Correlation Plenoptic Imaging With Entangled Photons

Pepe, F.; Lena, Francesco Di; Garuccio, Augusto; Scarcelli, Giuliano; D’Angelo, Milena

doi:10.3390/technologies4020017

Cited by 45 publications

(27 citation statements)

References 28 publications

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“…Correlation plenoptic imaging (CPI) has recently been proposed for overcoming this fundamental limit [20]. The main idea is to exploit the second-order spatio-temporal correlation properties of light to perform spatial and directional detection on two distinct sensors: Using correlated beams [20][21][22], high-resolution "ghost" imaging is performed on one sensor [23][24][25][26][27] while simultaneously obtaining the angular information on the second sensor. As a result, the relation between the spatial (N x ) and the angular (N u ) pixels per line, at fixed N tot , becomes linear: N x + N u = N tot [20].In this paper, we present the first experimental realization of CPI.…”

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confidence: 99%

Diffraction-Limited Plenoptic Imaging with Correlated Light

et al. 2017

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Traditional optical imaging faces an unavoidable trade-off between resolution and depth of field (DOF). To increase resolution, high numerical apertures (NA) are needed, but the associated large angular uncertainty results in a limited range of depths that can be put in sharp focus. Plenoptic imaging was introduced a few years ago to remedy this trade off. To this aim, plenoptic imaging reconstructs the path of light rays from the lens to the sensor. However, the improvement offered by standard plenoptic imaging is practical and not fundamental: the increased DOF leads to a proportional reduction of the resolution well above the diffraction limit imposed by the lens NA. In this paper, we demonstrate that correlation measurements enable pushing plenoptic imaging to its fundamental limits of both resolution and DOF. Namely, we demonstrate to maintain the imaging resolution at the diffraction limit while increasing the depth of field by a factor of 7. Our results represent the theoretical and experimental basis for the effective development of the promising applications of plenoptic imaging.Plenoptic imaging (PI) is a novel optical method for recording visual information [1]. Its peculiarity is the ability to record both position and propagation direction of light in a single exposure. PI is currently employed in the most diverse applications, from stereoscopy [1][2][3], to microscopy [4][5][6][7], particle image velocimetry [8], particle tracking and sizing [9], wavefront sensing [10][11][12][13] and photography, where it currently enables digital cameras with refocusing capabilities [14,15]. The capability of PI to simultaneously acquire multiple-perspective 2D images brings it among the fastest and most promising methods for 3D imaging with the available technologies [16]. Indeed, high-speed and large-scale 3D functional imaging of neuronal activity has been demonstrated [7]. Furthermore, first studies for surgical robotics [17], endoscopic application [18] and blood-flow visualization [19] have been performed.The key component of standard plenoptic cameras is a microlens array inserted in the native image plane, that reproduces repeated images of the main camera lens on the sensor behind it [1,15]. This enables reconstruction of light paths, employed, in post-processing, for refocusing different planes, changing point of view and extending depth of field (DOF) within the acquired image. However, a fundamental trade-off between spatial and angular resolution is naturally built in standard plenoptic imaging. If N tot is the total number of pixels per line on the sensor, N x the number of microlenses per line, and N u the number of pixels per line associated with each microlens, then N x N u = N tot . Essentially, standard PI gives the same resolution and DOF one would obtain with a N u times smaller NA. The final advantage is thus practical rather than fundamental, and is limited * francesco.pepe@ba.infn.it † milena.dangelo@uniba.it to higher luminosity (hence SNR) of the final image and parallel acquisition of m...

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Diffraction-Limited Plenoptic Imaging with Correlated Light

et al. 2017

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“…By illuminating an object with an SPDC signal beam and detecting correlations between the momentum of the idler photons (defined by the transverse position of the single-mode detector) and the positions of the correlated signal photons (after the object) one can, in principle, record a complete Fourier ptychographic reconstruction without changing the illumination of the object. A proposal to harness EPR-like correlations in a similar way was recently proposed in the context of plenoptic imaging 29 .…”

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confidence: 99%

Phase and amplitude imaging with quantum correlations through Fourier Ptychography

Aidukas

Konda

Harvey

et al. 2019

Sci Rep

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Extracting as much information as possible about an object when probing with a limited number of photons is an important goal with applications from biology and security to metrology. Imaging with a few photons is a challenging task as the detector noise and stray light are then predominant, which precludes the use of conventional imaging methods. Quantum correlations between photon pairs has been exploited in a so called ‘heralded imaging scheme’ to eliminate this problem. However these implementations have so-far been limited to intensity imaging and the crucial phase information is lost in these methods. In this work, we propose a novel quantum-correlation enabled Fourier Ptychography technique, to capture high-resolution amplitude and phase images with a few photons. This is enabled by the heralding of single photons combined with Fourier ptychographic reconstruction. We provide experimental validation and discuss the advantages of our technique that include the possibility of reaching a higher signal to noise ratio and non-scanning Fourier Ptychographic acquisition.

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“…We have theoretically shown that CPI can be achieved by exploiting the correlation properties of both chaotic light [39,40] and entangled photons from spontaneous parametric down-conversion (SPDC) [41]. We have also performed the first experimental proof of CPI with chaotic light [42], and we are currently generalizing the experimental demonstration to entangled photons.…”

Section: Introductionmentioning

confidence: 94%

Correlation Plenoptic Imaging: An Overview

et al. 2018

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Plenoptic imaging (PI) enables refocusing, depth-of-field (DOF) extension and 3D visualization, thanks to its ability to reconstruct the path of light rays from the lens to the image. However, in state-of-the-art plenoptic devices, these advantages come at the expenses of the image resolution, which is always well above the diffraction limit defined by the lens numerical aperture (NA). To overcome this limitation, we have proposed exploiting the spatio-temporal correlations of light, and to modify the ghost imaging scheme by endowing it with plenoptic properties. This approach, named Correlation Plenoptic Imaging (CPI), enables pushing both resolution and DOF to the fundamental limit imposed by wave-optics. In this paper, we review the methods to perform CPI both with chaotic light and with entangled photon pairs. Both simulations and a proof-of-principle experimental demonstration of CPI will be presented.

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Correlation Plenoptic Imaging With Entangled Photons

Cited by 45 publications

References 28 publications

Diffraction-Limited Plenoptic Imaging with Correlated Light

Diffraction-Limited Plenoptic Imaging with Correlated Light

Phase and amplitude imaging with quantum correlations through Fourier Ptychography

Correlation Plenoptic Imaging: An Overview

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