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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 28 — Oct. 1, 2008
  • pp: 5155–5162

Study of a MEMS-based Shack–Hartmann wavefront sensor with adjustable pupil sampling for astronomical adaptive optics

Christoph Baranec and Richard Dekany  »View Author Affiliations

Applied Optics, Vol. 47, Issue 28, pp. 5155-5162 (2008)

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We introduce a Shack–Hartmann wavefront sensor for adaptive optics that enables dynamic control of the spatial sampling of an incoming wavefront using a segmented mirror microelectrical mechanical systems (MEMS) device. Unlike a conventional lenslet array, subapertures are defined by either segments or groups of segments of a mirror array, with the ability to change spatial pupil sampling arbitrarily by redefining the segment grouping. Control over the spatial sampling of the wavefront allows for the minimization of wavefront reconstruction error for different intensities of guide source and different atmospheric conditions, which in turn maximizes an adaptive optics system’s delivered Strehl ratio. Requirements for the MEMS devices needed in this Shack–Hartmann wavefront sensor are also presented.

© 2008 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.7350) Atmospheric and oceanic optics : Wave-front sensing
(220.2740) Optical design and fabrication : Geometric optical design

ToC Category:
Atmospheric and Oceanic Optics

Original Manuscript: July 30, 2008
Manuscript Accepted: September 2, 2008
Published: September 25, 2008

Christoph Baranec and Richard Dekany, "Study of a MEMS-based Shack-Hartmann wavefront sensor with adjustable pupil sampling for astronomical adaptive optics," Appl. Opt. 47, 5155-5162 (2008)

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