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Proceedings Paper

Testing of telescope optics: a new approach
Author(s): Claude A. Roddier; Francois J. Roddier; Alan N. Stockton; Andrew J. Pickles; Nicolas A. Roddier
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Paper Abstract

Results recently obtained for the use of the curvature-sensing method as a substitute for slope sensing in optical wavefront reconstruction, using long-exposure CCD images of the beam cross-section on either side of the telescope focal plane. A program based on the solution to the Poisson equation is then applied in order to reconstruct the wavefront. Relative to the existing Hartmann sensing methods, curvature-sensing yields sensitivity comparable to that of the Shack-Hartmann test. Additional optics and reference plane-based calibration are obviated. Tests of the new method on an 88-inch Ritchey-Chretien telescope have yielded a map of residual wavefront errors as a solution of the Poisson equation.

Paper Details

Date Published: 1 July 1990
PDF: 11 pages
Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); doi: 10.1117/12.19190
Show Author Affiliations
Claude A. Roddier, Univ. of Hawaii/Manoa (United States)
Francois J. Roddier, Univ. of Hawaii/Manoa (United States)
Alan N. Stockton, Univ. of Hawaii/Manoa (United States)
Andrew J. Pickles, Univ. of Hawaii/Manoa (United States)
Nicolas A. Roddier, Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 1236:
Advanced Technology Optical Telescopes IV
Lawrence D. Barr, Editor(s)

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