Phase retrieval from multiple binary masks generated speckle patterns

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We present a reference-less and time-multiplexing phase retrieval method by making use of the digital micromirror device (DMD). In this method, the DMD functions not only as a flexible binary mask which modulates the optical field, but also as a sampling mask for measuring corresponding phases, which makes the whole setup simple and robust. The DMD reflection forms a sparse intensity mask in the pupil which produces speckle pattern after propagation. With the recorded intensity on the camera and the binary pattern on the DMD, the phase in all the ‘on’ pixels can be reconstructed at once by solving inverse problems with iterative methods, for instance using Gerchberg-Saxton algorithm. Then the phase of the whole pupil can be reconstructed from a series of binary patterns and speckle patterns. Numerical experiments show the feasibility of this phase retrieval method and the importance of sparse binary masks in the improving of convergence speed.
Original languageEnglish
Title of host publicationProceedings of SPIE
Subtitle of host publicationOptical Sensing and Detection IV
EditorsFrancis Berghmans, Anna G. Mignani
Place of PublicationBellingham, WA, USA
Number of pages6
ISBN (Print)978-1-510601444
Publication statusPublished - 2016
EventOptical Sensing and Detection - SQUARE Brussels Meeting Centre, Brussels, Belgium
Duration: 3 Apr 20167 Apr 2016

Publication series

NameProceedings of SPIE
ISSN (Electronic)1605-7422


ConferenceOptical Sensing and Detection


  • phase retrieval
  • adaptive optics
  • digital micromirror device
  • inverse problems


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