MODELING AND COMPARISON OF CLOSED-LOOP AND OPENLOOP ADAPTIVE OPTICS SYSTEMS

Authors

  • Mahmood K. Mirdan Department of Astronomy and Space, College of science, University of Baghdad.
  • Raaid N. Hassan Department of Astronomy and Space, College of science, University of Baghdad.
  • Bushra Q. Al-Aboodi Department of Astronomy and Space, College of science, University of Baghdad.

Keywords:

Adaptive Optics, Closed-Loop, Open-Loop, OOMAO

Abstract

Astronomers have known since the invention of the telescope that atmospheric turbulence affects celestial images. So, in order to compensate for the atmospheric aberrations of the observed wavefront, an Adaptive Optics (AO) system has been introduced. The AO can be arranged into two systems: closedloop and open-loop systems. The aim of this paper is to model and compare the performance of both AO loop systems by using one of the most recent Adaptive Optics simulation tools, the Objected-Oriented Matlab Adaptive Optics (OOMAO). Then assess the performance of closed and open loop systems by their capabilities to compensate for wavefront aberrations and improve image quality, also their effect by the observed optical bands (near-infrared band and visible band), the shape of the telescope aperture (circular and hexagonal) and the atmospheric seeing conditions. The results showed that open-loop systems perform better than closed-loop systems at good seeing and vice versa. Also showed that closed-loop provides stability in the correction process over time, while the open-loop is a faster phase compensator

References

R. Tyson, Principles of Adaptive Optics, 3rd ed., CRC Press, Florida, 2010.

S. Maji, H. Yahia, T. Fusco, A Multifractal-based wavefront phase estimation technique for ground-based astronomical observations. IEEE Trans. Geosci. Remote Sens., vol. 54, no. 3, pp. 1705-1715, 2016. https://doi.org/10.1109/TGRS.2015.2487546.

S. Niu, J. Shen, C. Liang, Y. Zhang, B. Li, High-resolution retinal imaging with micro adaptive optics system. Appl. Opt., vol. 50, no. 22, pp. 4365-4375, 2011. https://doi.org/10.1364/AO.50.004365.

H. Ma, Z. Liu, X. Xu, J. Chen, Simultaneous adaptive control of dual deformable mirrors for full-field beam shaping with the improved stochastic parallel gradient descent algorithm. Opt. Lett., vol. 38, no. 3, pp. 326-328, 2013. https://doi.org/10.1364/OL.38.000326.

R. Bastaits, D. Alaluf, M. Horodinca, I. Romanescu, I. Burda, G. Martic, G. Rodrigues, A. Preumont, Segmented bimorph mirrors for adaptive optics: Segment design and experiment. Appl. Opt., vol. 53, no. 29, pp. 6635-6642, 2014. https://doi.org/10.1364/AO.53.006635.

Bayanna, R. Louis, S. Chatterjee, S. Mathew, P. Venkatakrishnan, Membrane based deformable mirror: intrinsic aberrations and alignment issues. Appl. Opt., vol. 54, no. 7, pp. 1727-1736, 2015. https://doi.org/10.1364/AO.54.001727.

H. Ma, P. Zhou, X. Wang, Y. Ma, F. Xi, X. Xu, Z. Liu, Near-diffraction-limited annular flattop beam shaping with dual phase only liquid crystal spatial light modulators, Opt. Express, vol. 18, no. 8, pp. 8251-8260, 2010. https://doi.org/10.1364/OE.18.008251.

R. Tyson, B. Frazier, Field Guide to Adaptive Optics, 2nd ed., SPIE Press, Washington, 2012.

J. Hardy, Adaptive Optics for Astronomical Telescopes. Oxford University Press 1998, New York, USA, 1998.

F. Roddier, Adaptive Optics in Astronomy, Cambridge CB2, United Kingdom, 1999.

M. Chebbo, B.L. Roux, J.F. Sauvage, T. Fusco, Simulation of wavefront measurement and tomography for Extremely Large Telescope, Proc. of SPIE, vol. 7736, pp. 77364G, 2010. https://doi.org/10.1117/12.856387.

F. Rigaut, M. van Dam, Simulating Astronomical Adaptive Optics Systems Using Yao, Proceedings of the Third AO4ELT Conference, (2013).

F. Rigaut, M. van Dam, J. Cranney, S. Hippler, Yao an Adaptive Optics Simulation Package, http://github.com/frigaut/yao. (Accessed January 3, 2022).

R. Conan, C. Correia, Object-Oriented Matlab Adaptive Optics Toolbox, Proc. SPIE, vol. 9148, pp. 91486C, 2014. https://doi.org/10.1117/12.2054470.

R. Conan, Object-Oriented Matlab and Adaptive Optics, https://github.com/rconan/OOMAO. (Accessed January 3, 2022).

Reeves, Laser Guide Star Only Adaptive Optics: The Development of Tools and Algorithms for the Determination of Laser Guide Star Tip-Tilt. Durham University, United Kingdom, (2015).

Downloads

Published

2022-05-10

How to Cite

Mahmood K. Mirdan, Raaid N. Hassan, & Bushra Q. Al-Aboodi. (2022). MODELING AND COMPARISON OF CLOSED-LOOP AND OPENLOOP ADAPTIVE OPTICS SYSTEMS. European Scholar Journal, 3(5), 16-25. Retrieved from https://scholarzest.com/index.php/esj/article/view/2187

Issue

Vol. 3 No. 5 (2022): ESj

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.