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Proceedings Paper

LWIR/MWIR adaptive focal plane array
Author(s): William J. Gunning; Jeffrey L. Johnson; Jeffrey F. DeNatale
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Paper Abstract

An Adaptive Focal Plane Array (AFPA) device that enables a "chip scale" imaging spectrometer is being developed. The AFPA device consists of an array of MEMS tunable filters that is intimately coupled to a dual band IR FPA. The MEMS filters provide narrowband tuning in the LWIR and simultaneous broadband imaging in the MWIR. Each filter element can be independently tuned. In the current design, each filter tunes the wavelength of pixel subarrays. Ultimately, filter size will be reduced to achieve independent wavelength tunability for each pixel element. This unique architecture of an AFPA device enables adaptive spectral analysis of the scene. Rather than collecting the complete hyperspectral cube, methods being developed will enable selection of spatially optimized spectral band sets for a variety of targets and materials that are selected "on-the-fly" to maximize the contrast between the local background and the target or material to be identified. The analyzed LWIR spectral information may then be overlaid with a pixel registered high resolution MWIR image.

Paper Details

Date Published: 6 December 2004
PDF: 7 pages
Proc. SPIE 5612, Electro-Optical and Infrared Systems: Technology and Applications, (6 December 2004); doi: 10.1117/12.578610
Show Author Affiliations
William J. Gunning, Rockwell Scientific Co., LLC (United States)
Jeffrey L. Johnson, Rockwell Scientific Co., LLC (United States)
Jeffrey F. DeNatale, Rockwell Scientific Co., LLC (United States)

Published in SPIE Proceedings Vol. 5612:
Electro-Optical and Infrared Systems: Technology and Applications
Ronald G. Driggers; David A. Huckridge, Editor(s)

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