Accession Number : AD0738873

Title :   Investigation of Particle-Size Determination from the Optical Response of a Laser-Doppler Velocimeter.

Descriptive Note : Technical rept.,

Corporate Author : PURDUE UNIV LAFAYETTE IND PROJECT SQUID HEADQUARTERS

Personal Author(s) : Andrews,D. G. ; Seifert,H. S.

Report Date : FEB 1972

Pagination or Media Count : 69

Abstract : The intensity of laser light back-scattered from a particle and transmitted by a Fabry-Perot interferometer is used to determine particle-size. The instrument's optics and electronics are calibrated by examining stationary particles of known diameter resting on a non-reflective glass slide. The response of the instrument is determined by comparing measured intensities with theoretical values calculated as a complex function of particle size, refractive index and ray geometry. The results show that the measured intensities do approximate the theoretical variation with particle size and in the range of particle diameters measured (1-10 microns), the error is less than one micron. (Author)

Descriptors :   (*FLOWMETERS, LASERS), (*TWO PHASE FLOW, MEASUREMENT), (*PARTICLE SIZE, MEASUREMENT), COMBUSTION PRODUCTS, GAS FLOW, AEROSOLS, COMPUTER PROGRAMS, BACKSCATTERING, OPTICAL EQUIPMENT, REFRACTIVE INDEX

Subject Categories : Test Facilities, Equipment and Methods
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE