| 摘要 |
To obtain an infrared shielding film, which is produced at low costs, whose surface area can be enlarged, which suppresses visible color unevenness by reducing the reflectivity unevenness in the visible light region, and which has highly robust optical reflection characteristics with respect to the variation in film thickness. The present invention provides an infrared shielding film having at least one unit formed by stacking a high-refractive-index layer and a low-refractive-index layer, the layers containing a high-refractive-index material and alow-refractive-index material, respectively, the materials having different refractive indices with each other, wherein the high-refractive-index layer and the low-refractive-index layer each contains at least one polymer, the infrared shielding film has a mixed region containing the high-refractive-index material and the low-refractive-index material between the high-refractive-index layer and the low-refractive-index layer, the mixing ratio of the high-refractive-index material and the low-refractive-index material continuously changes in the mixed region, and the infrared shielding film satisfies a following formula (1) in a visible light wavelength region and at light incident angles of 0°, 40° and 80°: 0.01 ‰¤ Ã/”Av ‰¤ 0.12 (1), wherein à represents a variation in reflectivity, and ”Av represents an amount of variation in average reflectivity. |
