发明名称 Device for checking security elements
摘要 The invention relates to a device ( 20 ) and a method for making visible security elements present in an object ( 4 ) and comprising at least one photoluminescent segment which is characterized by linearly polarized photoluminescence and/or linearly polarized absorption. According to the invention, a good contrast is achieved with few interfering signals, by arranging at least one light source ( 1 ) and at least one polarization filter ( 2 ) in such a way that the light ( 24 ) from the light source ( 1 ) is linearly polarized ( 23 ) by means of the polarization filter ( 2 ) and hits the object ( 4 ) or the photoluminescent segments in said object, and photoluminescent light ( 25 ) from the segments can be observed through another and/or the same polarization filter ( 2 ).
申请公布号 US2005213078(A1) 申请公布日期 2005.09.29
申请号 US20040509735 申请日期 2004.09.30
申请人 LANDQART 发明人 GROB JAKOB;DOSTMANN ANDREAS;FRANKEN KLAUS
分类号 G07D7/12;(IPC1-7):G06K9/74 主分类号 G07D7/12
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