Single-photon sensitive light-in-fight imaging

Gariépy, Geneviève; Krstajić, Nikola; Henderson, Robert K.; Li, Chunyong; Thomson, Robert R.; Buller, Gerald S.; Heshmat, Barmak; Raskar, Ramesh; Leach, Jonathan; Faccio, Daniele

doi:10.1038/ncomms7021

Cited by 213 publications

(144 citation statements)

References 29 publications

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“…More prospectively, with the development and integration of cameras (e.g. ST AM P [19], CU P [20] or SP AD [21] cameras) or spatial encoding technologies that can operate at T Hz frame, our method offers possible perspectives to perform accurate single-shot measurement of any weak, unique and fast spatiotemporal phenomenon that will affect either the light source before transmission through a transparent or complex medium or the transmission of light through these media. Finally, the number of channels for multi-spectral temporal ghost imaging can be seriously improved by designing a CCD or CMOS array with a more complex Bayer-like filter placed in front of the pixels.…”

Section: Discussionmentioning

confidence: 99%

Computational temporal ghost imaging

Devaux¹,

Moreau²,

Denis³

et al. 2016

Optica

107

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Ghost imaging is a fascinating process, where light interacting with an object is recorded without resolution, but the shape of the object is nevertheless retrieved, thanks to quantum or classical correlations of this interacting light with either a computed or detected random signal. Recently, ghost imaging has been extended to a time object, by using several thousands copies of this periodic object. Here, we present a very simple device, inspired by computational ghost imaging, that allows the retrieval of a single non-reproducible, periodic or non-periodic, temporal signal. The reconstruction is performed by a single shot, spatially multiplexed, measurement of the spatial intensity correlations between computer-generated random images and the images, modulated by a temporal signal, recorded and summed on a chip CMOS camera used with no temporal resolution. Our device allows the reconstruction of either a single temporal signal with monochrome images or wavelength-multiplexed signals with color images.

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Section: Discussionmentioning

confidence: 99%

Computational temporal ghost imaging

Devaux¹,

Moreau²,

Denis³

et al. 2016

Optica

107

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show abstract

“…This is the approach used by some of the fastest timeresolved imaging systems in the world (e.g. [10]), but can also useful in less exotic applications such as fluorescence imaging. However, simply accumulating images provided by a conventional high-speed camera may not give the desired results; additional requirements must be met by the camera system to ensure that the signal is properly accumulated without also accumulating noise or other errors.…”

Section: Factors To Consider For Highspeed Imagingmentioning

confidence: 99%

Fast Mover

2015

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The realm of high-speed imaging traditionally provides some of the most visually appealing images for the non-specialist. From bullets passing through objects to the minute details of animal behaviour, the ability to freeze time opens the way to unique insights into the world around us, as well as providing a valuable tool for analysis and test in an industrial environment. Often associated with high costs and complex operation, new approaches to capturing critical high-speed events are being developed which can enable scientists and engineers to use high-speed imaging as a routine tool rather than a specialist discipline. By synchronizing high-power illumination pulses with tightly controlled image sensor exposures, while at the same time providing on-board image storage and in-situ processing, a simple and flexible highspeed imaging architecture is realized, capable of wide ranging application. High-speed imaging provides unique insights into processesFrom the seminal work of Eadweard Muybridge in the late nineteenth century analysing the gait of a galloping horse [1] to the latest advances in femto-photography [2], high-speed imaging has a rich history of providing new information about motions, events, and processes. In today's industrial and scientific environments, highspeed imaging is predominately used for scientific analysis or test and measurement applications, with vehicle collision studies [3] probably the most commonly recognized. Other significant applications include particle imaging velocimetry (PIV) [4] whereby images are taken of fluid flows and particle velocities extracted as a tool for aerodynamic engineering, human motion analysis [5], as well as failure mode dynamics and analysis [6], impact testing, and ballistics research [7]. More recently, there has been increasing interest from the biological and nanotechnology sectors [8] to adapt high-speed techniques and leverage the advantages that high-speed technology brings, such as the visualization of MEMS devices.In each case it is the insight that is obtained by viewing events happening on a timescale much faster than humans are capable of visualizing, which provides the ultimate value to the user. Factors to consider for highspeed imagingHigh-speed imaging relies on the ability to capture an optical image of a scene in a short period of time. Using shorter periods of time for scene capture, generally corresponds to an increased ability to "freeze" fast moving events. It is this ability to capture short moments in time which provides the useful diagnostic information used in applications. A typical approach to capturing an image in a short period of time is to simply decrease the exposure time of the camera. Typical image sensors used within machine vision cameras have minimum exposure times in the range 5-15 microseconds, whilst dedicated high-speed imaging systems can operate with exposure times lower than 200 ns. If the object odos imaging LimitedEdinburgh, Scotland odos imaging Limited is a technology focused company specialising in th...

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“…Following the method of Gariepy et al [16], we operate a camera consisting of a 32x32 array of single-photon avalanche diodes (SPADs) in the time-correlated, singlephoton counting mode, with the SPADs triggered off of the EOM. We detect photons scattered by the slow-light medium that travel out of the medium perpendicular to the direction of pulse propagation, along the x axis as shown in Fig.…”

Section: Light In Flight Imagingmentioning

confidence: 99%

“…In this work, we take advantage of light-in-flight imaging techniques in conjunction with a camera comprised of an array of single-photon avalanche diodes (SPAD camera) [16][17][18] to simultaneously detect in situ both the spatial compression and the temporal dispersion of a pulse of light traveling through a slow-light medium. Here the medium consists of a hyperfine absorption doublet in hot Rb vapour.…”

Section: Introductionmentioning

confidence: 99%

Slow light in flight imaging

et al. 2017

Self Cite

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Slow-light media are of interest in the context of quantum computing and enhanced measurement of quantum effects, with particular emphasis on using slow-light with single photons. We use light-inflight imaging with a single photon avalanche diode camera-array to image in situ pulse propagation through a slow light medium consisting of heated rubidium vapour. Light-in-flight imaging of slow light propagation enables direct visualisation of a series of physical effects including simultaneous observation of spatial pulse compression and temporal pulse dispersion. Additionally, the singlephoton nature of the camera allows for observation of the group velocity of single photons with measured single-photon fractional delays greater than 1 over 1 cm of propagation.

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Single-photon sensitive light-in-fight imaging

Cited by 213 publications

References 29 publications

Computational temporal ghost imaging

Computational temporal ghost imaging

Fast Mover

Slow light in flight imaging

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