Multiplexing structured illumination in spatial light modulators to achieve super-resolution

Anwar Hussain, José L. Martínez, A. Lizana, Juan Campos

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We present some numerical results corresponding to a recently proposed structured illumination based set-up able to achieve resolution beyond the diffraction limit in 4f optical setup. The technique is based on the use of a liquid crystal display to multiplex the different linear phases which produce all the tilted plane waves at the same time. At the SLM plane constant phases are assigned to each tilted beam. The object is illuminated several times with simultaneous illumination (i.e., simultaneous tilted beams), every time carrying different constant phases. A total of interferograms are recorded at the CCD plane, corresponding to the same number of constant phases sets. The proper selection of phases helps to separate the correlated terms. In a post processing procedure, each hologram is transformed to the spectrum domain and spatially shifted to its proper position. The combination of these shifted segments of the object spectrum gives the synthesized spectrum. To obtain super resolved image inverse Fourier transform is taken of the synthesized spectrum.© Sociedad Española de Óptica.
Original languageEnglish
Pages (from-to)165-171
JournalOptica Pura y Aplicada
Volume46
DOIs
Publication statusPublished - 31 Jul 2013

Keywords

  • Multiplexed illumination
  • Spatial light modulators
  • Super-resolution

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