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Applied Optics

Applied Optics


  • Vol. 44, Iss. 23 — Aug. 10, 2005
  • pp: 4838–4845

Sorting method to extend the dynamic range of the Shack–Hartmann wave-front sensor

Junwon Lee, Roland V. Shack, and Michael R. Descour  »View Author Affiliations

Applied Optics, Vol. 44, Issue 23, pp. 4838-4845 (2005)

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We propose a simple and powerful algorithm to extend the dynamic range of a Shack–Hartmann wave-front sensor. In a conventional Shack–Hartmann wave-front sensor the dynamic range is limited by the f-number of a lenslet, because the focal spot is required to remain in the area confined by the single lenslet. The sorting method proposed here eliminates such a limitation and extends the dynamic range by tagging each spot in a special sequence. Since the sorting method is a simple algorithm that does not change the measurement configuration, there is no requirement for extra hardware, multiple measurements, or complicated algorithms. We not only present the theory and a calculation example of the sorting method but also actually implement measurement of a highly aberrated wave front from nonrotational symmetric optics.

© 2005 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(350.4800) Other areas of optics : Optical standards and testing

Original Manuscript: February 2, 2005
Revised Manuscript: March 18, 2005
Manuscript Accepted: March 24, 2005
Published: August 10, 2005

Junwon Lee, Roland V. Shack, and Michael R. Descour, "Sorting method to extend the dynamic range of the Shack–Hartmann wave-front sensor," Appl. Opt. 44, 4838-4845 (2005)

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