771results about "Glass press-moulding apparatus" patented technology

(1) Alignment mark transfer portion(s) is/are formed on the transfer molding surface of a mold that is used for press-molding a optical element fixing member and having alignment marks; (2) alignment mark(s) is/are formed on the mold material by dry-etching, and the mold material is worked using the alignment mark(s) as a reference to form the transfer molding surface constituted by a plurality of transfer patterns, in order to obtain a mold for press-molding; and (3) the transfer patterns are formed by dry-etching, or a transfer molding bare surface for transfer patterns is formed by dry-etching and a mold release film is formed thereon to reflect the shape of the transfer molding base surface, in order to obtain a mold for press-molding.

The invention relates to a manufacturing method of a die for molding an optical element. The manufacturing method comprising: forming the first film layer of an amorphous allow having a super-cooling liquid phase onto a master transfer surface of a master die for molding a molding transfer surface of the die; heating the first film layer more than a glass transition point of the amorphous alloy having the super-cooling liquid phase while a surface of the first film layer and a transferred surface of a base material of the die being faced and pressed; and peeling the first film layer from the master die and transferring the first film layer onto the base material of the die to form the molding transfer surface of the die.

Vacuum-insulated glass (VIG) windows (10) that employ glass-bump spacers (50) and two or more glass panes (20) are disclosed. The glass-bump spacers are formed in the surface (24) of one of the glass panes (20) and consist of the glass material from the body portion (23) of the glass pane. Thus, the glass-bump spacers are integrally formed in the glass pane, as opposed to being discrete spacer elements that need to be added and fixed to the glass pane. Methods of forming VIG windows are also disclosed. The methods include forming the glass-bump spacers by irradiating a glass pane with a focused beam (112F) from a laser (110). Heating effects in the glass cause the glass to locally expand, thereby forming a glass-bump spacer. The process is repeated at different locations in the glass pane to form an array of glass-bump spacers. A second glass pane is brought into contact with the glass-bump spacers, and the edges (28F, 28B) sealed. The resulting sealed interior region (40) is then evacuated to a vacuum pressure of less than one atmosphere.

The optical fiber fixing member made of glass, especially optical fiber guide block, is conventionally produced by a mechanical processing. However, the mechanical processing has problems that a production cost becomes high and mass-production is difficult. The problems above can be solved by the present invention providing a method for producing an optical fiber fixing member comprising: disposing a glass shaping preform whose plane view resembles to the plane view of the molded article and whose faces to be positioned in the pressurizing direction during press-molding assumes planes or outwardly convex curved surfaces, in a mold having a cavity of a given shape; and heating the glass shaping preform up to a temperature at which the glass shaping preform can be mold-shaping and thereby press-molding it into a molded article having at least one edge formed of a free surface.

A molded glass article manufacturing device, having a means of forcefully separating a molded glass article attached to the forming surface of an upper mold or a lower mold, and readily and reliably aligning the axes of the upper mold and lower mold, a molded glass article manufacturing method, and a method of assembling a molded glass article manufacturing device are provided. A molded glass article manufacturing device comprising a drum capable of regulating an upper mold and a lower mold having opposing forming surfaces so that the displacement axes thereof align; a forced mold separating means separating a molded glass article adhered to a forming surface from the mold by contact with at least the rim portion of the molded glass object; and a displacement means for displacing said forced mold separating means relative to said upper mold or said lower mold so that, in the course of separation of said upper mold and said lower mold, said forced mold separating means contacts at least the rim portion of said molded glass article and separates said molded glass article from the forming surface. Further, a manufacturing method for molded glass articles employing this device and a method of assembling molded glass article manufacturing devices are disclosed.

Molten glass is press-molded by a metallic die in which a cylindrical body is provided in a vertically standing manner at a central part of a bottom surface of a bottomed hole and a molding surface corresponding to a chamfering shape of an outer peripheral edge surface of a glass substrate is consecutively formed in an inner peripheral wall, and a glass substrate precursor provided with the chamfering shape axially consecutive on an outer peripheral surface thereof and a through hole formed at a central part thereof is thereby formed. The glass substrate precursor is cut perpendicular to an axial direction to be separated into respective glass substrates. Next, the respective glass substrates are subjected to a lapping process and a polishing process, if necessary, to produce a glass substrate as a final product. According to the manufacturing method, a glass substrate for information recording medium whose inner and outer peripheral edge surfaces are chamfered can be manufactured with an improved efficiency. Further, a glass substrate having a small diameter can be manufactured with a high efficiency.

