Speckle masking in astronomy - Triple correlation theory and applications

Details Speckle masking in astronomy - Triple correlation theory and applications Speckle masking in astronomy - Triple correlation theory and applications

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apopt..22.4028l&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 22, Dec. 15, 1983, p. 4028-4037. Research supported by the Deutsche Forschungsgemeinschaft

Physics

Optics

350

Astronomical Photography, Image Reconstruction, Interferometry, Masking, Speckle Patterns, Spectral Correlation, Algorithms, Angular Resolution, Fourier Transformation, High Resolution, Image Processing, Telescopes

Scientific paper

Due to the turbulent atmosphere the resolution of conventional astrophotography is limited to ≡1 sec of arc. However, the speckle-masking method can yield diffraction-limited resolution, i.e., 0.03 sec of arc with a 3.6-m telescope. Speckle masking yields true images of general astronomical objects. No point source is required in the isoplanatic field of the object. The authors present the theory of speckle masking; it makes use of triple correlations and their Fourier counterparts, the bispectra. They show algorithms for the recovery of the object from genuine astronomical bispectra data.

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