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

Authors
Lindlein, N Pfund, J Schwider, J
Citation
N. Lindlein et al., Algorithm for expanding the dynamic range of a Shack-Hartmann sensor by using a spatial light modulator array, OPT ENG, 40(5), 2001, pp. 837-840
Citations number
7
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICAL ENGINEERING
ISSN journal
00913286 → ACNP
Volume
40
Issue
5
Year of publication
2001
Pages
837 - 840
Database
ISI
SICI code
0091-3286(200105)40:5<837:AFETDR>2.0.ZU;2-Y
Abstract
Normally, the dynamic range of a Shack-Hartmann sensor is limited by the fo ol leaving their respective subapertures, thus a definite attachment of the foci to their subapertures is difficult. By using an array of spatial ligh t 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 log(2) N+1 fram es to assign N spots unequivocal to their subapertures. (C) 2001 Society of Photo-Optical Instrumentation Engineers.