Effects of shock-related discontinuities on SHWFS measurements: modeling and simulation

Matthew Kalensky; Matthew R. Kemnetz; Mark F Spencer

doi:10.1117/12.2633526

4 October 2022 Effects of shock-related discontinuities on SHWFS measurements: modeling and simulation

Matthew Kalensky, Matthew R. Kemnetz, Mark F Spencer

Proceedings Volume 12239, Unconventional Imaging and Adaptive Optics 2022; 122390J (2022) https://doi.org/10.1117/12.2633526
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Shock waves result from turning supersonic or locally supersonic flow and result in a large change in gas properties downstream of the shock. This change in gas properties, namely, the large increase in freestream density can affect the wavefront of a laser beam propagating through the shock. In this paper, analytic expressions are developed to describe the effects of these shock waves on the wavefront a laser beam propagating through the shock both parallel and on an angle relative to the shock direction. Furthermore, these near-field disturbances are then brought to a focus at the image-plane using a thin lens transmittance function with the Fresnel diffraction integral. The effects of the near-field disturbances imposed by the shock on the image-plane irradiance patterns are investigated and the implications of these image-plane irradiance patterns on Shack-Hartmann wavefront sensor measurements are also discussed.

Conference Presentation

Citation Download Citation

Matthew Kalensky, Matthew R. Kemnetz, and Mark F Spencer "Effects of shock-related discontinuities on SHWFS measurements: modeling and simulation", Proc. SPIE 12239, Unconventional Imaging and Adaptive Optics 2022, 122390J (4 October 2022); https://doi.org/10.1117/12.2633526

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