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Proceedings Paper

Detection and interpretation of high-frequency spatial interferograms
Author(s): Jesus Munoz; Marija Strojnik; Gonzalo Paez
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Paper Abstract

We analyze the detection and interpretation of high fringe-density interferograms with CCD cameras. The high spatial frequencies beyond the Nyquist frequency of the CCD elements are shown in the recorded interferogram as fringes of lesser density and reduced contrast. This is due to the large sampling interval and intensity averaging over the pixel. We develop an analytic expression for the detected modulation intensity. It is seen to contain the phase information in its partial derivatives. We perform a simulation with a set of phase-shifted interferograms detected with finite pixel size to recover the detected modulation intensity. The phase is compared with the analytic expression resulting in the maximum error of less than 0.02 percent demonstrating the feasibility of the proposed model.

Paper Details

Date Published: 8 February 2002
PDF: 10 pages
Proc. SPIE 4486, Infrared Spaceborne Remote Sensing IX, (8 February 2002); doi: 10.1117/12.455139
Show Author Affiliations
Jesus Munoz, Ctr. de Investigaciones en Optica, A.C. (Mexico)
Marija Strojnik, Ctr. de Investigaciones en Optica, A.C. (United States)
Gonzalo Paez, Ctr. de Investigaciones en Optica, A.C. (Mexico)

Published in SPIE Proceedings Vol. 4486:
Infrared Spaceborne Remote Sensing IX
Marija Strojnik; Bjorn F. Andresen, Editor(s)

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