Study of thermal radiation Moiré patterns using coherent illumination-direction-multiplexing Fourier Ptychographic imaging

Hawra Alghasham, Hira Farooq, Ceren Uzun, A. A. Bernussi, Luis Grave de Peralta

Research output: Contribution to journalArticlepeer-review

Abstract

A 4-f imaging system was used for collecting images of complex thermal radiation Moiré patterns that were processed using the coherent illumination-direction-multiplexing Fourier Ptychographic imaging algorithm. We show that the observed Moiré patterns can be explained by assuming the sample was simultaneously illuminated from different directions by several thermal radiation beams coherent with each other. Our results revealed that the numerical algorithm was stable when the phase of the optical disturbance at the sample’s plane was known, but it failed to determine the correct phase when it is unknown.

Original languageEnglish
Pages (from-to)1340-1347
Number of pages8
JournalJournal of Modern Optics
Volume67
Issue number16
DOIs
StatePublished - 2020

Keywords

  • (100.3010) image reconstruction techniques
  • (110.2990) image formation theory
  • 110.6820 thermal imaging
  • A 4-f imaging
  • IDM-FPM
  • Moiré patterns
  • Thermal radiation

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