Remaining distortions, conditioned dimension of guide source

V. P. Lukin

doi:10.1117/12.2069082

5 November 2014 Remaining distortions, conditioned dimension of guide source

V. P. Lukin

Proceedings Volume 9242, Remote Sensing of Clouds and the Atmosphere XIX; and Optics in Atmospheric Propagation and Adaptive Systems XVII; 92421X (2014) https://doi.org/10.1117/12.2069082
Event: SPIE Remote Sensing, 2014, Amsterdam, Netherlands

Abstract

Efficiency of the adaptive focusing of coherent laser beam of radiation in a turbulent atmosphere is examined. The calculation of distributing of averaged intensity of the field of coherent laser beam, focused in a turbulent media at the use of adaptive phase correction with the use of image of non-coherent source as a guide source is executed. We will mark that for effective work of wave-front cross-correlation sensor at track it is necessary to use maximally small in size, but contrasting display element. From the analysis of the theoretical expression easily to conclude that for vertical atmospheric paths, taking as a size of effective object of track the minimum settled object at a short exposure, such object can be counted practically by a point object. And he can be effectively used for the correction of phase. In an atmosphere on extensive paths strong aerosol scattering of image of guide source is possible and only extensive enough object, i.e., an object, having low spatial frequencies (LSF), will be visible contrastingly on a background other objects. It is related to that frequency-contrast characteristic of aerosol atmosphere has maximum in the area LSF and falls on spatial high-frequencies.

Citation Download Citation

V. P. Lukin "Remaining distortions, conditioned dimension of guide source", Proc. SPIE 9242, Remote Sensing of Clouds and the Atmosphere XIX; and Optics in Atmospheric Propagation and Adaptive Systems XVII, 92421X (5 November 2014); https://doi.org/10.1117/12.2069082

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