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Proceedings Paper

Optical design of a high-order adaptive optics for the NSO Dunn Solar Telescope and the Big Bear Solar Observatory
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Paper Abstract

The National Solar Observatory (NSO) and the New Jersey Institute of Technology are jointly developing high order solar Adaptive Optics (AO) to be deployed at both the Dunn Solar Telescope (DST) and the Big Bear Solar Telescope (BBST). These AO systems are expected to deliver first light at the end of 2003. We discuss the AO optical designs for both the DST and the BBST. The requirements for the optical design of the AO system are as follows: the optics must deliver diffraction-limited imaging at visible and near infrared over a 190"×190" field of view. The focal plane image must be flat over the entire field of view to accommodate a long slit and fast spectrograph. The wave-front sensor must be able to lock on solar structure such as granulation. Finally, the cost for the optical system must fit the limited budget. Additional design considerations are the desired high bandwidth for tip/tilt correction, which leads to a small, fast and off-the-shelf tilt-tip mirror system and high throughput, i.e., a minimal number of optical surfaces. In order to eliminate pupil image wander on the wave-front sensor, both the deformable mirror and tip-tilt mirror are located on the conjugation images of the telescope pupil. We discuss the details of the optical design for the high order AO system, which will deliver high resolution image at the 0.39 - 1.6 μm wavelength range.

Paper Details

Date Published: 11 February 2003
PDF: 7 pages
Proc. SPIE 4853, Innovative Telescopes and Instrumentation for Solar Astrophysics, (11 February 2003); doi: 10.1117/12.460270
Show Author Affiliations
Deqing Ren, National Solar Observatory (United States)
Steven L. Hegwer, National Solar Observatory (United States)
Thomas Rimmele, National Solar Observatory (United States)
Leonid V. Didkovsky, Big Bear Solar Observatory (United States)
Philip R. Goode, Big Bear Solar Observatory (United States)

Published in SPIE Proceedings Vol. 4853:
Innovative Telescopes and Instrumentation for Solar Astrophysics
Stephen L. Keil; Sergey V. Avakyan, Editor(s)

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