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Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects
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High-order ghost imaging using non-Rayleigh speckle sources.

Kyrus Kuplicki, Kam Wai Clifford Chan

    Optics Express
    |November 19, 2016
    PubMed
    Summary

    Non-Rayleigh speckle fields enhance resolution in high-order thermal ghost imaging. Sub-Rayleigh speckle fields offer the best resolution, outperforming traditional Gaussian methods.

    Area of Science:

    • Optics
    • Quantum Imaging
    • Photon Statistics

    Background:

    • Non-Rayleigh speckle fields generated using spatial light modulators exhibit unique high-order correlations.
    • Traditional Gaussian moment theorem is insufficient for analyzing these advanced speckle fields.
    • Correlation-based optical imaging, like thermal ghost imaging, can benefit from non-conventional speckle properties.

    Purpose of the Study:

    • To investigate the impact of non-Rayleigh and Rayleigh speckle fields on resolution and visibility in high-order thermal ghost imaging.
    • To compare the performance of different speckle field types in advanced imaging scenarios.
    • To determine the optimal speckle field characteristics for improved ghost imaging resolution.

    Main Methods:

    • Numerical simulations were employed to model and analyze thermal ghost imaging.

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  • Both non-Rayleigh and Rayleigh speckle fields were simulated and compared.
  • Resolution and visibility metrics were evaluated across various ghost orders and speckle types.

    • Main Results:

    • Higher-order speckle fields consistently improve resolution in thermal ghost imaging, irrespective of speckle type.
    • Sub-Rayleigh speckle fields demonstrate superior resolution compared to Rayleigh speckle fields.
    • The choice of speckle field significantly influences the achievable resolution in high-order ghost imaging.

    Conclusions:

    • Non-Rayleigh speckle fields, particularly sub-Rayleigh types, offer a significant advantage for enhancing resolution in high-order thermal ghost imaging.
    • These findings suggest a departure from traditional Gaussian assumptions for optimal performance in advanced optical imaging.
    • The study provides valuable insights for designing future correlation-based imaging systems utilizing tailored speckle fields.