Sharpness-based correction methods in holographic aperture ladar (HAL)

Wesley E. Farriss; James R. Fienup; Jason W. Stafford; Nicholas J. Miller

doi:10.1117/12.2320630

16 November 2018 Sharpness-based correction methods in holographic aperture ladar (HAL)

Wesley E. Farriss, James R. Fienup, Jason W. Stafford, Nicholas J. Miller

Proceedings Volume 10772, Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2018; 107720K (2018) https://doi.org/10.1117/12.2320630
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

Turbulence mitigation has long been a challenge in long-distance imaging systems. Holographic aperture ladar (HAL), a multiwavelength spatio-temporal heterodyne 3D imaging modality, is also vulnerable to the deleterious effects of volumetric turbulence along the path of propagation. In this work, we develop a sharpness-maximization turbulence mitigation algorithm using a single phase plane approximation to volumetric turbulence. We show preliminary results that simulated HAL fields aberrated by a single turbulent phase screen, coincident with the pupil, are well corrected using this sharpness-maximization algorithm for turbulence profiles with D/r₀ values of up to 50.

Conference Presentation

Citation Download Citation

Wesley E. Farriss, James R. Fienup, Jason W. Stafford, and Nicholas J. Miller "Sharpness-based correction methods in holographic aperture ladar (HAL)", Proc. SPIE 10772, Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2018, 107720K (16 November 2018); https://doi.org/10.1117/12.2320630

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