Differential Shack-Hartmann curvature sensor: local principal curvature measurements

    Authors

    W. Zou; K. P. Thompson;J. P. Rolland

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    J. Opt. Soc. Am. A-Opt. Image Sci. Vis.

    Keywords

    ADAPTIVE OPTICS; IMAGE MOTION; TOPOGRAPHY; Optics

    Abstract

    The concept of a differential Shack-Hartmann (DSH) curvature sensor was recently proposed, which yields wavefront curvatures by measuring wavefront slope differentials. As an important feature of the DSH curvature sensor, the wavefront twist curvature terms can be efficiently obtained from slope differential measurements, thus providing a means to measure the Monge-equivalent patch. Specifically, the principal curvatures and principal directions, four key parameters in differential geometry, can be computed from the wavefront Laplacian and twist curvature terms. The principal curvatures and directions provide a "complete" definition of wavefront local shape. Given adequate sampling, these measurements can be useful in quantifying the midspatial-frequency wavefront errors, yielding a complete characterization of the surface being measured. (C) 2008 Optical Society of America.

    Journal Title

    Journal of the Optical Society of America a-Optics Image Science and Vision

    Volume

    25

    Issue/Number

    9

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    2331

    Last Page

    2337

    WOS Identifier

    WOS:000259659100024

    ISSN

    1084-7529

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