ABSTRACT
Although the fundamentals of light scattering from small particles were well documented before the development of the laser [1], many optical techniques for particle sizing emerged only after the laser became readily available as a light source. Several different features of laser light have been instrumental for size measurements: monochromatic light, coherence, high power, good focusing characteristics, availability of short pulses, etc. Indeed, the field of optical particle sizing is still very dynamic with advances often closely coupled with new technologies.
