A precision manufacturing method of an ultra-wide-angle special aspherical surface lens

By employing milling, grinding, and polishing processes, combined with high-force grinding and polishing molds and lens bonding molds, and utilizing glass auxiliary blocks for concentric positioning, the processing challenges of ultra-wide-angle irregular aspherical lenses have been solved, achieving high-precision lens manufacturing.

CN115647992BActive Publication Date: 2026-03-27TIANJIN JINHANG INST OF TECH PHYSICS
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Patent Information

Application Number
CN202211333521.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-10-28
Publication Date
2026-03-27
Estimated Expiration
2042-10-28

AI Technical Summary

Technical Problem

Existing technologies make it difficult to manufacture ultra-wide-angle irregular aspherical lenses, especially concave spherical lenses with convex surfaces that are high-order aspherical and concave surfaces that are approximately hemispherical. This results in extremely difficult processing and makes it impossible to meet the precision requirements of system imaging and structural installation.

Method used

By employing steps such as milling, grinding, and polishing, combined with high-force grinding and polishing molds and lens bonding molds, and using glass auxiliary blocks for concentric positioning, the eccentricity difference and surface accuracy are controlled, gradually forming irregular angles to ensure processing accuracy.

Benefits of technology

It has achieved precision manufacturing of ultra-wide-angle irregular aspherical lenses, solved the problems of eccentricity and surface accuracy during processing, and ensured the high-order aspherical surface shaping of the lens and the precise processing of irregular asymmetric lenses.

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Abstract

The application provides a precision manufacturing method of an ultra-wide-angle special-shaped aspheric lens. The ultra-wide-angle special-shaped aspheric lens is a lens with a convex surface of high-order aspheric surface, a concave spherical surface close to a half sphere, and an asymmetric shape angle and linear size. The method comprises the following steps: adjusting a milling and grinding machine tool shaft to process a lens blank, and coarsely grinding and forming the concave spherical surface; using a high force point grinding and polishing mold and lens sticking mold to precisely grind and polish the concave spherical surface; centering the aspheric surface on an edge grinding joint; sticking the concave spherical surface platform on the aspheric surface mold, and milling, polishing and correcting the aspheric surface; sticking the aspheric surface on a concave glass auxiliary block, and milling the edge of the concave spherical surface platform to form a special-shaped angle; adjusting the angle of the concave spherical surface platform, and repeating the milling process to form several special-shaped angles; and cleaning and detecting. The precision manufacturing method of the ultra-wide-angle special-shaped aspheric lens has the advantages of realizing the precision manufacturing of a complex special-shaped asymmetric lens.
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