Aspheric lens manufacturing method

Abstract

Provided is an aspheric lens manufacturing method by which an aspheric lens having a desired shape can be manufactured with high accuracy regardless of the shape of a glass compact without reducing productivity. The aspheric lens manufacturing method for forming the aspheric lens by pressing and machining a glass material, comprises a pressing step for pressing the glass material to thereby form the aspheric surface, the flat surface of the peripheral edge of the aspheric surface, and the side surface continuous to the flat surface at the same time and form the glass compact, a mounting step for mounting the glass compact in a work holder which holds and positions the glass compact by being in contact with the flat surface and the side surface of the glass compact formed in the pressing step, and a machining step for machining the other surface of the glass compact mounted in the work holder in the mounting step to thereby form the other surface into a predetermined surface shape.

Description

technical field [0001] The present invention relates to a method for manufacturing an aspheric lens, and more particularly to a method for manufacturing an aspheric lens using molding and machining. Background technique [0002] In recent years, aspherical lenses have been used in a wide range of applications, such as lenses for digital cameras, optical pickup lenses for DVDs, camera lenses for mobile phones, coupling lenses for optical communication, and various mirrors. As a method for producing such an aspheric lens, press processing, machining (a generic term for cutting, grinding, and grinding) and the like are known. [0003] Compression molding is a processing method in which a heated and softened glass material is molded with an upper mold and a lower mold. This compression molding method can mold one side of a lens in a short time, but the molding conditions are very strict, and it is not easy to mold both sides with high precision. [0004] On the other hand, mac...

AI Technical Summary

Problems solved by technology

This compression molding method can mold one side of the lens in a short time, but the molding conditions are very strict, and it is not easy to mold both sides with high precision.

[0004] Machining can be processed with high precision. However, since it is necessary to use expensive and high-precision special working machines, and it takes a long time to perform grinding, etc., the required working time is longer than that of molding processing, which has disadvantages.

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