An Initial Structural Design Method for a Stationary Zoom System Based on Analytical Region Definition

By establishing the basic structure of a stationary zoom system and introducing constraints such as the rear focusing group and deformable mirrors, combined with a global optimization algorithm, the problem of solving in high-dimensional parameter space was solved, realizing the design of an efficient stationary zoom system and improving zoom efficiency and image quality stability.

CN118962973BActive Publication Date: 2025-12-02RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN +1
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Patent Information

Application Number
CN202410984819.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-22
Publication Date
2025-12-02
Estimated Expiration
2044-07-22

AI Technical Summary

Technical Problem

Existing technologies struggle to find the global optimal solution for stationary zoom systems in high-dimensional parameter spaces, and unreasonable selection of parameter boundary conditions leads to difficulties in solving the problem, making it impossible to achieve high zoom efficiency and image plane stability.

Method used

By establishing the basic structure of a classic stationary zoom system, determining the mathematical range and boundary conditions of key parameters, introducing minimum braking constraints for the back focusing group and deformable mirror, and combining the Gaussian bracket method and nodal aberration theory, a nonlinear evaluation function is established and solved using a global optimization algorithm.

Benefits of technology

It achieves a highly efficient design of a stationary zoom system, improves zoom capability and image quality stability, and optimizes system performance, especially showing significant advantages in aberration correction and zoom efficiency.

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Abstract

A method for designing the initial structure of a stationary zoom system includes the following steps: S1, establishing the basic structure of a classic stationary zoom system, determining the mathematical range of key parameters of the intermediate zoom group, and realizing the partitioning of the solution region and parameter dimensionality reduction; S2, introducing a rear focusing group, and introducing minimum braking constraints for deformable mirrors and realizing continuous zoom and basic aberration constraints based on free space; S3, establishing a nonlinear evaluation function, and obtaining the globally optimal numerical solution within the boundary conditions of the set variables and the analytical region of the structure. This invention solves the problem of not being able to obtain a convergent solution when directly using optical design software for optimization design. By incorporating the telescope structure into the stationary zoom system to reduce the dimensionality of key parameters, the numerical solution of the initial structure is calculated. This process involves a series of equations and constraints describing the stationary zoom system, which can effectively correct aberrations, achieve high zoom efficiency, and maintain a stable image plane at the required magnification.
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