Adjustment method of full free-form surface multi-reflective off-axis optical system

By combining spatial coordinate measuring equipment and autocollimating theodolites, precise positioning and high-precision assembly of the fully freeform surface multi-reflection off-axis optical system were achieved, solving the complexity and monitoring problems in the assembly process and improving the imaging quality of the system.

CN116224615BActive Publication Date: 2026-06-16XIAN INST OF OPTICS & PRECISION MECHANICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIAN INST OF OPTICS & PRECISION MECHANICS CHINESE ACAD OF SCI
Filing Date
2023-02-21
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

During the assembly and adjustment of a fully freeform surface multi-reflection off-axis optical system, the optical axis relationships of each optical element are complex, making assembly and adjustment difficult and integrated monitoring challenging.

⚗Method used

An initial coordinate system is established using spatial coordinate measuring equipment. The mirror is precisely positioned using an autocollimating theodolite and a cube mirror. A microscope and a measuring target ball are used for reference transfer and spatial pose measurement. A laser interferometer is used for system testing and aberration analysis to achieve a high-precision assembly and adjustment process.

🎯Benefits of technology

This reduces the difficulty of assembly and integration, and achieves unified design, processing and assembly standards for the fully freeform surface multi-reflection off-axis optical system, avoiding mirror scratches and improving measurement accuracy and imaging quality.

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Abstract

The present application relates to the optical system method, specifically relates to a kind of full free surface multi-reflective off-axis optical system's method for adjusting, for solving the full free surface multi-reflective off-axis optical system's method for adjusting more freedom, the relationship between the optical axis of each optical element is complex, system integration difficulty increases, the process is not easy to monitor the deficiency of adjustment.The full free surface multi-reflective off-axis optical system's method for adjusting establishes space coordinate system by space coordinate measuring equipment, combines autocollimator theodolite, cubic mirror is positioned accurately to each mirror, and utilizes microscope and measuring target ball to carry out benchmark transmission and space pose measurement, reduces the difficulty of assembly integration;The present application has strong operability, realizes the design, processing and adjustment benchmark of full free surface multi-reflective off-axis optical system uniform.
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