High resolution optical imaging through the atmosphere

Details High resolution optical imaging through the atmosphere High resolution optical imaging through the atmosphere

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989sao..rept.....n&link_type=abstract

Final Report, 1 Feb. 1986 - 30 Sep. 1989 Smithsonian Astrophysical Observatory, Cambridge, MA.

Physics

Optics

Adaptive Optics, High Resolution, Image Reconstruction, Imaging Techniques, Mathematical Models, Radio Sources (Astronomy), Speckle Patterns, Atmospheric Circulation, Faint Objects, Image Intensifiers, Specular Reflection, Stellar Luminosity, Supernova 1987A, Turbulence, Wave Fronts

Scientific paper

This program has concentrated on three major areas: the application of high angular resolution image reconstruction techniques to the reconstruction of solar surface features; speckle imaging of a wide range of astronomical sources; and the implementation of adaptive optics for faint object imaging. Substantial modifications were made to a technique for reconstruction of high resolution images from single short exposure solar frames, blind iterative deconvolution (IDC). These improvements were tested using numerical simulation data. Analysis of speckle data of the supernova SN1987A has detected a new bright source, 0.9 arcseconds south of the SN, as well as substantial structure in the region surrounding the SN. New results were obtained on several Young Stellar Objects and supergiants. In the area of adaptive optics, an AOA wavefront sensor has been set up and tested using an image intensifier which increases its sensitivity by three orders of magnitude. Faint object image active tilt correction was also tested with some important enhancements, including new highly linear and sensitive CCD quad cells developed by Cal Tech and Tektronix, and an off-the-shelf high speed 2-D tilting mirror with greatly improved specifications. The effects of only partially correcting atmospheric turbulence have been theoretically analyzed and numerically simulated.

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