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    • 63. 发明授权
    • Optical head
    • 光头
    • US4641023A
    • 1987-02-03
    • US671909
    • 1984-11-16
    • Hideo AndoAkihiko Doi
    • Hideo AndoAkihiko Doi
    • G11B7/085G11B7/09G11B7/135H01J3/14G02B7/02
    • G11B7/1381G11B7/08547G11B7/0908G11B7/0916
    • In an optical head, a semiconductor laser is supported on a base and the base is secured to a hollow frame. A lens-barrel for supporting collimator lens system is disposed in the hollow frame so that the collimator lens system is faced to the semiconductor laser. The frame and lens-barrel are secured in point contact securement to each other by studs screwed in dies provided on the frame. The base, lens-barrel and frame are made of materials having linear expansion coefficients satisfying either one of inequalities .alpha..gtoreq..gamma..gtoreq..beta. and .beta.>.gamma.>.alpha., where .alpha., .beta. and .gamma. are linear expansion coefficients of the base, frame and lens-barrel respectively.
    • 在光头中,半导体激光器被支撑在基座上,并且基座被固定到中空框架。 用于支撑准直透镜系统的镜筒设置在中空框架中,使准直透镜系统面对半导体激光器。 框架和镜筒通过拧在设置在框架上的模具中的螺柱彼此固定在一起。 基座,镜筒和框架由具有满足α,β,β>γ>α不等式的线性膨胀系数的材料制成,其中α,β和γ是基体的线膨胀系数 ,镜框和镜筒。
    • 64. 发明授权
    • Beam alignment system
    • 光束对准​​系统
    • US4621351A
    • 1986-11-04
    • US628684
    • 1984-07-06
    • James W. BaerHenry H. HoshikoRobert P. McIntoshCharles M. ReillyPaul M. RomanoJames W. Hargarten
    • James W. BaerHenry H. HoshikoRobert P. McIntoshCharles M. ReillyPaul M. RomanoJames W. Hargarten
    • G11B7/085G11B7/00
    • G11B7/08547
    • A beam alignment system and method for aligning a first radiation beam with respect to a second radiation beam as these beams share a desired optical path. Beam steering means, such as a galvonometer controlled mirror, steer the alignment of the first beam as it enters the shared optical path. Detection means are employed to sense the relative alignment between the first and second beams as they travel through the shared path. This sensed alignment is compared to a desired alignment, and a position error signal is generated to indicate the error therebetween. The position error signal, in turn, is used to steer the galvonometer controlled mirror in order to force the beam alignment error between the two beams to zero. In a preferred embodiment, the beam alignment system is used in an optical disk storage system to precisely position a write beam a desired distance from a read beam; thereby allowing a data track written with the write beam on a storage disk to be spaced a desired distance (the track pitch) from a previously written track that is being followed by the read beam.
    • 一种用于使第一辐射束相对于第二辐射束对准的光束对准系统和方法,因为这些光束共享期望的光路。 光束转向装置,例如电流计控制反射镜,当第一光束进入共享光路时,引导第一光束的对准。 当第一和第二光束穿过共享路径时,采用检测装置来感测第一和第二光束之间的相对对准。 将该检测到的对准与期望的对准进行比较,并且产生位置误差信号以指示它们之间的误差。 反过来,位置误差信号用于引导电流计控制镜,以迫使两束光束之间的光束对准误差为零。 在优选实施例中,光束对准系统用于光盘存储系统中以将写入光束精确地定位到读取光束所需的距离; 从而允许用存储盘上的写入光束写入的数据轨迹与预先写入的跟踪读取光束的轨迹间隔一个期望的距离(轨道间距)。
    • 65. 发明授权
    • Read beam position calibration
    • 读取光束位置校准
    • US4571714A
    • 1986-02-18
    • US628685
    • 1984-07-06
    • Harlan P. MathewsPaul RomanoAlexander M. Muckle
    • Harlan P. MathewsPaul RomanoAlexander M. Muckle
    • G11B7/013G11B7/085G11B7/09G11B23/36G11B7/00
    • G11B7/24085G11B23/36G11B7/08547G11B7/09G11B7/0903
    • A system and method for optically measuring and maintaining track pitch in an optical storage system. A set of at least four calibration tracks, each having a prescribed track pitch or distance therebetween, are precisely placed on a recording medium of the optical storage system during the manufacture thereof. When this recording medium is subsequently inserted into the optical storage system, the track pitch of a select pair of the calibration tracks is optically measured by maximizing the amplitude of a data read radiation beam, and an offset signal is generated in response to this measurement. This offset signal is used within the optical storage system for controllably positioning a second radiation beam with respect to a first radiation beam, the first radiation beam being directed to follow a previously written data track on the recording medium. The offset signal may be stored so that it need only be generated during an initialization or calibration mode of the optical storage system, and thereafter be readily available for positioning the second radiation beam relative to the first radiation beam. The select pair of calibration tracks may be an inner pair, having additional tracks adjacent both sides thereof, or an outer pair, having an additional track adjacent only one side thereof; thereby having included in the offset signal the optical effects of having additional data tracks adjacent or not adjacent the respective sides of the pair of calibration tracks whose track pitch is being measured.
