公开(公告)号：US12222532B2

公开(公告)日：2025-02-11

申请号：US18674386

申请日：2024-05-24

Applicant: AGC Inc.

Inventor： Kenta Sekikawa ,  Hiromichi Nagayama ,  So Ishido

IPC: G02B5/30 ,  G02B3/00

Abstract: An optical element includes a three-dimensional structure having a curved surface; and a retardation plate bent along the curved surface. The retardation plate includes a transparent substrate and a liquid crystal layer formed over the transparent substrate. The retardation plate has a slow axis and a fast axis. A glass-transition temperature, Tgne, in a slow axis direction of the retardation plate is higher than a glass-transition temperature, Tgno, in a fast axis direction of the retardation plate.

公开(公告)号：US12032193B2

公开(公告)日：2024-07-09

申请号：US18162909

申请日：2023-02-01

Applicant: AGC Inc.

Inventor： Kenta Sekikawa ,  Hiromichi Nagayama ,  So Ishido

IPC: G02B5/30 ,  G02B3/00

CPC classification number: G02B5/3091 ,  G02B3/0018 ,  G02B5/3016 ,  G02B5/3041

Abstract: An optical element includes a three-dimensional structure having a curved surface; and a retardation plate bent along the curved surface. The retardation plate includes a transparent substrate and a liquid crystal layer formed over the transparent substrate. The retardation plate has a slow axis and a fast axis. A glass-transition temperature, Tgne, in a slow axis direction of the retardation plate is higher than a glass-transition temperature, Tgno, in a fast axis direction of the retardation plate.

公开(公告)号：US10605969B2

公开(公告)日：2020-03-31

申请号：US15620218

申请日：2017-06-12

Applicant: AGC Inc.

Inventor： So Ishido ,  Atsushi Koyanagi

IPC: G02B1/14 ,  G02B5/20 ,  G02B5/28 ,  C09B57/00 ,  H04N5/33 ,  G01J1/04 ,  G02B5/22 ,  C09B67/44 ,  C09B67/46 ,  C09B67/22

Abstract: An optical filter is provided with a structure that contains a green coloring matter and a black coloring matter and satisfies the following requirements (i) and (ii). Further a device is provided with such an optical filter. (i) An average transmittance of light in the wavelength range of 400 to 730 nm is 2% or less. (ii) A continuous 50 nm wavelength range where an average transmittance is 80% or more exists in the wavelength range of 800 to 1000 nm.