Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1981-06-25
1983-11-15
Corbin, John K.
Optics: measuring and testing
By particle light scattering
With photocell detection
356318, 356342, G01N 2139
Patent
active
044152655
ABSTRACT:
A method and apparatus for determining the absorption spectra, and other properties, of aerosol particles. A heating beam source provides a beam of electromagnetic energy which is scanned through the region of the spectrum which is of interest. Particles exposed to the heating beam which have absorption bands within the band width of the heating beam absorb energy from the beam. The particles are also illuminated by light of a wave length such that the light is scattered by the particles. The absorption spectra of the particles can thus be determined from an analysis of the scattered light since the absorption of energy by the particles will affect the way the light is scattered. Preferably the heating beam is modulated to simplify the analysis of the scattered light. In one embodiment the heating beam is intensity modulated so that the scattered light will also be intensity modulated when the particles absorb energy. In another embodiment the heating beam passes through an interferometer and the scattered light reflects the Fourier Transform of the absorption spectra.
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Campillo Anthony J.
Lin Horn-Bond
Besha Richard G.
Corbin John K.
Gottlieb Paul A.
Koren Matthew W.
The United States of America as represented by the United States
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