OPTICAL LAMINATE, METHOD FOR MANUFACTURING SAME, AND USE THEREOF

• Main Author: ONOMICHI HIROSHI
• Format: Patent
• Language: Chinese; English
• Published: 19.09.2023
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The present invention addresses the problem of providing an antireflection film which can suppress reflectance in a low wavelength region, can reduce light reflectance, and can improve the blackness of an image. To this end, the present invention provides an optical laminate in which an anti-glare layer and a low refractive index layer are laminated in this order on at least one surface of a base material layer, in which the skewness (Rsk) of the surface of the low refractive index layer is adjusted to less than 0, the standard deviation (sigma) of spectral reflectance in the wavelength range of 380-780 nm is adjusted to 0.5 or less, and the light reflectance is adjusted to 2.5 or less. The arithmetic average roughness (Ra) of the surface of the low refractive index layer is 0.01-0.5 [mu] m, the maximum cross-sectional height (Rt) of the profile curve is 0.1-1 [mu] m, and the average length (RSm) of the profile curve elements is 1-50 [mu] m. The optical laminate may have a haze of 30% or less and a total ligh