Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986josaa...3.1908h&link_type=abstract
(International Commission for Optics Meeting Image Science '85, Helsinki, Finland, June 11-14, 1985) Optical Society of America,
Astronomy and Astrophysics
Astronomy
5
Image Reconstruction, Imaging Techniques, Interferometers, Spaceborne Astronomy, Speckle Patterns, Angular Resolution, Masks, Signal To Noise Ratios
Scientific paper
The construction of a large multiple-mirror interferometer in space is proposed. For example, at lambda of about 100 nm and with a baseline of 20 m, a resolution of 0.001 sec of arc can be obtained. At short UV wavelengths, a multiple-mirror interferometer will produce speckle interferograms caused by aberrations and deformations of the interferometer. From the speckle interferograms true diffraction-limited images can be reconstructed by various speckle methods. The speckle-masking method (triple correlation) is attractive since it yields true images with high signal-to-noise ratio. The limiting magnitude of interferometry in space is about 24. Digital simulations of image reconstruction from multiple-mirror interferometer data are shown. Photon noise corresponding to a mean photon count number of 10 counts per pixel was simulated.
Hofmann Karl Heinrich
Weigelt Gerd
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