A Tilt-correction Adaptive Optical System for the Solar Telescope of Nanjing University

Details A Tilt-correction Adaptive Optical System for the Solar Telescope of Nanjing University A Tilt-correction Adaptive Optical System for the Solar Telescope of Nanjing University

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003chjaa...3..576r&link_type=abstract

Chinese Journal of Astronomy & Astrophysics, Vol. 3, No. 6, p. 576-586

Physics

Optics

1

Telescopes, Atmospheric Effects, Instrumentation, Adaptive Optics, Sun: Atmospheric Motions

Scientific paper

A tilt-correction adaptive optical system installed on the 430 mm Solar Telescope of Nanjing University has been put in operation. It consists of a tip-tilt mirror, a correlation tracker and an imaging CCD camera. An absolute difference algorithm is used for detecting image motion in the correlation tracker. The sampling frequency of the system is 419 Hz. We give a description of the system's configuration, an analysis of its performance and a report of our observational results. A residual jitter of 0.14 arcsec has been achieved. The error rejection bandwidth of the system can be adjusted in the range 5--28 Hz according to the beacon size and the strength of atmospheric turbulence.

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