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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Multifilter phase imaging with partially coherent light.

Micah H Jenkins, Joshua M Long, Thomas K Gaylord

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    Summary
    This summary is machine-generated.

    A new quantitative phase imaging technique accurately measures phase shifts using Köhler illumination. This method extends prior work to partially coherent imaging, showing robust performance in simulations and experiments.

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    Area of Science:

    • Optical imaging
    • Phase contrast microscopy
    • Quantitative phase imaging

    Background:

    • Accurate phase estimation is crucial for various microscopy applications.
    • Existing methods often struggle with partially coherent light sources.
    • Quantitative phase imaging (QPI) provides label-free contrast.

    Purpose of the Study:

    • To develop and validate a novel quantitative phase imaging method.
    • To enable accurate phase estimation under Köhler illumination with extended sources.
    • To generalize QPI techniques for partially coherent imaging scenarios.

    Main Methods:

    • Utilized Köhler illumination from an extended incoherent source.
    • Estimated the longitudinal intensity derivative in the transport-of-intensity equation.
    • Employed multiple Savitzky-Golay filters for robust derivative estimation.

    Main Results:

    • The method accurately estimates phase over a wide range of length scales.
    • Performance was evaluated via numerical simulations.
    • Experimental validation was performed using a blazed transmission grating and a single-mode fiber.

    Conclusions:

    • The developed QPI method effectively handles partially coherent illumination.
    • It offers accurate phase estimation suitable for practical imaging conditions.
    • The technique demonstrates reliable noise and resolution performance.