Filtering the interaction matrix in an adaptive optics system

Xianyu Zhang, Nicolas Gorceix, Philip R. Goode

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

We present a method to reduce the noise in the interaction matrix by calibration of the adaptive optics system. The method utilizes a matching between the actuators on the deformable mirror and the sub-apertures on the wavefront sensor to define a filter matrix. Then, the filter matrix is applied to the sparse interaction matrix to remove the elements that should be zero. This method is useful for high-order systems and/or noise calibration issues. The latter case is illustrated in the problem of on-sky calibration of an adaptive secondary system on a telescope, with a natural guide star, in which the noise in the interaction matrix is increased by the effects of the turbulent atmosphere.

Original languageEnglish (US)
DOIs
StatePublished - 2015
Event4th Adaptive Optics for Extremely Large Telescopes, AO4ELT 2015 - Lake Arrowhead, United States
Duration: Oct 26 2015Oct 30 2015

Conference

Conference4th Adaptive Optics for Extremely Large Telescopes, AO4ELT 2015
CountryUnited States
CityLake Arrowhead
Period10/26/1510/30/15

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Instrumentation
  • Electronic, Optical and Magnetic Materials
  • Space and Planetary Science
  • Astronomy and Astrophysics
  • Mechanical Engineering

Keywords

  • Adaptive optics
  • Atmosphere
  • Filter
  • Interaction matrix
  • New solar telescope

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