Abstract
At THz frequencies, many building materials exhibit mirror-like reflectivity, greatly facilitating the 3D spatial location estimate of non-line-of-sight objects. Using a custom THz measurement setup that employs a high sensitivity room temperature THz sensor, we measure the spatial and angular components of the radiation from hidden objects scattered from rough walls. The three-dimensional location of a thermally elevated object can then be determined using this “light field” information together with a refocusing algorithm. We experimentally demonstrate accurate location estimates of human-like NLOS objects in realistic situations.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 41911-41921 |
| Number of pages | 11 |
| Journal | Optics Express |
| Volume | 30 |
| Issue number | 23 |
| DOIs | |
| State | Published - Nov 7 2022 |
Bibliographical note
Funding Information:Defense Advanced Research Projects Agency (DARPA), REVEAL Program, (HR0011-16-C-0024). Sasaki carried out the computations related to the location estimation, performed experiments using the LWIR radiations, and drafted the manuscript. Grossman established the THz light field measurement facility including the room temperature THz detector and conducted the THz light field measurements. Leger provided the fundamental concept of this study and proposed to use the THz radiation for extending the NLOS location estimation performances. All authors read and approved the final paper. We would also like to thank Connor Hashemi for his help with the signal processing.
Publisher Copyright:
© 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
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