The elastic-scattering intensity pattern from a single particle as a function of spherical coordinate angles θ and ø provides detailed information on the pattern’s morphology. By use of an ellipsoidal reflector and a CCD camera, a single-laser-shot intensity pattern from a large angular range (θ from 90° to 168° and ø from 0° to 360°) was detected from a single aerosol (e.g., a <i>Bacillus subtilis</i> spore, a 1-µm-diameter polystyrene latex sphere, or a cluster of either of these) flowing through the reflector’s focal volume at 5 m/s. Noticeable differences in the large-angle-range two-dimensional angular optical scattering (LATAOS) suggest that the LATAOS pattern could be useful in differentiating and classifying life-threatening aerosols from normal background aerosols.
© 2003 Optical Society of America
(000.1430) General : Biology and medicine
(010.1100) Atmospheric and oceanic optics : Aerosol detection
(290.5820) Scattering : Scattering measurements
(290.5850) Scattering : Scattering, particles
Yong-Le Pan, Kevin B. Aptowicz, Richard K. Chang, Matt Hart, and Jay D. Eversole, "Characterizing and monitoring respiratory aerosols by light scattering," Opt. Lett. 28, 589-591 (2003)