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Title: Method and apparatus for aerosol particle absorption spectroscopy

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.

Inventors:
 [1];  [2]
  1. (Nesconset, NY)
  2. (Manorville, NY)
Publication Date:
Research Org.:
ASSOC UNIVERSITIES INC
OSTI Identifier:
864783
Patent Number(s):
US 4415265
Application Number:
06/277,442
Assignee:
United States of America as represented by United States (Washington, DC) BNL
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; aerosol; particle; absorption; spectroscopy; determining; spectra; properties; particles; heating; beam; source; provides; electromagnetic; energy; scanned; region; spectrum; exposed; bands; band; width; absorb; illuminated; light; wave; length; scattered; determined; analysis; affect; preferably; modulated; simplify; embodiment; intensity; passes; interferometer; reflects; fourier; transform; wave length; absorption band; intensity modulated; source provides; aerosol particle; heating beam; beam passes; aerosol particles; scattered light; fourier transform; electromagnetic energy; beam source; absorption spectra; magnetic energy; absorption bands; band width; particles absorb; absorption spectroscopy; /356/

Citation Formats

Campillo, Anthony J., and Lin, Horn-Bond. Method and apparatus for aerosol particle absorption spectroscopy. United States: N. p., 1983. Web.
Campillo, Anthony J., & Lin, Horn-Bond. Method and apparatus for aerosol particle absorption spectroscopy. United States.
Campillo, Anthony J., and Lin, Horn-Bond. Tue . "Method and apparatus for aerosol particle absorption spectroscopy". United States. https://www.osti.gov/servlets/purl/864783.
@article{osti_864783,
title = {Method and apparatus for aerosol particle absorption spectroscopy},
author = {Campillo, Anthony J. and Lin, Horn-Bond},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 1983},
month = {Tue Nov 15 00:00:00 EST 1983}
}

Patent:

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