8 September 2017 Deep-turbulence wavefront sensing using digital holography in the on-axis phase shifting recording geometry
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Abstract
The effects of deep turbulence in long-range imaging applications presents unique challenges to properly measure and correct for aberrations incurred along the atmospheric path. In practice, digital holography can detect the path-integrated wavefront distortions caused by deep turbulence, and di erent recording geometries offer different benefits depending on the application of interest. Previous studies have evaluated the performance of the off-axis image and pupil plane recording geometries for deep-turbulence sensing. This study models digital holography in the on-axis phase shifting recording geometry using wave optics simulations. In particular, the analysis models spherical-wave propagation through varying deep-turbulence conditions to estimate the complex optical field, and performance is evaluated by calculating the field-estimated Strehl ratio and RMS wavefront error. Altogether, the results show that digital holography in the on-axis phase shifting recording geometry is an effective wavefront-sensing method in the presence of deep turbulence.
Conference Presentation
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Douglas E. Thornton, Mark F. Spencer, Glen P. Perram, "Deep-turbulence wavefront sensing using digital holography in the on-axis phase shifting recording geometry", Proc. SPIE 10410, Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2017, 1041004 (8 September 2017); doi: 10.1117/12.2273979; https://doi.org/10.1117/12.2273979
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