LWIR/MWIR adaptive focal plane array

William J. Gunning; Jeffrey L. Johnson; Jeffrey F. DeNatale

doi:10.1117/12.578610

6 December 2004 LWIR/MWIR adaptive focal plane array

William J. Gunning, Jeffrey L. Johnson, Jeffrey F. DeNatale

Proceedings Volume 5612, Electro-Optical and Infrared Systems: Technology and Applications; (2004) https://doi.org/10.1117/12.578610
Event: European Symposium on Optics and Photonics for Defence and Security, 2004, London, United Kingdom

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.

Citation Download Citation

William J. Gunning, Jeffrey L. Johnson, and Jeffrey F. DeNatale "LWIR/MWIR adaptive focal plane array", Proc. SPIE 5612, Electro-Optical and Infrared Systems: Technology and Applications, (6 December 2004); https://doi.org/10.1117/12.578610

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