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

IPC: G02B1/10 ,  B60R1/00 ,  G02B13/14

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).