Optical device with reflective multicolored and emissive images
OwnerYingqiu Jiang, Aharon Hochbauminventors
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Abstract
The current invention relates to a patterned optical device comprises a patterned cholesteric liquid crystal polymer layer where different domains of the pattern reflect different colors and where luminescent molecules are embedded in a subset of said reflective domains or in a separate layer. The current invention also relates to an optical security device comprises overt reflective OVD images and covert luminescent images with multiple authentication levels including detection of polarized reflections and emissions.
Claims18
A patterned OVD and luminescent device comprises a substrate, a CLCP layer and an optional transparent top layer. Where the patterned CLCP layer reflects one circular polarization, and where its background domains reflect a first color and its image domains reflect a second color or multiple colors;
- and where a subset of the pattern's domains is embedded with one or more invisible luminescent dyes or pigments, part of which emit one or more partially polarized emission colors when illuminated with UV radiation.
A patterned OVD and luminescent device comprises a substrate, a first luminescent print or a patterned luminescent layer and a second patterned CLCP layer. Said luminescent component comprises a covert pattern of one or more invisible luminescent dyes or pigments and said second CLCP layer, reflecting one circular polarization, comprises an overt pattern of background domains reflecting a first color and image domains reflecting a second color or multiple colors;
- and said device emits partially polarized luminescent colors when illuminated with UV radiation.
Dependencies are inferred from the claim text.