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Title: Method and apparatus for aerosol-particle absorption spectroscopy. [DOE patent application]

Abstract

A method and apparatus are described 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.

Inventors:
;
Publication Date:
OSTI Identifier:
5181093
Application Number:
ON: DE82011771
Assignee:
Dept. of Energy
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; AEROSOLS; ABSORPTION SPECTROSCOPY; MONITORING; DESIGN; ELECTROMAGNETIC RADIATION; EQUIPMENT; FOURIER TRANSFORMATION; INTERFEROMETERS; PARTICULATES; COLLOIDS; DISPERSIONS; INTEGRAL TRANSFORMATIONS; MEASURING INSTRUMENTS; PARTICLES; RADIATIONS; SOLS; SPECTROSCOPY; TRANSFORMATIONS; 500200* - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989)

Citation Formats

Campillo, A. J., and Lin, H. B. Method and apparatus for aerosol-particle absorption spectroscopy. [DOE patent application]. United States: N. p., 1981. Web.
Campillo, A. J., & Lin, H. B. Method and apparatus for aerosol-particle absorption spectroscopy. [DOE patent application]. United States.
Campillo, A. J., and Lin, H. B. Thu . "Method and apparatus for aerosol-particle absorption spectroscopy. [DOE patent application]". United States. https://www.osti.gov/servlets/purl/5181093.
@article{osti_5181093,
title = {Method and apparatus for aerosol-particle absorption spectroscopy. [DOE patent application]},
author = {Campillo, A. J. and Lin, H. B.},
abstractNote = {A method and apparatus are described 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.},
doi = {},
url = {https://www.osti.gov/biblio/5181093}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {6}
}