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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：US5331615A
公开(公告)日：1994-07-19
申请号：US964784
申请日：1992-10-22
CPC分类号： G11B7/0946
摘要： The temperature around the tracking actuator is detected with a temperature sensor, and the characteristics of an equivalent digital filter are changed to match the characteristics of the tracking actuator at the detected temperature. When the temperature is low, a current is applied to the focus control coil to raise the temperature of the tracking actuator, thereby essentially matching the transfer functions of the tracking actuator and the equivalent filter.
摘要翻译： 利用温度传感器检测跟踪致动器周围的温度，改变等效数字滤波器的特性，使其与检测温度下跟踪致动器的特性相匹配。 当温度低时，向聚焦控制线圈施加电流以升高跟踪致动器的温度，从而基本上匹配跟踪致动器和等效过滤器的传递函数。
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公开(公告)号：US5257250A
公开(公告)日：1993-10-26
申请号：US450992
申请日：1989-12-15
IPC分类号： G11B7/09 , G11B11/105 , G11B21/08 , G11B7/007
CPC分类号： G11B21/085 , G11B11/10565 , G11B11/10578 , G11B7/0938
摘要： A tracking control target position adjusting track is provided on a recording carrier, where the track contains a preliminarily recorded first position-adjusting signal adjoining one side of track and a second position-adjusting signal adjoining the other side of track. While the reproduction position set on the target-position adjusting track, the tracking control apparatus adjusts the tracking-control target position based on reproduced first and second position-adjusting signals. As a result, the tracking control apparatus can precisely adjust the tracking control target position, thus providing quite satisfactory interchangeability with the corresponding apparatuses.
摘要翻译： 跟踪控制目标位置调整轨迹设置在记录载体上，其中轨道包含预先记录的与轨道一侧相邻的第一位置调整信号和与轨道另一侧相邻的第二位置调节信号。 当在目标位置调整轨道上设置再现位置时，跟踪控制装置基于重放的第一和第二位置调整信号来调整跟踪控制目标位置。 结果，跟踪控制装置可以精确地调整跟踪控制目标位置，从而与相应的装置提供相当满意的可互换性。
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公开(公告)号：US5191566A
公开(公告)日：1993-03-02
申请号：US486845
申请日：1990-03-01
CPC分类号： G11B7/08529 , G11B21/085
摘要： A velocity detection method and an apparatus therefor, in which the relative velocity between a light beam and tracks is detected on the basis of a period for which the light beam crosses the tracks, and under the condition that the light beam has passed by a predetermined position on the way to the target track, the detected relative velocity is compared with a predetermined velocity value so that when the detected relative velocity is larger than the predetermined velocity value the detected relative velocity is invalidated on the assumption that erroneous detection is generated by noise.
摘要翻译： 一种速度检测方法及其装置，其中基于光束穿过轨道的周期，并且在光束已经经过预定的条件的条件下，检测光束和轨迹之间的相对速度 位置，将检测到的相对速度与预定速度值进行比较，使得当检测到的相对速度大于预定速度值时，假设检测到的相对速度由噪声产生错误检测，则无效 。
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公开(公告)号：US4807206A
公开(公告)日：1989-02-21
申请号：US2069
申请日：1987-01-12
CPC分类号： G11B7/0946 , G11B7/0901 , G11B7/0948 , Y10S358/907
摘要： A system for recording or reproducing a signal by focusing and irradiating a light beam on a record carrier from a light source while controlling the light beam to always scan the track on the record carrier is disclosed. A track jump that may occur during recording or reproducing a signal on the record carrier is accurately detected. The reliability of the system is thus improved in such a way as to take appropriate action in case of a track jump.
摘要翻译： 公开了一种通过在控制光束始终扫描记录载体上的轨道的同时聚焦和照射来自光源的记录载体上的光束来记录或再现信号的系统。 准确地检测在记录或再现记录载体上的信号时可能发生的轨迹跳跃。 因此，系统的可靠性得到改善，以便在轨道跳跃的情况下采取适当的动作。
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7.发明授权Recording and reproduction apparatus having improved reliability with respect to externally applied vibration or impact 失效记录和再现装置相对于外部施加的振动或冲击具有改进的可靠性
公开(公告)号：US4692915A
公开(公告)日：1987-09-08
申请号：US738464
申请日：1985-05-28
IPC分类号： G11B15/02 , G11B7/00 , G11B7/004 , G11B7/09 , G11B19/04 , G11B21/10 , G11B33/08 , G11B33/10 , G11B27/36
CPC分类号： G11B19/04 , G11B33/08 , G11B33/10 , G11B7/0946
摘要： A recording and reproduction apparatus for recording signals on a recording medium or reproducing signals recorded on the recording medium, which is so arranged that, with acceleration detectors being provided for detecting accelerations of the apparatus by vibrations or impacts applied from outside, signals from the acceleration detectors are applied to control section for stabilization of the control system and also, for proper treatment upon application of excessively large external vibrations or impacts, with consequent improvements of reliability and stability of the apparatus.
