Abstract: Provided are a transparent member having excellent transparency and maintaining anti-fogging properties for a long period of time and a method for producing a transparent member. A transparent member includes a substrate and a stacked body having an organic layer and an inorganic porous layer stacked on the substrate in the mentioned order such that the both layers are in contact with each other, in which the organic layer includes an organic molecular chain network including an organic polymer chain and an organic crosslinking chain having 3 or more to 30 or less carbon atoms, and an acidic group aggregate, and in which the inorganic porous layer has hydrophilicity and includes silicon oxide.

Abstract: A light-transmitting member includes a substrate including a resin layer, and a functional film disposed on the substrate. The substrate has a thickness of 1 ?m or more and less than 1 mm. An optical thickness of the functional film with respect to light having a wavelength of 464 nm or more and 653 nm or less is less than a half of the wavelength. A contact angle of water with respect to an upper surface of the functional film in the light-transmitting member is less than 90°. The functional film has a porous portion containing a plurality of particles. A first particle and a second particle among the plurality of particles are bound to each other with a binder. Each of the first particle, the second particle, and the binder contains an inorganic material.

Abstract: The present disclosure provides a member having a porous layer containing particles and having a low refractive index and high film strength and a coating liquid for forming a porous layer containing particles, wherein the porous layer contains a plurality of silicon oxide particles bound by an inorganic binder and at least one acid.

Abstract: The present invention relates to an optical element including a base material, a light-shielding film, and a cured film in which an alkyd resin and a melamine resin having two or more iminomethylol groups in a molecule are condensed or in which an alkyd resin and a benzoguanamine resin having two or more iminomethylol groups in a molecule are condensed. The light-shielding film is disposed in at least a part of the periphery of the base material. The cured film is disposed on the surface of the light-shielding film.

Abstract: An optical member includes a base material and an antireflective layer on the base material wherein the antireflective layer includes a plurality of fine protrusions on a surface thereof and a support layer for supporting the protrusions, and the support layer contains boron in an amount of 7×1019 atoms/cm3 or more and 2.5×1020 atoms/cm3 or less.

Abstract: There is provided an optical member including a porous layer on a substrate, wherein the porous layer contains silicon oxide particles, a silicon oxide binder, and a fluorine compound having a fluorocarbon group and a nonionic hydrophilic group, and the amount of the fluorine compound is 0.1% by mass or more and 2.5% by mass or less with respect to the silicon oxide.

Abstract: An optical member includes a base material and an antireflective layer on the base material wherein the antireflective layer includes a plurality of fine protrusions on a surface thereof and a support layer for supporting the protrusions, and the support layer contains boron in an amount of 7×1019 atoms/cm3 or more and 2.5×1020 atoms/cm3 or less.

Abstract: An optical member having a porous layer having both low scattering and film strength is provided. The optical member is an optical member, having a porous layer in which a plurality of silicon oxide particles are bound with an inorganic binder on a base material, and the porous layer contains a fluorine-containing organic acid having 5 or more and 11 or less fluorine atoms in one molecule.

Abstract: An optical member includes a substrate and an antireflection film on the substrate. The antireflection film includes a porous layer at the surface thereof. The porous layer contains silicon oxide particles and a binder. The porous layer is provided with a fluororesin on at least part of the surface of the porous layer. The contact angle of n-hexadecane on the surface of the antireflection film is in the range of 50° to 80°.

Abstract: Provided is a transparent member having formed thereon a film having high reliability, the film being capable of suppressing an increase in its haze and maintaining its hydrophilicity for a long time period even when exposed to an outdoor environment. The transparent member is a transparent member including a resin base material and a porous layer arranged thereon, wherein the porous layer has a network structure in which silica particles are joined to each other with a binder, wherein the resin base material has a mixed layer that the network structure has entered, wherein the mixed layer has a thickness of 20 nm or more and 160 nm or less, and wherein a thickness variation in a range having a length of 1 ?m of a section of the mixed layer in its thickness direction along the surface of the resin base material is 15% or less.

