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21.发明授权Optical recording and/or reproducing apparatus with optical sensing of scanning mirror position 失效具有扫描镜位置的光学感测的光学记录和/或再现装置
公开(公告)号：US5245182A
公开(公告)日：1993-09-14
申请号：US841607
申请日：1992-02-25
IPC分类号： G11B7/09
CPC分类号： G11B7/0925
摘要： A polygonal scanning mirror for an optical recorder is magnetically suspended and rotated about a scanning axis. To control position of the scanning mirror, a curved surface mirror is fixed with respect to, and rotates with, the scanning mirror for receiving a radiation beam and reflecting it onto a detector array. The reflected radiation beam is preferably focused by an astigmatic imaging system. Output signals from the detector array are used to control electromagnets of the suspension system.
摘要翻译： 用于光学记录器的多边形扫描镜被磁悬浮并围绕扫描轴旋转。 为了控制扫描镜的位置，弯曲表面镜相对于用于接收辐射束并将其反射到检测器阵列上的扫描镜固定并旋转。 反射的辐射束优选地通过散光成像系统聚焦。 来自检测器阵列的输出信号用于控制悬架系统的电磁铁。
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公开(公告)号：US5117413A
公开(公告)日：1992-05-26
申请号：US260083
申请日：1988-10-19
CPC分类号： G11B7/08576
摘要： In order to pivot a pivotal arm (60) carrying an optical scanner (5), use is made of at least one coil (13) and at least one permanent magnet (16, 17), the coil being arranged on the pivotal arm or on a frame supporting the arm and the permanent magnet being arranged on the frame or on the arm. The coil (13) has a substantially straight active coil section (14) which is arranged near the pivotal axis (8) about which the pivotal arm is pivotable and which extends transversely of the longitudinal axis of the pivotal arm. The ends of this coil section are interconnected by a further coil section (15) which is, for example, concentric with the pivotal spindle and which extends at that side of the pivotal axis which is remote from the scanning unit.
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23.发明授权
公开(公告)号：US4972403A
公开(公告)日：1990-11-20
申请号：US318029
申请日：1989-03-02
IPC分类号： H04N5/85 , G11B7/00 , G11B7/004 , G11B7/007 , G11B7/013 , G11B7/08 , G11B7/09 , G11B7/14 , G11B7/24 , G11B27/026
CPC分类号： G11B7/24085 , G11B27/026 , G11B7/007 , G11B7/081 , G11B7/0903 , G11B7/0938 , G11B7/14 , G11B7/24
摘要： Disclosed is a system for optically recording information on a disc-shaped record carrier body along an information track, with the write spot being accurately guided in the radial and tangential directions. The record carrier body comprises a servo track formed by a constant and large number of servo areas per revolution of the servo track. In addition to a write spot, the write apparatus also projects a servo spot on the servo track. The tangential speed and the radial position of the servo spot relative to the servo track are determined from the modulated servo beam and used to correct the tangential speed and the radial position of the write spot, which is locked to the servo spot.
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公开(公告)号：US4747668A
公开(公告)日：1988-05-31
申请号：US889020
申请日：1986-07-24
申请人： Karl-Hanns Meyer , Wilhelmus A. H. Gijzen , Willy J. J. Aerts , Gerard E. Van Rosmalen , Leonhard Honds
发明人： Karl-Hanns Meyer , Wilhelmus A. H. Gijzen , Willy J. J. Aerts , Gerard E. Van Rosmalen , Leonhard Honds
CPC分类号： G11B7/0935
摘要： An optical scanning unit with an objective for focussing a beam into a scanning spot on the surface of an information carrier and an electromagnetic drive for continuous correction of the position of the objective with respect to the information carrier. The objective is mounted in a movable ring-shaped magnetic body of a permanent-magnetic material which is arranged coaxially about the optical axis and which has magnetic poles at the axial ends. The drive is provided with sets of fixed coils which interact with the magnetic body via an air gap. Each set of coils has a first segmental coil arrangement having two active coil parts extending parallel in the peripheral direction of the magnetic body and located in the vicinity of the axial ends of the centrally positioned magnetic body. The unit is further equipped with at least one second coil arrangement which is positioned at least partially between the active coil parts of the above-mentioned first segmental arrangement.
