Stellar images taken by the Hubble Space Telescope at various focus positions have been analyzed to estimate wave-front distortion. Rather than using a single algorithm, we found that better results were obtained by combining the advantages of various algorithms. For the planetary camera, the most accurate algorithms consistently gave a spherical aberration of −0.290-μm rms with a maximum deviation of 0.005 μm. Evidence was found that the spherical aberration is essentially produced by the primary mirror. The illumination in the telescope pupil plane was reconstructed and evidence was found for a slight camera misalignment.
© 1993 Optical Society of America
Original Manuscript: June 24, 1992
Published: June 1, 1993
Claude Roddier and François Roddier, "Combined approach to the Hubble Space Telescope wave-front distortion analysis," Appl. Opt. 32, 2992-3008 (1993)