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Aberration-correction results from a segmented microelectromechanical deformable mirror and a refractive lenslet

M K Lee, W D Cowan, B M Welsh

    Optics Letters
    |December 18, 2007
    PubMed
    Summary

    Quadratic aberration was corrected using a microelectromechanical deformable mirror and lenslet array. This method improved the fill factor and achieved diffraction-limited correction for spherical aberration.

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    Area of Science:

    • Optics and optical devices
    • Microelectromechanical systems (MEMS)

    Background:

    • Aberrations in optical systems, such as spherical aberration, limit imaging performance.
    • Deformable mirrors are used to correct optical aberrations.
    • Microelectromechanical systems (MEMS) offer miniaturized and precise control for optical elements.

    Purpose of the Study:

    • To demonstrate the correction of quadratic aberration using a segmented microelectromechanical deformable mirror combined with a refractive lenslet array.
    • To evaluate the effectiveness of the lenslet array in improving the fill factor of the correcting element.
    • To assess the performance of the system in correcting extreme spherical aberration.

    Main Methods:

    • Utilized a segmented microelectromechanical deformable mirror for aberration correction.
    • Incorporated a refractive lenslet array to enhance the fill factor of the deformable mirror.
    • Conducted experimental tests to measure the correction of spherical aberration.

    Main Results:

    • Successfully corrected quadratic aberration.
    • The lenslet array significantly improved the effective fill factor of the deformable mirror.
    • Experimental results demonstrated aberration correction approaching the diffraction limit for extreme spherical aberration.

    Conclusions:

    • The combination of a segmented MEMS deformable mirror and a lenslet array is an effective method for correcting quadratic and spherical aberrations.
    • This approach enhances optical system performance by improving the fill factor and achieving near-diffraction-limited results.