公开(公告)号：US20230296818A1

公开(公告)日：2023-09-21

申请号：US18323010

申请日：2023-05-24

Applicant: AGC Inc.

Inventor： Kazuhiko SHIONO ,  Nanako NISHIMOTO ,  Sayuri YAMADA ,  Hiroki HOTAKA ,  Satoshi OKADA ,  Keigo MATSUURA

IPC: G02B5/28 ,  C09B23/08 ,  G02B5/20 ,  C09K3/00

CPC classification number: G02B5/282 ,  C09B23/083 ,  G02B5/208 ,  C09K3/00

Abstract: An optical filter includes: an absorption layer including a first near-infrared absorbing dye (D1), a second near-infrared absorbing dye (D2), and a transparent resin; and a reflection layer including a dielectric multilayer film. The dye (D1) and the dye (D2) are squarylium compounds satisfying following (1) to (3). (1) The dye (D1) has a maximum absorption wavelength λmax(D1) within a range of 680 to 730 nm, and the difference between a wavelength at which a transmittance is 80% on the shorter wavelength side than λmax(D1) when the concentration is adjusted such that a transmittance at λmax(D1) is 10%, and λmax(D1) is 100 nm or less. (2) The dye (D2) has a maximum absorption wavelength λmax(D2) within a range of 720 to 770 nm. (3) A value obtained by subtracting λmax(D1) from λmax(D2) is 30 nm or more and 85 nm or less.