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公开(公告)号：US5825740A
公开(公告)日：1998-10-20
申请号：US888143
申请日：1997-07-03
IPC分类号： G11B7/085 , G02B26/12 , G11B7/0025 , G11B7/003 , G11B7/08 , G11B7/09 , G11B7/095 , G11B7/133 , G11B7/1362 , G11B7/00
CPC分类号： G11B7/1362 , G11B7/0025 , G11B7/003 , G11B7/08 , G11B7/0901 , G11B7/133
摘要： A device for electromagnetically scanning information tracks on a record carrier, such as an optical tape, via a scanning beam is described. On this tape, information tracks are arranged substantially parallel and substantially transverse to a transport direction of the record carrier. The device is provided with a scanning unit for scanning, with the beam always following parallel scanning paths, and a control system for controlling an angle of the scanning paths with respect to the transport direction, dependent on a tilt signal. According to the invention, the device is provided with angle-measuring means for generating the tilt signal dependent on a tracking error signal which is indicative of a difference between a scanning path and the relevant information track. In addition to a tilt signal, a speed signal may also be derived from the tracking error signal. Both the tilt signal and the speed signal are derived from the tracking error signal in a captured and in a non-captured state of operation.
摘要翻译： 描述了一种用于通过扫描光束在诸如光学带的记录载体上电磁扫描信息轨道的装置。 在该磁带上，信息轨迹基本上平行并且基本上横向于记录载体的输送方向。 该装置设置有用于扫描的扫描单元，其中光束始终遵循平行扫描路径，以及用于根据倾斜信号控制扫描路径相对于传送方向的角度的控制系统。 根据本发明，该装置设置有角度测量装置，用于根据指示扫描路径和相关信息轨道之间的差异的跟踪误差信号产生倾斜信号。 除了倾斜信号之外，还可以从跟踪误差信号导出速度信号。 在捕获的和未捕获的操作状态下，倾斜信号和速度信号都来自跟踪误差信号。
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2.发明授权
公开(公告)号：US5548114A
公开(公告)日：1996-08-20
申请号：US356949
申请日：1994-12-15
CPC分类号： G11B7/0903 , G11B7/003 , G11B7/0904
摘要： An optical scanning device for scanning a tape-like record carrier. The device includes an optical system for focusing a radiation beam at the record carrier, which radiation beam causes a scanning spot to occur on the record carrier. The device also includes a rotary polygon mirror which causes the scanning spot to be displaced transversely to the direction of the tape with a specific repetition rate. The tape-like record carrier is moved with a certain velocity in the longitudinal direction of the tape relative to the scanning device. In this manner, the record carrier is scanned in accordance with a track pattern formed by a longitudinal path of substantially parallel tracks which have a substantially constant track pitch and a track direction transverse to the longitudinal direction of the record carrier. During operation, vibrations occur which cause displacements to occur of the scanning spot over the recording layer transverse to the scanning direction. The relation between velocity and repetition rate is selected such that the amplitude of the displacements of the scanning spot, which displacements have a frequency exceeding the repetition rate, is smaller than the track pitch. As a result, the track pitch throughout the length of the tracks remains substantially constant without use of a controller.