摘要翻译： 一种具有将光束聚焦到信息载体表面上的扫描点的光学扫描单元和用于相对于信息载体连续校正物镜位置的电磁驱动器。 该目的安装在永久磁性材料的可移动环形磁体中，该永久磁性材料绕光轴同轴布置并且在轴向端部具有磁极。 驱动器设有一组通过气隙与磁体相互作用的固定线圈。 每组线圈具有第一节段线圈装置，其具有两个在磁体的周向平行延伸并且位于中心定位的磁体的轴向端附近的有源线圈部分。 该单元还配备有至少一个第二线圈装置，其至少部分地位于上述第一分段装置的有效线圈部分之间。
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25.发明授权Apparatus for reading and/or writing an optically readable information structure 失效用于读取和/或写入光学可读信息结构的装置
公开(公告)号：US4423496A
公开(公告)日：1983-12-27
申请号：US214938
申请日：1980-12-10
CPC分类号： G11B7/0953 , G11B7/0904
摘要： An apparatus for reading and/or writing an optically readable information structure, arranged in information tracks, on a record carrier, comprises a beam deflection element which is controlled by a control signal obtained from a tracking servo system. The apparatus is provided with a position detection system for detecting the position of the deflection element, and the signal from this detection system is applied to an input of the servo system for generating a control signal which is independent of the position of the deflecting element.
摘要翻译： 用于读取和/或写入在记录载体上布置在信息轨道中的光学可读信息结构的装置包括由从跟踪伺服系统获得的控制信号控制的光束偏转元件。 该装置设置有用于检测偏转元件的位置的位置检测系统，并且来自该检测系统的信号被施加到伺服系统的输入端，用于产生独立于偏转元件的位置的控制信号。
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公开(公告)号：US4374324A
公开(公告)日：1983-02-15
申请号：US205554
申请日：1980-11-10
CPC分类号： G11B7/0917 , G11B7/0908 , G11B7/0956 , G11B2007/0924
摘要： In order to improve the focussing of radiation from a source onto an object, in example for a "VLP" or "Compact Disk" system, a further control signal from an object-inclination detector is added to the focussing error signal, yielding improved control stability and smaller focussing errors.
摘要翻译： 为了改善来自源到对象的辐射的聚焦，例如对于“VLP”或“光盘”系统，将来自物体倾斜检测器的另外的控制信号加到聚焦误差信号上，从而产生改善的控制 稳定性和较小的聚焦误差。
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27.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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公开(公告)号：US6130418A
公开(公告)日：2000-10-10
申请号：US122410
申请日：1998-07-24
CPC分类号： G11B7/1372 , G11B7/0956
摘要： An optical scanning device for scanning an optically readable record carrier (1) includes a radiation source (5), a radiation-sensitive detection system (7), and an optical scanning unit for focusing a scanning beam (3) produced by the radiation source to a scanning spot (9) on the record carrier. The scanning unit including a lens system having an optical axis (13), which lens system includes a first lens unit having a main lens (15) and a second lens unit having an auxiliary lens (17). The scanning device further includes a first detection unit involved in detection of the main lens with respect to the record carrier, and a second detection unit involved in detection of the auxiliary lens. The scanning unit further includes a first electrical drive unit for moving the first lens unit in dependence upon a signal supplied by the first detection unit, and a second electrical drive unit for moving the second lens unit with respect to the main lens in dependence upon a signal supplied by the second detection unit. The second drive unit includes a first part and a second part which cooperates with the first part via an air gap (51). The first part is secured to the first lens unit and the second part is secured to the second lens unit. In order to counteract spherical aberration and/or coma and/or astigmatism during scanning the second detection unit includes a position and orientation detector system for detecting the position and orientation of the auxiliary lens with respect to the record carrier during scanning.
