title: Characterizing and monitoring respiratory aerosols by light scattering.
abstract: The elastic-scattering intensity pattern from a single particle as a function of spherical coordinate angles theta and phi 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 (theta from 90 degrees to 168 degrees and phi from 0 degrees to 360 degrees) was detected from a single aerosol (e.g., a Bacillus subtilisspore, a 1-microm-diameter polystyrene latex sphere, or a cluster of either of these) flowing through the reflectors focal volume at 5 m/s. Noticeable difference 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.
authors.affiliation: Department of Applied Physics and Center for Laser Diagnostics, Yale University, New Haven, Connecticut 06520, USA.
authors.forename: Yong-Le
authors.initials: YL
authors.lastname: Pan
authors.forename: Kevin B
authors.initials: KB
authors.lastname: Aptowicz
authors.forename: Richard K
authors.initials: RK
authors.lastname: Chang
authors.forename: Matt
authors.initials: M
authors.lastname: Hart
authors.forename: Jay D
authors.initials: JD
authors.lastname: Eversole