US 12,474,262 B2
Single-shot multi-frame ultrafast terahertz imaging method and system
Junliang Dong, Longueuil (CA); Pei You, Urbana, IL (US); Alessandro Tomasino, Lausanne (CH); Aycan Yurtsever, Longueuil (CA); Yoann Jestin, Montreal (CA); and Roberto Morandotti, Montreal (CA)
Assigned to INSTITUT NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Quebec (CA)
Appl. No. 18/569,343
Filed by INSTITUT NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Quebec (CA)
PCT Filed Jun. 14, 2022, PCT No. PCT/CA2022/050942
§ 371(c)(1), (2) Date Dec. 12, 2023,
PCT Pub. No. WO2023/272377, PCT Pub. Date Jan. 5, 2023.
Claims priority of provisional application 63/202,886, filed on Jun. 29, 2021.
Prior Publication US 2024/0385110 A1, Nov. 21, 2024
Int. Cl. G01N 21/3586 (2014.01); G01N 21/17 (2006.01); G03B 39/00 (2021.01); G01N 21/21 (2006.01)
CPC G01N 21/3586 (2013.01) [G01N 21/17 (2013.01); G01N 2021/1765 (2013.01); G01N 2021/1791 (2013.01); G01N 21/21 (2013.01); G01N 2201/061 (2013.01); G03B 39/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for single-shot multi-frame ultrafast terahertz imaging of a scene, the system comprising:
a laser producing a pump beam and a probe beam;
a THz generator generating a THz beam from said pump beam, the THz beam being passed through the scene;
a multiplexer selected for multiplexing the probe beam in the time domain and in the spatial-frequency domain, yielding a multiplexed probe beam;
a THz detector detecting a THz beam passing through the scene;
a first optical lens guiding the multiplexed probe beam to the THz detector;
a polariser selected for conversion of the multiplexed probe beam into mutually orthogonal linear polarized beams;
a camera; and
a second optical lens selected for directing the mutually orthogonal linear polarized beams to the camera.