专利名称：Optical information recording medium
provided with visual watermark, apparatus
and method for making the visual
watermark
发明人：Hirofumi, Iwai, c/o Toshiba-Emi Limited
申请号：EP99122208.4
申请日：19991106
公开号：EP1079381A3哥伦比亚大学校徽
英语名言佳句公开日：
20010530
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香港中文大学录取分数线>三月 英文
专利附图：
pesaro摘要：This invention relates to an optical information recording medium provided with
a visual watermark comprising pits 5 in a form of a concave carrying information signals and lands 6 in a form of a convex, the pits and the lands being alternately formed in rows on the recording medium. There is provided an optical disk characterized in that in the land 6 between the adjacent pits 5 are formed recess 7 which are less deep than the pits, a group of the recess 7 reprenting a visual pattern. The prent invention can achieve an effect that the pits 5 of the recording signal and the recess 7 for the watermark can be formed at the same time by the same lar recording device.
申请人：Toshiba-Emi Limited
地址：2-17, Akasaka 2-chome Minato-ku, Tokyo 107-0052 JP
the lucky one国籍：JP
FALSE
bite怎么读代理机构：Kaminski, Susanne, Dr.
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