System for detecting fluorescing components in aerosols

Details System for detecting fluorescing components in aerosols System for detecting fluorescing components in aerosols

1998-03-17

1999-12-07

Evans, F. L.

Optics: measuring and testing

For optical fiber or waveguide inspection

2504612, 356318, 356336, G01N 2164, G01N 1502

Patent

active

059992506

ABSTRACT:
An electro-optical aerosol characterizing system includes a continuous wave laser for generating two beams in the red wavelength range, intersecting a particle stream at slightly spaced apart locations. A pulsed UV laser generates a beam that intersects the particle stream at a third location downstream. Laser energy scattered by each particle as it passes the first two locations, is used to compute aerodynamic sizes and UV laser pulsing times, so that in each case the UV beam irradiates the particle at the downstream location. Particles containing biological materials or other fluorescing components emit fluorescence signals in response to the irradiation. Accordingly, the system provides information about particle composition as well as particle size.

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