Computational temporal ghost imaging

TL;DR

This paper introduces a simple computational ghost imaging device capable of reconstructing a single non-reproducible temporal signal in a single shot using spatial intensity correlations and a CMOS camera, enabling monochrome or wavelength-multiplexed signals.

Contribution

The authors present a novel, single-shot ghost imaging method for temporal signals that does not require multiple copies or repetitions of the object, simplifying previous approaches.

Findings

Successful reconstruction of single temporal signals in one shot.

Ability to perform wavelength multiplexing with color images.

Device operates without temporal resolution on the camera.

Abstract

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.