公开(公告)号：US11635370B2

公开(公告)日：2023-04-25

申请号：US16586809

申请日：2019-09-27

Applicant: FLIR Systems AB

Inventor： Hakan E. Nygren ,  Jonas Sandsten ,  Per Lilja ,  Marta Barenthin-Syberg ,  Henning Hagman ,  Eric A. Kurth ,  Brian B. Simolon ,  Naseem Y. Aziz ,  Ulf Wallgren

IPC: G01N21/3504 ,  H04N5/33 ,  G06T5/50

Abstract: An IR imaging device includes an optical element receiving infrared radiation from a scene, a filter blocking IR radiation outside of a particular range of wavelengths, an array of sensor pixels to capture an image of the scene based on infrared radiation received through the optical element and filter, the array of sensor pixels comprising a first array of sensor pixels to image gas in within a first spectral bandwidth, and a second array of sensor pixel to sense IR radiation in a second spectral bandwidth where gas is not detected, a read-out integrated circuit (ROIC) and logic circuitry to generate a first image sensed by the first array and a second image sensed by the second array, and gas detection logic to detect the presence of gas in the first image.

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：US20230366812A1

公开(公告)日：2023-11-16

申请号：US18306122

申请日：2023-04-24

Applicant: FLIR Systems AB

Inventor： Hakan E. Nygren ,  Jonas Sandsten ,  Per Lilja ,  Marta Barenthin-Syberg ,  Henning Hagman ,  Eric A. Kurth ,  Brian B. Simolon ,  Naseem Y. Aziz ,  Ulf Wallgren

IPC: G01N21/3504 ,  H04N5/33

CPC classification number: G01N21/3504 ,  H04N5/33 ,  G06T5/50

Abstract: An IR imaging device includes an optical element receiving infrared radiation from a scene, a filter blocking IR radiation outside of a particular range of wavelengths, an array of sensor pixels to capture an image of the scene based on infrared radiation received through the optical element and filter, the array of sensor pixels comprising a first array of sensor pixels to image gas in within a first spectral bandwidth, and a second array of sensor pixel to sense IR radiation in a second spectral bandwidth where gas is not detected, a read-out integrated circuit (ROIC) and logic circuitry to generate a first image sensed by the first array and a second image sensed by the second array, and gas detection logic to detect the presence of gas in the first image.

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.

公开(公告)号：US20200025679A1

公开(公告)日：2020-01-23

申请号：US16586809

申请日：2019-09-27

Applicant: FLIR Systems AB

Inventor： Hakan E. Nygren ,  Jonas Sandsten ,  Per Lilja ,  Marta Barenthin-Syberg ,  Henning Hagman ,  Eric A. Kurth ,  Brian B. Simolon ,  Naseem Y. Aziz ,  Ulf Wallgren

IPC: G01N21/3504 ,  H04N5/33

Abstract: An IR imaging device includes an optical element receiving infrared radiation from a scene, a filter blocking IR radiation outside of a particular range of wavelengths, an array of sensor pixels to capture an image of the scene based on infrared radiation received through the optical element and filter, the array of sensor pixels comprising a first array of sensor pixels to image gas in within a first spectral bandwidth, and a second array of sensor pixel to sense IR radiation in a second spectral bandwidth where gas is not detected, a read-out integrated circuit (ROIC) and logic circuitry to generate a first image sensed by the first array and a second image sensed by the second array, and gas detection logic to detect the presence of gas in the first image.