Abstract

A 37-element solar adaptive optics system, which consists of a fine tracking loop with a tip/tilt mirror and a correlation tracker, and a high-order correction loop with a 37-element deformable mirror, a correlating Shack–Hartmann wavefront sensor, and a real-time controller, was built and installed at the 26cm solar fine structure telescope of the Yunnan Astronomical Observatory in 2009. In this system, the absolute difference algorithm is used. A new architecture with field-programmable gate array (FPGA) and digital signal processor (DSP) for the real-time controller based on systolic array and pipeline was developed. The computational latencies of the fine tracking loop and high-order correction loop are about 35 and 100μs, respectively. The tracking residual root-mean-square error is less than 0.1     arcsec, and the wavefront residual root-mean-square error is about 0.05 wavelengths (λ=550nm) after correction. The observational results show that the contrast and resolution of the solar images are improved after the correction by this adaptive optics system.

© 2010 Optical Society of America

Full Article  |  PDF Article
Related Articles
Solar imaging with a segmented adaptive mirror

D. S. Acton and R. C. Smithson
Appl. Opt. 31(16) 3161-3169 (1992)

Optical transfer functions derived from solar adaptive optics system data

Friedrich Wöger
Appl. Opt. 49(10) 1818-1825 (2010)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription