公开(公告)号：US20210165145A1

公开(公告)日：2021-06-03

申请号：US17109415

申请日：2020-12-02

Applicant: HOYA CORPORATION

Inventor： Takeshi YAMAZAKI

IPC: G02B5/20 ,  G02B5/28

Abstract: Provided is a near-infrared cut-off filter having excellent oblique incidence characteristics due to extremely low dependence on the angle of incidence, and a low transmittance in a wavelength region of 1000 nm or more. More particularly, the near-infrared cut-off filter includes a transparent substrate that is formed of glass containing iron atoms and has a half-value wavelength of greater than 630 nm on a long wavelength side of a transmittance curve and an average transmittance of 1% or less in a wavelength region of 1000 to 1200 nm; and a resin layer formed on at least one main surface of the transparent substrate to absorb light of a specific wavelength.

公开(公告)号：US20230367050A1

公开(公告)日：2023-11-16

申请号：US18220909

申请日：2023-07-12

Applicant: HOYA CORPORATION

Inventor： Haruna IMAI ,  Takeshi YAMAZAKI

IPC: G02B5/22 ,  G02B5/20

CPC classification number: G02B5/223 ,  G02B5/208 ,  G02B5/226 ,  G03B17/565

Abstract: A near-infrared cut filter is provided which has extremely low incident angle dependence and excellent oblique incidence characteristics. The near-infrared cut filter comprises a transparent substrate having a thickness of 0.16 to 0.26 mm and an average transmittance in a wavelength range of 800 to 1100 nm of 1% or less, and a resin layer formed at least one main surface of the transparent substrate and configured to absorb light of a specific wavelength.