A cylinder-shaped Cr mask having a diameter of 0.15 μm is formed at a pitch of 0.15 μm 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 μm and a height of 0.15 μm is formed on the surface of the quartz glass substrate. An Ir—Rh alloy film having a thickness of 0.05 μm 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. An optical material 11 (crown based borosilicate glass) to which a releasing agent containing carbon (C) particulates for mold release is applied is press-molded with the mold having an antireflection structure, and the press-molded optical material is released from the mold having an antireflection structure without cooling. After the press-molded optical material is cooled, the releasing agent is removed.

Provided is an optical glass that has high-refractivity and high-dispersion properties and can give preforms for press-molding, which are excellent in shapability at high temperatures and suitable for precision press-molding.

The optical contains, as essential components, 25 to 45 mol % of B₂O₃, 2 to 20 mol % of SiO₂, 5 to 22 mol % of La₂O₃, 2 to 20 mol % of Gd₂O₃, 15 to 29 mol % of ZnO, 1 to 10 mol % of Li₂O and 0.5 to 8 mol % of ZrO₂, the optical glass having a B₂O₃/SiO₂ molar ratio of from 2 to 5.5 and having an La₂O₃ and Gd₂O₃ total content of 12 to 24 mol % and a ZnO and Li₂O total content of 25 to 30 mol %, the optical glass having a refractive index (nd) of 1.75 to 1.85 and an Abbe's number (νd) of 40 to 55, or the optical glass contains, as essential components, B₂O₃, SiO₂, La₂O₃, Gd₂O₃, ZnO, Li₂O and ZrO₂ and has a viscosity of at least 6 dPa·s at a liquidus temperature thereof, a glass transition temperature (Tg) of 600° C. or lower, a refractive index (nd) of 1.75 to 1.85 and Abbe's number (νd) of 40 to 55.

A rectangular stacked lens module and a manufacturing method thereof are disclosed. The rectangular stacked lens module is produced by cutting straight lines through a stacked lens module array. Firstly, it produces at least two lens arrays. Each lens array includes a plurality of optical lenses by multi-cavity glass molding and at least one alignment member disposed on the non-optical area of the lens array. Then at least the two lens arrays are assembled by the alignment members and are stacked with other optical elements so as to form a stacked lens module array. The optical axis of each optical lens is aligned easily with each other so as to meet requirements for optical precision. Moreover, the manufacturing processes are simplified and the purposes of mass-production and low cost are achieved.

A microstructure is formed in a viscous glass or plastic substrate by pressing a structured surface of a forming tool corresponding to a negative of the microstructure to be produced in the viscous glass or plastic substrate. After the microstructure has been formed, the forming tool is removed from the surface. In order to help form the microstructure and remove the forming tool from the substrate the forming tool has an at least partially porous base body (1) and an operative layer (2) structured with a negative structure consisting of grooves (11) extending to the porous base body (1). The forming of the microstructure in the substrate is assisted by applying suction to the porous base body (1) so that the grooves (11) fill more easily and completely with melted glass or plastic material. The removal of the forming tool after forming the microstructure is assisted by applying an overpressure to the porous body to help release the solidified glass or plastic material from the forming tool.

It is found that alloys including amorphous phase comprising at least a first element selected from the group consisting of Pt and Ru, at least a second element selected from the group consisting of Zr, Hf, Si, Ir, Ru, Pd and Ni, and at least a third element selected from the group consisting of Si, Cu, Cr, Fe, Mo, Co, Al, Zr, Hf, Ni and Ru have excellent machining characteristics, heat-resistant characteristics, corrosion resistance and adhesion resistance. Using the alloys as the molding surface of a die, a heat resistant molding die for forming glass optical device having fine structure for performing high definite functions became possible to manufacture with excellent machining characteristics.

An optical glass having a remarkably high refractive index and excellent stability can be give without being based on PbO, and the optical glass contains, as essential components, at least one oxide selected from La₂O₃, Gd₂O₃, Y₂O₃, Yb₂O₃, TiO₂, Nb₂O₅ or WO₃, at least one oxide selected from MgO, CaO, SrO or BaO and B₂O₃ and optionally containing SiO₂, wherein on the basis of mass, the total content of B₂O₃ and SiO₂ is from 1 to 25%, the ratio of (B₂O₃+SiO₂)/(La₂O₃+Gd₂O₃+Y₂O₃+Yb₂O₃+TiO₂+Nb₂O₅+WO₃) is from 0.05 to 0.3 and the ratio of (MgO+CaO+SrO+BaO)/(La₂O₃+Gd₂O₃+Y₂O₃+Yb₂O₃+TiO₂+Nb₂O₅+WO₃) is from 0.1 to 0.4, the optical glass having a refractive index (nd) of 2.000 or more and an Abbe's number (vd) of 27 or less.

