A micro- and nano-hot embossing method for an optical glass lens array, including: preparing a mold with a micro-hole array by micro EDM, where the micro-hole array matches an optical glass lens array and the mold is made of a hard metal material which is conductive and meets strength and temperature requirements; preparing a nano nitride-based graded composite coating on a surface of the mold by magnetron sputtering; and pre-fabricating a glass preform and then placing the glass preform on the surface of the mold; heating the glass preform and hot embossing by a glass molding machine in vacuum; cooling in nitrogen atmosphere; and demolding to produce the optical glass lens array. The micro- and nano-hot embossing method of the present invention improves the surface quality of the optical glass lens array and reduces the cost and difficulty for manufacturing.

Plurality of glass droplets are simultaneously dropped toward center of a regular polygon of each unit on a first transfer surface of a first forming die where a plurality of the units is regularly arranged along the same plane, taking, as one unit, three or more first optical transfer surfaces for forming a lens portion placed in such a manner as to overlap vertices of the regular polygon respectively. After the divided glass droplets flow on the first transfer surface, are connected to each other between adjacent units, and are formed into united glass, and before the united glass hardens completely, a second forming die including a plurality of second optical transfer surfaces corresponding respectively to the plurality of first optical transfer surfaces is pressed relatively against the united glass on the first forming die to form the united glass, and released from the dies.

Provided is a mold manufacturing method that is capable of manufacturing a mold of a complex shape particularly of an optical element with sufficient shape accuracy and within a relatively short time. This mold manufacturing method includes: a step for forming a base made of metal into a first shape through machining; a step for coating the base with a resin layer; a step for forming the resin layer into a second shape; and a step for forming the base into a third shape through dry-etching.

There are provided a lens forming mold, and a manufacturing method for a cylindrical lens, with which cylindrical lenses having good mass productivity can be manufactured. A lens forming mold for forming a molding on which a plurality of cylindrical surfaces are arranged in parallel includes: a first mold including a plurality of cylindrical surface forming portions that are arranged in parallel at equal intervals; and a first flat surface forming portion that is provided between adjacent cylindrical surface forming portions; and a second mold that sandwiches the glass material and faces the first mold when the molding is molded, in which the second mold includes a second flat surface forming portion that faces the plurality of cylindrical surface forming portions and the first flat surface forming portion.

A method of forming a glass-based article comprises depositing molten glass onto a first molding member and pressing the molten glass between the first and second molding members by moving the first molding member and the second molding member towards one another. The pressing of the molten glass comprises moving a portion of one of the first and second molding members relative to a remaining portion thereof to form a first reduced-area pressing zone and, after formation of the first reduced-area pressing zone, moving the portion relative to the remaining portion to form a second reduced-area pressing zone where the molten glass is compressed between the first and second molding members.

A convex fitting portion 30 is provided on a center side to protrude from a support portion 20, and thus, in an assembling process of joining the lens array 100 to another lens array and the like, the lens array 100 can be precisely positioned by being supported from behind. Furthermore, a fitting portion transfer surface 83c forming the convex fitting portion 30 forms a concave portion on the center side of a die at the time of molding of the lens array 100, and thus a volume of a glass droplet, that is, heat capacity is increased, which is advantageous from a viewpoint of making molding of the optical surfaces 11a and 12a stable and highly precise, and the problems such as breakage are less likely to occur.

The invention relates to a method of manufacturing an primary optical array for a vehicle headlight, wherein the primary optical array comprises a first primary optical element with a light entry face, at least one second primary optical element with a light entry face, and a basic part connecting the first primary optical element mechanically to the second primary optical element, wherein a first mold and a second mold are provided, wherein the first mold comprises at least one first web for molding a side face of the first primary optical element facing the second primary optical element, and for molding a side face of the second primary optical element facing the first primary optical element, wherein the at least one first web has a web edge the width of which amounts to no more than 0.25 mm, wherein a gob is placed between the first mold and the second mold, wherein the gob is press-molded or pressed into the primary optical array by the first mold and the second mold moving towards each other.

Systems and methods for texturing substrates (e.g., glass, metal, and the like) and the textured substrates produced using such systems and methods are disclosed. An exemplary textured substrate includes a surface having a portion with a root-mean-square roughness between 40 to 1000 microns and an autocorrelation function greater than 0.5 for distances less than 50 microns. An exemplary system for texturing a substrate includes a plunger with a textured surface, where a portion of the textured surface has a root-mean-square roughness between 40 to 1000 microns and an autocorrelation function greater than 0.5 for distances less than 50 microns. An exemplary method for texturing a substrate includes the steps of generating a pattern defining a texture, and 3-D printing the pattern on the substrate to form the texture.

The present disclosure relates to a glass tile and a method of making a glass tile using a glass pressing technique. The glass tile may include a tile body of substantially homogenous glass material, an annular rim extending in a marginal portion of the tile body, and a cavity provided in a central portion of the tile body such that the glass tile forms a multi-sided compartment. A predefined texture may be disposed on at least part of the glass tile to provide a desired visual effect and/or a desired optical effect. The glass tile may be incorporated into a decorative assembly or structure such as flooring, roofing, doors and windows, landscaping and facades, and lighting.

An array of glass members is arranged in a glass substrate includes a plurality of depressions formed in a first main surface of the glass substrate, and a plurality of openings formed in a second main surface of the glass substrate.