Thin film optical variable article having substantial color shift with angle and method
作者： Peter H. Berning , Roger W. Phillips
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摘要: Thin film optically variable article having substantial color shift with varying angle of light incidence and viewing including an thick, substantially transparent element carrying a colorant first second surfaces. A multilayer interference coating is carried on one said The serves to modify in essentially subtractive mode the at normal as seen by reflection or transmission.
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