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Proceedings Paper

Speckle Imaging : Description Of The Second Probability Density Function Of A Binary Star Speckle Pattern
Author(s): Claude Aime
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Paper Abstract

It is shown that the second probability density function of a stellar speckle pattern observed at the focus of a large telescope can be used for imaging double stars. For a given binary system, the number of detected photons required to establish the relative positions of the components is derived. It is shown that probability imaging can be performed in a reasonable observing time for average photon counting levels as low as 0.01 event per pixel. At such low light levels, the most significant indicator of the relative positions of the bright and weaker components is given by the simultaneous detection of a single photon event and a double photon event, with the events being spatially separated by a vector corresponding to the separation of the two stars. Under these conditions, this result has repercussions on the design requirements of a two-dimensional photon-counting detector used for probability imaging applications.

Paper Details

Date Published: 10 September 1987
PDF: 5 pages
Proc. SPIE 0808, Inverse Problems in Optics, (10 September 1987); doi: 10.1117/12.941456
Show Author Affiliations
Claude Aime, Departement d'Astrophysique de l'I.M.S.P. (France)


Published in SPIE Proceedings Vol. 0808:
Inverse Problems in Optics
Edward Roy Pike, Editor(s)

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