| 摘要 |
PROBLEM TO BE SOLVED: To provide the reflection enhancing film for a reflective mirror for near infrared rays, which exhibits a high reflectivity with a small number of coating layers and has a sufficiently high adhesion strength and environmental durability and to provide its production method. SOLUTION: The reflection enhancing film for near infrared rays is comprised of a substrate 1 composed of Cu, Si, DK-7 glass or a silica glass, a Au film layer which is applied through Cr, Ti or Ni layer 5 on the substrate 1, a buffer layer 7 which is applied on the Au film layer and composed of ZnSe or ZnS and alternately laminated layers on the buffer layer, which layers are constituted of a layer 2 having a low reflectivity and comprising any of YF3, YbF3 or DyF3 and a layer 3 having a high reflectivity and comprising ZnSe or ZnS.
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