Simulations of atmospheric anisoplanatism effects on laser-sheared beam imaging

Keith A. Bush; Calvin C. Barnard; David G. Voelz

doi:10.1117/12.254184

14 October 1996 Simulations of atmospheric anisoplanatism effects on laser sheared-beam imaging

Keith A. Bush, Calvin C. Barnard, David G. Voelz

Proceedings Volume 2828, Image Propagation through the Atmosphere; (1996) https://doi.org/10.1117/12.254184
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

Sheared beam imaging (SBI) is a coherent active imaging technique that employs a pupil-plane phase difference measurement approach to overcome the perturbing effects of atmospheric turbulence. The technique has shown promise for applications such as imaging satellites from ground-based sites. However, atmospheric compensation is dependent on the effective atmospheric isoplanatic patch size; which mines that degradations can occur for larger objects. We present theory and simulation results that demonstrate this limitation and we suggest approaches to reduce the residual degradations caused by anisoplanatism. Our simulations use wave optics propagation through phase screens to model atmospheric turbulence effects.

Citation Download Citation

Keith A. Bush, Calvin C. Barnard, and David G. Voelz "Simulations of atmospheric anisoplanatism effects on laser sheared-beam imaging", Proc. SPIE 2828, Image Propagation through the Atmosphere, (14 October 1996); https://doi.org/10.1117/12.254184

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