公开(公告)号：US09638576B2

公开(公告)日：2017-05-02

申请号：US14763890

申请日：2014-02-06

Applicant: ASAHI KASEI MICRODEVICES CORPORATION

Inventor： Toshiaki Fukunaka ,  Edson Gomes Camargo ,  Sosuke Nishida ,  Yuta Takagi

IPC: G01J3/12 ,  H01L31/0232 ,  H01L31/09 ,  G01J1/04 ,  G01J5/04 ,  G01J5/08 ,  G01J5/02 ,  G01J3/28 ,  G02B3/00

CPC classification number: G01J3/12 ,  G01J1/0403 ,  G01J1/0407 ,  G01J1/0488 ,  G01J3/28 ,  G01J5/0205 ,  G01J5/04 ,  G01J5/045 ,  G01J5/046 ,  G01J5/0803 ,  G01J5/0862 ,  G01J2003/1213 ,  G01J2003/1282 ,  G02B3/0012 ,  H01L31/02325 ,  H01L31/09 ,  H01L2224/48091 ,  H01L2224/73265 ,  H01L2924/00014

Abstract: An infrared-sensor filter member includes an optical filter disposed in an opening portion of a second member and a first member. The infrared-sensor filter member includes a recess portion formed from a light-incident surface of the optical filter and the first member. At least a part of a bottom surface of the recess portion is formed by the light-incident surface and side walls of the recess portion, which are formed by the first member.

公开(公告)号：US12265069B2

公开(公告)日：2025-04-01

申请号：US18186191

申请日：2023-03-20

Applicant: Asahi Kasei Microdevices Corporation

Inventor： Masanori Masuda ,  Yuta Takagi

IPC: G01N21/3504 ,  G01N21/31 ,  G01N33/00

Abstract: Provided are a gas concentration measurement system, gas concentration computation section, and gas concentration measurement method enabling high-accuracy gas concentration measurement. The gas concentration measurement system includes: a gas concentration measurement section (10a) including a light-emitting element (11) and a first sensor element; a light-emitting element drive section that drives the light-emitting element; a signal acquisition section (21) that acquires at least an output signal of the first sensor element, a first drive signal that is a first voltage value or first current value of the light-emitting element, and a second drive signal that is a second voltage value or second current value of the light-emitting element; and a computation section (22) that computes gas concentration based on signals acquired by the signal acquisition section. The computation section, based on the first and second drive signals, corrects the output signal of the first sensor element and computes the gas concentration.

公开(公告)号：US11467144B2

公开(公告)日：2022-10-11

申请号：US16828957

申请日：2020-03-25

Applicant: Asahi Kasei Microdevices Corporation

Inventor： Yuta Takagi

IPC: G01N33/00 ,  G01N21/3504

Abstract: A light emitting and receiving apparatus includes a controller and a calculator. The controller acquires a first detection current from a light-receiving element when supplying a first drive current to a light-emitting element and acquires a second detection current from the light-receiving element when supplying a second drive current to the light-emitting element. The calculator generates a signal indicating deterioration of the light-emitting element when a reference value and an aging value satisfy a deterioration judgment condition, the aging value being a ratio between the first detection current and the second detection current. The detection accuracy of the light emitting and receiving apparatus is thereby improved.