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Proceedings Paper

Field trials for determining the visible and infrared transmittance of screening smoke
Author(s): Carmen Sánchez Oliveros; Guillermo Santa-María Sánchez; Carlos Rosique Pérez
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Paper Abstract

In order to evaluate the concealment capability of smoke, the Countermeasures Laboratory of the Institute of Technology "Marañosa" (ITM) has done a set of tests for measuring the transmittances of multispectral smoke tins in several bands of the electromagnetic spectrum. The smoke composition based on red phosphorous has been developed and patented by this laboratory as a part of a projectile development. The smoke transmittance was measured by means of thermography as well as spectroradiometry. Black bodies and halogen lamps were used as infrared and visible source of radiation. The measurements were carried out in June of 2008 at the Marañosa field (Spain) with two MWIR cameras, two LWIR cameras, one CCD visible camera, one CVF IR spectroradiometer covering the interval 1.5 to 14 microns and one array silicon based spectroradiometer for the 0.2 to 1.1 μm spectra. The transmittance and dimensions of the smoke screen were characterized in the visible band, MWIR (3 - 5 μm and LWIR (8 - 12 μm) regions. The size of the screen was about 30 meters wide and 5 meters high. The transmittances in the IR bands were about 0.3 and better than 0.1 in the visible one. The screens showed to be effective over the time of persistence for all of the tests. The results obtained from the imaging and non-imaging systems were in good accordance. The meteorological conditions during tests such as the wind speed are determinant for the use of this kind of optical countermeasures.

Paper Details

Date Published: 25 September 2009
PDF: 8 pages
Proc. SPIE 7483, Technologies for Optical Countermeasures VI, 74830P (25 September 2009); doi: 10.1117/12.830522
Show Author Affiliations
Carmen Sánchez Oliveros, Institute of Technology Marañosa (Spain)
Guillermo Santa-María Sánchez, Institute of Technology Marañosa (Spain)
Carlos Rosique Pérez, Institute of Technology Marañosa (Spain)


Published in SPIE Proceedings Vol. 7483:
Technologies for Optical Countermeasures VI
David H. Titterton; Mark A. Richardson, Editor(s)

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