Branch point detection in SMASH measurements using second-moment wavefront sensor statistics

Denis W. Oesch; Matthew Kalensky; Michael S. Sexauer

doi:10.1117/12.3027213

7 October 2024 Branch point detection in SMASH measurements using second-moment wavefront sensor statistics

Denis W. Oesch, Matthew Kalensky, Michael S. Sexauer

Proceedings Volume 13149, Unconventional Imaging, Sensing, and Adaptive Optics 2024; 131490Z (2024) https://doi.org/10.1117/12.3027213
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

Branch points are seen in many adaptive optical experiments where the sensed beam has propagated over an extended path, through sufficiently strong turbulence. It has been shown that branch points provide information on how the turbulence responsible for their formation is distributed and moving along the path. Shack-Hartmann wave front sensors have previously been somewhat limited in their ability to fully capture the branch points present within their measurements. A new technique for the detection of branch points based on the second moment statistics of the individual spots in images created with a Shack-Hartmann wave front sensor system is examined. Data collected by Small Mobile Atmospheric Sensing Hartmann (SMASH) units are used to test the method under a range of turbulence conditions. The results of the second moment technique are compared with the standard elementary circulation method.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Denis W. Oesch, Matthew Kalensky, and Michael S. Sexauer "Branch point detection in SMASH measurements using second-moment wavefront sensor statistics", Proc. SPIE 13149, Unconventional Imaging, Sensing, and Adaptive Optics 2024, 131490Z (7 October 2024); https://doi.org/10.1117/12.3027213

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