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Proceedings Paper

Solar adaptive optics with the DKIST: status report
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Paper Abstract

The DKIST wavefront correction system will be an integral part of the telescope, providing active alignment control, wavefront correction, and jitter compensation to all DKIST instruments. The wavefront correction system will operate in four observing modes, diffraction-limited, seeing-limited on-disk, seeing-limited coronal, and limb occulting with image stabilization. Wavefront correction for DKIST includes two major components: active optics to correct low-order wavefront and alignment errors, and adaptive optics to correct wavefront errors and high-frequency jitter caused by atmospheric turbulence. The adaptive optics system is built around a fast tip-tilt mirror and a 1600 actuator deformable mirror, both of which are controlled by an FPGA-based real-time system running at 2 kHz. It is designed to achieve on-axis Strehl of 0.3 at 500 nm in median seeing (r0 = 7 cm) and Strehl of 0.6 at 630 nm in excellent seeing (r0 = 20 cm). We present the current status of the DKIST high-order adaptive optics, focusing on system design, hardware procurements, and error budget management.

Paper Details

Date Published: 7 August 2014
PDF: 10 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91481S (7 August 2014); doi: 10.1117/12.2056990
Show Author Affiliations
Luke C. Johnson, National Solar Observatory (United States)
Keith Cummings, National Solar Observatory (United States)
Mark Drobilek, National Solar Observatory (United States)
Scott Gregory, National Solar Observatory (United States)
Steve Hegwer, National Solar Observatory (United States)
Erik Johansson, National Solar Observatory (United States)
Jose Marino, National Solar Observatory (United States)
Kit Richards, National Solar Observatory (United States)
Thomas Rimmele, National Solar Observatory (United States)
Predrag Sekulic, National Solar Observatory (United States)
Friedrich Wöger, National Solar Observatory (United States)


Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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