摘要翻译： 用于扫描光学可读记录载体（1）的光学扫描装置包括辐射源（5），辐射敏感检测系统（7）和用于聚焦由辐射源产生的扫描光束（3）的光学扫描单元 到记录载体上的扫描点（9）。 扫描单元包括具有光轴（13）的透镜系统，该透镜系统包括具有主透镜（15）的第一透镜单元和具有辅助透镜（17）的第二透镜单元。 扫描装置还包括涉及主透镜相对于记录载体的检测的第一检测单元和涉及辅助透镜检测的第二检测单元。 扫描单元还包括用于根据由第一检测单元提供的信号移动第一透镜单元的第一电驱动单元和用于相对于主透镜相对于主透镜移动第二透镜单元的第二电驱动单元 信号由第二检测单元提供。 第二驱动单元包括通过气隙（51）与第一部件配合的第一部分和第二部分。 第一部分被固定到第一透镜单元，并且第二部分被固定到第二透镜单元。 为了在扫描期间抵消球面像差和/或彗形像差和/或散光，第二检测单元包括位置和方向检测器系统，用于在扫描期间检测辅助透镜相对于记录载体的位置和取向。
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公开(公告)号：US06118747A
公开(公告)日：2000-09-12
申请号：US6569
申请日：1998-01-13
CPC分类号： G11B7/1372 , G11B7/08582 , G11B7/0925
摘要： A scanning device for an optical disc record carrier includes a turntable and a positioning device which is movable relative to the turntable in a plane transverse to the axis of rotation thereof. The positioning device includes a radiation source unit and an actuator unit having a carrier which supports several different objective lenses and which is movable parallel to the access of rotation. The scanning device further includes actuating apparatus for moving the actuator unit and the radiation source unit relative to one another between discrete operating positions in at least the plane transverse to the axis of rotation, so as to place a respective lens in position for scanning a respective one of several different types of optical discs having mutually different substrate thicknesses and/or information densities.
摘要翻译： 用于光盘记录载体的扫描装置包括转台和定位装置，该转台和定位装置可在相对于转盘的旋转轴线的横截面中相对于转盘移动。 定位装置包括一个辐射源单元和一个具有载体的致动器单元，该载体支撑几个不同的物镜并且可平行于旋转通路移动。 扫描装置还包括致动装置，用于在至少垂直于旋转轴线的平面中的离散操作位置之间相对于彼此移动致动器单元和辐射源单元，以便将相应的透镜放置在适当位置，以扫描相应的 具有相互不同的衬底厚度和/或信息密度的几种不同类型的光盘中的一种。
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公开(公告)号：US5789852A
公开(公告)日：1998-08-04
申请号：US582813
申请日：1996-01-04
IPC分类号： H01J29/48 , H01S3/0959 , H01S5/30 , H01J29/46 , H01J29/50
CPC分类号： H01J29/488 , H01S3/0959 , H01J2229/4827 , H01S5/30
摘要： An electron-beam-pumped laser includes a cathode ray tube containing a laser crystal, an electron gun for producing an electron beam including a multi-element focusing electrode layer on an inner surface of the tube for effecting focusing of the beam on the laser crystal, and a multi-element deflection electrode layer on an inner surface of the tube for effecting scanning of the beam across the laser crystal. The laser crystal is disposed on a metal heat-conductive support which is adapted for accurately positioning the laser crystal in closely spaced relationship with respect to the electron gun and to a laser light emitting window of the tube.
摘要翻译： 电子束泵浦激光器包括含有激光晶体的阴极射线管，用于在管的内表面上产生包括多元素聚焦电极层的电子束的电子枪，用于将光束聚焦在激光晶体上 以及在管的内表面上的多元素偏转电极层，用于对激光晶体进行束的扫描。 激光晶体设置在金属导热支撑件上，金属导热支撑件适于将激光晶体相对于电子枪和管的激光发射窗口紧密地定位。
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