New method for estimating wavefront from curvature signal by curve fitting

Details New method for estimating wavefront from curvature signal by curve fitting New method for estimating wavefront from curvature signal by curve fitting

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995opten..34.1232h&link_type=abstract

Optical Engineering 34(04), 1232-1237, Brian J. Thompson; Ed.

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Scientific paper

We present a new method to estimate the wavefront with the curvature- sensing technique proposed by F. Roddier. Instead of solving a Poisson equation for the curvature signal, we estimate the wavefront by direct least-squares curve fitting of the curvature signal with derivatives of Zernike polynomials. It is computationally simpler and faster. From computer simulations, it is shown that the curve-fitting method gives quite accurate wavefront estimation. It is especially useful when only a fixed number of aberration modes are of interest, as in the optical- axis adjustment of a telescope.

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