公开(公告)号：US10408979B2

公开(公告)日：2019-09-10

申请号：US15071446

申请日：2016-03-16

Applicant: AGC Inc.

Inventor： Asana Yoshioka ,  Kazuhiko Shiono ,  Hiroyuki Arishima ,  Hiroki Hotaka

IPC: F21V9/04 ,  F21V9/06 ,  G02B5/08 ,  G02B5/20 ,  B32B7/02 ,  B32B7/00 ,  G02B5/22 ,  G02B5/28

Abstract: Provided is an optical filter, which includes a light-absorbing layer and a light-reflecting layer and satisfies the following requirements: (i) in a spectral transmittance curve at an incident angle of 0°, an average transmittance over the 430-620 nm wavelength range is ≥80%, an average transmittance over the 430-450 nm wavelength range is ≥76%, an average transmittance over the 735-1100 nm wavelength range is ≤5%, and an average transmittance over the 350-395 nm wavelength is ≤5%; and (ii) there is a wavelength λ0(UV) with transmittance of 50% in the 400-425 nm wavelength range in the spectral transmittance curve at the incident angle of 0°, there is a wavelength λ30(UV) with transmittance of 50% in the 400-425 nm wavelength range in a spectral transmittance curve at an incident angle of 30°, and an absolute value of a difference between the wavelengths, |λ0(UV)−λ30(UV),| is ≤5 nm.