Generic misalignment aberration patterns and the subspace of benign misalignment

Paul L. Schechter; Rebecca Sobel Levinson

doi:10.1117/12.925075

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27 September 2012 Generic misalignment aberration patterns and the subspace of benign misalignment

Paul L. Schechter, Rebecca Sobel Levinson

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Proceedings Volume 8444, Ground-based and Airborne Telescopes IV; 844455 (2012) https://doi.org/10.1117/12.925075
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

Q1: Why deploy N wavefront sensors on a three mirror anastigmat (TMA) and not N + 1? Q2: Why measure M Zernike coefficients and not M + 1? Q3: Why control L rigid body degrees of freedom (total) on the secondary and tertiary and not L + 1? The usual answer: “We did a lot of ray tracing and N, M, and L seemed OK.” We show how straightforward results from aberration theory may be used to address these questions. We consider, in particular, the case of a three mirror anastigmat.

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Paul L. Schechter and Rebecca Sobel Levinson "Generic misalignment aberration patterns and the subspace of benign misalignment", Proc. SPIE 8444, Ground-based and Airborne Telescopes IV, 844455 (27 September 2012); https://doi.org/10.1117/12.925075

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