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Proceedings Paper

Phase-difference variance measurements of a coherent amplitude interferometer at low light levels
Author(s): Douglas B. Rider; David G. Voelz; Keith A. Bush; Eric P. Magee
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Paper Abstract

The ability to accurately measure the phase of the wavefront in an amplitude interferometer is fundamentally limited by the light level. Under high light conditions, the variance of the phase measurement is inversely proportional to the number of photons detected. In this paper, we review the basic theory of phase measurement for an optical heterodyne array imaging system for high light conditions. The theory is then extended to a sheared coherent interferometric photography (SCIP) system. Simulation and laboratory results verifying the theory and extending it to low light levels are then presented.

Paper Details

Date Published: 9 November 1993
PDF: 11 pages
Proc. SPIE 2029, Digital Image Recovery and Synthesis II, (9 November 1993); doi: 10.1117/12.161992
Show Author Affiliations
Douglas B. Rider, Air Force Phillips Lab. (United States)
David G. Voelz, Air Force Phillips Lab. (United States)
Keith A. Bush, Logicon R&D Associates (United States)
Eric P. Magee, Phillips Lab. (United States)


Published in SPIE Proceedings Vol. 2029:
Digital Image Recovery and Synthesis II
Paul S. Idell, Editor(s)

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