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Proceedings Paper

Optical fringe formation in Michelson stellar interferometry
Author(s): Victor L. Gamiz
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Paper Abstract

We examine the pairwise fringe formation process for Michelson stellar interferometry, focusing specifically on how the complex fringe visibility degrades with spatial sub-aperture decorrelations. The fringe intensity is formulated for spatially incoherent sources, radiating or re-radiating, thermal light over a spectral interval where the quasi-monochromatic and crossspectral purity approximations can be invoked. The imaging geometry is such that the source in distant enough to use the far-field approximation, and that a unique optical transfer function exists consistent with isoplanatic, or equivalently, linearly shift invariant imaging systems. It is shown that the complex fringe visibility is functionally dependent on the optical transfer function although the stellar interferometer does not form an image directly as would conventional imaging. The complex visibility is derived from the fringe intensity. Three forms of the complex visibility are developed and each formulation is interpreted.

Paper Details

Date Published: 7 September 2006
PDF: 18 pages
Proc. SPIE 6307, Unconventional Imaging II, 63070C (7 September 2006); doi: 10.1117/12.683224
Show Author Affiliations
Victor L. Gamiz, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 6307:
Unconventional Imaging II
Victor L. Gamiz; Paul S. Idell; Marija S. Strojnik, Editor(s)

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