# US 11,307,331 B1 · High-performance optical absorber comprising functionalized, non-woven, CNT sheet and texturized polymer film or texturized polymer coating and manufacturing method thereof

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- Number: US 11,307,331 B1
- Document ID: US11307331B1
- Status: Granted
- Kind: B1
- Application number: 17/412,381
- Filed: 2021-08-26
- Granted: 2022-04-19
- Earliest claimed: 2020-12-29
- Assignees: Northrop Grumman Systems Corporation
- Applicants: Northrop Grumman Systems Corporation
- Inventors: John A. Starkovich; Edward M. Silverman
- Web page: https://patentgrep.com/patent/US11307331B1

## CPC

- G02B 5/003: {Light absorbing elements}
- B29C 65/4895: {Solvent bonding, i.e. the surfaces of the parts to be joined being treated with solvents, swelling or softening agents, without adhesives}
- B29C 66/1122: {Single lap to lap joints, i.e. overlap joints (B29C66/45, B29C66/472, B29C66/52272 take precedence)}
- B29C 66/45: {Joining of substantially the whole surface of the articles (methods or apparatus for laminating B32B37/00)}
- B29C 66/7294: {Non woven mats, e.g. felt}
- B29C 66/7444: {Carbon}
- B29D 11/0074: {Production of other optical elements not provided for in B29D11/00009- B29D11/0073}
- B33Y 80/00: Products made by additive manufacturing
- G01J 5/0853: {having infrared absorbers other than the usual absorber layers deposited on infrared detectors like bolometers, wherein the heat propagation between the absorber and the detecting element occurs within a solid}
- G02B 5/045: {Prism arrays}
- B29L 2011/00: Optical elements, e.g. lenses, prisms
- B29L 2016/00: Articles with corrugations or pleats (B29L2023/18, {B29L2024/003} take precedence)
- B82Y 20/00: Nanooptics, e.g. quantum optics or photonic crystals
- B82Y 40/00: Manufacture or treatment of nanostructures
- G02B 2207/101: Nanooptics
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES

## Abstract

A high-performance optical absorber, having a texturized base layer, the base layer comprising one or more of a polymer film and a polymer coating; and a surface layer located above and immediately adjacent to the base layer. The surface layer is joined to the base layer and the surface layer has a plasma-functionalized, non-woven carbon nanotube (CNT) sheet, wherein the base layer texturization comprises one or more of substantially rectangular ridges, substantially triangular ridges, substantially pyramidal ridges, and truncated, substantially pyramidal ridges.

## Claims

### Claim 1

A high-performance optical absorber, comprising:
a texturized base layer, the base layer comprising one or more of a polymer film and a polymer coating; and
a surface layer located above and immediately adjacent to the base layer, the surface layer joined to the base layer, the surface layer comprising a plasma-functionalized, non-woven carbon nanotube (CNT) sheet, wherein the base layer texturization comprises one or more of substantially rectangular ridges, substantially triangular ridges, substantially pyramidal ridges, and truncated, substantially pyramidal ridges, wherein the CNT sheet has a porosity between approximately 40% and approximately 90%.