US 12,248,122 B2
SWIR-MWIR transparent, conductive coating for EMI protection of NCOC
Eric Riedel, Cambridge, MA (US); and Ralph Korenstein, Natick, MA (US)
Assigned to Raytheon Company, Arlington, VA (US)
Filed by Raytheon Company, Waltham, MA (US)
Filed on Feb. 1, 2021, as Appl. No. 17/164,157.
Prior Publication US 2022/0244431 A1, Aug. 4, 2022
Int. Cl. G02B 1/116 (2015.01); C23C 14/08 (2006.01); C23C 14/35 (2006.01); G02B 1/14 (2015.01); G02B 1/16 (2015.01)
CPC G02B 1/116 (2013.01) [C23C 14/081 (2013.01); C23C 14/086 (2013.01); C23C 14/35 (2013.01); G02B 1/14 (2015.01); G02B 1/16 (2015.01)] 16 Claims
OG exemplary drawing
 
1. A shortwave to midwave infrared (SWIR-MWIR) optical window comprising:
a substrate formed from a nanocomposite optical ceramic material and providing transmittance in the SWIR-MWIR spectrum; and
a coating disposed on the substrate to provide electromagnetic interference (EMI) protection, wherein the coating is electrically conductive and SWIR-MWIR transparent and wherein the coating comprises a doped zinc oxide material,
wherein the nanocomposite optical ceramic material is a multi-phase composite material formed of a mixture of two or more ceramic phases that are mutually insoluble, thereby forming a multi-phase grain structure having distinct phase separation between two or more constituents.