Security marking authentication device

Security marking authentication device

  • CN 101,821,781 A
  • Filed: 10/09/2007
  • Published: 09/01/2010
  • Est. Priority Date: 10/09/2007
  • Status: Active Application
First Claim
Patent Images

1. one kind is used for the document or the article that comprise the circular polarization safety label are carried out the authenticate device that vision authenticates, described device comprises at least one light source and at least one circularly polarized filter, it is characterized in that a described device emission left side and right-hand circularly polarized light shine the described mark on the described document.

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