Sheet of colloidal crystals immobilized in resin, method of displaying structural color using same, method for detecting unevenness distribution or hardness distribution of subject using same, and structural color sheet

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United States of America Patent

PATENT NO 9970749
SERIAL NO

14910431

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Abstract

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Provided are: a sheet of colloidal crystals immobilized in resin exhibiting intense structural color, enabled to be observed easily from a squarely facing direction against a surface; and use thereof. The sheet of the present invention, assuming a direction perpendicular to part of a surface of a target area including partially the sheet surface is set as a specified axis, satisfies: (1) The target area includes plural inclined back-reflecting crystal-domains crystal domains having colloid particles immobilized in resin and including crystal lattice planes capable of Bragg-back reflecting at least some of components in a visible wavelength range of incident light having greater than 0 incident angle with the specified axis; and (2) By defining an azimuth angle around the specified axis, the inclined back-reflecting crystal-domains are so oriented that intensity of reflected light caused by Bragg back reflection varies depending on the azimuth angle of the incident light.

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Patent Owner(s)

Patent OwnerAddress
FUJI KAGAKU CORPORATIONOSAKA-SHI OSAKA 534-0024

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fudoji, Hiroshi Ibaraki, JP 9 8
Furumi, Seiichi Ibaraki, JP 7 52
Kawanaka, Satoshi Osaka, JP 12 72
Sawada, Tsutomu Ibaraki, JP 93 968
Uchida, Fumio Osaka, JP 30 196

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