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    Phase change record carries having crystalline nuclei and/or which produce crystallization structures when information is written thereon enabling that information to be more easily erased
    5.
    发明授权
    Phase change record carries having crystalline nuclei and/or which produce crystallization structures when information is written thereon enabling that information to be more easily erased 失效
    相变记录具有结晶核和/或当其上写入信息时产生结晶结构，使得能够更容易地擦除信息

    公开(公告)号：US5479392A

    公开(公告)日：1995-12-26

    申请号：US285834

    申请日：1994-08-04

    申请人： Antonius H. M. Holtslag ,  James H. Coombs ,  Wilma Van Es-Spiekman

    发明人： Antonius H. M. Holtslag ,  James H. Coombs ,  Wilma Van Es-Spiekman

    IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/006 ,  G11B7/125 ,  G11B7/30

    CPC分类号： G11B7/126 ,  G11B7/00557 ,  G11B7/006

    摘要： Information storage system, device and record carriers for improved erasing of information written on a record carrier. A radiation beam is focused on a recording layer of a record carrier containing phase-change material. Crystalline information areas are written on initially amorphous portions of the recording layer by means of the radiation beam having its intensity modulated in accordance with write pulses. The information areas are erased (and changed back into amorphous portions) by means of the radiation beam having its intensity modulated in accordance with erase pulses. The time duration of each of the erase pulses (and, therefore, the intensity of the radiation beam being modulated in accordance therewith to heat the recording layer) and the cooling time of the recording layer thereafter is short enough that areas of the recording layer which are heated during erasing to a temperature above the crystallization temperature of the recording layer but lower than the melting point of the recording layer remain above the crystallization temperature for a period of time which is shorter than the crystallization time for the recording layer. The recording layer may contain a track and have more crystallization nuclei proximate to a centerline of the track than away from the centerline. In addition, the record carrier may be such that its reflection is larger when the recording layer has an amorphous structure than when it has a crystalline structure.

    摘要翻译： 信息存储系统，设备和记录载体，用于改善擦写记录载体上的信息。 辐射束聚焦在包含相变材料的记录载体的记录层上。 结晶信息区域通过具有根据写入脉冲调制的强度的辐射束写在记录层的初始非晶体部分上。 信息区域通过具有根据擦除脉冲调制的强度的辐射束被擦除（并且变回非晶部分）。 擦除脉冲的持续时间（并且因此，根据其加热记录层的辐射束的强度）和其后的记录层的冷却时间足够短，使得记录层的区域 在擦除到高于记录层的结晶温度但低于记录层的熔点的温度的温度下被加热保持高于结晶温度超过记录层的结晶时间的时间段。 记录层可以包含轨道并且具有比远离中心线更靠近轨道的中心线的更多的结晶核。 此外，记录载体可以是当记录层具有非晶体结构时比其具有晶体结构时的反射更大。

    Optical scanning device
    6.
    发明授权
    Optical scanning device 失效
    光学扫描装置

    公开(公告)号：US06256285B1

    公开(公告)日：2001-07-03

    申请号：US09184532

    申请日：1998-11-02

    申请人： James H. Coombs

    发明人： James H. Coombs

    IPC分类号： G11B700

    CPC分类号： G11B7/131 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0912 ,  G11B7/1353 ,  G11B2007/0013

    摘要： An optical scanning device is described which can scan a record carrier by a radiation beam. A dividing element directs radiation reflected from the record carrier to a detection system. The detection system includes at least three detectors. The dividing element has at least three gratings, each forming a sub-beam directed to one of the detectors. The longest dimension of each detector is substantially perpendicular to the bisector of the appertaining sector.

    摘要翻译： 描述了可以通过辐射束扫描记录载体的光学扫描装置。 分离元件将从记录载体反射的辐射引导到检测系统。 检测系统包括至少三个检测器。 分隔元件具有至少三个光栅，每个光栅形成指向一个检测器的子光束。 每个检测器的最长尺寸基本上垂直于相应扇区的平分线。

    Information reading system and record carrier and reading device for use in such a system
    7.
    发明授权
    Information reading system and record carrier and reading device for use in such a system 失效
    信息读取系统和记录载体和读取装置，用于这种系统

    公开(公告)号：US5255263A

    公开(公告)日：1993-10-19

    申请号：US845289

    申请日：1992-03-03

    申请人： Cornelis M. J. Van Uijen ,  Yvonne A. Boersma ,  James H. Coombs

    发明人： Cornelis M. J. Van Uijen ,  Yvonne A. Boersma ,  James H. Coombs

    IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/095 ,  G11B7/14 ,  G11B11/105 ,  G11B21/00 ,  G11B5/84

    CPC分类号： G11B7/24085 ,  G11B11/10515 ,  G11B7/005 ,  G11B7/14 ,  G11B7/24088

    摘要： The disclosed information reading system comprises a record carrier (1) having at least two parallel tracks (2a, 2b) whose mutual distance is so small that the radiation beam (10) is modulated by the information patterns of the two tracks (2a, 2b) when the tracks are scanned by a focused radiation beam (10) along a line (18) indicating the center between the tracks (2a, 2b). The tracks comprise elementary areas, with the positions of the boundaries (80) of the elementary areas of the two tracks, viewed in the track direction, corresponding to each other. The information patterns in the tracks comprise elementary areas occupied by a mark and unoccupied elementary areas. The occupied elementary areas have a different influence on the radiation than the unoccupied elementary areas. When the two tracks (2a, 2b) are scanned, the center (17) of the scanning spot (14) is directed onto a line (18) which is located centrally between the tracks (2a, 2b). A radiation beam modulated by the scanned information pattern is projected onto a detection system (12). The information (I1, I2, I) which has been read is at least partly derived on the basis of one or more detection signals (Vt, Vppr, Vppt, Vppd) which are supplied by the detection system (12) at the instants when the radiation beam passes the boundaries (80) of the elementary areas.