Two deformable mirrors with finite conjugate ranges are investigated for compensating amplitude and phase distortions due to laser propagation through turbulent atmospheres. Simulations are performed based on Adaptive Optics (AO) for an Airborne Laser (ABL)-type scenario. The Strehl ratio, the number of branch points in deformable mirror (DM) controls, and the number of iterations to convergence are used as figures of merit to evaluate performance of the Sequential Generalized Projection Algorithm (SGPA) that generates ...
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Two deformable mirrors with finite conjugate ranges are investigated for compensating amplitude and phase distortions due to laser propagation through turbulent atmospheres. Simulations are performed based on Adaptive Optics (AO) for an Airborne Laser (ABL)-type scenario. The Strehl ratio, the number of branch points in deformable mirror (DM) controls, and the number of iterations to convergence are used as figures of merit to evaluate performance of the Sequential Generalized Projection Algorithm (SGPA) that generates mirror commands. The Strehl ratio and the number of branch points are plotted versus the log-amplitude variance (also known as the Rytov parameter), the conjugate range of the second deformable mirror, and the radii of the deformable mirrors. Also, the number of iterations is plotted versus the Rytov parameter and the conjugate range of the second deformable mirror. The results are ensemble averages over 32 realizations of the scintillated test fields for each value of the Rytov parameter within the test scenario. The Gaussian beam shape that optimizes the Strehl ratio is determined. The least squares two-DM Strehl, phase-only Strehl, least squares phase-only Strehl, and uncompensated Strehl are also determined for comparison. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
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New. Trade paperback (US). Glued binding. 104 p. In Stock. 100% Money Back Guarantee. Brand New, Perfect Condition, allow 4-14 business days for standard shipping. To Alaska, Hawaii, U.S. protectorate, P.O. box, and APO/FPO addresses allow 4-28 business days for Standard shipping. No expedited shipping. All orders placed with expedited shipping will be cancelled. Over 3, 000, 000 happy customers.
