发明名称 |
Identity card with grid images |
摘要 |
Disclosed is an identity card having grid images thereon comprised of a linear grid structure. In various embodiments, the grid depths of the individual grid images differ and can produce several different image colors. The card in a further embodiment can comprise a number of layers which are laminated together around a card core which has a window located therein. A number of variations of grid images can be included and/or superposed in the window in order to provide a security identification system which is extremely difficult to forge. Also disclosed are numerous combinations of grid structures some of which include grid images which may be absorption images and/or phase images.
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申请公布号 |
US4304809(A) |
申请公布日期 |
1981.12.08 |
申请号 |
US19790101182 |
申请日期 |
1979.10.07 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
MORAW, ROLAND;VON DEM BUSSCHE, GOETZ |
分类号 |
G03G15/22;B32B27/00;B42D15/10;G03H1/00;G06K19/16;(IPC1-7):B32B3/00 |
主分类号 |
G03G15/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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