Use of a spatial light modulator as an adaptable phase mask for wavefront coding

G. Carles, G. Muyo, S. Bosch, A. R. Harvey

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A wavefront-coded imaging system employing a spatial light modulator (SLM) for the agile implementation of phase masks is presented. The SLM is a liquid crystal display that can be modulated to implement cubic phase masks of variable coding strength. These phase masks produce broad point spread functions insensitive to defocus aberration and are used in combination with post-detection digital image processing to extend the depth-of-field of an imaging system. A detailed description of the calibration process of the SLM in phase mode is presented together with experimental results which include wavefront-coded modulation transfer functions and increased depth-of-field images. The most interesting feature is the versatility provided by the imaging system, as compared to conventional (fixed phase mask) designs, and the agility in which it is done. © 2010 Taylor & Francis.

Original languageEnglish
Pages (from-to)893-900
Number of pages8
JournalJournal of Modern Optics
Volume57
Issue number10
DOIs
Publication statusPublished - 10 Jun 2010

Keywords

  • image processing
  • imaging systems
  • phase mask
  • spatial light modulator
  • wavefront coding

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