New phase measurement for non-monotonical fringe patterns

S. H. Tang, Y. Y. Hung, Q. Zhu

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


A novel two-dimensional Fast Fourier Transformation (FFT) based phase measurement technique for fringe pattern analysis is presented in this paper. The technique uses two fringe patterns whose phase are slightly shifted to eliminate any phase ambiguity which exists in a fringe pattern whose phase is not monotonically increasing. It is capable of extracting an accurate phase distribution from a noisy fringe pattern without assigning fringe orders and interpreting data in the regions between fringes. The technique is free from errors caused by the high frequency components, the variation of background intensity, and the modulation of amplitude on fringe patterns. This technique is particularly useful for processing the high-frequency noise corrupted sinusoidal fringe patterns.

Original languageEnglish (US)
Pages (from-to)731-737
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue numberpt 2
StatePublished - 1990
Externally publishedYes
EventOptical Testing and Metrology III: Recent Advances in Industrial Optical Inspection - San Diego, CA, USA
Duration: Jul 8 1990Jul 13 1990

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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