DE2547768

A document such as an ID-card is provided with check markings comprising a material based upon rare earth metals and having the property that when excited by IR radiation it emits visible light. When checking the document, the document is irradiated with pulsed IR radiation, the occurrence of corres...

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Hauptverfasser:	MALMBERG, THOR ANDERS HELGE, STOCKHOLM, SE, SJOEQUIST, STIG ROLAND, VALLENTUNA, SE, HOEGBERG, KNUT GOERAN, HAESSELBY, SE
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING CHECKING-DEVICES COIN-FREED OR LIKE APPARATUS COMPUTING COUNTING DECORATIVE ARTS HANDLING RECORD CARRIERS PERFORMING OPERATIONS PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS SPECIAL DESIGNS OR PICTURES TRANSPORTING
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creator	MALMBERG, THOR ANDERS HELGE, STOCKHOLM, SE SJOEQUIST, STIG ROLAND, VALLENTUNA, SE HOEGBERG, KNUT GOERAN, HAESSELBY, SE
description	A document such as an ID-card is provided with check markings comprising a material based upon rare earth metals and having the property that when excited by IR radiation it emits visible light. When checking the document, the document is irradiated with pulsed IR radiation, the occurrence of corresponding visible light pulses originating from said material being detected. The visible light pulses have well defined rise and decay times dictated by the check material used, which fact is used to check that output pulses from the detector are the correct ones for indicating the genuiness of the document.
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When checking the document, the document is irradiated with pulsed IR radiation, the occurrence of corresponding visible light pulses originating from said material being detected. The visible light pulses have well defined rise and decay times dictated by the check material used, which fact is used to check that output pulses from the detector are the correct ones for indicating the genuiness of the document.</description><edition>4</edition><language>eng</language><subject>CALCULATING ; CHECKING-DEVICES ; COIN-FREED OR LIKE APPARATUS ; COMPUTING ; COUNTING ; DECORATIVE ARTS ; HANDLING RECORD CARRIERS ; PERFORMING OPERATIONS ; PHYSICS ; PRESENTATION OF DATA ; RECOGNITION OF DATA ; RECORD CARRIERS ; SPECIAL DESIGNS OR PICTURES ; TRANSPORTING</subject><creationdate>1986</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19860213&DB=EPODOC&CC=DE&NR=2547768C2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76418</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19860213&DB=EPODOC&CC=DE&NR=2547768C2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>MALMBERG, THOR ANDERS HELGE, STOCKHOLM, SE</creatorcontrib><creatorcontrib>SJOEQUIST, STIG ROLAND, VALLENTUNA, SE</creatorcontrib><creatorcontrib>HOEGBERG, KNUT GOERAN, HAESSELBY, SE</creatorcontrib><title>DE2547768</title><description>A document such as an ID-card is provided with check markings comprising a material based upon rare earth metals and having the property that when excited by IR radiation it emits visible light. When checking the document, the document is irradiated with pulsed IR radiation, the occurrence of corresponding visible light pulses originating from said material being detected. 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When checking the document, the document is irradiated with pulsed IR radiation, the occurrence of corresponding visible light pulses originating from said material being detected. The visible light pulses have well defined rise and decay times dictated by the check material used, which fact is used to check that output pulses from the detector are the correct ones for indicating the genuiness of the document.</abstract><edition>4</edition><oa>free_for_read</oa></addata></record>
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subjects	CALCULATING CHECKING-DEVICES COIN-FREED OR LIKE APPARATUS COMPUTING COUNTING DECORATIVE ARTS HANDLING RECORD CARRIERS PERFORMING OPERATIONS PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS SPECIAL DESIGNS OR PICTURES TRANSPORTING
title	DE2547768
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