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Experimental study on high-precision phase diversity wavefront sensing using a distorted grating.

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    Summary
    This summary is machine-generated.

    Phase diversity wavefront sensing using a distorted grating offers efficient, vibration-resistant imaging. Experimental validation confirms high-precision wavefront sensing with this technique.

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    Area of Science:

    • Optical Engineering
    • Wavefront Sensing and Metrology

    Background:

    • Phase diversity is an effective wavefront sensing technique.
    • Distorted gratings enable efficient, vibration-resistant acquisition of multiple phase-diverse images.
    • Previous applications were limited by a lack of experimental validation for high-precision sensing.

    Purpose of the Study:

    • To experimentally validate the effectiveness of distorted grating phase diversity for high-precision wavefront sensing.
    • To design and fabricate a distorted grating for generating multiple defocused images.
    • To improve the phase diversity algorithm for processing large-scale data.

    Main Methods:

    • Designed and fabricated a distorted grating to produce three defocused images.
    • Employed an improved Broyden-Fletcher-Goldfarb-Shanno (BFGS) algorithm for enhanced phase diversity computation.
    • Conducted experimental verification using an off-axis two-mirror optical system.

    Main Results:

    • Demonstrated high-precision wavefront sensing capabilities.
    • The improved BFGS algorithm enhanced stability and efficiency with large datasets.
    • Successful experimental validation of the distorted grating phase diversity technique.

    Conclusions:

    • The distorted grating phase diversity technique is experimentally validated for high-precision wavefront sensing.
    • The improved BFGS algorithm enhances the practical application of this method.
    • This study promotes the broader application of distorted grating phase diversity in optical metrology.