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    • 21. 发明授权
    • Method of effecting erasure of optical information media including
varying duty cycle, laser power and focus offset
    • 影响光信息介质擦除的方法,包括变化的占空比,激光功率和聚焦偏移
    • US4949329A
    • 1990-08-14
    • US300861
    • 1988-04-27
    • Steven R. FurmanJames E. Kuder
    • Steven R. FurmanJames E. Kuder
    • G11B7/0055
    • G11B7/0055
    • Provided is a process for the erasure of information recorded in an optical information medium. The erasure is effected by irradiating the medium with a laser beam, with the duty cycle, laser power and focus offset having been adjusted from that used during writing such that upon the irradiation complete and clean erasure of the information is effected. It is preferred that the focus offset and laser power are adjusted the minimal amount possible and that the duty cycle is the parameter of the three for which the greatest adjustment is made. Control and adjustment of the three parameters in accordance with the present invention permits one to realize more accurate, efficient and clean erasure, even bit-by-bit erasure if desired, than has heretofore been possible.
    • 提供了擦除记录在光信息介质中的信息的处理。 通过用激光束照射介质来实现擦除,其中占空比,激光功率和聚焦偏移已经被调整到在写入期间所使用的位置,使得在照射完成并清洁擦除信息时。 优选的是,将焦点偏移和激光功率调整到可能的最小量,并且占空比是进行最大调整的三个参数。 根据本发明的三个参数的控制和调整允许如前所述可以实现更精确,高效和清洁的擦除,如果需要的话,逐位删除。
    • 23. 发明授权
    • Recording medium comprising a microporous polymer exhibiting enhanced
signal to noise ratio
    • 包含显示增强的信噪比的微孔聚合物的记录介质
    • US4636804A
    • 1987-01-13
    • US690703
    • 1985-01-11
    • James E. Kuder
    • James E. Kuder
    • G11B7/251G11B7/253G01D15/14
    • G11B7/251G11B7/253Y10S430/146Y10S430/165Y10T428/249978Y10T428/249987
    • Provided is an archival recording medium and a method for recording information on same. The recording medium comprises a coated microporous polymeric layer and an energy absorbing material, e.g., a layer of an energy-absorbing material such as a metal or dye/polymer layer deposited on the microporous layer. The coating on the microporous film layer is a polymeric coating, which polymer is of sufficient molecular size or branching to preclude entry of the polymer molecules into the pores of the microporous polymer film. If desired, further dimensional stability and mechanical strength can be provided to the recording medium by a thermally stable substrate or by tensioning the medium within a rigid frame.Information is recorded by the energy-absorbing material heating up in localized irradiated regions and causing the controlled collapse of the microporous structure in the microporous polymer layer. The collapsed portions of the structure constitute the information which can then be read either by reflectance or transmission. Due to the polymeric coating, the recording medium exhibits an enhanced signal to noise ratio upon the reading of the recorded information.
    • 提供了一种档案记录介质和用于记录信息的方法。 记录介质包括涂覆的微孔聚合物层和能量吸收材料,例如沉积在微孔层上的能量吸收材料如金属或染料/聚合物层的层。 微孔膜层上的涂层是聚合物涂层,该聚合物具有足够的分子尺寸或分支,以防止聚合物分子进入微孔聚合物膜的孔。 如果需要,可以通过热稳定的基底或通过在刚性框架内张紧介质来向记录介质提供进一步的尺寸稳定性和机械强度。 通过在局部照射区域中加热的能量吸收材料记录信息,并导致微孔聚合物层中的微孔结构受到控制的崩溃。 结构的折叠部分构成了可以通过反射或透射来读取的信息。 由于聚合物涂层,记录介质在读取记录的信息时表现出增强的信噪比。