Optimum frequency selection in multifrequency interferometry

Catherine E. Towers, David P. Towers, J. D C Jones

Research output: Contribution to journalArticlepeer-review

175 Citations (Scopus)


We describe a novel technique for measurement of absolute order of interference in multifrequency interferometry. An optimization criterion is introduced that leads to frequency selection formulations that are optimized with respect to the minimum number of frequencies required for achieving the maximum target dynamic range. The method is generalized to N frequencies and gives a definition of measurement reliability. We demonstrate the technique by means of coherent fringe projection for nonintrusive, full-field profilometry. Experimental data for three frequencies are presented. © 2003 Optical Society of America.

Original languageEnglish
Pages (from-to)887-889
Number of pages3
JournalOptics Letters
Issue number11
Publication statusPublished - 1 Jun 2003


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