Infrared Properties of Biological Materials of Interest to the Army.
Interim technical rept. 1 Jan-30 Jun 84,
SRI INTERNATIONAL MENLO PARK CA
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IR backscatter was measured from aerosols of potassium bromide, B. subtilis, B. subtilis spores, and M. luteus over the 9- to 11-micron region using a tunable carbon dioxide laser. The observed backscatter signatures were found to be in agreement with the predictions of Mie theory using the measured complex refractive indices appropriate to the material. Based on this work, we conclude that IR DISC is capable of detecting aerosols of biological organisms of concentrations of 100 particlescu cm. The U.S. Armys detection goals are in the range of 5- to 10-particlesliter. Additional sensitivity can be achieved by extending the DISC technique to polarization sensitive methods.
- Chemical, Biological and Radiological Warfare