Abstract: Provided is an optical member that has a catalyst layer formed on its optical functional surface and zinc oxide formed to have a minute uneven structure where bump structures, each of which is oriented in a C-axis and is of a bell shape or a pyramid shape, are disposed substantially periodically on a surface of the catalyst layer. Preferably, the catalyst layer contains a catalyst material mainly including at least one element selected from among palladium, platinum, gold, silver, ruthenium, and rhodium. Thus, the optical member having a minute uneven structure formed on its surface and a method for easily manufacturing such an optical member can be provided.

Abstract: A lens has an SWS on its surface. The SWS has base and a plurality of convex portions arranged on a surface of the base, and is made of a mixed material obtained by dispersing inorganic fine particles in an organic material. The average refractive index of the SWS varies from the refractive index of air to the refractive index of the base, from a tip of each of the convex portions to the base. The inorganic fine particles exist more in a surface portion of each of the convex portions than in an inner portion of the convex portion.

Abstract: An optical lens is composed of a nanocomposite material including a resin material and nano-fine particles dispersed in the resin material. The nano-fine particles include indium tin oxide, and Ag or Au. The optical lens has improved performance of compensating chromatic aberration, enables further downsizing of lens barrels, and realizes improved transparency and reduction in scattered light by the nano-fine particles.

Abstract: An optical lens is composed of a nanocomposite material that includes a resin material, and nano-fine particles dispersed in the resin material. The nano-fine particles are multiple kinds of nano-fine particles including nano-fine particles formed of at least one selected from SiC, ZnS and Si3N4, and nano-fine particles formed of at least one selected from Al2O3, ZrO2, C and AlN. The optical lens has a high refractive index and a high Abbe number, and is usable as a substitute lens for a lens composed of a La glass.

Abstract: The present invention relates to a structure comprising: a resin pattern (A)3 formed on a base material 1 and having structure units of a predetermined shape; and a resin pattern (B)5 formed on a surface of the resin pattern (A)3 and having microscopic structure units, of a predetermined shape, arranged at a period shorter than or equal to a wavelength range of a using light, and to a method for producing the structure, comprising the steps of: (i) forming a resin layer 2 on the base material 1 and subjecting the resin layer 2 to an exposure-development process so as to form the resin pattern (A)3; and (ii) subjecting a surface of the resin pattern (A)3 to an exposure-development process so as to form the resin pattern (B)5, wherein the steps (i) and (ii) are sequential.

Abstract: The present disclosure relates to an optical member in which an antireflection concave-convex structure for suppressing reflection of light is provided on its surface, and an optical system, an optical unit and an optical device each including the optical member. The present disclosure provides an optical member in which the generation of reflection light and diffraction light is sufficiently suppressed and which can be fabricated in a simple manner. A antireflection concave-convex structure (15) for suppressing reflection of light, formed of filiform convex portions (16) regularly arranged, is provided on an interior surface (1a) of a lens tube (1). The antireflection concave-convex structure (15) is configured so that an angle between a normal vector of an incident plane of the light whose reflection is to be suppressed and a vector connecting respective apexes of adjacent two of the structure units at the incident surface is 60 degrees or less.

Abstract: The present invention relates to a structure comprising: a resin pattern (A)3 formed on a base material 1 and having structure units of a predetermined shape; and a resin pattern (B)5 formed on a surface of the resin pattern (A)3 and having microscopic structure units, of a predetermined shape, arranged at a period shorter than or equal to a wavelength range of a using light, and to a method for producing the structure, comprising the steps of: (i) forming a resin layer 2 on the base material 1 and subjecting the resin layer 2 to an exposure-development process so as to form the resin pattern (A)3; and (ii) subjecting a surface of the resin pattern (A)3 to an exposure-development process so as to form the resin pattern (B)5, wherein the steps (i) and (ii) are sequential.

Abstract: A micro-shape transcription method has preparing a mold having a transcription face on which a concavo-convex pattern is formed, pressing the transcription face against a base material softened by heating, then forcibly separating the mold from the base material to transcribe a reverse pattern of the concavo-convex pattern to the surface of the base material, wherein when assuming a temperature for pressing the mold against the base material as T1 (° C.), a temperature for separating the mold from the base materials T2 (° C.), thermal expansion coefficients of the mold and the base material as ?a and ?b, and the maximum distance between the transcription center of the transcription face and the concavo-convex pattern as d (mm), the following relations (1) and (2): T1?T2 ??(1) |?a??b|·(T1?T2)·d?4×10?2 ??(2) are simultaneously satisfied.

Abstract: A micro-shape transcription method has preparing a mold having a transcription face on which a concavo-convex pattern is formed, pressing the transcription face against a base material softened by heating, then forcibly separating the mold from the base material to transcribe a reverse pattern of the concavo-convex pattern to the surface of the base material, wherein when assuming a temperature for pressing the mold against the base material as T1 (° C.), a temperature for separating the mold from the base material as T2 (° C.), thermal expansion coefficients of the mold and the base material as ?a and ?b, and the maximum distance between the transcription center of the transcription face and the concavo-convex pattern as d (mm), the following relations (1) and (2): T1?T2 ??(1) |?a??b|·(T1?T2)·d?4×10?2 ??(2) are simultaneously satisfied.

