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Sequential phase diversity for wavefront correction using a deformable mirror with modeling errors.

Norihide Miyamura, Makoto Hirose, Seichi Sato

    Applied Optics
    |December 1, 2023
    PubMed
    Summary
    This summary is machine-generated.

    Sequential phase diversity (PD) wavefront sensing and control (WFSC) compensates for static aberrations in Earth observation imagers. This method improves correction accuracy even with imperfect deformable mirror models.

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    Area of Science:

    • Optical engineering
    • Remote sensing technology
    • Wavefront sensing and control

    Background:

    • Phase diversity (PD) is crucial for wavefront sensing and control (WFSC) in spaceborne imagers.
    • Directly actuating corrective devices for PD WFSC can lead to modeling inaccuracies due to actuator properties.
    • Accurate modeling of diversity wavefronts is challenging with certain corrective devices.

    Purpose of the Study:

    • To propose a novel sequential phase diversity (SPD) method for WFSC.
    • To address the challenge of compensating for static aberrations with corrective devices that have modeling errors.
    • To enhance the performance of WFSC in high-resolution Earth observation imagers.

    Main Methods:

    • Developed the sequential phase diversity (SPD) WFSC method.
    • Repeated PD WFSC, using the estimated corrective wavefront as known diversity in subsequent steps.
    • Validated the method through numerical simulations and experimental demonstration with a face-sheet deformable mirror.

    Main Results:

    • Numerical simulations confirmed improved correction performance with linear modeling errors.
    • Experimental demonstration successfully removed aberrations using a deformable mirror with complex non-linear responses.
    • Simulations showed effective correction of discontinuous wavefront aberrations in multi-aperture systems.

    Conclusions:

    • The proposed SPD WFSC method effectively compensates for static aberrations despite modeling errors.
    • The technique is robust, demonstrated by successful experiments with non-ideal hardware.
    • SPD WFSC holds potential for advancing optical remote sensing systems towards unprecedented resolution.