Broad range gas illumination and imaging

US11573172B2 · kind B2 · utility

Assignee

• FLIR Systems AB · SE

Inventors

• Tomas Lannestedt · Danderyd, SE
• Ulf Wallgren · Lidingö, SE
• Jonas Sandsten · Lomma, SE

Key dates

• Filing date: Mar 13, 2019
• Grant date: Feb 7, 2023
• Expiry date: Mar 13, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2201/0221
• WIPO field: Measurement
• WIPO sector: Instruments

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.