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Proceedings Paper

Lateral shearing interferometry: evaluation and control of the optical performance of astronomical telescopes
Author(s): Eli Ettedgui-Atad; John W. Harris; Colin M. Humphries; Victoria C. Salter
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Paper Abstract

A system aimed at real-time wavefront analysis at the focus of an astronomical telescope has been developed. The method uses Zernike polynomial descriptions of the fringes from a lateral shearing interferometer and the resulting Zernike coefficients for the sheared state are matrix transformed to those of the real wavefront. Tests to confirm that the method operates correctly are described and preliminary results are given with the interferometer at the focus of a Ritchey-Chretien telescope. Applications include quantitative evaluation and correction of telescope mirror misalignments, active optics, and the determination of dome and atmospheric seeing parameters.

Paper Details

Date Published: 1 July 1990
PDF: 10 pages
Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); doi: 10.1117/12.19276
Show Author Affiliations
Eli Ettedgui-Atad, Royal Observatory Edinburgh (United Kingdom)
John W. Harris, Royal Observatory Edinburgh (United Kingdom)
Colin M. Humphries, Royal Observatory Edinburgh (United Kingdom)
Victoria C. Salter, Royal Observatory Edinburgh (United Kingdom)

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

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