Abstract: A cylinder-shaped Cr mask having a diameter of 0.15 ?m is formed at a pitch of 0.15 ?m on a quartz glass substrate. The quartz glass substrate on which the cylinder-shaped Cr mask is formed is placed in a RF dry-etching apparatus and the surface of the quartz glass substrate is etched with CHF3+O2 gas. Thus, a cone-shaped antireflection structure with a pitch of 0.15 ?m and a height of 0.15 ?m is formed on the surface of the quartz glass substrate. An Ir—Rh alloy film having a thickness of 0.05 ?m for protecting the surface is formed on the surface (pressing surface) of the quartz glass substrate provided with the cone-shaped antireflection structure to form a mold having an antireflection structure.

Abstract: A press-molding die can manufacture magnetic disks suitable for the zone-texture technique in large quantities and at a low price by forming smooth surface areas and rough surface areas on the surface of the press-molding die. A manufacturing method for this press-molding die is provided. A magnetic-disk glass substrate that has improved CSS properties and allows a lower flying height is formed using this press-molding die. An intermediate layer is formed by sputtering on a die base material. A mask having an aperture is formed on the intermediate layer. The surface of the intermediate layer is roughened by etching in the aperture. A first protective layer is formed by sputtering in the etched portion. After the mask has been removed, a second protective layer is formed on the intermediate layer by sputtering. The surface roughness of the rough surface portion is reflected by the surface roughness of the first protective layer.

Abstract: A press-molding die comprises a base material, an intermediate layer formed on a surface of the base material and a protective layer formed on the intermediate layer. The base material comprises an inorganic oxide. The intermediate layer comprises a material that adheres to both the base material and the protective layer and is heat resistant at high temperatures wherein the die is used. The protective layer comprises at least one metal film selected from the group consisting of tungsten (W), platinum (Pt), palladium (Pd), rhodium (Rh), ruthenium (Ru), iridium (Ir), osmium (Os), rhenium (Re), tantalum (Ta) and alloys thereof.

Abstract: A die for press-molding glass optical elements comprising (a) a base material having heat resistance and sufficient strength to withstand press-molding of optical glass elements; (b) a film on said base material comprising an alloy film containing B and one metal selected from the group consisting of Ni, Co, and Fe, and one metal selected from the group consisting of Si, Ti, Cu, Zr, Nb, Mo, Ru, Rh, Pd, Hf, Ta, W, Re, Os, and Ir, to form a cutting layer; and (c) a surface protective layer on top of said cutting layer made of an alloy film comprising at least one metal selected from the group consisting of Pt, Pd, Ir, Rh, Os, Ru, Re, W, and Ta.

Abstract: A die for press-molding glass optical elements which can press-mold glass optical elements having high melting points and various shapes repeatedly, which includes a base material having high strength on which a cutting layer having heat resistance and free cutting machinability is formed. After cutting the cutting layer into the desired shape with high accuracy, the die is coated with a surface protective film.

Abstract: A method for press molding preforms to obtain optical articles in which each preform is prepared beforehand to have a diameter larger than that of an optically functional area of the optical article and edges of the preform to be press mold contact with molding surfaces of a pair of molds outside an area of each molding surface corresponding to the optically functional area of the optical article, thereby elongating the lifetime of molds.

Abstract: An aspherical lens, which is to be used as an objective lens for an optical pickup of an optical disc apparatus, has at least one optical functional surface of the lens formed to be rotationally asymmetric so as to generate astigmatism of axial wavefront aberration for cancelling off-axis astigmatism. The lens is manufactured by press molding an optical material such as glass or resin. At least one of the dies is formed by etching a rotationally symmetric surface of a base material, unevenly. Thereby, the etched surface becomes rotationally asymmetrically aspherical in shape.

Abstract: A method of press-molding glass optical elements by press-molding glass, having a high melting point, at a temperature of 650.degree. C. and higher using a die for press-molding glass optical elements which includes a base material having a heat resistance and sufficient strength to withstand press-molding of optical glass elements, a cutting layer on the base material, and a surface protective layer on the cutting layer. The cutting layer is formed of an alloy film containing P and one metal selected from the group Ni, Co, and Fe, and one metal from the group Si, Ti, Cu, Zr, Nb, Mo, Ru, Rh, Pd, Hf, Ta, W, Re, Os, and Ir, or an alloy film containing Cu and 20 to 80 atom % of one metal selected from the group Ni, Co, Fe, Si, Ti, Zr, Nb, Mo, Ru, Rh, Pd, Hf, Ta, W, Re, Os, and Ir, or an alloy film containing Si and 20 to 80 atom % of one metal selected from the group Ni, Co, Fe, Cu, Ti, Zr, Nb, Mo, Ru, Rh, Pd, Hf, Ta, W, Re, Os, and Ir.

Abstract: A die for press-molding glass optical elements which can press-mold glass optical elements having high melting points and various shapes repeatedly, which includes a base material having high strength on which a cutting layer having heat resistance and free cutting machinability is formed. After cutting the cutting layer into the desired shape with high accuracy, the die is coated with a surface protective film.

Abstract: A die for press-molding a glass optical element which includes a base material having a surface to press-mold glass and a tantalum(Ta)-containing alloy thin layer on the surface, the base material being heat-resistant and strong enough to withstand press-molding.

Abstract: A die which can press-mold an accurate glass microoptical element such as a grating repetitively can be manufactured easily by adhering a thin film, having an inverse shape of the master of a micro-optical element, on the top flat plane of a hard base body and by forming a protective layer thereon. The die having an inverse shape of the master can press-mold glass repetitively. By press-molding glass with the die, a large number of reliable glass micro-optical elements of the same shape as the master can be produced at a low cost.