Single-shot and phase-shifting digital holographic microscopy using a 2-D grating

Taeseok Daniel Yang, Hyung Jin Kim, Kyoung Jin Lee, Beop-Min Kim, Youngwoon Choi

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

We demonstrate digital holographic microscopy that, while being based on phase-shifting interferometry, is capable of single-shot measurements. A two-dimensional (2-D) diffraction grating placed in a Fourier plane of a standard in-line holographic phase microscope generates multiple copies of a sample image on a camera sensor. The identical image copies are spatially separated with different overall phase shifts according to the diffraction orders. The overall phase shifts are adjusted by controlling the lateral position of the grating. These phase shifts are then set to be multiples of π/2. Interferograms composed of four image copies combined with a parallel reference beam are acquired in a single shot. The interferograms are processed through a phase-shifting algorithm to produce a single complex image. By taking advantage of the higher sampling capacity of the in-line holography, we can increase the imaging information density by a factor of 3 without compromising the imaging acquisition speed.

Original languageEnglish
Pages (from-to)9480-9488
Number of pages9
JournalOptics Express
Volume24
Issue number9
DOIs
Publication statusPublished - 2016 May 2

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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