Indelible watermark on optical discs
    2.
    发明公开
    Indelible watermark on optical discs 有权
    UnlöschbareMarkierung auf optischen Platten

    公开(公告)号:EP1219402A1

    公开(公告)日:2002-07-03

    申请号:EP01310895.6

    申请日:2001-12-27

    摘要: Light-readable information-recording media are fabricated according to a method wherein the back of a production stamper is laser-scribed, diamond-scribed, etched, or marked by other means to produce an image. This production stamper is then used to form a substantially transparent substrate having information recorded on it by means of pits and lands. During the formation of the substrate, the image is transferred from the back of the stamper to the surface of the substrate. The resulting watermark may be visible under normal light conditions. Information-recording media bearing indelible watermarks according to the present invention are also disclosed.

    摘要翻译: 根据一种方法制造光可读信息记录介质,其中生产压模的背面被激光划刻,金刚石刻划,蚀刻或用其他方式标记以产生图像。 然后将该生产压模用于形成具有通过凹坑和平台记录在其上的信息的基本透明的基板。 在形成衬底期间,将图像从压模的背面转移到衬底的表面。 所得到的水印在正常光线条件下可能是可见的。 还公开了根据本发明的具有不可擦除水印的信息记录介质。