Testing of telescope optics: a new approach

Claude A. Roddier; Francois J. Roddier; Alan N. Stockton; Andrew J. Pickles; Nicolas A. Roddier

doi:10.1117/12.19190

1 July 1990 Testing of telescope optics: a new approach

Claude A. Roddier, Francois J. Roddier, Alan N. Stockton, Andrew J. Pickles, Nicolas A. Roddier

Proceedings Volume 1236, Advanced Technology Optical Telescopes IV; (1990) https://doi.org/10.1117/12.19190
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

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.

Citation Download Citation

Claude A. Roddier, Francois J. Roddier, Alan N. Stockton, Andrew J. Pickles, and Nicolas A. Roddier "Testing of telescope optics: a new approach", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19190

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