US 11,781,906 B2
Self-adaptive electromagnetic energy attenuator
Noam Yona Gross, Haifa (IL); and Ariela Donval, Haifa (IL)
Assigned to ELBIT SYSTEMS LTD., Haifa (IL)
Filed by ELBIT SYSTEMS LTD, Haifa (IL)
Filed on Sep. 2, 2022, as Appl. No. 17/902,173.
Application 17/902,173 is a continuation of application No. PCT/IB2021/051830, filed on Mar. 4, 2021.
Claims priority of application No. 273118 (IL), filed on Mar. 5, 2020.
Prior Publication US 2023/0139136 A1, May 4, 2023
Int. Cl. G01J 1/04 (2006.01); H04N 23/52 (2023.01); H04N 23/11 (2023.01); G01J 3/02 (2006.01); G01J 3/10 (2006.01); G02B 5/20 (2006.01); B82Y 15/00 (2011.01); B82Y 20/00 (2011.01); G01J 1/02 (2006.01)
CPC G01J 1/0418 (2013.01) [G01J 1/0448 (2013.01); G01J 1/0488 (2013.01); G01J 3/0213 (2013.01); G01J 3/0237 (2013.01); G01J 3/108 (2013.01); G02B 5/206 (2013.01); G02B 5/208 (2013.01); H04N 23/11 (2023.01); H04N 23/52 (2023.01); B82Y 15/00 (2013.01); B82Y 20/00 (2013.01); G01J 2001/0276 (2013.01); G02B 2207/101 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensing system configured to receive scene electromagnetic (EM) radiation comprising a first wavelength (WL1) range and a second wavelength (WL2) range that is different from the WL1 range, the sensing system comprising:
at least one spectral filter configured to filter the received scene EM radiation to obtain, downstream of the at least one spectral filter, EM radiation in the WL1 range and the WL2 range; and
a self-adaptive EM energy attenuating structure configured to receive from the at least one spectral filter the EM radiation in the WL1 range and the WL2 range,
wherein the self-adaptive EM energy attenuating structure is further configured such that high intensity EM radiation at the WL1 range incident onto a portion of the self-adaptive EM energy attenuating structure, at an activation intensity exceeding an activation threshold, causes interband excitation of one or more electron-hole pairs to enable intraband transition by EM radiation in the WL2 range in the portion of the self-adaptive EM energy attenuating structure, thereby enabling absorption of high intensity EM radiation in the WL2 range by the portion of the self-adaptive EM energy attenuating structure.