Method of verifying the authenticity of a security

专利名称：Method of verifying the authenticity of a

security document and document for use insuch a method

发明人：Gerard Joseph Wilson,Paul Zientek申请号：US10833620申请日：20040428

公开号：US20040206920A1公开日：20041021

专利附图：

摘要：Method of verifying the authenticity of a security document (), the securitydocument including a first at least partially transparent portion () and an optical

projection element () within or superposed with the first at least partially transparentportion (), the optical projection element () acting to transform a light beam () passingfrom a light beam source through said first at least partially transparent portion () into apatterned beam () of selected design, the method including the steps of positioning thesecurity document such that the light beam is transmitted through the first at leastpartially transparent portion and the patterned beam is projected onto a viewing surface(), and verifying the presence of a patterned image by the impingement of the patternedbeam on the viewing surface ().

申请人：SECURENCY PTY LTD.

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