Measurement of wavefront aberration of human eye using talbot image of two-dimensional grating

Ryotaro Sekine, Takashi Shibuya, Kazuhiko Ukai, Shinichi Komatsu, Masayuki Hattori, Toshifumi Mihashi, Naoki Nakazawa, Yoko Hirohara

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    The measurement of human ocular aberration is now frequently performed because of the increase in refractive surgery on the human cornea. The Hartmann-Shack (H-S) wavefront sensor is considered to be the most useful wavefront sensor, and a calculation method for wavefront aberration has been established. New methods of measuring wavefront aberrations of human eyes, using the Talbot image of a two-dimensional grating as a wavefront sensor and local shift of the Talbot image to calculate tilt of the wavefront are shown. The shift of the Talbot image was determined by comparing the phases of fundamental spatial frequency between the grating and the local patch of the Talbot image by Fourier transformation. The actual experiment was performed using a modified commercially available wavefront analyzer. Using these methods, Talbot images were obtained from model eyes and a human eye, and wavefront shapes were successfully reconstructed. Wavefront aberrations can be measured even when the obtained image is degraded by defocusing or scattering.

    Original languageEnglish
    Pages (from-to)207-211
    Number of pages5
    JournalOptical Review
    Volume13
    Issue number4
    DOIs
    Publication statusPublished - 2006 Jul

    Keywords

    • Fourier analysis
    • Human eye
    • Talbot image
    • Two-dimensional grating
    • Wavefront aberration
    • Wavefront sensor

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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  • Cite this

    Sekine, R., Shibuya, T., Ukai, K., Komatsu, S., Hattori, M., Mihashi, T., Nakazawa, N., & Hirohara, Y. (2006). Measurement of wavefront aberration of human eye using talbot image of two-dimensional grating. Optical Review, 13(4), 207-211. https://doi.org/10.1007/s10043-006-0207-2