| abstract |
PROBLEM TO BE SOLVED: To provide a viewing window member and a method for manufacturing the same, which are not easily discolored by heat processing, crystallization treatment or heat during combustion of a curved surface or a bent portion, have a constant film thickness, and have characteristics and appearance that do not vary from place to place. The purpose is to provide. A viewing window member according to the present invention includes a base material made of low-expansion glass, and a semi-transmissive member made of a low-refractive index dielectric film and a high-refractive index dielectric film alternately formed on the surface of the base material. And a low-refractive index dielectric film and a high-refractive index dielectric film are made of an oxide, a typical metal nitride, or a typical non-metal nitride. [Selection] Figure 1 |