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    Ghost imaging resolution is limited by speckle size. Using a vortex beam can enhance ghost imaging resolution, with improvements quantified by topological charge.

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    Area of Science:

    • Optics and Imaging Science
    • Quantum Imaging Techniques

    Background:

    • Ghost imaging (GI) is a novel technique for image formation.
    • Imaging quality in GI systems is critically dependent on speckle size, influencing both resolution and signal-to-noise ratio (SNR).

    Purpose of the Study:

    • To analyze the relationship between speckle size and imaging resolution in ghost imaging.
    • To investigate the impact of speckle size on the signal-to-noise ratio (SNR) in ghost imaging.
    • To propose and evaluate a method for enhancing the critical resolution of ghost imaging systems.

    Main Methods:

    • Detailed analysis of the relationship between speckle size and resolution in ghost imaging.
    • Investigation into the correlation between speckle size and SNR.
    • Proposal of a ghost imaging enhancement scheme utilizing vortex beams.

    Main Results:

    • Critical resolution in ghost imaging is found to be approximately equal to the speckle size (diameter).
    • Optimal SNR is achieved when speckle size exceeds object size.
    • Vortex beams demonstrate potential for enhancing critical resolution in GI systems.

    Conclusions:

    • Speckle size is a fundamental parameter determining resolution in ghost imaging.
    • Vortex beams offer a quantifiable method to improve ghost imaging resolution, dependent on topological charge.