Ghost imaging with a single detector

Abstract

We experimentally demonstrate pseudothermal ghost imaging and ghost diffraction using only a single single-pixel detector. We achieve this by replacing the high resolution detector of the reference beam with a computation of the propagating field, following a recent proposal by Shapiro [J. H. Shapiro, arXiv:0807.2614 (2008)]. Since only a single detector is used, this provides an experimental evidence that pseudothermal ghost imaging does not rely on non-local quantum correlations. In addition, we show the depth-resolving capability of this ghost imaging technique.Comment: See video at http://www.weizmann.ac.il/home/feori/Misc.html Comments are welcom

Single-pixel digital ghost holography

“…[22]. The SNR of the images recovered with DGH increases proportionally to N, in contrast to √ N as in conventional ghost imaging [11,12].…”

“…2 of the intensity reconstruction of the ghost Fourier hologram are compared with those obtained from computational ghost imaging through the algorithm detailed in Ref. [12]. The parameters used in the DGH calculations are the same as those considered in Fig.…”

“…In this way, only the beam path corresponding to the single-pixel detector needs to be in the setup, as the propagation through the other arm is calculated offline. This hybrid digital-optical scheme enables three-dimensional sectioning while simply using a point detector [12]. The computation comes at the expense of storing and processing thousands of speckle patterns to achieve an image with a suitable signal-to-noise ratio (SNR), a problem that can be partly alleviated by using compressive sensing algorithms [22].…”

“…It permits one to use singlepixel detectors [12], offers enhanced robustness to weakly absorbing samples [13], features the cancellation of optical aberrations [14], and can be used for image encryption [15]. In its most standard configuration, two light beams from a common light source propagate through different optical systems.…”

Compressive microscopic imaging with “positive–negative” light modulation

“…This modified technique was called computational GI by Shapiro [15] and demonstrated by Bromberg et al [16]. But a few months earlier, the same optical protocol had been proposed and demonstrated independently by Baraniuk et al, who combined it with the compressive sampling (compressed sensing) algorithm [17][18][19], and called it "Single-pixel imaging via compressive sampling" [20,21].…”