    • 一种用于在光学存储系统中光学测量和维持光道间距的系统和方法。 在光学存储系统的制造期间,精确地将一组至少四个校准轨道(每个具有规定的轨距或距离)放置在光存储系统的记录介质上。 当该记录介质随后插入到光学存储系统中时,通过最大化数据读取辐射束的振幅来光学地测量选择的一对校准轨迹的轨道间距,并且响应于该测量产生偏移信号。 该偏移信号用于光学存储系统中,用于相对于第一辐射束可控地定位第二辐射束,第一辐射束被引导以跟随记录介质上的先前写入的数据轨道。 可以存储偏移信号,使得其仅需要在光学存储系统的初始化或校准模式期间产生,并且此后可以容易地用于相对于第一辐射束定位第二辐射束。 选择的一对校准轨道可以是内对,具有邻近其两侧的附加轨道或外对,具有仅与其一侧相邻的附加轨道; 从而在偏移信号中包括具有与正在测量其轨道间距的一对校准轨道的相应侧相邻或不相邻的附加数据轨迹的光学效果。
    • 70. 发明授权
    • Apparatus for creating a multi-dimensional data signal
    • 用于创建多维数据信号的装置
    • US07092344B2
    • 2006-08-15
    • US10731784
    • 2003-12-09
    • Robert G. McNiece
    • Robert G. McNiece
    • G11B7/00
    • G11B7/1353G11B7/08547G11B7/13G11B7/14
    • An optical disk drive (101) is disclosed which has essentially no seek time. The drive utilizes a Virtual Head (VH) (103) which is capable of accessing any and/or all tracks in an optical disk (111) at any time. The drive utilizes a procedure by which all of the tracks (208) in an optical disk are continuously mapped to a detector (121) space at all times, thus making data stored on the disk drive available almost instantaneously. The mapping of the optical disk tracks to the sensor space is direct in that it is predetermined and is an integral part of the driver software. The direct mapping makes it possible to use the least amount of computation time required to access any track. The technique is enabled by using a combination of a holographic lens element (125) with the detector. The technique and the components used in this device open the possibility for rapid data transfers using multidimensional data access.
    • 公开了一种基本上没有寻道时间的光盘驱动器(101)。 该驱动器利用虚拟头(VH)(103),其能够随时访问光盘(111)中的任何和/或所有轨道。 驱动器利用光盘中的所有轨道(208)始终连续地映射到检测器(121)空间的过程,从而使存储在磁盘驱动器上的数据几乎瞬时可用。 将光盘轨迹映射到传感器空间是直接的,因为它是预定的并且是驱动程序软件的组成部分。 直接映射使得可以使用访问任何轨道所需的最少计算时间。 该技术通过使用全息透镜元件(125)与检测器的组合来实现。 该设备中使用的技术和组件开放了使用多维数据访问进行快速数据传输的可能性。