EVALUATION OF A PARTICLE SIZING TECHNIQUE BASED ON LASER SHEETS

The use of a laser sheet (or elliptical Gaussian beam) in measurement techniques is of growing interest. Some of these techniques take advan tage of the wavefront curvature of such beams as in a dual-crylindrica l wave system (DCW). Nevertheless, up to now, the analysis of the prop erties of the light scattered by spherical particles from the beam has been carried out largely by using geometrical optics or classical Lor enz-Mie theory. in this paper, the generalized Lorenz-Mie theory (GLMT ) is applied to the analysis of an existing DCW measurement system. Di fferences between the results predicted by classical approaches and by GLMT are emphasized.