Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...175..312m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 175, no. 1-2, March 1987, p. 312-318.
Astronomy and Astrophysics
Astrophysics
5
Convolution Integrals, High Resolution, Hubble Space Telescope, Image Resolution, Speckle Patterns, Diffraction Limited Cameras, Digital Techniques, Interferometry, Signal To Noise Ratios, Ultraviolet Photography
Scientific paper
Roll deconvolution is a speckle method that can improve the resolution of the 2.4-m Hubble Space Telescope (HST) at short UV wavelengths. A diffraction-limited image can be digitally reconstructed from two aberration-degraded images recorded at two different roll angles of the HST. The reconstruction is performed by complex inverse filtering of the two degraded images. The authors show optical-digital simulations that illustrate how the signal-to-noise ratio of the reconstruction depends on photon noise, on the structure of the point-spread function and on other parameters. The roll deconvolution technique can be applied to HST data recorded with the ƒ/288-mode of the Faint Object Camera. At λ = 140 nm a resolution of 0arcsec.015 can be obtained.
Mueller Marcus
Weigelt Gerd
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