Record Display for the EPA National Library Catalog


Main Title Investigation of Scattered Light Holography of Aerosols and Data Reduction Techniques.
Author Matthew, B. J. ; Kem, R. F. ;
CORP Author TRW Systems, Redondo Beach, Calif.
Year Published 1970
Report Number 14103-6002-RO-00; EPA-CPA-70-4; 1065;
Stock Number PB-209 886
Additional Subjects ( Holography ; Aerosols) ; ( Particles ; Light scattering) ; ( Limestone ; Steam boilers) ; ( Air pollution ; Holography) ; Backscattering ; Fly ash ; Calcium carbonates ; Concentration(Composition) ; Ruby lasers ; Mathematical models ; Computer programs ; Photomicrography ; Limestone injection ; Air pollution control
Library Call Number Additional Info Location Last
NTIS  PB-209 886 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 75p
Investigation was initiated to increase the utility of the holographic technique in its application to limestone plume distribution studies. The following results were achieved with respect to the program objectives: The feasibility of holographically recording ruby laser backscatter from aerosols of flyash, chalk dust and incense; A mathematical model was derived which yields particle number density estimates from forward low angle scattered light intensity measurements of reconstructed holographic images recorded under specified conditions; Pulsed ruby laser holograms of a dioctyl phthalate aerosol of known characteristics were recorded and used to verify the derived mathematical model; A method of real image hologram reconstruction was demonstrated to facilitate direct measurement of scattered light intensities and corresponding spatial locations; A computer program of the derived mathematical model was written and utilized for particle number data reduction. The smoke particles corresponding in size to the wavelength of ruby light were recorded. The report describes the apparatus and methods used in each of these major tasks. (Author)