Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.113..233d&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 113, no. 2, July 1985, p. 233-247.
Astronomy and Astrophysics
Astronomy
3
Gamma Ray Astronomy, Imaging Techniques, Modulation, X Ray Astronomy, Astrometry, Collimators, Modulators, Multiplexing
Scientific paper
Various astronomical imaging systems use rotating grids as modulators and operate in the optical, X-ray, and gamma-ray regions. The position and strength of each measured source are encoded in a modulation pattern, produced by the imaging system. The mathematical expressions of the modulation patterns which permit efficient computer implementation are presented and a simple approximate expression is also given which facilitates the understanding of the basic properties of the modulation patterns. Although various modulation devices strongly differ in appearance, their modulation patterns show a remarkable similarity. This suggests that a unified approach is possible by analysing the output signals of these devices.
Dadurkevicius V.
Ralys D. A.
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