Abstract
Non-line-of-sight (NLOS) imaging enables monitoring around corners and is promising for diverse applications. The resolution of transient NLOS imaging is limited to a centimeter scale, mainly by the temporal resolution of the detectors. Here, we construct an up-conversion single-photon detector with a high temporal resolution of and a low noise count rate of 5 counts per second (cps). Notably, the detector operates at room temperature, near-infrared wavelength. Using this detector, we demonstrate high-resolution and low-noise NLOS imaging. Our system can provide a axial resolution and a 2 mm lateral resolution, which is more than 1 order of magnitude better than that in previous experiments. These results open avenues for high-resolution NLOS imaging techniques in relevant applications.
- Received 26 March 2021
- Accepted 25 June 2021
DOI:https://doi.org/10.1103/PhysRevLett.127.053602
© 2021 American Physical Society
Physics Subject Headings (PhySH)
synopsis
Corners Are No Barrier to Imaging Tiny Objects
Published 28 July 2021
An update to a technique for imaging around corners allows researchers to capture objects out of the line of sight that have a width of a few human hairs, 100 times tinier than previous demonstrations.
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