摘要翻译： 一种用于在记录介质上记录信号或再现记录在记录介质上的信号的记录和再现设备，其被设置成使得利用加速度检测器用于通过来自外部的振动或冲击检测设备的加速度，来自加速度的信号 检测器被应用于控制部分以用于控制系统的稳定化，并且在施加过大的外部振动或冲击时进行适当的处理，从而提高了设备的可靠性和稳定性。
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8.发明授权Method for detecting the movement of a light beam and optical information reproduction apparatus using the same 失效用于检测光束的移动的方法和使用其的光学信息再现装置
公开(公告)号：US5671200A
公开(公告)日：1997-09-23
申请号：US512190
申请日：1995-08-07
CPC分类号： G11B19/20 , G11B7/08541 , G11B7/0901 , G11B7/08529 , G11B7/0943
摘要： An optical information reproduction apparatus for reproducing information from a disc having a plurality of tracks storing the information in the form of pits includes a radiation device for radiating a light beam toward the disc to form a light spot on the disc; a moving device for moving the radiation device to move the light spot in a direction crossing the plurality of tracks in a radial direction of the disc; a photodetector having a detecting plane for receiving the light beam reflected by the disc, the detecting plane being divided into four detection areas at least in a direction parallel to a tangent of the tracks and in a direction perpendicular to the tangent of the tracks, the four detection areas generating light intensity signals corresponding to the intensities of the light beam which is received; a positional offset detector for detecting a positional offset of the light spot with respect to one of the tracks based on the light intensity signals generated by the photodetector and outputting the detection result as a positional offset signal; a signal processor for performing processing of the light intensity signals including logic operation to obtain an operation signal; and a direction detector for detecting a direction in which the light spot moves with respect to a target track based on the positional offset signal and the operation signal during the movement of the light spot toward the target track.
摘要翻译： 用于从具有以凹坑形式存储信息的多个轨道的盘再现信息的光学信息再现装置包括：用于向盘辐射光束以在盘上形成光斑的辐射装置; 移动装置，用于使所述辐射装置移动以沿所述盘的径向与所述多个轨道交叉的方向移动所述光点; 具有用于接收由盘反射的光束的检测面的光电检测器，检测平面至少在与轨道的切线平行的方向上并且沿垂直于轨道的切线的方向分成四个检测区域， 四个检测区域产生与所接收的光束的强度对应的光强度信号; 位置偏移检测器，用于基于由光电检测器产生的光强度信号来检测光点相对于一个轨道的位置偏移，并输出检测结果作为位置偏移信号; 信号处理器，用于执行包括逻辑运算的光强度信号的处理以获得操作信号; 以及方向检测器，用于基于位置偏移信号和在光点向目标轨道移动期间的操作信号来检测光点相对于目标轨迹移动的方向。
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公开(公告)号：US5491676A
公开(公告)日：1996-02-13
申请号：US261088
申请日：1994-06-15
CPC分类号： G11B7/0946 , G11B7/08517
摘要： A tracking control apparatus having a track jump detection device and a memory for storing driving signals for the tracking control detects a track jump, and when such a track jump has occured, makes the tracking control inoperative, decelerates the velocity of light beam caused by the track jump by driving a voice coil motor using signals inverted from the signals stored in the memory, and, thereby, restarts the tracking control quickly.
摘要翻译： 具有轨道跳跃检测装置和用于存储用于跟踪控制的驱动信号的存储器的跟踪控制装置检测轨道跳跃，并且当发生这种轨道跳跃时，使得跟踪控制不起作用，从而减小由 通过使用从存储在存储器中的信号反转的信号来驱动音圈电机，从而快速重新启动跟踪控制。
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公开(公告)号：US5177719A
公开(公告)日：1993-01-05
申请号：US417426
申请日：1989-10-05
IPC分类号： G11B7/085
CPC分类号： G11B7/08529
摘要： A data-track accessing apparatus effectively eliminates external disturbance components from a track-deviation signal and correctly locates an objective track at an extremely fast speed. The apparatus includes an actuator which transfers a light beam in a direction of traversing tracks, a track-deviation detecting circuit which detects an amount of track deviation when the light beam traverses the tracks, a binary-coding circuit which converts the detected track-deviation signal into a binary-coded signal, an external-disturbance-component removal circuit which removes external disturbance components from the binary-coded track-deviation signal, and a speed-discriminating circuit which discriminates the moving speed of the light beam into multiple stages based on an output signal from the removal circuit.
摘要翻译： 数据轨道访问装置有效地从轨道偏差信号中消除了外部干扰分量，并以非常快的速度正确定位了物镜轨迹。 该装置包括沿横向方向传送光束的致动器，当光束穿过轨道时检测轨道偏离量的轨道偏差检测电路，将检测到的轨迹偏差转换成二进制编码电路的二进制编码电路 信号转换为二进制编码信号，外部干扰成分去除电路，从二进制编码的磁道偏差信号中除去外部干扰分量;以及鉴别电路，其将光束的移动速度基于多个阶段 来自去除电路的输出信号。
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