摘要:
An image capturing device includes a lens system including a plurality of regions on a pupil plane that each have different focal distances, a plurality of first polarizing elements that respectively transmit differently polarized light and respectively transmit light passing through the plurality of regions, a plurality of second polarizing elements that respectively transmit polarized light transmitted through the plurality of first polarizing elements, and a plurality of light receiving elements that respectively receive light transmitted through the plurality of second polarizing elements.
摘要:
A viewer for authenticating a birefringent pattern having at least two regions having a different birefringence from each other, wherein the viewer contains a polarizing plate and at least one optically anisotropic layer laminated on the polarizing plate, a front retardation of the at least one optically anisotropic layer is 5 nm or more and the total of the front retardation of the at least one optically anisotropic layer and a maximum value of front retardation of the birefringent pattern is greater than λ/2.
摘要:
A forgery-preventing foil having a latent image and a total thickness of 20 μm or less, containing at least one patterned optically anisotropic layer having two or more regions different in birefringence property, all of the regions in the same layer being formed of the same layer-forming composition.
摘要:
A process of producing a substrate for liquid crystal display device comprising an optically anisotropic layer, which comprises forming the optically anisotropic layer by a process comprising the following [1] to [3]:[1] preparing a substrate having a raw optically anisotropic layer; [2] subjecting the raw optically anisotropic layer to patterned exposures of two or more types having different exposure conditions to each other; [3] subjecting the substrate obtained after the exposure to a heat treatment at 80° C. or higher and 400° C. or lower. By the process, a substrate for liquid crystal display device which contribute to reducing viewing angle dependence of color of a liquid crystal display device can be easily produced.
摘要:
A production method of an optical film is provided including: a process of preparing a solution comprising polyvinyl alcohol or modified polyvinyl alcohol; a process of casting the solution by using a tapering die so as to prepare a film differing in thickness between the right side and the left side; and a process of stretching the film at a speed differing between the right side and the left side at an angle of 10 to 80 degrees with the machine direction.