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Optics Letters

Optics Letters


  • Vol. 25, Iss. 15 — Aug. 1, 2000
  • pp: 1083–1085

Closed-loop aberration correction by use of a modal Zernike wave-front sensor

M. A. A. Neil, M. J. Booth, and T. Wilson  »View Author Affiliations

Optics Letters, Vol. 25, Issue 15, pp. 1083-1085 (2000)

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We describe the practical implementation of a closed-loop adaptive-optics system incorporating a novel modal wave-front sensor. The sensor consists of a static binary-phase computer-generated holographic element, which generates a pattern of spots in a detector plane. Intensity differences between symmetric pairs of these spots give a direct measure of the Zernike mode amplitudes that are present in the input wave front. We use a ferroelectric liquid-crystal spatial light modulator in conjunction with a 4–f system and a spatial filter as a wave-front correction element. We present results showing a rapid increase in Strehl ratio and focal spot quality as the system corrects for deliberately introduced aberrations.

© 2000 Optical Society of America

OCIS Codes
(090.1000) Holography : Aberration compensation

M. A. A. Neil, M. J. Booth, and T. Wilson, "Closed-loop aberration correction by use of a modal Zernike wave-front sensor," Opt. Lett. 25, 1083-1085 (2000)

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  1. J. W. Hardy, Adaptive Optics for Astronomical Telescopes (Oxford U. Press, Oxford, 1998).
  2. R. K. Tyson, Principles of Adaptive Optics (Academic, London, 1991).
  3. M. A. A. Neil, M. J. Booth, and T. Wilson, J. Opt. Soc. Am. A 17, 1098 (2000).
  4. V. N. Mahajan, Appl. Opt. 5, 8121 (1994).
  5. M. A. A. Neil, M. J. Booth, and T. Wilson, Opt. Lett. 23, 1849 (1998).
  6. M. A. A. Neil, T. Wilson, and R. Juškaitis, J. Microsc. (Oxford) 197, 219 (2000).

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