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Related Experiment Video

Updated: Mar 26, 2026

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Precision enhancement method for multiplexing image detector-based sun sensor with varying and coded apertures.

Geng Wang, Fei Xing, Minsong Wei

    Applied Optics
    |February 3, 2016
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel sun sensor mask with varying aperture sizes to improve sun spot centroid extraction precision. The new design enhances accuracy and stability across the entire field of view, especially at large incident angles.

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    Area of Science:

    • Optics and Photonics
    • Aerospace Engineering
    • Sensor Technology

    Background:

    • Multiplexing image detector-based sun sensors offer high accuracy and wide fields of view (FOV).
    • Optical interference effects and aperture size significantly impact sun spot centroid extraction precision.
    • Incident sun angles affect diffraction patterns, reducing sensor accuracy.

    Purpose of the Study:

    • To propose a novel mask design with varying aperture sizes for improved sun sensor performance.
    • To enhance the extraction precision and stability of sun spot centroids under varying incident angles.
    • To address the limitations of fixed aperture patterns in sun sensor technology.

    Main Methods:

    • Utilized the Huygens-Fresnel diffraction integral formula for theoretical analysis.
    • Performed numerical simulations of aperture patterns at different incident sun angles.
    • Developed and tested a novel mask with varying aperture sizes encoded with distance information for sub-FOV distinction.

    Main Results:

    • The varying aperture pattern design demonstrated superior extraction precision compared to uniform aperture designs.
    • The improved design showed enhanced stability across the entire FOV, particularly at larger incident angles.
    • Sun sensor precision improved from 4.52" (1σ) to 1.32" (1σ) at a 50° incident sun angle.

    Conclusions:

    • A novel mask with varying aperture sizes significantly improves sun sensor accuracy and stability.
    • The proposed design effectively mitigates optical interference effects at various incident sun angles.
    • This advancement offers a more reliable and precise sun sensing capability for aerospace applications.