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公开(公告)号:US20230194759A1
公开(公告)日:2023-06-22
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).