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Related Experiment Video

Updated: Jun 13, 2026

Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging
10:01

Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging

Published on: September 8, 2017

Graded-index sphere lens with hemispherical rod cladding.

K Kikuchi, T Morikawa, J Shimada

    Applied Optics
    |April 17, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Spherical aberration in millimeter-scale lenses is minimized to the diffraction limit. This is achieved by cladding a parabolic refractive-index sphere with a hemispherical rod for improved optical performance.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Spherical aberration limits optical system performance.
    • Designing lenses with minimized aberrations is crucial for high-resolution imaging.

    Purpose of the Study:

    • To minimize spherical aberration in a millimeter-scale lens.
    • To achieve diffraction-limited performance for a numerical aperture (N.A.) of 0.45.

    Main Methods:

    • Utilizing a radially inhomogeneous sphere with a nearly parabolic refractive-index profile.
    • Cladding the sphere with a hemispherical rod.

    Main Results:

    • Achieved minimization of spherical aberration to the diffraction limit.
    • Demonstrated effectiveness for a numerical aperture (N.A.) of 0.45.
    • The lens has a diameter of several millimeters.

    Conclusions:

    • The proposed lens design effectively corrects spherical aberration.
    • This approach enables high-performance optical components at the millimeter scale.