10 August 2010 Shape correction of thin mirrors in a recongurable modular space telescope
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Abstract
In order to facilitate the construction of future large space telescopes, the development of low cost, low mass mirrors is necessary. However, such mirrors suffer from a lack of structural stability, stiffness, and shape accuracy. Active materials and actuators can be used to alleviate this deficiency. For observations in the visible wavelengths, the mirror surface must be controlled to an accuracy on the order of tens of nanometers. This paper presents an exploration of several mirror design concepts and compares their effectiveness at providing accurate shape control. The comparison test is the adjustment of a generic mirror from its manufactured spherical shape to the shape required by various off-axis mirrors in a segmented primary mirror array. A study of thermal effects is also presented and, from these results, a recommended design is chosen.
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Keith Patterson, Sergio Pellegrino, James Breckinridge, "Shape correction of thin mirrors in a recongurable modular space telescope", Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 773121 (10 August 2010); doi: 10.1117/12.861442; https://doi.org/10.1117/12.861442
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