Provided is a method for manufacturing an infrared-transmissive lens having an excellent surface quality. A method for manufacturing an infrared-transmissive lens includes firing a preform of a chalcogenide glass in an inert gas atmosphere to obtain a fired body and then subjecting the fired body to hot press molding.

A method is provided for producing a patterned glass wafer for packaging electronic devices in a wafer assembly. The method includes placing a glass sheet between two mold halves and heating until the glass sheet softens, while the mold halves are pressed against one another so that the glass sheet is reshaped and forms a patterned glass wafer. The first mold half has an array of projections and the second mold half has an array of recesses. The mold halves are arranged and shaped so that the recesses and projections oppose each other. The projections introduce cavities into the glass sheet during the reshaping and with the glass flowing into the recesses of the second mold half during the reshaping. The recesses are deep enough for the glass to at least partially not come in contact therewith and to form a convexly shaped glass surface in each recess.

A wide area forming device according to an embodiment of the present disclosure includes a mold unit in which an object to be formed is received, and a main chamber having an upper block press the mold unit to form the object to be formed, and a lower block supporting the mold unit.

Provided is an optical glass containing glass-forming cations, the optical glass satisfying, expressed in cation percent, 10 cat %B.sup.3+50 cat %, 15 cat %La.sup.3+35 cat %, 20 cat %Nb.sup.5+50 cat %, and 15 cat %Ti.sup.4+25 cat %.

A glass product forming mold includes a first mold and a second mold opposite to the first mold, a flat glass is formed into a three-dimensional glass structure after the first mold and the second mold are molded together. The first mold includes a first molding surface, a bottom surface, a side surface connecting the first molding surface and the bottom surface, and a first inclined surface; the second mold includes a second molding surface; and the first inclined surface extends to connect to the side surface from an edge of the first molding surface along a direction away from the first molding surface and the second mold. A thermal expansion coefficient of the first mold is smaller than that of the flat glass. Before complete cooling, the three-dimensional glass structure has been separated from the first molding surface, avoiding the deformation and rupture of the three-dimensional glass structure.

A mold includes a lower mold core and an upper mold core. The lower mold core has a first outside surface and a first molding surface including a first molding portion and a first supporting portion surrounding the molding portion. The upper mold core has a second molding surface opposite to the first molding surface and encloses a molding cavity with the first molding surface. The lower mold core includes a first gas inlet on the first outside surface, a first gas outlet on the first supporting portion, and a first gas channel in the lower mold core, the first gas channel connecting the first gas inlet and the first gas outlet. Gas flow out from the first gas outlet to separate the glass product from the lower mold core before the glass product is completely cooled down, which can avoid many adverse effects during the glass product process.

A glass product forming mold includes a mold body and a plurality of ejector mechanisms disposed on the mold body at intervals. The mold body is defined a plurality of gaps surrounding separately the mold body, and each gap receives one ejector mechanism. The mold body includes a forming surface for forming a glass product, the ejector mechanism includes a first wedge configured to lift the glass product and a second wedge configured to drive the first wedge to move vertically with respect to the forming surface, and the first wedge is flush with the forming surface. After the formation of the glass product, the ejector mechanisms lift the glass product so that the glass product does not contact with the mold body, avoiding the deformation and crack of the glass product, ensuring the quality of the glass product, accelerating the cooling of the glass product.

A glass product forming mold includes a mold body and a plurality of sliding blocks slidably mounted on the mold body and facing the glass product; each of the plurality of sliding blocks includes a first inclined surface; the plurality of sliding blocks are configured to be inserted between the glass product and the mold body through the plurality of the first inclined surfaces to separate the glass product from the mold body. The sliding blocks are driven to separate the glass product from the mold body, avoiding the deformation of raw glass products resulting from the uneven heat distribution, uneven shrinkage or excessive adhesion, and the glass products will not be interfered by the mold body during the process of cooling shrinkage, which reduces the risk of cracking of the glass product.

A mold includes a mold component, a plurality of ejector pins and a stop block. The mold component has a molding surface for forming a glass product and a bottom surface disposed opposite to the molding surface. The mold component defines a plurality of passing through holes through the molding surface and the bottom surface. Each ejector pin passes movably through one corresponding through hole and is configured to separate the glass product from the mold component. The stop block for forming a stop on the ejector pins disposed on one side of the bottom surface. Separates the glass product from the mold component before the glass product is completely cooled down by using the combination of the ejector pins together with the stop block, which can make the cooling of the glass product more uniform.

A method of molding an optical element includes: preparing a molding material; preparing an upper mold having an upper surface molding surface, a lower mold having a lower surface molding surface, and a side mold having a side surface molding surface; inserting a neck portion of the upper mold and a neck portion of the lower mold into a hole portion of the side mold; positioning a distal end of the neck portion of the lower mold below an opening rim of the hole portion, and electing oxygen that is in the molds through a gap formed between the opening rim of the hole portion and the molding material that has been placed on the lower surface molding surface; heating up the molding material; and press molding the molding material by bringing the upper mold and side mold, and the lower mold, closer to each other.