ARTICLE COMPRISING A SEMI-REFLECTING MULTILAYER INTERFERENTIAL STRUCTURE

摘要

The article has juxtaposed semi-reflecting interferential multilayer structures (1) e.g. interference filters, for authentication of the article, and placed in its transparent central part (15). The structures are configured such that an observer perceives one color e.g. orange color, in reflection and another color e.g. blue color, in transmission, of the structures to evaluate authenticity of the article.