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Optical Engineering

Algorithm for expanding the dynamic range of a Shack-Hartmann sensor by using a spatial light modulator
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Paper Abstract

Normally, the dynamic range of a Shack-Hartmann sensor is limited by the foci leaving their respective subapertures, thus a definite attachment of the foci to their subapertures is difficult. By using an array of spatial light modulators in front of the microlenses of the sensor to switch on and off the subapertures, a definite assignment of the spots to their subapertures is possible. We present a coding algorithm that needs only log2N+1 frames to assign N spots unequivocal to their subapertures.

Paper Details

Date Published: 1 May 2001
PDF: 4 pages
Opt. Eng. 40(5) doi: 10.1117/1.1357193
Published in: Optical Engineering Volume 40, Issue 5
Show Author Affiliations
Norbert Lindlein, Friedrich-Alexander Univ. Erlangen-Nuermberg (Germany)
Johannes Pfund, Univ. Erlangen-Nuernberg (Germany)
Johannes Schwider, Friedrich-Alexander Univ. Erlangen-Nuernberg (Germany)

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