公开(公告)号：US20190212261A1

公开(公告)日：2019-07-11

申请号：US16352351

申请日：2019-03-13

Applicant: FLIR Systems AB

Inventor： Tomas Lannestedt ,  Ulf Wallgren ,  Jonas Sandsten

IPC: G01N21/3504 ,  G01J3/427

CPC classification number: G01N21/3504 ,  G01J3/427 ,  G01N2201/0221

Abstract: Systems and methods disclosed herein provide for detecting gas by: illuminating, with a controllable illuminator system, a scene with light including radiation within the infrared (IR) wavelength range; controlling the illuminator system to emit light at a first wavelength corresponding to a first absorption level of a gas and at a second wavelength corresponding to a second absorption level of a gas, such that an equal amount of radiant energy over a time period is emitted onto the scene for each of said first and second wavelengths; and capturing a first IR image of the scene being illuminated with light at said first wavelength and a second IR image of the scene illuminated with light at said second wavelength, and comparing said first and second IR images to determine whether a characteristic for at least one specific gas is represented in said first and/or second IR images.

公开(公告)号：US11573172B2

公开(公告)日：2023-02-07

申请号：US16352351

申请日：2019-03-13

Applicant: FLIR Systems AB

Inventor： Tomas Lannestedt ,  Ulf Wallgren ,  Jonas Sandsten

IPC: G01N21/3504 ,  G01J3/427

Abstract: Systems and methods disclosed herein provide for detecting gas by: illuminating, with a controllable illuminator system, a scene with light including radiation within the infrared (IR) wavelength range; controlling the illuminator system to emit light at a first wavelength corresponding to a first absorption level of a gas and at a second wavelength corresponding to a second absorption level of a gas, such that an equal amount of radiant energy over a time period is emitted onto the scene for each of said first and second wavelengths; and capturing a first IR image of the scene being illuminated with light at said first wavelength and a second IR image of the scene illuminated with light at said second wavelength, and comparing said first and second IR images to determine whether a characteristic for at least one specific gas is represented in said first and/or second IR images.