Abstract: A precursor sol of aluminum oxide contains a polycondensate formed by the hydrolysis of an aluminum alkoxide or an aluminum salt, a solvent, and an organic aluminum compound having a specific structure. An optical member is produced by a process including a step of immersing an aluminum oxide film in a hot water with a temperature of 60° C. to 100° C. to form a textured structure made of aluminum oxide crystals, the aluminum oxide film being formed by feeding the precursor sol of aluminum oxide onto a base. A method for producing an optical member includes a step of immersing an aluminum oxide film in a hot water with a temperature of 60° C. to 100° C. to form a textured structure made of aluminum oxide crystals, the aluminum oxide film being formed by feeding the precursor sol of aluminum oxide onto a base.

Abstract: Provided are a member that reduces a change in refractive index at high humidity (60% RH or more and less than 90% RH) and a method of manufacturing the member. The member comprises a base material and a porous layer formed on at least any one of surfaces of the base material, wherein the porous layer has dN2 of 5 nm or more and 20 nm or less and dH2O of 25 nm or more and 75 nm or less, and has a contact angle with respect to water of less than 60°, in which dN2 is defined as a diameter of a pore at a time when a differential pore volume becomes maximum in the differential pore distribution in nitrogen adsorption and dH2O is defined as a diameter of a pore at a time when a differential pore volume becomes maximum in the differential pore distribution in water vapor adsorption.

Abstract: An optical member including a base material and an antireflection film on the base material, wherein the antireflection film has a porous layer as the surface, the porous layer contains silicon oxide particles and a binder, the porous layer has a refractive index of 1.19 or more and 1.30 or less, and the surfaces of the silicon oxide particles and the binder have alkylsilyl groups.

Abstract: An optical member includes a laminated body configured to reduce light reflection disposed on a substrate, wherein a surface of the laminated body is a porous layer or a layer having a textured structure, and at least one layer of the laminated body is a polymer layer containing a linear polymer and a branched polymer. A method for manufacturing the optical member is also provided. The branched polymer content is 10% by weight or more and 90% by weight or less of the total weight of the linear polymer and the branched polymer. The layer having a textured structure contains crystals mainly composed of aluminum oxide.

Abstract: The optical member according to the present invention includes a film containing a plurality of chain particles and having a refractive index of 1.21 or more and 1.27 or less at a wavelength of 550 nm on a substrate. The film includes an alcohol having an ether bond or an ester bond and having a branched structure having 4 to 7 carbon atoms in a range of 1.0 mg/cm3 or more and 2.8 mg/cm3 or less.

Abstract: Provided are a transparent member having excellent transparency and maintaining anti-fogging properties for a long period of time and a method for producing a transparent member. A transparent member includes a substrate and a stacked body having an organic layer and an inorganic porous layer stacked on the substrate in the mentioned order such that the both layers are in contact with each other, in which the organic layer includes an organic molecular chain network including an organic polymer chain and an organic crosslinking chain having 3 or more to 30 or less carbon atoms, and an acidic group aggregate, and in which the inorganic porous layer has hydrophilicity and includes silicon oxide.

Abstract: The present invention relates to an optical element including a base material, a light-shielding film, and a cured film in which an alkyd resin and a melamine resin having two or more iminomethylol groups in a molecule are condensed or in which an alkyd resin and a benzoguanamine resin having two or more iminomethylol groups in a molecule are condensed. The light-shielding film is disposed in at least a part of the periphery of the base material. The cured film is disposed on the surface of the light-shielding film.

Abstract: A method for manufacturing an optical member includes a step of applying a dispersion liquid containing particles and a dispersion medium on a substrate, a step of applying a solution containing a component to form a binder after the step of applying the dispersion liquid, and causing the solution to permeate a portion between the particles contained in the dispersion liquid applied in advance to form a single layer in which the portion between the particles is filled with the binder, and a step of drying the layer to prepare an antireflection film. The solution contains a silane-alkoxy condensate having an average particle diameter of 8 nm or more and 60 nm or less, and the solution contains a solvent having solubility of water of 10% by weight or less in an amount of 70% by mass or more.

Abstract: An optical element having a substrate and a light-shielding film on part of an outer portion of the substrate further contains a coating on the light-shielding film, the coating containing a cured mixture of a melamine or benzoguanamine resin, and a phenolic resin, in proportions by mass of 1:5 to 7:5.

Abstract: An optical element having a substrate and a light-shielding film on part of an outer portion of the substrate further contains a coating on the light-shielding film, the coating containing a cured mixture of a melamine or benzoguanamine resin, and a phenolic resin, in proportions by mass of 1:5 to 7:5.