发明授权
- 专利标题: Information-recorded media and methods for reading the information
- 专利标题(中): 信息记录媒体和阅读信息的方法
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申请号: US97765申请日: 1993-07-26
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公开(公告)号: US5856048A公开(公告)日: 1999-01-05
- 发明人: Shigehiko Tahara , Shinichi Kurokawa , Norio Takahashi , Ryuji Horiguchi , Morito Sakai , Akira Hayakawa , Shinpei Komaki
- 申请人: Shigehiko Tahara , Shinichi Kurokawa , Norio Takahashi , Ryuji Horiguchi , Morito Sakai , Akira Hayakawa , Shinpei Komaki
- 申请人地址: JPX Tokyo
- 专利权人: Dai Nippon Printing Co., Ltd.
- 当前专利权人: Dai Nippon Printing Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX4-199481 19920727; JPX4-199771 19920727; JPX5-058019 19930224; JPX5-140310 19930611
- 主分类号: B41M3/14
- IPC分类号: B41M3/14 ; B42D15/00 ; G03H1/00 ; G03H1/02 ; G03H1/04 ; G03H1/24 ; G03H1/26 ; G06K19/06 ; G03H1/18
摘要:
The invention is directed to an information-recorded medium with easily selectable and identifiable items of information, which is virtually protected against forgery and has enhanced security against some improper use, and a method for reading such a medium. This information-recorded medium 1 includes a substrate 2 and a layer 3 with information recorded thereon by the printing of infrared absorbing ink, said layer 3 being provided on the surface of the layer 2. The printed layer 3 is provided thereon with a relief hologram-recorded layer 7 through an adhesive layer 4, said hologram-recorded layer 7 being built up of a reflecting layer 5 transparent to the infrared region and a relief hologram-formed layer 6 provided on the surface of the reflecting layer 5. For reading, the hologram-recorded layer 7 is reconstructed by visible light, while the printed layer is reconstructed by infrared light, and the medium 1 is identified on the basis of the thus reconstructed information.