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Updated: Dec 25, 2025

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High-precision laser spot center positioning method for weak light conditions.

Ruihong Gao, Heshan Liu, Ya Zhao

    Applied Optics
    |April 1, 2020
    PubMed
    Summary

    Accurately determining the center of weak laser spots is crucial for space missions. This study introduces a novel high-precision positioning method that overcomes limitations of traditional techniques, meeting stringent requirements for applications like the Taiji program.

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    Area of Science:

    • Optical metrology
    • Space instrumentation
    • Precision engineering

    Background:

    • Accurate laser spot center determination is vital for space applications, including the Taiji program.
    • Traditional positioning methods suffer reduced precision under weak light conditions.

    Purpose of the Study:

    • To present a high-precision laser spot center positioning method.
    • To address the challenges posed by weak light conditions in laser positioning.

    Main Methods:

    • Theoretical analysis of factors influencing positioning precision.
    • Development of a novel laser spot center positioning algorithm.
    • Experimental validation of the proposed method.

    Main Results:

    • The developed method achieves high precision in laser spot center positioning.
    • Experimental results demonstrate the method's effectiveness under weak light.
    • The achieved precision meets the requirements of the Taiji program.

    Conclusions:

    • The proposed method offers a robust solution for accurate laser spot center determination in space applications.
    • This technique enhances the reliability of weak laser light positioning.
    • The method is suitable for demanding applications like the Taiji program.