High value documents
作者： Craig Harvey Nelson , Malcolm Robert Murray Knight , Sarah Anne Rocca , Robin Edward Godfrey , Roland Isherwood
DOI:
关键词:
摘要: A means of identification or document value which includes a paper polymer region, in particular, bank notes, passports, cards any other sufficient to make it liable be copied counterfeited, watermark the region and liquid crystal material applied at least part produce optical effects differ when viewed transmitted reflected light.
lens.org 参考文章(7)
Lester Weinberger, Authenticating and anti-counterfeiting device for currency ,(1982)
Wilbur I. Kaye, Marking and authenticating documents with liquid crystal materials ,(1982)
Gerhard Schwenk, Juergen Moll, Christoph Heckenkamp, Data carrier with a liquid crystal security element ,(1990)
David William Thomas, Max Thoma, Sheet with security device ,(1990)
Robert Sophia Pauwels, Leon Louis Vermeulen, Laminated article for identification purposes ,(1989)
Solomon David Henry, Brown Montague Frank William, Hamann Sefton Davidson, IMPROVEMENTS IN OR RELATING TO SECURITY TOKENS ,(1976)