HIGH INDEX EDGE BLACKENING MATERIAL
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United States of America Patent
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Issued Date -
Jul 14, 2022
app pub date -
Jan 7, 2022
filing date -
Jan 8, 2021
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Abstract
Embodiments described herein include a waveguide combiner having an edge coated with an optically absorbent composition and a method of coating the edge of the waveguide combiner with the optically absorbent composition. The optically absorbent composition includes one or more types of nanoparticles or microparticles, at least one of one or more dyes or one or more pigments, and a polymer matrix of one or more binders. The method includes producing an optically absorbent formulation. The optically absorbent formulation includes one or more types of particles, at least one of one or more dyes or one or more pigments, one or more binders, and one or more solvents. The optically absorbent formulation is applied on an edge of a waveguide combiner using an edge blackening tool. The formulation is cured with radiation to form the optically absorbent composition.
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