Birefringent pattern builder and laminated structure material for preventing forgery
AssigneeFUJIFILM Corporation
InventorsHideki KANEIWA, Kouki Takahashi, Ichiro Amimori
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Abstract
A birefringent pattern builder, having an optically anisotropic layer containing a polymer having unreacted reactive groups, wherein the optically anisotropic layer is produced by a method containing the steps [1] and [2] in this order: [1] coating and drying a solution containing a liquid crystalline compound having at least two kinds of reactive groups; and [2] reacting one kind of the at least two kinds of reactive groups by applying heat or irradiating ionizing radiation.
Claims20
A birefringent pattern builder, comprising an optically anisotropic layer containing a polymer having unreacted reactive groups,
- wherein the optically anisotropic layer is produced by a method comprising at least steps [1] and [2] in this order:
- [1] coating and drying a solution containing a liquid crystalline compound having at least two kinds of reactive groups;
- and
- [2] reacting one kind of the at least two kinds of reactive groups by applying heat or irradiating ionizing radiation.
A laminated structure material, comprising:
- an optical stress-sensitive layer, and
- a patterned optically anisotropic layer containing regions having birefringence different from each other in a patterned manner.
Dependencies are inferred from the claim text.