Noise-resolution trade-off in projection algorithms for laser diffraction particle sizing

Francisco Pedocchi, Marcelo H. Garcia

Research output: Contribution to journalArticlepeer-review


The size distribution of a particle suspension can be inferred from studying the diffracted light pattern produced by a laser beam that passes through the suspension. This involves solving an ill-posed linear system. Two previous versions of projection algorithms were tested by use of computer simulations and experiments. Both algorithms showed limitations in restoring the size distribution, because of either the shape of the size distribution or the presence of noise in the scattered light signal. The generalized projection algorithm presented in this work solves these difficulties by introducing a parameter that allows the user to adjust the noise-resolution trade-off, making it suitable for the analysis of natural suspensions.

Original languageEnglish (US)
Pages (from-to)3620-3628
Number of pages9
JournalApplied Optics
Issue number15
StatePublished - May 20 2006

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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