Time-varying phase diversity turbulence compensation

Adam W. M. van Eekeren; Klamer Schutte; Judith Dijk; Piet B. W. Schwering

doi:10.1117/12.884580

20 May 2011 Time-varying phase diversity turbulence compensation

Adam W. M. van Eekeren, Klamer Schutte, Judith Dijk, Piet B. W. Schwering

Proceedings Volume 8012, Infrared Technology and Applications XXXVII; 80120D (2011) https://doi.org/10.1117/12.884580
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

Long range object identi¯cation needs visual identi¯cation over large distances. However, atmospheric turbulence does hinder long range imaging. Therefore it is crucial to compensate the visual artifacts due to atmospheric turbulence. In this paper we propose a new method to compensate these turbulence e®ects, thus enabling identi¯cation at larger distances. Our method is based on applying phase diversity imaging by a wavefront modulator in free-running mode. As we have no feedback loop, we can simultaneously compensate turbulence for multiple isoplanatic angles. The wavefront modulator generates several images with known additional wave front aberrations. This extra information allows us to locally estimate the optimal wave front aberration and thus the optimal - turbulence free - image can be derived. This paper provides results on simulated data showing that this method performs well under realistic turbulence and noise conditions. Furthermore the robustness of the proposed method is shown for varying algorithmic settings.

Citation Download Citation

Adam W. M. van Eekeren, Klamer Schutte, Judith Dijk, and Piet B. W. Schwering "Time-varying phase diversity turbulence compensation", Proc. SPIE 8012, Infrared Technology and Applications XXXVII, 80120D (20 May 2011); https://doi.org/10.1117/12.884580

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