Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 22, 2011
Patent Application Number
11738674
Date Filed
April 23, 2007
Patent Citations Received
Patent Primary Examiner
Patent abstract
An interference filter having a plurality of layers and a spectrum as a function of angle of observation is combined with a metameric element adjacent the interference filter and appearing to have a same color as the interference filter at at least one angle of observation and a contrasting color as said interference filter at least one other angle of observation. A plurality of interference filter layers, including a metallic layer, can be provided on a support structure for the layers. The support structure is then adapted to allow the layers to be seen from a top and a bottom side, with the layers being adapted to have different spectra as a function of angle of observation in reflection and transmission.
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