To make an illumination fixture hard to be discolored, and maintain its high reflectivity by surely shutting down gas to cause discoloration in high temperature environment without damaging adhesion between a silver reflective film and its protective film.
The illumination fixture 1 includes: a base material 3; a light source 4 housed in this base material 3; and a reflecting mirror 2 installed on this base material 3. The reflecting mirror 2 includes: the silver reflective film 8; first and second oxide films 7, 9 sequentially laminated as the protective film respectively on both faces of the silver reflective film 8; and first and second metal films 6, 10. Since respective metal films 6, 10 have a metal element of which the melting point is higher or lower in ionization tendency, or easier to form passivity than respective oxide films 7, 9, it becomes difficult to react at an interface of respective film layers with the oxide films 7, 9 in high temperature environment. Accordingly, the silver reflective film 8, the respective oxide films, and the respective metal films are sequentially contacted with high adhesion, durability of the reflecting mirror 2 is maintained in the high temperature environment, gas to cause discoloration can be shut down surely, the silver reflective film 8 becomes hard to be discolored, and high reflectivity can be maintained.
| JP2019029052 | LIGHT GUIDE PLATE |
| JP3250888 | MATTE REFLECTIVE FILM |
| JPS56121028 | ILLUMINATION SOURCE DEVICE |
AOKI SHINICHI
YAMAUCHI SATORU
WATANABE KATSUMI
Katsumi Taguchi
Shinichi Mizuta
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