Title

Differential Shack-Hartmann curvature sensor: local principal curvature measurements

Authors

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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