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:
-
- Nesconset, NY
- Manorville, NY
- Issue Date:
- Research Org.:
- Associated Universities, Inc., Upton, NY (United States)
- OSTI Identifier:
- 864783
- Patent Number(s):
- 4415265
- Application Number:
- 06/277,442
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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}
}