Patterned birefringent product
AssigneeFUJIFILM Corporation
InventorsIchirou Amimori, Osamu Sawanobori, Kouki Takahashi, Satomi Suzuki, Masao Nakajima, Hideki Kaneiwa
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Abstract
A product comprising a patterned optically anisotropic layer having two or more regions of different birefringence in the form of a pattern, which further comprises a semi-transmissive-half-reflective layer having a transmittance of 30% or higher and a reflectance of 30% or higher is provided. The product permits visualization of a latent image in the product through a polarizing plate as well as visualization of the information on the side opposite to the side to be viewed from.
Claims18
A patterned birefringent product comprising a patterned optically anisotropic layer having two or more regions of different birefringence in the form of a pattern, which further comprises a semi-transmissive-half-reflective layer having a transmittance of 30% or higher and a reflectance of 30% or higher, and a protective layer with a refractive index of 1.4 to 1.7,
- wherein the product comprises the semi-transmissive-half-reflective layer, the patterned optically anisotropic layer, and the protective layer in this order,
- wherein the regions of different birefringence are regions of different retardation,
- wherein the thickness of the protective layer is in the range from 40 to 200 micrometers,
- wherein the semi-transmissive-half-reflective layer which has the transmittance of 30% or higher and the reflectance of 30% or higher is disposed only at one side of the patterned optically anisotropic layer, and
- wherein the patterned birefringent product permits the visual recognition of the birefringence pattern, through a polarizing plate or another device used for observation of the pattern, from the side of the protective layer.
Dependencies are inferred from the claim text.