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Proceedings Paper

Using wavefront sensor information in image post-processing to improve the resolution of telescopes with small aberrations
Author(s): David J. Lee; Michael C. Roggemann; Byron M. Welsh
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Paper Abstract

Due to mechanical aspects of fabrication, launch, and operational environment, space telescope optics can suffer from unforseen aberrations, detracting from their intended diffraction-limited performance goals. Presented here are the results of a simulation study designed to explore how wavefront aberration information could be used in post- processing to improve the effective resolution of such telescopes. Knowledge of the telescope pupil aberration can be effectively used in a post-processing paradigm referred to as deconvolution from wavefront sensing (DWFS). Simulation results show that even when relatively noisy wavefront sensor information is used on images experiencing up to 10% of a wave root-mean-squared (RMS) of unspecified wavefront error, the signal-to-noise ratios (SNRs) of the optical transfer function (OTF) can be increased by a factor of 1.5, and RMS OTF phasor angle errors can be approximately cut in half, across a wide range of spatial frequencies. Post-processing consisted of correction of the Fourier phase of the image spectra using information from wavefront sensing, without the use of inverse filtering or adaptive optics compensation.

Paper Details

Date Published: 1 November 1996
PDF: 12 pages
Proc. SPIE 2863, Current Developments in Optical Design and Engineering VI, (1 November 1996); doi: 10.1117/12.256253
Show Author Affiliations
David J. Lee, Air Force Institute of Technology (United States)
Michael C. Roggemann, Air Force Institute of Technology (United States)
Byron M. Welsh, Air Force Institute of Technology (United States)

Published in SPIE Proceedings Vol. 2863:
Current Developments in Optical Design and Engineering VI
Robert E. Fischer; Warren J. Smith, Editor(s)

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