摘要翻译： 一种用于扫描带状记录载体的光学扫描装置。 该装置包括用于将辐射束聚焦在记录载体处的光学系统，该辐射束使得记录载体上发生扫描点。 该装置还包括旋转多面反射镜，其使得扫描点以特定重复率横向于带的方向移位。 带状记录载体相对于扫描装置在带的长度方向上以一定的速度移动。 以这种方式，根据由具有基本上恒定的轨道间距和横向于记录载体的纵向方向的轨道方向的基本上平行的轨道的纵向路径形成的轨迹图案来扫描记录载体。 在操作过程中，发生振动发生在记录层上横扫扫描方向的扫描点的位移。 选择速度和重复率之间的关系，使得位移具有超过重复率的频率的扫描点的位移的幅度小于轨道间距。 结果，在使用控制器的情况下，在整个轨道长度上的轨道间距保持基本上恒定。
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公开(公告)号：US5661710A
公开(公告)日：1997-08-26
申请号：US530818
申请日：1995-09-20
IPC分类号： G11B5/008 , G11B5/012 , G11B7/00 , G11B7/003 , G11B7/007 , G11B7/085 , G11B7/09 , G11B7/24009 , G11B7/24082 , G11B11/105 , G11B15/18 , G11B20/12 , G11B3/74
CPC分类号： G11B5/012 , G11B11/10576 , G11B11/10584 , G11B11/10595 , G11B15/18 , G11B5/00813 , G11B7/003 , G11B7/007 , G11B7/09 , G11B7/24009 , G11B7/24082
摘要： A tape-like record carrier (109) is disclosed which comprises paths (A, B). Each path (A, B) contains substantially parallel tracks (1) the path width (1s) in length and the direction of the tracks is transverse to the longitudinal direction of the path (A, B). The diameters (10) of the paths have various directions. The ends of the paths (1) are overlapping. In these overlapping areas the tracks (1) belonging to the various paths are positioned in interlineated manner. Said record carrier (109) is advantageous in that no time is lost during recording or reading when a path is changed. Furthermore, a recording and reading device is disclosed which are applicable in combination with the record carrier.
摘要翻译： 公开了一种包含路径（A，B）的带状记录载体（109）。 每个路径（A，B）包含基本上平行的轨道（1），长度上的路径宽度（1s）和轨道的方向横向于路径（A，B）的纵向方向。 路径的直径（10）具有各种方向。 路径（1）的端部重叠。 在这些重叠区域中，属于各种路径的轨道（1）以相互排列的方式定位。 所述记录载体（109）的优点在于当路径改变时在记录或读取期间没有时间丢失。 此外，公开了可与记录载体组合使用的记录和读取装置。
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4.发明授权Device for realizing a longitudinal pattern of substantially parallel tracks in a record carrier which controls movement of the record carrier on the basis of trackpitch 失效用于在记录载体中实现基本上平行的轨道的纵向图案的装置，其基于轨道间距来控制记录载体的运动
公开(公告)号：US5581534A
公开(公告)日：1996-12-03
申请号：US352411
申请日：1994-12-08
CPC分类号： G11B7/003 , G11B7/0903 , G11B7/0904
摘要： An optical scanning device for realizing in a recording layer of an optical tape a longitudinal path (i.e. pattern) of substantially parallel tracks. The device includes an optical system for focusing a radiation beam at the recording layer, which radiation beam causes a scanning spot to develop on the recording layer. The tracks are formed by the optical tape being cyclically scanned, through use of a polygon mirror, via the scanning spot and displaced relative to the optical system in a direction transverse to the scanning direction. The device further includes an optoelectrical measuring unit for deriving a measuring signal indicative of the track pitch of the successively produced tracks. The velocity of the displacement of the optical tape is controlled as a function of the measuring signal.
摘要翻译： 一种光学扫描装置，用于在光带的记录层中实现基本上平行的轨迹的纵向路径（即，图案）。 该装置包括用于将辐射束聚焦在记录层的光学系统，该辐射束使扫描点在记录层上显影。 轨道由通过使用多面镜经由扫描点循环地扫描的光带形成，并且在垂直于扫描方向的方向上相对于光学系统移位。 该装置还包括光电测量单元，用于导出指示相继产生的轨道的轨道间距的测量信号。 根据测量信号控制光带的位移速度。
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5.发明授权公开(公告)号：US06262953B1
公开(公告)日：2001-07-17
申请号：US09167703
申请日：1998-10-06
IPC分类号： G11B709
CPC分类号： B82Y10/00 , G11B7/0914 , G11B7/122
摘要： An optical disk drive for reading and/or writing information from/on an optical disk includes an auxiliary lens to compensate for optical aberrations and a servo loop for positioning the auxiliary lens relative to a main lens. The servo loop includes an actuator for driving the auxiliary lens and a controller to feed the actuator coil with a drive current dependent on a position signal which is derived from the actual inductance of the actuator coil and a reference signal which indicates a desired position of the scan element. The disk drive also includes an inductance influencing device to vary the inductance of the actuator coil as a function of the position of the scan element.
