Characterization of turbulent atmospheric-induced optical distortion by passive phase diversity techniques

Lewis F. DeSandre; Peter Langston; Joni M. Pentony; C. Denton Marrs; Albert A. Ogloza

doi:10.1117/12.438175

4 September 2001 Characterization of turbulent atmospheric-induced optical distortion by passive phase diversity techniques

Lewis F. DeSandre, Peter Langston, Joni M. Pentony, C. Denton Marrs, Albert A. Ogloza

Author Affiliations +

Proceedings Volume 4376, Laser Weapons Technology II; (2001) https://doi.org/10.1117/12.438175
Event: Aerospace/Defense Sensing, Simulation, and Controls, 2001, Orlando, FL, United States

Abstract

Optical fields propagation through the Earth's turbulent atmosphere are subject to time varying phase distortions. These phase distortions place severe limitations on electro- optical systems, such as imaging, tracking and vibrometry sensors. The generation of artificial beacons by laser backscatter (guide stars) for wavefront sensing may not be acceptable and natural beacons for wavefront sensing may not be available. Diversity techniques, however, allow passive wavefront measurement of the aberrated wavefront. This paper reports a phase diversity method based upon the transport- of-intensity equation for recovering phase from irradiance measurements. Digitized intensity data over a rectangular array of data is expanded into Zernike polynomials and a matrix method used to solve the transport-of-intensity equation. The phase diversity technique is evaluated in the pupil as well as the focal plane. Simulation and experimental data is provided.

Citation Download Citation

Lewis F. DeSandre, Peter Langston, Joni M. Pentony, C. Denton Marrs, and Albert A. Ogloza "Characterization of turbulent atmospheric-induced optical distortion by passive phase diversity techniques", Proc. SPIE 4376, Laser Weapons Technology II, (4 September 2001); https://doi.org/10.1117/12.438175

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