous wall, a plurality of rounded corners, and a neck portion. The neck portion and shoulder mate with a deep drawn metallic cap. A source of electromagnetic emissions is disposed in the interior space defined by the container and the cap, and a flex strip source passes through a groove formed in an external wall of the container to supply the source. The container is adapted for use in an optical disc system and provides a mount for a semiconductor laser modulated at a radio frequency on the order of 450 MHz. The container also holds auxiliary electronics. A conductive tape seals the assembly so that electromagnetic emissions of the laser are confined within the interior space.
摘要翻译：一种用于抑制电子设备的电磁辐射的装置。该设备包括具有连续壁的压铸金属容器，形成在连续壁上的肩部，多个圆角和颈部。颈部和肩部配有深拉金属帽。电磁辐射源设置在由容器和盖子限定的内部空间中，并且柔性带材源穿过形成在容器的外壁中的凹槽以供应源。该容器适用于光盘系统，并提供一种用于在450MHz量级的射频调制的半导体激光器的安装座。集装箱也装有辅助电子设备。导电胶带密封组件，使得激光的电磁辐射被限制在内部空间内。

10. 发明授权

US5532989A Seek actuator for optical recording 失效
标题翻译：寻求执行器进行光学记录
公开(公告)号：US5532989A
公开(公告)日：1996-07-02
申请号：US399268
申请日：1995-03-06
申请人： Kurt W. Getreuer , Leonardus J. Grassens
发明人： Kurt W. Getreuer , Leonardus J. Grassens
IPC分类号： G11B5/55 , G11B7/0037 , G11B7/004 , G11B7/007 , G11B7/085 , G11B7/09 , G11B7/135 , G11B11/105 , G11B17/04 , G11B20/10 , G11B20/12 , G11B21/10 , H02K41/035 , G11B7/00
CPC分类号： G11B5/5526 , G11B11/10563 , G11B17/043 , G11B17/0438 , G11B20/10009 , G11B21/10 , G11B21/106 , G11B7/0037 , G11B7/004 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0943 , G11B7/0945 , G11B7/1356 , H02K41/0354 , G11B11/10576 , G11B11/10595 , G11B20/1258 , G11B2007/0919 , G11B2020/10916 , G11B7/00745 , G11B7/0901 , H02K41/0356
摘要： An apparatus for optically reading or recording information on an optical disc which is rotatable about an axis of rotation. The apparatus includes a frame, a carriage, a carriage drive, an objective lens, an objective lens holder, a focus drive and a fine tracking drive. The objective lens is mounted on the objective lens holder so that the optical axis of the objective lens substantially intersects the center of mass of the carriage. The fine motor, used for tracking and focus, has a center of mass that substantially lies on the optical axis and proximate the center of mass of the carriage.
摘要翻译：一种用于在可围绕旋转轴线旋转的光盘上光学读取或记录信息的装置。该装置包括框架，托架，托架驱动器，物镜，物镜保持器，聚焦驱动器和精细跟踪驱动器。物镜安装在物镜支架上，使得物镜的光轴基本上与托架的质心相交。用于跟踪和聚焦的精细电机具有基本上位于光轴上并且靠近托架质心的质心。

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