Lucas & Mercanti, LLP
Infrared shielding film
The infrared shielding film has 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 a low-refractive-index material, respectively. 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. 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 ≦σ/ΔAv≦0.12 (1), wherein σ represents a variation in reflectivity, and ΔAv represents an amount of variation in average reflectivity.
KONICA MINOLTA, INC.
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