Manufacturing method of glass precision molded aspheric lens

Abstract

The invention discloses a manufacturing method for an aspheric lens through precise glass compression molding. The method comprises the following steps: a, providing lubricating oil, a glass material preform and a precise compression molding die, wherein the die comprises an upper cavity, a lower cavity, an inner barrel and an outer barrel; b, separating the outer barrel and allowing the upper cavity to rise so as to separate the upper cavity from the lower cavity; c, coating a layer of the lubricating oil on the cylindrical surfaces of the upper cavity and the lower cavity or on the inner wall of the inner barrel; d, putting the glass material preform in the lower cavity; e, allowing the upper cavity to descend until the upper cavity abuts against the glass material preform and assembling and closing the outer barrel; f, subjecting the glass material preform to high temperature treatment and softening; g, pressurizing the upper cavity to allow the upper cavity to descend so as to realize precise compression molding of the glass material preform, thereby forming a primary aspheric lens; f, cooling the primary aspheric lens; and i, separating the outer barrel, allowing the upper cavity to ascend and carrying out demoulding to obtain the final aspheric lens. The manufacturing method provided by the invention effectively overcomes the problem of poor sliding of the die, is simple to operate, has a substantial effect and guarantees stability and excellence of the produced aspheric lens.

Description

technical field [0001] The invention designs a method for manufacturing an optical element, and in particular relates to a method for manufacturing an aspheric lens. Background technique [0002] Traditional lenses are processed by grinding, and it is not easy to produce high-precision aspheric lenses. Therefore, glass molding is currently the most suitable technology for making aspheric optical lenses. Using glass molding methods, aspheric lenses can be mass-produced. In conventional glass In the precision molding process, in order to meet the requirements of the product, the mold design is very precise, and the gap between the mold core and the inner cylinder is also very strict. At high temperature, the unilateral gap is about 1 micron to 2 microns; Softening under the environment, so the working environment of the mold must be in a high temperature environment. In view of the above, the mold often fails to slide smoothly, resulting in product surface accuracy not up to s...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method of manufacturing aspherical lenses that effectively solves the problem of poor mold sliding, is easy to operate, has remarkable effects, and ensures product stability and excellent glass precision molding.

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