The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2025
Filed:
Feb. 01, 2022
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
Kuniaki Amemiya, Tsukuba, JP;
Yuhei Shimizu, Tsukuba, JP;
Abstract
Provided are an infrared absorber having extremely low reflectivity in the wavelength band of infrared rays, a method for manufacturing the same, a black-body radiation device, and a radiative cooling device. Provided is an infrared absorberprovided with: an absorption layercomprising carbon black and a resin; and, on the absorption layer, a surface layerthat comprises a resin including essentially no pigment and that has an optical confinement structurein which a plurality of minute projections are formed on the surface thereof, the hemispherical total reflectivity of the infrared absorberin infrared wavelengths of 5-15 μm being 0.2% or less. Further provided are a method for manufacturing the infrared absorber, a black-body radiation device, and a radiative cooling device.