HST phase retrieval: a parameter estimation

Details HST phase retrieval: a parameter estimation HST phase retrieval: a parameter estimation

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991spie.1567..317l&link_type=abstract

Proc. SPIE Vol. 1567, p. 317-326, Applications of Digital Image Processing XIV, Andrew G. Tescher; Ed.

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It was found, on orbit, that the Hubble Space Telescope had a conic constant error in the primary mirror. The result of the error is a substantial amount of spherical aberration in the image, significantly reducing image resolution and encircled energy. Parametric phase retrieval was the method used to determine the source of error and to find the magnitude from on-board camera images. The parameters which are estimated are a set of annular Zernike polynomials which are analogous to the classical aberrations. This was one of the first practical uses of phase retrieval for on-orbit measurement. This paper contains an overview of the algorithms, how they were used and the major results.

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