Simultaneous Recognition of the Shape, Size Number Density and Position of Particles Using the Multiplexed Matched Spatial Filter

Abstract

In order to simultaneously and instantaneously identify the shape, size, number density and position of particles in a given field, the new Matched Spatial Filter which uses a single exposure hologram was developed. This filter system was theoretically and experimentally investigated to discover it's capabilities in : (1) recognizing the shape of particle's position by the desired shape of particles, (2)searching the posibility and conditions for recognition of the shape of particles independent of the inclination of the particle, (3) clarifying the permitted limit of particles recognized as having the same shape and the same size as the master objects, (4) finding away to distinguish the intensities of the output light signals using auto-correlation and cross-correlation. The experimental results recognized for each particle shape, as found by this filter, are shown in this paper.