US 12,163,879 B2
Quantum entanglement-based detection system (QE-bDS)
Jeffrey H. Hunt, Thousand Oaks, CA (US); and Pamela L. Blake, Huntington Beach, CA (US)
Assigned to THE BOEING COMPANY, Chicago, IL (US)
Filed by THE BOEING COMPANY, Chicago, IL (US)
Filed on Dec. 9, 2021, as Appl. No. 17/546,545.
Claims priority of provisional application 63/123,600, filed on Dec. 10, 2020.
Prior Publication US 2022/0187200 A1, Jun. 16, 2022
Int. Cl. G01N 21/31 (2006.01)
CPC G01N 21/3103 (2013.01) 16 Claims
OG exemplary drawing
 
1. A detection system comprising:
a target band entangled photon pair emitter configured to emit a target band sensing photon and a target band local photon, the target band sensing photon being directed to an object;
a target band detector configured to receive the target band local photon and output a signal when the target band local photon indicates that the target band sensing photon has encountered a predetermined material in the object;
a guard band entangled photon pair emitter configured to emit a guard band sensing photon and a guard band local photon at a guard wavelength, the guard band sensing photon being directed to the object; and
a guard band detector configured to receive the guard band local photon and output a signal if the guard band local photon indicates any changes in the guard band sensing photon,
wherein the guard wavelength is outside an absorption band for the predetermined material.