摘要翻译： 用于从光盘读取和/或写入信息的光盘驱动器包括用于补偿光学像差的辅助透镜和用于相对于主透镜定位辅助透镜的伺服环路。 伺服回路包括用于驱动辅助透镜的致动器和控制器，用于将驱动电流馈送到驱动电流，该驱动电流取决于从致动器线圈的实际电感导出的位置信号，以及指示所述致动器线圈的期望位置的参考信号 扫描元件。 磁盘驱动器还包括电感影响装置，以根据扫描元件的位置改变致动器线圈的电感。
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6.发明授权A scanning device producing a first and a second scanning spot which move in different directions and an apparatus containing that device which uses the first spot for reading and/or recording and the second spot to monitor such reading and/or recording 失效产生沿不同方向移动的第一扫描点和第二扫描点的扫描装置以及包含使用第一斑点进行读取和/或记录的装置的装置以及第二斑点来监视这种读取和/或记录
公开(公告)号：US5633851A
公开(公告)日：1997-05-27
申请号：US248946
申请日：1994-05-25
IPC分类号： G02B26/10 , G02B26/12 , G11B7/00 , G11B7/003 , G11B7/0045 , G11B7/085 , G11B7/09 , G11B11/10 , G11B11/105 , H01J3/14 , G11B7/20
CPC分类号： G11B7/003 , G11B7/0903 , G11B7/0904
摘要： A scanning device for repeatedly scanning a scanning surface of a record carrier (e.g., a tape) by means of a first and a second scanning spot produced by respective scanning beams. The scanning spots perform synchronous movements along a first and a second scanning path, respectively, having different given scanning directions, as a result of which, the distance, viewed in a direction transverse to the scanning paths, between the first and the second scanning spot changes during scanning. The scanning device can be used in a recording and/or read apparatus which further includes a detection system for converting radiation emanating from the second scanning spot into a corresponding detection signal, and a measurement circuit which derives a position measurement signal indicative of deviation of track pitch based on a deviation in a relationship between the detection signal and a reference signal indicative of the position of the first scanning spot on the first scanning path. Other circuits can also be employed to derive a speed measurement signal indicative of the speed of the first scanning spot in a direction transverse to the track direction and a quality measurement signal indicative of the quality of an information pattern at the location of tracks traversed by the second scanning spot. If during reading a third scanning spot is used such that the second and the third scanning spot are always disposed symmetrically relative to the first scanning spot, corresponding detection signals can be obtained which can be used for deriving an inclination measurement signal indicative of the angle between the track direction and the first scanning path.
摘要翻译： 一种用于通过由各个扫描光束产生的第一和第二扫描点重复扫描记录载体（例如，带）的扫描表面的扫描装置。 扫描点分别沿着具有不同的给定扫描方向的第一扫描路径和第二扫描路径执行同步移动，其结果是在垂直于扫描路径的方向上在第一和第二扫描点之间的距离 扫描时发生变化 扫描装置可以用在记录和/或读取装置中，该记录和/或读取装置还包括用于将从第二扫描点发射的辐射转换成相应的检测信号的检测系统，以及导出指示轨迹偏移的位置测量信号的测量电路 基于检测信号和表示第一扫描路径上的第一扫描点的位置的参考信号之间的关系的偏差的间距。 还可以采用其它电路来导出指示横向于轨道方向的方向上的第一扫描点的速度的速度测量信号，以及指示在由轨道方向穿过的轨道的位置处的信息模式的质量的质量测量信号 第二扫描点。 如果在读取期间使用第三扫描点，使得第二和第三扫描点总是相对于第一扫描点对称地设置，则可以获得相应的检测信号，其可以用于导出指示第二扫描点和第三扫描点之间的角度的倾斜测量信号 轨道方向和第一扫描路径。
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7.发明授权Device for recording and/or reading information by means of a radiation beam, plate-shaped element suitable for use in the device, and disc player comprising the device 失效用于通过辐射束，适于在该装置中使用的板状元件记录和/或读取信息的装置，以及包括该装置的盘播放器
公开(公告)号：US5612945A
公开(公告)日：1997-03-18
申请号：US186399
申请日：1994-01-25
CPC分类号： G11B7/22 , G11B7/08582
摘要： An optical scanner for a disc placed on a turntable, having a scanning device mounted on a slide which is movable radially with respect to the turntable. The slide includes a body made of two thin plates which are parallel to each other and the direction of movement. The plates have patterns of raised portions which face each other. The plates are fixed to each other at locations where the raised portions contact each other.
