Closed-loop wave-front correction using phase diversity

Details Closed-loop wave-front correction using phase diversity Closed-loop wave-front correction using phase diversity

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3356..844k&link_type=abstract

Proc. SPIE Vol. 3356, p. 844-853, Space Telescopes and Instruments V, Pierre Y. Bely; James B. Breckinridge; Eds.

Physics

Scientific paper

Closed loop wave front correction of low order Zernike polynomials has been demonstrated using a phase diversity wavefront sensor. The Lockheed-Martin Advanced Technology Center phase diversity brassboard was used to demonstrate low bandwidth correction of aberrations consisting of the Zernike polynomials describing focus, coma and spherical. The method of Lofdahl-Scharmer is used to estimate and correct fixed aberrations in an optical system. The General Regression Neural Network method is used to estimate slowly varying aberrations in the same optical system. Closed loop experimental results from these tests are presented.

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