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Optical Engineering

Expansion of the dynamic range of a Shack-Hartmann sensor by using astigmatic microlenses
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Paper Abstract

The dynamic range of a Shack-Hartmann sensor is normally limited by the fact that the foci can leave their subapertures and so a definite attachment of the foci to their subapertures is difficult. One method for solving this problem is to give the focal spots a kind of label to identify them even if they leave their subaperture. We describe how the dynamic range of a Shack-Hartmann sensor can be expanded by using lenses with well-defined astigmatism. We also derive a relation between the spot displacements and the partial derivatives of the wavefront for large wavefront slopes.

Paper Details

Date Published: 1 August 2000
PDF: 6 pages
Opt. Eng. 39(8) doi: 10.1117/1.1304846
Published in: Optical Engineering Volume 39, Issue 8
Show Author Affiliations
Norbert Lindlein, Univ. Erlangen-Nuernberg (Germany)
Johannes Pfund, Univ. Erlangen-Nuernberg (Germany)
Johannes Schwider, Univ. Erlangen-Nuernberg (Germany)


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