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Proceedings Paper

Beyond image cubes: an agile lamp for practical 100% photon-efficient spectral imaging
Author(s): Peter J. Miller; Richard M. Levenson
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Paper Abstract

Hardware for obtaining spectral image cubes using filters or interferometers, though capable of revealing subtle aspects of composition, is typically expensive, bulky, slow, and often provides poor spatial resolution. In addition, a great deal of computer processing is needed to extract information from the raw data: interferometers must perform FFTs on megapixel data sets; all approaches involve calculations of spectral indices in order to classify or analyze the scene into its components. Consequently, spectral imaging techniques have been adopted only be a small, pioneering community. We report on a novel agile lamp for imaging which produces illumination having any desired spectral flux distribution ranging from pure spectral bands to precisely-tailored, complex polychromatic functions. This lamp, together with a CCD camera, is suitable for use in most spectral imaging applications, and by enabling one to directly image the scene in the spectral measure of interest, it eliminates the need for computer processing. Using matched filtering, one can obtain full information from all spectral bands in a handful of exposures with optimal signal-to-noise. The lamp is long-lived and spectrally stable. It will be affordable, compact, and rugged, and its spectral output can be adjusted within one millisecond. Finally, as there is no interferometer or other optics involved, imaging is 100% photon-efficient. Use of spectrally agile lamps in various multispectral applications is expected.

Paper Details

Date Published: 2 July 2001
PDF: 7 pages
Proc. SPIE 4259, Biomarkers and Biological Spectral Imaging, (2 July 2001); doi: 10.1117/12.432485
Show Author Affiliations
Peter J. Miller, Cambridge Research & Instrumentation, Inc. (United States)
Richard M. Levenson, Cambridge Research & Instrumentation, Inc. (United States)

Published in SPIE Proceedings Vol. 4259:
Biomarkers and Biological Spectral Imaging
Gregory H. Bearman; Darryl J. Bornhop; Darryl J. Bornhop; Richard M. Levenson, Editor(s)

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