Effect of diffraction on the moiré image. I. theory

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32 Scopus citations


The effect of diffraction on the transmission pattern of an infinite Ronchi grid and the moiré image of two equal Ronchi grids was studied. Transmission patterns and moiré images of two equal Ronchi grids with and without a phase object, at a wide range of conditions, are presented. Diffractional phenomena were found to affect the transmission pattern and the moiré image significantly. In order to minimize their effect, the distance between the grids must be exactly one of the Fourier-image planes of the grid. The moiré image of a given phase object, even under these conditions, has an inherent error that can be precisely calculated. Deflection mapping and the uncertainty (because of diffraction) of lenses were calculated.

Original languageEnglish
Pages (from-to)371-379
Number of pages9
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Issue number3
StatePublished - 1 Mar 1985
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Computer Vision and Pattern Recognition


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