A dual CO2 laser system was used to measure aerosol backscatter spectral signatures from dust minerals (kaolin, illite, montmorillonite, colemanite, and limestone) as well as from a soil sample from Dugway Proving Ground, UT. Complex refractive indices measured from bulk samples of the materials and particle size distributions measured with a cascade impactor were used to compute theoretical backscatter spectra using Mie theory. The measured signatures agreed well with calculated signatures for most minerals and the soil sample. The experiment demonstrated the feasibility of detecting the compositional elements of dust using a CO2 laser-based system.
© 1986 Optical Society of America
Diane Powell Walter, David E. Cooper, Jan E. van derLaan, and Edward R. Murray, "Carbon dioxide laser backscatter signatures from laboratory-generated dust," Appl. Opt. 25, 2506-2513 (1986)