Simultaneous forward- and backward-hemisphere elastic-light-scattering patterns of respirable-size aerosols.
Two-dimensional angular optical scattering (TAOS) patterns of aerosols are measured simultaneously from the forward hemisphere 15 degrees < theta < 90 degrees as well as the backward hemisphere 90 degrees < theta < 165 degrees (detecting 63% of the 4pi sr of scattered light) by using an ellipsoidal reflector and an intensified CCD detector. TAOS patterns were obtained from polystyrene-latex spheres (individuals and aggregates) and from single Bacillus subtilis spores. These information-rich patterns, measured with a single laser pulse for individual particles on the fly, suggest that forward-TAOS and backward-TAOS measurements may be used for rapid classification of single aerosol particles.
Fernandes
Gustavo E
GE
Department of Applied Physics and Center for Laser Diagnostics, Yale University, New Haven, Connecticut 06520-8284, USA. gustavo.fernandes@yale.edu
Pan
Yong-Le
YL
Chang
Richard K
RK
Aptowicz
Kevin
K
Pinnick
Ronald G
RG