In order to solve problems involved in micromolding of a glass, according to the present invention, there can be provided a technology for enabling molding of a glass without applying a large load.

A molding apparatus of a glass material according to the present invention is characterized by containing means for holding a glass material and a molding die in contact with each other, means for heating the glass material and the molding die, and means for applying a voltage across the glass material and the molding die, in which press-molding is performed by electrostatic attraction acting between a surface of the glass material and a surface of the molding die. Further, a molded product of a glass material according to the present invention is characterized by including an alkali metal as a component, in which a concentration of the alkali metal is lowered in vicinity of a surface to be molded as compared with that of a glass base material.

An electronic device cover glass blank (G) to be used as a substrate of an electronic device cover glass includes a pair of main surfaces (1A, 1B), and end surfaces that adjoin the pair of main surfaces (1A, 1B). The main surfaces are shaped so as to be asymmetric to each other in the thickness direction. The main surfaces (1A, 1B) are press-molded surfaces formed by direct pressing. A method for manufacturing the cover glass blank includes a molding step in which a pair of dies is used for press molding a mass of molten glass supplied from a molten glass supplying unit. The pressing surface of at least one of the pair of dies has a shape for forming the main surfaces and an interposed surface.

An optical element being high in productivity and capable of ensuring a large bonding area, and a production method of the optical element. At mold opening when a top part (120) provided with a round portion (121) moves upward, a preform is placed in an inner space the interior of which is formed by a rectangular sleeve (110) and the round portion (131) of a bottom part (130). At mold clamping when the top part (120) moves downward, the preform is pressurized. That is, a convex lens portion is transferred by the concave curved surface (122) and the edge surface (123) of the round portion (121) and the concave curved surface (132) and the edge surface (133) of the round portion (131). The four side surfaces of an optical element (1) are transferred by the inner wall surface (110a) of the sleeve (110). Further, part of the preform jumps out into the gap portion (140) between the outer peripheral surfaces (121a, 131a) of the round portions (121, 131) and the inner wall surface (110a) of the sleeve (110) to thereby form a protrusion portion of the optical element (1). The optical element (1) has a marker (2) formed on the top surface (11a) of its body, and the marker (2) may be formed to extend linearly along the optical axis of lens portions (12, 16). The marker (2) is formed to protrude from the top surface (11a). The side surface (11b) and the side surface (11c) of the body may be formed such that the separating distance between the side surface (11b) and the side surface (11c) gradually increases toward a bottom surface (11d).

In a method of manufacturing a glass optical element by press-forming a glass material in a chamber by using a forming mold comprising upper and lower dies at least one of which is movable, where a surrounded space is formed between the glass material and at least one of the upper and the lower dies when the upper and the lower dies come into contact with the glass material, a pressure within the chamber is reduced before the glass material placed in the forming mold is heated to a press-forming temperature. After sealing the space as formed when the glass material is in contact with at least one of forming surfaces of the upper and the lower dies, a gas is introduced into the chamber. The glass material is heated in the gas and then press-formed under a pressing load.

In a composite molded lens, a press-formed lens body is integral with an injection-molded lens frame. The lens body has a lens portion and a flange portion surrounding the lens portion. Eight projections are radially formed on a top surface of the flange portion. The height of the projection increases toward an outer peripheral edge side of the flange portion. A recess is formed on an outer peripheral edge face of the flange portion and located at a position on a line extending from the projection. The recess increases torsional resilience of a joint surface between the lens body and the lens frame and strengthens bonding force there between.

The present invention relates to a manufacturing method for an optical glass element, in which molten glass 9 is pressed between a lower mold 1 and an upper mold 8, and the pressing process is carried out while maintaining a space 10 between a border area (5, 6) of a molding face 2 belonging to the lower mold 1 and a circumferential face 3 located on the periphery thereof and glass 9, and an optical glass element manufactured by such a method.

An exemplary molding apparatus (100) includes a first mold core (110), a second mold core (120), a lens holder (130), an elastic member (140) and a mold frame (150). The first mold core is substantially cylindrical and has a first molding surface for press molding a top surface of a lens. The second mold core is substantially cylindrical and has a second molding surface for press molding a bottom surface of the lens. The lens holder has a cavity for fitting the lens. The elastic member is a spring. The elastic member is placed between the lens holder and the second mold core. The first mold core, the second mold core, the lens holder and the elastic member are disposed in the mold frame.