Accelerated autofocusing of off-axis holograms using critical sampling

M. Fatih Toy*, Jonas Kühn, Stéphane Richard, Jérôme Parent, Marcel Egli, Christian Depeursinge

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


In this Letter we propose a fast off-axis hologram autofocusing (AF) approach that is based on the redundant data elimination by the critical resampling of the contained complex field. Implementation of the proposed methodology enables the real-time AF with up to 12× speed-up factors in comparison to the classical approach. The method is further extended for single-shot physical autofocus of the fluorescence imaging channel of multimodal imaging instruments capable of off-axis hologram acquisition.

Original languageEnglish (US)
Pages (from-to)5094-5096
Number of pages3
Issue number24
StatePublished - Dec 15 2012
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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