摘要翻译： 一种用于放置在转台上的盘的光学扫描器，其具有安装在滑块上的扫描装置，其可相对于转台径向移动。 滑动件包括由彼此平行的两个薄板制成的主体和运动方向。 板具有彼此面对的凸起部分的图案。 这些板在凸起部分彼此接触的位置彼此固定。
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公开(公告)号：US5289442A
公开(公告)日：1994-02-22
申请号：US969918
申请日：1992-11-02
CPC分类号： G11B7/08564 , G11B7/08582
摘要： A device for optically scanning a surface (2) with a focal spot (11) formed by an objective lens (10). The objective lens is electromagnetically suspended in a stationary coil system (14) comprising a plurality of coil pairs located one behind the other in a given direction. The coil system can move the objective lens in five or six degrees of freedom. A radiation beam is displaced parallel to itself via a pivotal mirror (22) and a scanning lens (23) so as to track the movement of the objective lens in said direction. A communicator (96) drives only those coils of the coil system which are proximate to the objective system at a given moment.
摘要翻译： 一种用由物镜（10）形成的焦点（11）来光学扫描表面（2）的装置。 物镜被电磁悬挂在固定线圈系统（14）中，该固定线圈系统（14）包括在给定方向上一个接一个地定位的多个线圈对。 线圈系统可以以五或六个自由度移动物镜。 辐射束经由枢转反射镜（22）和扫描透镜（23）平行于其自身移位，以便沿着所述方向跟踪物镜的移动。 通信器（96）仅在给定时刻仅驱动线圈系统的接近物镜系统的线圈。
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公开(公告)号：US5014254A
公开(公告)日：1991-05-07
申请号：US285184
申请日：1988-12-15
IPC分类号： G11B11/10 , G11B11/105
CPC分类号： G11B11/10521 , G11B11/10513 , G11B11/1053 , G11B11/10536 , G11B11/10554 , G11B11/10576
摘要： A method and apparatus are revealed for recording information on a record carrier (1) having a magneto-optical recording layer (2), a pattern of magnetic domains (23, 24) having a first and a second direction of magnetization being formed in the recording layer (2). In accordance with the method, areas (22) of the recording layer are heated by the radiation pulses (20). The heated areas (22) are magnetized by means of a coil (12) which is energized with energizing-current pulses (21) which lag the radiation pulses (20) to such an extent that cooling of the areas (22) takes place substantially during the generation of the energizing pulses (12).
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公开(公告)号：US4773055A
公开(公告)日：1988-09-20
申请号：US119306
申请日：1987-11-06
CPC分类号： G11B7/0956 , G11B7/0925
摘要： An electro-optical apparatus comprising an objective (7) scans an optical disc (3) having a transparent protective layer (5) by means of a radiation beam (10) which, through the transparent layer, is focussed on a reflecting recording surface (4). The objective moves along the optical axis (19) for focussing the radiation beam on the recording layer and moreover performs limited pivotal movements. The position of the optical axis of the objective is corrected for obliquity of the surface of the optical disc, correction means (22A, B) being provided to tilt the objective through a correction angle, so that the angle between the optical axis and the normal to the disc surface is reduced.
摘要翻译： 一种电光设备，包括物镜（7）借助于辐射束（10）扫描具有透明保护层（5）的光盘（3），所述辐射束（10）通过所述透明层聚焦在反射记录表面 4）。 物镜沿着光轴（19）移动，用于将辐射束聚焦在记录层上，而且进行有限的枢转运动。 物镜的光轴的位置被校正为光盘的表面的倾斜度，校正装置（22A，B）被设置成通过校正角度倾斜物镜，使得光轴和法线之间的角度 到盘面减少。
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