The Use of Absorbing Smokes for the Attenuation of Infra-Red Radiation
CHEMICAL DEFENCE ESTABLISHMENT PORTON DOWN (UNITED KINGDOM)
Pagination or Media Count:
A number of particulate clouds composed of carbon particles have been investigated in the laboratory to compare their efficiencies as absorbers of infra-red radiation. It was found that the most efficient were those produced from pulverized charcoals, one cloud giving almost uniform attenuation over the wavelength range 1 - 13 micrometers. A dispersion of this material was compared in the field with smokes produced from white phosphorus and from hexachloroethane smoke mixture PN 800. Under the conditions of the trials it was found that for the same aerosol concentrations, the charcoal was about five times more efficient than the chemical smokes against radiation having a wavelength of about 5 micrometers.
- Infrared Detection and Detectors