We discuss a technique whereby an optical–digital computer is trained to do particle-size analysis by sampling the light diffracted from a collection of particles in a coherent optical system. The computer learns the signatures of different particle classes by analyzing the light diffracted from mixed slides, i.e., slides containing more than one class of particles. Two alternative algorithms for particle-size estimation are given. Some important design considerations are discussed.
© 1977 Optical Society of America
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