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Ray tracing method for removing sidelobe laser interference in AOTF-based hyperspectral imaging.

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    Sidelobe artifacts in acousto-optic tunable filter (AOTF) hyperspectral imaging degrade data quality. This study proposes a novel method to effectively remove laser-induced sidelobes, enhancing imaging accuracy.

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    Area of Science:

    • Optics and Photonics
    • Image Processing
    • Spectroscopy

    Background:

    • Sidelobe phenomenon in acousto-optic tunable filter (AOTF)-based hyperspectral imaging arises from phase mismatching.
    • This phenomenon degrades hyperspectral imaging data quality, particularly in high brightness monochromatic and panchromatic target imaging scenarios.
    • Laser interference is a significant contributor to sidelobes in AOTF imaging.

    Purpose of the Study:

    • To investigate the acousto-optic interaction and phase matching conditions causing sidelobes in AOTF imaging.
    • To develop and validate a method for removing laser-induced sidelobes in AOTF-based hyperspectral imaging.

    Main Methods:

    • Analysis of acousto-optic interaction using phase matching conditions.
    • Development of a multi-step method for laser sidelobe removal: laser point extraction, reverse imaging, ray tracing, forward imaging, and laser elimination.
    • Experimental validation of the proposed sidelobe removal technique.

    Main Results:

    • The proposed method effectively identifies and removes laser-induced sidelobes from AOTF hyperspectral images.
    • Experimental results confirm the significant improvement in hyperspectral imaging data quality after sidelobe elimination.
    • The technique addresses a key limitation in AOTF-based hyperspectral imaging systems.

    Conclusions:

    • The developed method provides a robust solution for mitigating sidelobe artifacts in AOTF hyperspectral imaging.
    • Accurate hyperspectral data acquisition is crucial for various scientific and industrial applications.
    • This research contributes to enhancing the reliability and precision of AOTF imaging technology.