Accelerated autofocusing of off-axis holograms using critical sampling

Abstract

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 12x 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.

Publication
Optics Letters, 37 (24)
M. Fatih Toy
M. Fatih Toy
Associate Professor of Electrical and Electronics Engineering

My research interests include digital holography, quantitative phase imaging, optical diffraction tomography and optical superresolution.