Field Experimental Results Using Phase Diversity on a Binary Star

Details Field Experimental Results Using Phase Diversity on a Binary Star Field Experimental Results Using Phase Diversity on a Binary Star

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996stin...9712910c&link_type=abstract

Technical Report, Phillips Lab. Kirtland AFB, NM United States Laser and Imaging Directorate

Physics

Optics

Binary Stars, Optical Transfer Function, Image Reconstruction, Phase Deviation, Optical Measurement, Conjugate Gradient Method, Adaptive Optics, Imaging Techniques, Nonlinear Programming, Algorithms, Telescopes, Automatic Control, Interferometers, Mathematical Models, Image Processing, Wave Fronts, Iterative Solution

Scientific paper

This report describes the optical imaging of a binary star using a phase diversity technique. The two stars of the binary star mu Scorpio, with a separation of 1.1 arc seconds, were successfully resolved. The data was taken at the Air Force Maui Optical Site (AMOS) atop Mount Haleakala, Maui, Hawaii, using the 81 centimeter, Beam Director Telescope (BDT). First, a detailed theoretical description of phase diversity to lay the foundations for the experimental effort is presented. Then the phase diversity algorithm is formulated in the context of nonlinear programming where a metric is developed and then minimized. We solve for the Zernike coefficients directly using nonlinear optimization techniques. Detailed discussion of the experimental implementation is described. Phase diversity was used on in-focus and out-of-focus images to extract the complete system Optical Transfer function (OTF). Finally, a parametric Wiener filter was used to get the final reconstructed image.

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