Multispectral-imaging MWIR sensor for determination of spectral target signatures

Peter Ljungberg; Ralf G. Kihlen; Stefan Helge Lundqvist; Pierre Potet; Stephane Berrebi

doi:10.1117/12.280402

13 August 1997 Multispectral imaging MWIR sensor for determination of spectral target signatures

Peter Ljungberg, Ralf G. Kihlen, Stefan Helge Lundqvist, Pierre Potet, Stephane Berrebi

Proceedings Volume 3061, Infrared Technology and Applications XXIII; (1997) https://doi.org/10.1117/12.280402
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

There is a trend today towards a reduction in target signatures, the signatures becoming increasingly adapted to the background in which the targets operate. In addition, new types of countermeasures are making the task for optical seekers increasingly difficult. One way to increase the capability of detecting low-signature targets in a countermeasure environment is to utilize not only the magnitude of the signature but also its distribution over the spectrum. For collection of information regarding the spectral signatures of targets, countermeasures and backgrounds, a multispectral imaging MWIR sensor has been developed by us. This device utilizes the high frame rate made possible by modern FPA arrays. Such an array has been combined with a rapidly rotating filter wheel, thereby producing images of 128 by 128 pixels in six wavelength bands in the 2 - 5 micrometer region at a frame rate exceeding 30 Hz in each band. The sensor has a field-of-view of 3.7 degrees and a pixel resolution of 0.5 mrad. The sensor has the capability to perform two point correction in real time, thereby compensating for the different dynamic ranges in each spectral band. An extensive measurement program is in progress for gathering data for targets, countermeasures and backgrounds. Selected results from this program are presented.

Citation Download Citation

Peter Ljungberg, Ralf G. Kihlen, Stefan Helge Lundqvist, Pierre Potet, and Stephane Berrebi "Multispectral imaging MWIR sensor for determination of spectral target signatures", Proc. SPIE 3061, Infrared Technology and Applications XXIII, (13 August 1997); https://doi.org/10.1117/12.280402

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