Granted Patent B2

US 12,414,278 · App. 17/032,793 · Granted Sep 9, 2025

Inventors: Ralph Korenstein (Natick, MA); Catherine Trent (Allen, TX)

Assignee: Raytheon Company

H05K9/0084C23C14/14C23C14/48G02B5/204G02B5/208G02B1/11G02B1/14

Abstract

Claims (31)

1. An electro-optical or infrared (EO/IR) sensor, comprising:

an aperture having a substrate;

a coating applied to a surface of the substrate, wherein the coating has:

a thickness of between 0.5 μm and 5 μm;

a radio frequency (RF) isolation at a RF level of 10 GHz or higher; and

an IR transmission level of at least about 85%

wherein the coating comprises the formula BaCuChF, wherein Ch is S, Se, or Te.

2. The EO/IR sensor of claim 1 , wherein the coating is a thin film.

3. The EO/IR sensor of claim 1 , wherein the coating is characterized by a grain size of less than about 100 nm.

4. The EO/IR sensor of claim 3 , wherein the coating is characterized by a grain size of between about 10 nm and about 100 nm.

5. The EO/IR sensor of claim 1 , wherein Ba may be partially substituted with Li, Na, or K.

6. The EO/IR sensor of claim 1 , wherein the coating comprises BaCuSF.

7. The EO/IR sensor of claim 1 , wherein the coating further comprising implanted ions.

8. The EO/IR sensor of claim 7 , wherein the implanted ions comprise Li + , Na + , and/or H + .

9. The EO/IR sensor of claim 1 , wherein the coating is characterized by an IR transmission of at least about 85%.

10. The EO/IR sensor of claim 1 , further comprising a protective or antireflective coating on the coating.

11. The EO/IR sensor of claim 1 , wherein the aperture substrate comprises any optical substrate.

12. A system comprising an EO/IR sensor of claim 1 .

13. A method of protecting an EO/IR sensor from RF interference, comprising:

depositing a coating on an aperture of the EO/IR sensor, wherein the coating is deposited such that the coating has:

a thickness of between 0.5 μm and 5 μm;

a radio frequency (RF) isolation at a RF level of 10 GHz or higher; and

an IR transmission level of at least about 85%

wherein the coating comprises the formula BaCuChF, wherein Ch is S, Se, or Te.

14. The method of claim 13 , wherein Ba may be partially substituted with Li, Na, or K.

15. The method of claim 13 , wherein the coating comprises BaCuSF.

16. The method of claim 13 , wherein deposition is performed via a nanofabrication technique.

17. The method of claim 13 , wherein the coating is deposited in a single pass.

18. The method of claim 13 , wherein the coating is deposited on any optical substrate of the aperture.

19. The method of claim 13 , further comprising implanting ions into the coating.

20. The method of claim 13 , further comprising depositing a protective, durable coating on the coating.

Assignments (1)

Continuity (2)

References Cited (83)