Holographic imaging through a scattering layer using speckle interferometry

Abstract

Optical imaging through complex scattering media is one of the major technical challenges with important applications in many research fields, ranging from biomedical imaging to astronomical telescopy to spatially multiplexed optical communications. Various approaches for imaging through a turbid layer have been recently proposed that exploit the advantage of object information encoded in correlations of the random optical fields. Here we propose and experimentally demonstrate an alternative approach for single-shot imaging of objects hidden behind an opaque scattering layer. The proposed technique relies on retrieving the interference fringes projected behind the scattering medium, which leads to complex field reconstruction, from far-field laser speckle interferometry with two-point intensity correlation measurement. We demonstrate that under suitable conditions, it is possible to perform imaging to reconstruct the complex amplitude of objects situated at different depths.

Extended depth-resolved imaging through a thin scattering medium with PSF manipulation

“…To achieve this objective, a great deal of effort has been made and new techniques have been introduced in recent years. The following are the most representative ones, to just name a few: ultrafast time-of-flight scattering imaging method 10 , digital holography technique 11 , phase-space analysis methods 12 , 13 , holographic image sensor with speckle-correlation scattering matrix 14 , DiffuserCam with a well-designed compress sensing algorithm 15 , depth-resolved with speckle holography and two-point intensity correlation 16 , wavefront shaping with axial “Memory Effect” (ME) 17 – 20 , speckle correlation method with an assisted reference point source 21 , and so on. Among these improved techniques, the speckle correlation method appears very promising, as it does not need any coherent sources, raster-scanning mechanism, nor any time-consuming wavefront shaping devices.…”

Analysis of speckle patterns in electronic devices for the monitoring of current changes

“…According to Goldfisher, it is feasible to perform a second-order statistical analysis of the speckle patterns based on their autocorrelation function, their Fourier transform and the spectral power density (Henao, 1997), (Somkuwar, 2017), (Sharma, 2006 ). Both the probability density and the autocorrelation function are cataloged as the principle of the correlation techniques of the speckle patterns, for the case of the processing of the images resulting from the speckle pattern, two states of deformation of the study surface are considered.…”

Perspective: Wavefront shaping techniques for controlling multiple light scattering in biological tissues: Toward in vivo applications

“…55 Alternatively, far-field laser speckle interferometry with two-point intensity correlation measurement was also used to image object though a turbid medium. 56,57 Working toward in vivo applications, however, one should consider the short decorrelation time of live tissues. The decorrelation time of live tissues is inversely proportional to the thickness of the tissue L and is expected to decay even faster for L > l * s due to the loss of directionality.…”