NEAR-INFRARED REFLECTIVE FILM AND NEAR-INFRARED REFLECTIVE GLASS USING SAME

摘要

[Problem] To provide a near-infrared reflective film having a superior reflection peak in the near-infrared region, in which reflection peaks such as ripples that can occur in the visible region are suppressed. [Solution] A near-infrared reflective film having a support, and a dielectric multilayer film disposed on the support, in which high-refractive-index layers and low-refractive-index layers are alternately layered, wherein an arbitrary high-refractive-index layer and the low-refractive-index layer that is adjacent thereto satisfy the relation 1.1 >= (dH × nH)/(dL × nL) > 1 or 1 > (dH × nH)/(dL × nL) >= 0.9 (where dH represents the thickness of the high-refractive-index layer, nH represents the refractive index of the high-refractive-index layer, dL represents the thickness of the low-refractive-index layer, nL represents the refractive index of the low-refractive-index layer, dH × nH represents the optical film thickness of the high-refractive-index layer, and dL × nL represents the optical film thickness of the low-refractive-index layer), the dielectric multilayer film has a dielectric film group set comprising a first dielectric film group comprising at least three each of the high-refractive-index layer (refractive index n1H, thickness d1H) and the low-refractive-index layer (refractive index n1L, thickness d1L), and a second dielectric film group comprising at least three each of the high-refractive-index layer (refractive index n2H, thickness d2H) and the low-refractive-index layer (refractive index n2L, thickness d2L) adjacent to the reverse side of the first dielectric film group from the support, the dielectric film group set satisfying the relations 1.10 >= d2H/d1H > 1 and 1.10 >= d2L/d1L > 1.