Sensing wave-front amplitude and phase with phase diversity

Stuart M. Jefferies, Michael Lloyd-Hart, E. Keith Hege, James Georges

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


We show in benchtop experiments that wave-front phase estimation by phase diversity can be significantly improved by simultaneous amplitude estimation. Processing speed, which will be important for real-time wave-front control applications, can be enhanced by use of small-format detectors with pixels that do not fully sample the diffraction limit. Using an object-independent phase-diversity algorithm, we show that, for both pointlike and extended objects, the fidelity of the phase and amplitude estimates degrades gracefully, rather than catastrophically, as the sampling becomes coarser. We show in simulation that the same algorithm also improves the fidelity of image reconstruction of complex targets.

Original languageEnglish (US)
Pages (from-to)2095-2102
Number of pages8
JournalApplied optics
Issue number11
StatePublished - Jan 1 2002
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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