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Proceedings Paper

Birefringent Fourier-transform imaging spectrometer
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Paper Abstract

We have previously shown those circumstances for which the multiplex advantage of temporally scanned Fourier transform imaging spectrometers enables higher signal-to-noise ratios than other techniques. Unfortunately, for many real-life applications, such as aerial reconnaissance, deployment of FT instruments based on traditional moving-mirror interferometers is problematic due to their inherent sensitivity to vibration. We will describe a new type of Fourier transform imaging spectrometer, employing moving birefringent prisms to create the necessary path difference modulations. This new system retains the accepted sensitivity advantages of traditional Fourier transform devices, but because it employs common-path interferometry and because path differences are introduced within a single optical element, the system is inherently very robust. Furthermore, the precision of the movement can be typically two orders of magnitude lower than for a traditional two-beam interferometer, resulting in a simpler instrument. Experimental results will be presented.

Paper Details

Date Published: 8 November 2002
PDF: 10 pages
Proc. SPIE 4816, Imaging Spectrometry VIII, (8 November 2002); doi: 10.1117/12.451611
Show Author Affiliations
David William Fletcher-Holmes, Heriot-Watt Univ. (United Kingdom)
Andrew Robert Harvey, Heriot-Watt Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 4816:
Imaging Spectrometry VIII
Sylvia S. Shen, Editor(s)

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