About this Research Topic
Imaging objects which are behind random media, covered by a multimode fiber, or around corners continues to prove a challenging process across a wide range of fields including, deep tissue imaging in biology, telescopic imaging through atmospheric turbulence, telecommunication, and numerous industrial applications. Inherent defects are introduced as light propagates through inhomogeneous media or across rough surfaces. Over the past few decades, a variety of methods including optical gating, wave front shaping, speckle correlation, artificial intelligence, and so on, have been proposed in an attempt to mitigate the problems introduced by various kinds of random media.
The unique functionality exhibited by optoelectronic devices, alongside their recent advances, has meant digital holography (DH) has undergone significant development and has, in turn, made a crucial contribution to scattering imaging methods. Notably, DH exhibits an intrinsic gating function which is able select un-scattered photons for image reconstruction, namely; time gating, coherence gating, and spatial frequency gating, etc.. As DH can gather the complex wave front directly, focusing and imaging through scattering media could be realized by addressing the digital optical phase conjugation (DOPC) or digitalized correction at high speed. The complex transmission matrix exhibited by the scatter media could be measured by recording holograms from each incident light mode sequentially. Synthetic wavelength holography, which undergoes limited scattering owing to its long wavelength, could be established to obtain images of hidden objects. Holographic correloscopy could be used to recover 3D objects with the aid of a point source. Besides coherence holography, both photon correlation holography and intensity interferometry utilize the fourth-order field correlation in order to record holograms for object reconstruction. The speckle property, polarization, and the spatial temporal profile could also be controlled using holograms.
Despite the recent advances, there remains a long way to go in order to realise the practical applications of this technology. Novel techniques relating to holography and imaging applications are constantly being developed. As such, this Research Topic aims to collect the representative works in the state-of-the-art.
Topics of interest include, but are not limited to:
- Holography based wavefront shaping
- Holography based gating methods
- Transmission matrix measurement for focusing and imaging
- Artificial intelligence for holography and scattering imaging
- Quantitative phase imaging through scattering media
- Computer generated holograms
- Holographic correloscopy
- Digital Incoherent holography for scattering media
- Hologram for speckle property control
- Biomedical and industrial applications
The unique functionality exhibited by optoelectronic devices, alongside their recent advances, has meant digital holography (DH) has undergone significant development and has, in turn, made a crucial contribution to scattering imaging methods. Notably, DH exhibits an intrinsic gating function which is able select un-scattered photons for image reconstruction, namely; time gating, coherence gating, and spatial frequency gating, etc.. As DH can gather the complex wave front directly, focusing and imaging through scattering media could be realized by addressing the digital optical phase conjugation (DOPC) or digitalized correction at high speed. The complex transmission matrix exhibited by the scatter media could be measured by recording holograms from each incident light mode sequentially. Synthetic wavelength holography, which undergoes limited scattering owing to its long wavelength, could be established to obtain images of hidden objects. Holographic correloscopy could be used to recover 3D objects with the aid of a point source. Besides coherence holography, both photon correlation holography and intensity interferometry utilize the fourth-order field correlation in order to record holograms for object reconstruction. The speckle property, polarization, and the spatial temporal profile could also be controlled using holograms.
Despite the recent advances, there remains a long way to go in order to realise the practical applications of this technology. Novel techniques relating to holography and imaging applications are constantly being developed. As such, this Research Topic aims to collect the representative works in the state-of-the-art.
Topics of interest include, but are not limited to:
- Holography based wavefront shaping
- Holography based gating methods
- Transmission matrix measurement for focusing and imaging
- Artificial intelligence for holography and scattering imaging
- Quantitative phase imaging through scattering media
- Computer generated holograms
- Holographic correloscopy
- Digital Incoherent holography for scattering media
- Hologram for speckle property control
- Biomedical and industrial applications
Keywords: Holography, Scattering Imaging, Wave front shaping, Transmission Matrix, Unconventional Holography
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