Invention Grant
US09561684B2 System and method for varying hologram visibility 有权
改变全息图可视性的系统和方法

System and method for varying hologram visibility
Abstract:
A system and method for varying hologram visibility is disclosed herein. Specifically the system can comprise a shield. The shield can comprise a first layer and a second layer. The first layer can comprise a photochromic material having a dark state and a light state. The second layer can comprise a hologram that is less visible the first layer is in the light state. The method can comprise attaching a second layer to a first layer. The first layer can comprise a photochromic material having a dark state and a light state. The second layer can comprise a hologram. The hologram can be less visible when the first layer is in the light state than when the first layer is in the dark state.
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