SECURITY SUBSTRATES, SECURITY DEVICES AND METHODS

专利名称：SECURITY SUBSTRATES, SECURITY DEVICES

AND METHODS OF MANUFACTURETHEREOF

发明人：HOLMES, Brian William,SUYAL, Navin申请号：EP16741379.8申请日：20160711公开号：EP3319811B1公开日：20190828

摘要：A security substrate has: a polymer substrate having first and second surfaces;array of focussing elements; an optical adjustment layer and masking layer. The array isformed of a surface relief. The optical adjustment layer is on the transparent base layeracross a second region including the first. The optical adjustment layer has a first surfacecontacting the surface relief and an opposing second surface having a profile notoperative to focus visible light. The optical adjustment layer has a first transparentmaterial extending across a first sub-region of the array, the first transparent materialhaving a refractive index different from that of the transparent base layer. The securitysubstrate has a masking layer over the optical adjustment layer across a third region ofthe polymer substrate, the third region defining a gap in the masking layer(s), such thatfunctional focusing elements of the array are revealed through the gap.

代理机构：Gill Jennings & Every LLP

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