Identification medium, code information reading method, code information reading device, identification medium manufacturing method, and identification medium manufacturing device

Provided is an identification medium which enables determination of authenticity in visual observation and is excellent in cost, reliability, and durability. An identification medium is characterized by comprising: a cholesteric liquid crystal layer (103) which has a property of selectively reflecti...

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Bibliographische Detailangaben
Hauptverfasser:	TAKEUCHI ITSUO, HOSHINO HIDEKAZU, SHIBUYA SEIYA, IDA TOHRU
Format:	Patent
Sprache:	eng
Schlagworte:	BOOK COVERS BOOKBINDING CALCULATING CHECKING-DEVICES COLOUR PRINTING COMPUTING COUNTING DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR FILES HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING HANDLING RECORD CARRIERS LINING MACHINES LOOSE LEAVES MOVABLE-STRIP WRITING OR READING APPARATUS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PERFORMING OPERATIONS PHYSICS PRESENTATION OF DATA PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES RECOGNITION OF DATA RECORD CARRIERS SPECIAL PRINTED MATTER STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	Provided is an identification medium which enables determination of authenticity in visual observation and is excellent in cost, reliability, and durability. An identification medium is characterized by comprising: a cholesteric liquid crystal layer (103) which has a property of selectively reflecting circularly polarized light of a first wavelength in a visible light band, and has been subjected to hologram processing (104); and a code-printed layer (102) in which code information formed by ink that absorbs or reflects infrared light of a wavelength different from the first wavelength is printed, the identification medium being characterized in that when viewed from the observation side, a region subjected to the hologram processing (104) and a region (102a) where the ink is printed of the code-printed layer (102) are located at positions at least partially overlapping each other.