26 August 2009 Large segmented UV-optical space telescope using a Hybrid Sensor Active Control (HSAC) architecture
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Future large UV-optical space telescopes offer new and exciting windows of scientific parameter space. These telescopes can be placed at L2 and borrow heavily from the James Webb Space Telescope (JWST) heritage. For example, they can have similar deployment schemes, hexagonal mirrors, and use Wavefront Sensing and Control (WFSC) technologies developed for JWST. However, a UV-optical telescope requires a 4x improvement in wavefront quality over JWST to be diffraction-limited at 500 nm. Achieving this tolerance would be difficult using a passive thermal architecture such as the one employed on JWST. To solve this problem, our team has developed a novel Hybrid Sensor Active Control (HSAC) architecture that provides a cost effective approach to building a segmented UV-optical space telescope. In this paper, we show the application of this architecture to the ST-2020 mission concept and summarize the technology development requirements.
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Lee D. Feinberg, Lee D. Feinberg, Bruce Dean, Bruce Dean, Tupper Hyde, Tupper Hyde, Bill Oegerle, Bill Oegerle, Matthew R. Bolcar, Matthew R. Bolcar, J. Scott Smith, J. Scott Smith, } "Large segmented UV-optical space telescope using a Hybrid Sensor Active Control (HSAC) architecture", Proc. SPIE 7436, UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts IV, 743608 (26 August 2009); doi: 10.1117/12.824198; https://doi.org/10.1117/12.824198


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