A method for real-time detection of common phase error of synthetic aperture telescope

By using multi-wavelength lasers to detect the phase error of the synthetic aperture telescope in real time, the imaging problem caused by the sub-mirror assembly and adjustment error was solved, achieving efficient phase error correction and improved imaging resolution.

CN120846650BActive Publication Date: 2026-06-12INST OF OPTICS & ELECTRONICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF OPTICS & ELECTRONICS CHINESE ACAD OF SCI
Filing Date
2025-09-23
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing technologies make it difficult to develop large-aperture telescopes. In synthetic aperture telescope systems, the assembly and adjustment errors of sub-mirrors lead to co-phase errors, which affect imaging resolution. Furthermore, existing methods cannot achieve real-time co-phase error detection.

Method used

A multi-wavelength laser is used as the detection light source. The optical path is changed by the same amount in the main optical path. The point spread function is collected in real time by multiple cameras. The phase information is calculated by inverse Fourier transform. The phase error is corrected by combining the multi-wavelength information.

Benefits of technology

It enables real-time, large-range co-phase error detection of synthetic aperture telescope systems, overcomes the 2π ambiguity limitation, and improves imaging resolution.

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Abstract

The application discloses a kind of for synthetic aperture telescope co-phase error real-time detection method, belong to optical imaging telescope field.The method utilizes multi-wavelength laser as detection light source, after collimating by beam expander, into synthetic aperture telescope system, then the light beam of a certain sub-mirror is phase modulated.Main light beam is again wavelength spectrometer, and the point spread function under different wavelengths is collected by multiple cameras in parallel.Based on the simultaneous measurement of multiple wavelengths, the modulation difference generated by phase modulator for different wavelengths is comprehensively considered, the wavefront phase information of each sub-mirror under different wavelengths is solved and the modulation error is eliminated, and finally the actual co-phase error between each sub-mirror of synthetic aperture telescope is obtained.The application can realize the same optical path modulation in main light path for different wavelengths, and acquire multi-wavelength data in parallel, which ensures real-time and realizes larger detection range.
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