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    • 14. 发明授权
    • Hologram erasing method and hologram erasing apparatus
    • 全息擦除方法和全息擦除装置
    • US07426168B2
    • 2008-09-16
    • US10782758
    • 2004-02-23
    • Katsunori KawanoJiro MinabeShin YasudaTatsuya MaruyamaNorie Matsui
    • Katsunori KawanoJiro MinabeShin YasudaTatsuya MaruyamaNorie Matsui
    • G11B7/00
    • G11B7/0055G11B7/0065
    • The present invention discloses a hologram erasing method, in which a predetermined hologram is erased by irradiating a predetermined region of a hologram recording medium in which the hologram to be erased is recorded with a reference light beam and a signal light beam holding a random data pattern at the same time. In this method, the signal light beam and the reference light beam interfere with each other in the medium, and a Fourier transform hologram recorded in the region where the interference occurs is destroyed and erased by interference light beam. That is, a data page for erasing including a random pattern is overwritten to erase an original data page. According to the present invention, the hologram recorded in the optical recording medium can be selectively and completely erased in a simple method.
    • 本发明公开了一种全息擦除方法,其中通过用参考光束照射其中记录要擦除的全息图的全息图记录介质的预定区域和保持随机数据图案的信号光束来擦除预定的全息图 与此同时。 在这种方法中,信号光束和参考光束在介质中彼此干涉,并且记录在发生干涉的区域中的傅立叶变换全息图被干涉光束破坏并被擦除。 也就是说,覆盖包括随机模式的用于擦除的数据页被覆盖以擦除原始数据页。 根据本发明,记录在光学记录介质中的全息图可以以简单的方法被选择性地和完全地擦除。