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Improved technique for data inversion: optical sizing of multicomponent aerosols
- Source :
- Applied Optics. Dec 20, 1995, Vol. 34 Issue 36, p8422, 15 p.
- Publication Year :
- 1995
-
Abstract
- Estimation of particle-size distribution is analyzed for the complicated case of compound aerosols, in which particles are distinguished by sizes and optical constants. This task arises in a number of interesting practical situations when aerosol scatterers cannot be described with a common refractive index. This is an inverse problem with a large number of variables, and questions of formal inversion are of great importance here. They are discussed in detail, and an improved numerical-inversion method is proposed. The method provides a nonnegative and highly stable solution and makes it possible to include varied additional or a priori information. It is shown that the proposed technique is closely related to well-known linear and relaxation methods widely used in atmospheric optics. The algorithm for determination of bicomponent aerosol-size distribution is devised. It uses the intensity of light scattered at different angles and spectral-extinction measurements. In addition, the algorithm can incorporate a priori restrictions of size-spectra smoothness. A set of numerical examples illustrates the algorithm.
- Subjects :
- Aerosols -- Research
Optical measurements -- Research
Astronomy
Physics
Subjects
Details
- ISSN :
- 1559128X
- Volume :
- 34
- Issue :
- 36
- Database :
- Gale General OneFile
- Journal :
- Applied Optics
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.18035206