Hot press molding technique for special optical glass element

Abstract

The invention relates to a hot-press forming technique for special optical glass elements, which is carried out by three steps and comprises heating process, forming process and slow cooling process; the hot-press forming technique is characterized in that:1) the heating process: heating high precision optical elements and an optical glass precision high temperature softening furnace to the high temperature of 1200 DEG C and heating the special optical elements and optical glass raw materials to above the softening temperature Tg to reach forming requirements; 2) the forming process: putting the softened high precision optical elements and the optical glass raw materials in a heat insulation metal module and taking a single piece by hands to put the single piece in the environment within the temperature range of 300 to 650 DEG C for the press forming; 3) the slow cooling process: using a tunnel-typed annealing furnace for lowering temperature and annealing at the temperature of 700 to 400 DEG C for about 4 hours. The novel technique adopted by the invention accelerates the production speed, greatly improve the working efficiency of a forming machine, meanwhile improves working efficiency per unit hour, thus leading components to reach comparatively high size precision, surface shape precision and surface roughness and opening the era of non ball surfaced optical glass components being widely used as photoelectric instruments.

Description

Technical field: [0001] The invention relates to a high-precision hot-pressed optical glass element forming process, in particular to a hot-pressed glass forming process composed of a plurality of special optical element optical glass precision high-temperature softening furnaces for heating and softening optical glass rods and tunnel annealing furnaces at a certain time interval Equipment and high-precision precision molds are used to complete the hot-pressed optical glass molding of special optical elements, without grinding, polishing blank processing, centering, edging, and gluing processing methods. Background technique: [0002] In recent years, many new special optical components have been researched and developed, which have been widely used in the optoelectronic industry, such as various high-order aspheric optical lenses, various irregular optical prisms, high-order aspheric optical lenses and optical prisms. Composite parts, the above-mentioned various optical ele...

AI Technical Summary

Problems solved by technology

[0005] In order to increase the production speed and reduce the cost; solve the problem of shortening the heating and heating time; in order to solve the problem of glass sticking to the die surface of the mold, in order to obtain high-precision special optical element optical glass thermocompression molding parts, complete various high-order aspheric surfaces The composite optical element composed of optical lens and optical prism is processed and formed at one time. The purpose of the present invention is to adopt the new equipment for precise thermocompression molding of special optical element optical glass developed by ourselves, and provide a thermocompression molding process for special optical glass element.

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