20 September 2016 Digital holography wavefront sensing in the pupil-plane recording geometry for distributed-volume atmospheric aberrations
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Abstract
Digital holography in the pupil-plane recording geometry shows promise as a wavefront sensor for use in adaptive-optics systems. Because current wavefront sensors suffer from decreased performance in the presence of turbulence and thermal blooming, there is a need for a more robust wavefront sensor in such distributed-volume atmospheric conditions. Digital holography fulfills this roll by accurately estimating the wrapped phase of the complex optical field after propagation through the atmosphere to the pupil plane of an optical system. This paper examines wave-optics simulations of spherical-wave propagation through both turbulence and thermal blooming; it also quantifies the performance of digital holography as a wavefront sensor by generating field-estimated Strehl ratios as a function of the number of pixels in the detector array, the Rytov number, and the Fried coherence diameter. Altogether the results indicate that digital holography wavefront sensing in the pupil-plane recording geometry is a valid and accurate method for estimating the wrapped phase of the complex optical field in the presence of distributed-volume atmospheric aberrations.
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Matthias T. Banet, Matthias T. Banet, Mark F. Spencer, Mark F. Spencer, Robert A. Raynor, Robert A. Raynor, Dan K. Marker, Dan K. Marker, } "Digital holography wavefront sensing in the pupil-plane recording geometry for distributed-volume atmospheric aberrations", Proc. SPIE 9982, Unconventional Imaging and Wavefront Sensing XII, 998208 (20 September 2016); doi: 10.1117/12.2235462; https://doi.org/10.1117/12.2235462
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