Advances in Digital Holographic Microscopy and Applications

Digital holographic microscopy (DHM) is a powerful imaging modality which combines two well-established techniques, i.e., digital holography and optical microscopy. It provides for example label-free, quantitative phase imaging, shape measurement with nanometer precision, and extended depth of field due to numerical refocusing. In the off-axis or phase-shifting DHM, both the amplitude and phase information of a sample can be obtained simultaneously by recording the interference pattern of a magnified object wave and a reference wave. Alternatively, the inline (lens-less) DHM provides the phase information through an iterative algorithm without using any independent reference wave. DHM provides information on not only transparent samples but also quantitative thickness or refractive indexed samples or the shape of technical surfaces. Due to these features, DHM has been widely applied for various applications ranging in industrial inspection, visualization of liquid/gas flow, and biomedical imaging, to name a few.

This Research Topic will highlight the current research works carried out in digital holography-based microscopic 3D imaging techniques that include, among others, novel microscopic systems, super resolution techniques, and compressive microscopy. Also, microscopic imaging based on various light sources such as coherent to incoherent, single photon-counting microscopes, and X-ray to terahertz waves will be accepted. The accepted articles will therefore be expected to present the state-of-the-art technological developments that are currently being developed and will explore further novel applications of digital holography microscopic imaging for various applications.

We invite original articles, as well as sophisticated review articles, from the following topics:
- Digital holography
- Wave field sensing
- Incoherent holography
- Computational imaging
- Interferometric microscopy
- Optical coherence tomography
- Quantitative phase imaging
- Structured illumination
- Ptychographic microscopy
- Diffraction phase microscopy

Keywords: Digital Holographic Microscopy, Optical Metrology, Computational Imaging, Imaging Science, Deep Learning for Optical Imaging

Important note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.