Long Exposure Point Spread Function Estimation from Adaptive Optics Loop Data

Details Long Exposure Point Spread Function Estimation from Adaptive Optics Loop Data Long Exposure Point Spread Function Estimation from Adaptive Optics Loop Data

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsp51a..01m&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SP51A-01

Physics

Optics

0649 Optics, 7594 Instruments And Techniques

Scientific paper

Current work in Solar Physics requires high resolution observations from ground based telescopes. However, the performance of any ground based telescope is ultimately limited by optical aberrations produced by atmospheric turbulence. Adaptive Optics (AO) is a powerful tool that artially corrects for these optical aberrations in real time, considerately improving the image quality. Wavefront sensor and mirror data produced by the AO system during closed loop operation contains information about correction performance and seeing conditions. We present a method to estimate the Long Exposure Point Spread Function (LEPSF) of the AO corrected image using AO loop data. This estimation can then be used to improve image quality using deconvolution post-processing techniques. In Solar Physics observations seeing conditions are highly variable. Thus, an estimation of the LEPSF is only useful if it corresponds to the exact time an image was taken. LEPSFs produced by this method are simultaneous with the captured AO corrected image. We will apply this method to time series of intensity images, velocity maps and line of sight magnetic field of sunspots and pores. Obtaining high resolution AO and post-facto corrected data with homogeneous image quality and more reliable quantitative measurements.

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