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SAFETY MARKING, MANUFACTURE THEREOF, MATTER HAVING SAFETY MARKING, AND EXAMINATION DEVICE FOR DETECTING REFLECTION ZONE OF SAFETY SYSTEM AND SAFETY MARKING
SAFETY MARKING, MANUFACTURE THEREOF, MATTER HAVING SAFETY MARKING, AND EXAMINATION DEVICE FOR DETECTING REFLECTION ZONE OF SAFETY SYSTEM AND SAFETY MARKING
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机译:安全标记,其制造,具有安全标记的事项以及用于检测安全系统和安全标记反射区的检查装置
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摘要
PROBLEM TO BE SOLVED: To improve a safety relative to forgery by rendering a safety marking undistinguishable with eye, and detecting characteristics of liquid crystal material having a chiral phase in use of a detection device. SOLUTION: As protection means from forgery done by the use of a color copying machine, an optically variable element is employed as a safety marking 5 in an information carrier. Namely, the safety marking 5 is undistinguishable with eye with the consequence that decision on truth or falsehood is done by detecting characteristics of liquid crystal material having a chiral phase by a detection device including a filter turret 6. Such a safety marking is formed by applying directly liquid crystal material to a carrier material or the like, which has a chiral phase with the side surface of a long wave of a reflection zone in the range of 200-420 nm, or the side surface of a short wave of a reflection zone in the liquid crystal material having a chiral phase in the range of 700-3000 nm.
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