公开(公告)号：US20220011484A1

公开(公告)日：2022-01-13

申请号：US17448562

申请日：2021-09-23

Applicant: AGC Inc.

Inventor： Kazuhiko SHIONO ,  Motoshi NAKAYAMA ,  Sayuri YAMADA ,  Takuro SHIMADA ,  Masumi MIYAZAKI ,  Aya ITO ,  Tatsuo YOKOTE

IPC: G02B5/20 ,  C09B57/00

Abstract: An optical filter includes: a resin substrate including a resin (P) which has a glass transition temperature of 200° C. or higher and which has specific transmittance properties; an external resin layer; and dielectric multilayer films. In a case where the external resin layer includes the polyimide resin, the optical filter includes an intermediate resin layer including a cycloolefin resin. At least one of the dielectric multilayer films is a near-infrared reflection layer. At least one of the external resin layer and the intermediate resin layer contains a near-infrared absorbing dye (A). The near-infrared absorbing dye (A) has a maximum absorption wavelength within a wavelength range of 800 nm to 1,200 nm. The proportion of a total thickness of members including a resin having a glass transition temperature of 200° C. or higher to a total thickness of the resin-including members is 85% or higher.

公开(公告)号：US20210255374A1

公开(公告)日：2021-08-19

申请号：US17227520

申请日：2021-04-12

Applicant: AGC Inc.

Inventor： Ryota MURAKAMI ,  Kensuke ONO ,  Motoshi NAKAYAMA

IPC: G02B5/18 ,  G01S17/931 ,  G01S7/481 ,  G02B27/44

Abstract: A diffractive optical element includes: a diffraction unit; and a lens unit disposed on a light incident side of the diffraction unit. The lens unit includes: a substrate; and a protrusion and recess portion disposed on a side opposite to a light incident side of the substrate. The protrusion and recess portion includes: a periodic structure of a relief-protrusion portion disposed in a central part, a periodic structure of a stepwise grating disposed in a central part simulating the relief-protrusion portion, or a combination thereof; and a grating disposed in a portion other than the central part. The number of steps of the stepwise grating disposed in the central part is larger than the number of steps of the grating disposed in the portion other than the central part.

公开(公告)号：US20210191012A1

公开(公告)日：2021-06-24

申请号：US17193151

申请日：2021-03-05

Applicant: AGC Inc.

Inventor： Kazuhiko SHIONO ,  Motoshi NAKAYAMA ,  Tatsuo YOKOTE ,  Aya ITO

IPC: G02B5/20 ,  G02B1/04 ,  C09B57/00 ,  C09B67/20 ,  H01L27/146

Abstract: An optical filter includes: a resin substrate having a thickness of 20 μm or more and 110 μm or less; an absorption layer having a thickness of 0.25 μm or more and 12 μm or less and being disposed on at least one principal surface of the resin substrate; and dielectric multilayer films disposed as an outermost layer on both principal surfaces of the resin substrate. At least one of the dielectric multilayer films is a near-infrared reflection layer. The resin substrate includes a first transparent resin having a glass transition temperature of 170° C. or more and having specific optical properties. The absorption layer includes a near-infrared absorbing dye (A) and a second transparent resin having a glass transition temperature of 170° C. or more, and the near-infrared absorbing dye (A) satisfies specific optical properties in relation to the second transparent resin.