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Calibrating a high-Esolution wavefront corrector with a static focal-Plane camera

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Author: Korkiakoski, V. · Doelman, N.J. · Codona, J. · Kenworthy, M. · Otten, G. · Keller, C.U.
Type:article
Date:2013
Source:Applied Optics, 31, 52, 7554-7563
Identifier: 484277
doi: doi:10.1364/AO.52.007554
Keywords: Electronics · Corrector elements · High resolution · Imaging optics · Sensing algorithms · Spatial light modulators · Spatial resolution · Static cameras · Wavefront corrector · Light modulators · Optical transfer function · Vision aids · High Tech Systems & Materials · Industrial Innovation · Mechatronics, Mechanics & Materials · OM - Opto-Mechatronics · TS - Technical Sciences

Abstract

We present a method to calibrate a high-resolution wavefront (WF)-correcting device with a single, static camera, located in the focal-plane; no moving of any component is needed. The method is based on a localized diversity and differential optical transfer functions to compute both the phase and amplitude in the pupil plane located upstream of the last imaging optics. An experiment with a spatial light modulator shows that the calibration is sufficient to robustly operate a focal-plane WF sensing algorithm controlling a WF corrector with 40,000 degrees of freedom. We estimate that the locations of identical WF corrector elements are determined with a spatial resolution of 0.3% compared to the pupil diameter. © 2013 Optical Society of America.