Experimental evaluation of differential OTF (dOTF) wavefront sensing

Johanan L. Codona; Nathan Doble

doi:10.1117/12.927025

13 September 2012 Experimental evaluation of differential OTF (dOTF) wavefront sensing

Johanan L. Codona, Nathan Doble

Proceedings Volume 8447, Adaptive Optics Systems III; 84476R (2012) https://doi.org/10.1117/12.927025
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

dOTF is an image-based non-iterative technique for measuring the complex pupil field. The technique relies on the difference between two PSF images when a small modification is introduced near the pupil's edge. The nature of the modification is of minor importance and can consist of a transmission blockage or a phase shift introduced by poking a single DM actuator. Even without calibration, dOTF yields an accurate estimate of the complex amplitude over the pupil plane. We experimentally evaluate the technique in several different optical systems, using both transmission and phase modifications to the pupil, monochromatic and broadband light sources, and different modification areas and poke depths.

Citation Download Citation

Johanan L. Codona and Nathan Doble "Experimental evaluation of differential OTF (dOTF) wavefront sensing", Proc. SPIE 8447, Adaptive Optics Systems III, 84476R (13 September 2012); https://doi.org/10.1117/12.927025

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