Development of multi time-step tomographic reconstruction with RAVEN

Yoshito Ono, Masayuki Akiyama, Shin Oya, Olivier Ladière

研究成果: Paper

抜粋

In this paper, we present a tomographic reconstruction method to reduce a tomographic error, multi time-step reconstruction, for a wide-field adaptive optics (WFAO). Based on the frozen flow assumption, we can compute the time evolution of measurements from wave-front sensors (WFS) at previous time-steps with using wind information. Our idea is to reduce the tomographic error by using the measurements at both the current and previous time-steps simultaneously. We also develop a method to estimate wind speed and direction at each altitude from temporal correlations of phase distortion pattern reconstructed by a classical tomography. We evaluate the performance of the method by a laboratory experiment with the RAVEN, a multi-object adaptive optics (MOAO) technical and science demonstrator. In the laboratory experiment, our wind estimation method can estimate wind speeds and directions of multiple layers. By the multi time-step reconstruction method, the ensquared energy in a 140 mas box increases about 3-5% compared with a classical tomographic reconstruction.

元の言語English
DOI
出版物ステータスPublished - 2015
イベント4th Adaptive Optics for Extremely Large Telescopes, AO4ELT 2015 - Lake Arrowhead, United States
継続期間: 2015 10 262015 10 30

Other

Other4th Adaptive Optics for Extremely Large Telescopes, AO4ELT 2015
United States
Lake Arrowhead
期間15/10/2615/10/30

ASJC Scopus subject areas

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

フィンガープリント Development of multi time-step tomographic reconstruction with RAVEN' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用

    Ono, Y., Akiyama, M., Oya, S., & Ladière, O. (2015). Development of multi time-step tomographic reconstruction with RAVEN. 論文発表場所 4th Adaptive Optics for Extremely Large Telescopes, AO4ELT 2015, Lake Arrowhead, United States. https://doi.org/10.20353/K3T4CP1131602