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公开(公告)号：US12265202B2
公开(公告)日：2025-04-01
申请号：US18111518
申请日：2023-02-17
Applicant: AGC Inc.
Inventor： Yoji Yasui , Kazunobu Maeshige , Takahiro Mashimo , Takuji Oyama , Nobutaka Aomine , Manaya Kubono
Abstract: To appropriately suppress reflection of far-infrared rays, and appropriately form an antireflection film. A far-infrared ray transmission member (20) includes a base material (30) that transmits far-infrared rays, and a functional film (32) that is formed on the base material (30) and includes a low refractive index layer (34) containing oxide as a principal component and having a refractive index equal to or smaller than 1.5 with respect to light at a wavelength of 10 μm. The low refractive index layer (34) contains MgO as a principal component, and a content of MgO is equal to or larger than 50 mass % and equal to or smaller than 100 mass % with respect to the entire low refractive index layer (34).
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公开(公告)号：US11994699B2
公开(公告)日：2024-05-28
申请号：US17145536
申请日：2021-01-11
Applicant: AGC Inc.
Inventor： Hiroyuki Yamamoto , Takahiro Mashimo , Takuji Oyama , Shinya Tahara , Tatsuo Nagashima
Abstract: An optical member includes a transparent substrate containing at least one substance selected from glass, a glass ceramic, silicon, and sapphire, and having an infrared high-transmittance region in which an optical transmittance is 78% or more in a wavelength band of 700 nm to 1800 nm; and an optical interference film disposed on a main surface of the transparent substrate corresponding to the infrared high-transmittance region, wherein a transmittance of light, of the optical member, of at least one wavelength λ3 in the wavelength band of 700 nm to 1800 nm in a region of the optical member corresponding to the infrared high-transmittance region of the transparent substrate has a minimum value of 86.5% or more and has a difference between the minimum value and a maximum value of 9% or less in a range where an incidence angle is from 0 degrees to 60 degrees.
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