Компьютерная оптика (Apr 2018)

Noise minimised high resolution digital holographic microscopy applied to surface topography

  • Elena Achimova,
  • Vladimir Abaskin,
  • Daniel Claus,
  • Giancarlo Pedrini,
  • Igor Shevkunov,
  • Vladimir Katkovnik

DOI
https://doi.org/10.18287/2412-6179-2018-42-2-267-272
Journal volume & issue
Vol. 42, no. 2
pp. 267 – 272

Abstract

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The topography of surface relief gratings was studied by digital holographic microscopy. The applicability of the method for quantitative measurements of surface microstructure at nanoscale was demonstrated. The method for wavefront reconstruction of surface relief from a digital hologram recorded in off-axis configuration was also applied. The main feature is noise filtration due to the presence of noise in the recorded intensity distribution and the use of all orders of the hologram. Reconstruction results proved a better effectiveness of our approach for topography studying of relief grating patterned on a ChG As2S3 – Se nanomultilayers in comparison with standard Fourier Transform and Atom Force Microscope methods.

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