3DAS: a 3-dimensional-structure authentication system

Author

Van Renesse, Rudolf L.

Author_Institution

TNO Inst. of Appl. Phys., Delft, Netherlands

fYear

1995

fDate

16-18 May 1995

Firstpage

45

Lastpage

49

Abstract

It has been argued that the degree of microstructural order of an optical security feature is an approximate measure of its practical value for document security. Examples of highly ordered structures are diffractive devices like holograms, kinograms and zero order devices as well as interference devices like multilayer thin films and liquid crystals. An entirely different type of security feature is the random device which combines a complete lack of structural order with a high degree of security. This paper surveys the polarity of ordered and random structures

Keywords

authorisation; computer-generated holography; holographic optical elements; holographic storage; liquid crystal devices; optical films; security of data; 3D structure authentication system; diffractive optical elements; document security; highly ordered structures; interference devices; kinograms; liquid crystals; microstructural order; multilayer thin films; optical security feature; polarity; random structures; security feature; structural order; zero order devices;

fLanguage

English

Publisher

iet

Conference_Titel

Security and Detection, 1995., European Convention on

Conference_Location

Brighton

Print_ISBN

0-85296-640-7

Type

conf

DOI

10.1049/cp:19950467

Filename

491537