Wide-angle lens with free-form curved surface

By iteratively adjusting the sag, curvature, or slope of freeform surfaces, and combining this with other optical surface optimizations, the design challenge of asymmetrical 2D object-image mapping functions in wide-angle lenses was solved, achieving efficient optical system optimization and image quality improvement.

CN116057443BActive Publication Date: 2026-02-06YIMEI LANDSCAPE CO
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Patent Information

Application Number
CN202180057400.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-06-26
Filing Date
2021-06-26
Publication Date
2026-02-06
Estimated Expiration
2041-06-26

AI Technical Summary

Technical Problem

Existing technologies make it difficult to design wide-angle lenses with asymmetrically distributed 2D object-image mapping functions, and existing optical design optimization software cannot effectively optimize freeform surfaces to achieve the desired mapping function.

Method used

Through iterative steps, starting from the initial optical design, the sag, curvature, or slope of freeform surfaces is calculated, and freeform surfaces and other optical surfaces in the optical system are adjusted by interpolation or fitting to meet the desired 2D object-image mapping function, optimizing other specifications of the optical system.

Benefits of technology

It enables precise adjustment of the 2D object-image mapping function in wide-angle lenses, meeting other optical requirements of the optical system and improving image quality and field of view control.

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Abstract

A method of designing a wide-angle optical system having at least one free-form optical surface without rotational symmetry to create a custom 2D object-image mapping. The method is based on iteratively adjusting the shape of the at least one free-form optical 2D surface to have the desired precise 2D object-image mapping, and then adjusting the surface of the optical element to meet other desired optical specifications. The iterative method is applied until the desired 2D object-image mapping and other desired optical specifications are achieved.
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Citation Information

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