Lensless coherent imaging by sampling of the optical field with digital micromirror device

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Abstract

We have experimentally demonstrated a lensless coherent microscope based on direct registration of the complex optical field by sampling the pupil with a sequence of two-point interferometers formed by a digital micromirror device. Complete registration of the complex amplitude in the pupil of the imaging system, without any reference beam, provides a convenient link between the experimental and computational optics. Unlike other approaches to digital holography, our method does not require any external reference beam, resulting in a simple and robust registration setup. Computer analysis of the experimentally registered field allows for focusing the image in the whole range from zero to infinity, and for virtual correction of the aberrations present in the real optical system, by applying the adaptive wavefront corrections to its virtual model.
Original languageEnglish
Article number122001
Pages (from-to)1-5
JournalJournal of Optics
Volume17
Issue number12
DOIs
Publication statusPublished - 2015

Keywords

  • Microscopy
  • Digital holography
  • Inverse problems
  • Phase retrieval
  • Adaptive optics

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