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Optical Engineering

Experimental results for expanding the dynamic range of a Shack-Hartmann sensor by using astigmatic microlenses
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Paper Abstract

A conventional Shack-Hartmann wavefront sensor cannot be used for the measurement of wavefronts with steep slopes if the spots leave their respective subapertures. In an earlier paper [N. Lindlein, J. Pfund, and J. Schwider, ''Expansion of the dynamic range of a Shack- Hartmann sensor by using astigmatic microlenses," Opt. Eng. 39(8), 2220-2225 (2000)], we described a method to expand the dynamic range of a Shack-Hartmann wavefront sensor by marking the spots using astigmatic microlenses. We present experimental results for this method and describe how this special sensor can be interpreted as a combination of several Shack-Hartmann sensors with enlarged subapertures.

Paper Details

Date Published: 1 February 2002
PDF: 5 pages
Opt. Eng. 41(2) doi: 10.1117/1.1430724
Published in: Optical Engineering Volume 41, Issue 2
Show Author Affiliations
Norbert Lindlein, Friedrich-Alexander Univ. Erlangen-Nuernberg (Germany)
Johannes Pfund, Friedrich-Alexander Univ. Erlangen-Nuernberg (Germany)

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