Patent ID: 9188720
Filing Date: 2015-11-17
Classification: G02B

Abstract:
1. An infrared cut filter comprising: a transparent dielectric substrate; an infrared reflecting layer formed on one surface of the transparent dielectric substrate and configured to reflect infrared light; and an infrared absorbing layer formed on the other surface of the transparent dielectric substrate and configured to absorb infrared light, and formed by encapsulating infrared absorbing pigment in a matrix formed by a sol-gel method to contain silica as a main component, wherein the infrared reflecting layer is formed of a dielectric multilayer film, given that a wavelength that provides the transmittance of 50% of the infrared reflecting layer, when an incident angle is 0°, is λ given that a cut-off wavelength that provides the transmittance of 50% of the infrared cut filter, when the incident angle is 0°, is λ