Challenges and Approach for Making the Top End Optical Assembly for the 4-meter Advanced Technology Solar Telescope

Details Challenges and Approach for Making the Top End Optical Assembly for the 4-meter Advanced Technology Solar Telescope Challenges and Approach for Making the Top End Optical Assembly for the 4-meter Advanced Technology Solar Telescope

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21942222c&link_type=abstract

American Astronomical Society, AAS Meeting #219, #422.22

Computer Science

Performance

Scientific paper

L-3 Integrated Optical Systems (IOS) Division has been selected by the National Solar Observatory (NSO) to make the Top End Optical Assembly (TEOA) for the 4-meter Advanced Technology Solar Telescope (ATST) to operate at Haleakala, Maui. ATST will perform to a very high optical performance level in a difficult thermal environment. The TEOA, containing the 0.65-meter silicon carbide secondary mirror and support, mirror thermal management system, mirror positioning and fast tip-tilt system, field stop with thermally managed heat dump, thermally managed Lyot stop, safety interlock and control system, and support frame, operates in the "hot spot” at the prime focus of the ATST and so presents special challenges. In this paper, we will describe the L-3 IOS technical approach to meet these challenges, including subsystems for opto-mechanical positioning, rejected and stray light control, wavefront tip-tilt compensation, and thermal management.
Key words: ATST, TEOA, L-3 IOS, thermal management, silicon carbide (SiC) mirrors, hexapods, solar astronomy

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