Abstract: A mold release treatment method of the present invention includes: the step of providing a mold releasing agent and a mold which has a porous alumina layer over its surface, the mold releasing agent containing a fluoric compound which has mold releasability and a solvent; the step of applying over the surface of the mold a solvent that is capable of dissolving the fluoric compound; and thereafter, the step of applying the mold releasing agent over the surface of the mold according to a spray coating method. According to the present invention, a mold release treatment can be performed over a surface of the mold which has the porous alumina layer over its surface, without causing uneven application.

Abstract: A mold of an embodiment of the present invention has a surface that has a shape which is inverse of a surface shape of a moth-eye structure. This surface has a plurality of protrusions, a plurality of ridges extending between the plurality of protrusions via saddle portions, and a plurality of holes, each of which is defined by at least any three of the plurality of protrusions and ridges extending between the at least any three of the plurality of protrusions, and an average distance between centers of adjacent holes, p, and an average depth of the saddle portions, r, satisfy the relationship of 0.15?r/p?0.60.

Abstract: A moth-eye mold fabrication method of an embodiment of the present invention includes the steps of: (a) anodizing a surface of an aluminum film to form a porous alumina layer which has a plurality of minute recessed portions; (b) after step (a), bringing the porous alumina layer into contact with an etching solution, thereby enlarging the plurality of minute recessed portions of the porous alumina layer; and (c) after step (b), further anodizing the surface to grow the plurality of minute recessed portions, wherein a voltage applied in step (c) is higher than a voltage applied in step (a). According to an embodiment of the present invention, a mold fabrication method is provided which is capable of preventing formation of a plurality of tiny pores in one micropore.

Abstract: Disclosed is a tabular member that has an excellent low reflectivity and that can reduce coloring due to reflected light. In at least one example embodiment, specifically disclosed is a tabular member which comprises a base, a first antireflective film disposed on a surface of the base, and a second antireflective film disposed on the other surface of the base. The first and second antireflective films each have a plurality of projections on the surface thereof, and the distances between the apexes of two adjacent projections are shorter than or equal to the wavelength of visible light. The light obtained by combining the light reflected from the surface of the first antireflective film and the light reflected from the surface of the second antireflective film together has flat wavelength dispersion within the range of visible light.

Abstract: An anodized layer formation method of an embodiment of the present invention includes the steps of: (a) providing an aluminum base which has a surface that is made of aluminum; (b) anodizing the surface to form a barrier-type alumina layer; and (c) after step (b), further anodizing the surface to form a porous alumina layer which has a plurality of minute recessed portions. According to an embodiment of the present invention, a method is provided that enables formation of a porous alumina layer which has an interpore distance of a desired magnitude with the use of an aluminum base which has a surface that is made of aluminum, irrespective of the surface form.

Abstract: Provided is a structure with an observation port. The structure with the observation port is provided with the observation port and an internal structure. The internal structure is located to the backside of the observation port and has a third reflection preventing film. The first reflection preventing film is a film that reduces reflected light by using light interference. Each of the second and third reflection preventing films has a surface comprising a plurality of convex portions, a distance between apexes of each adjacent two of which does not exceed the visible light wavelengths. Light obtained by combining light reflected by the surface of the first reflection preventing film, light reflected by the surface of the second reflection preventing film, and light reflected by the surface of the third reflection preventing film has a flat wavelength dispersion within the visible light range.

Abstract: Disclosed are: an optical film which has a moth eye structure; a method for producing the optical film; and a method for controlling the optical characteristics of the optical film. An embodiment discloses an optical film having a moth eye structure that includes a plurality of projections, wherein the plurality of projections include a plurality of slanted projections that are inclined to a film surface and the plurality of slanted projections are inclined in a generally same direction when the film surface is viewed in plan. Also disclosed is a method for producing an optical film having a moth eye structure, including applying a physical force to the moth eye structure. Further specifically disclosed is a method for controlling the optical characteristics of an optical film having a moth eye structure that includes a plurality of projections, the method including applying a physical force to the moth eye structure.

Abstract: An antireflection film is provided in which a light scattering property is suppressed. In at least one example embodiment, the antireflection film includes, on a surface thereof, a moth-eye structure including a plurality of convex portions such that a width between vertices of adjacent convex portions is no greater than a wavelength of visible light. In at least one example embodiment of this antireflection film, the moth-eye structure does not include a sticking structure formed when tip end portions of the convex portions are joined to each other.

Abstract: An antireflection film is provided in which a light scattering property is suppressed. In at least one example embodiment, the antireflection film includes, on a surface thereof, a moth-eye structure including a plurality of convex portions such that a width between vertices of adjacent convex portions is no greater than a wavelength of visible light. In at least one example embodiment of this antireflection film, the moth-eye structure does not include a sticking structure formed when tip end portions of the convex portions are joined to each other.

Abstract: A display device and an optical film are disclosed which can protect the moth-eye structure while maintaining low reflectance. In at least one example embodiment, the present invention relates to a display device comprising an anti-reflection film including a moth-eye structure and a peelable protective film, wherein the protective film covers the moth-eye structure and is attached to a flat portion of the display device, the flat portion being flatter than the moth-eye structure. The flat portion suitably corresponds to the substrate and/or a region free of the moth-eye structure on the anti-reflection film, in a display panel.

Abstract: The present application aims to provide an antireflection film having low reflectivity and suppressing glare. In at least one example embodiment, the antireflection film includes a surface that includes a moth-eye structure including multiple projections. Apexes of any two adjacent projections are apart from each other by a distance not longer than a wavelength of visible light. The moth-eye structure has sticking structures each of which includes projections with tip portions of the projections adhering to each other. Each of the sticking structures is 0.05 ?m or greater and smaller than 1 ?m in diameter. The sticking structures exist at a number density in planar area of the antireflection film of 0.01 pcs/?m2 or more and less than 20 pcs/?m2.

Abstract: The present invention provides an anti-reflective film that prevents wavelength dispersion from being applied to light transmitted through an anti-reflective film. The present invention is an anti-reflective film, which reduces reflection of visible light on a surface of a substrate by being mounted on the substrate, has a wavelength dispersion structure for applying first wavelength dispersion to visible light transmitting through the anti-reflective film, and contains a wavelength dispersion material for applying second wavelength dispersion to the visible light transmitting through the anti-reflective film, wherein visible light transmitted through the anti-reflective film has flat transmission wavelength dispersion in a visible light region.

Abstract: A method is disclosed for efficiently producing a nanoimprint film with high-accurately formed nanostructures even if a base on which the nanoimprint film is formed is capable of absorbing UV light. The production method of at least one embodiment of the present invention is a production method of a nanoimprint film formed on a base, the nanoimprint film having a surface with nanosized protrusions and recesses formed thereon. In at least one embodiment, the production method includes a first step of applying a UV-curable resin on a base containing a UV-absorbing component to form a film; a second step of irradiating the film with UV light from a top-side surface of the film to form a semi-cured film; a third step of imprinting nanosized protrusions and recesses on the semi-cured film to form a film having a surface with protrusions and recesses formed thereon; and a fourth step of curing the film with protrusions and recesses to form a nanoimprint film.