Flir Systems Ab

Marta Barenthin-Syberg

Henning Hagman

Jonas Sandsten

Tien Nguyen

Hakan E Nygren

Per Lilja

Eric A Kurth

Brian B Simolon

Naseem Y Aziz

Ulf Wallgren

Various techniques are provided for increasing contrast between gas features and other features in a scene. In one example, a method includes receiving a captured image frame comprising a plurality of pixels having a first range of associated pixel values. The method also includes receiving a selection of a subset of the pixels, wherein the subset comprises a gas feature and a scene feature. The method also includes determining a span associated with the pixels of the subset having a second range of associated pixel values smaller than the first range. The method also includes scaling the captured image frame to provide an adjusted image frame limited to the second range of pixel values associated with the span to increase contrast between the gas feature and the scene feature. The method also includes displaying the adjusted image frame. Additional methods and systems are also provided.

Determination of level and span for gas detection systems and methods

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.

Gas imaging systems and methods

Improved techniques for thermal imaging and gas detection are provided. In one example, a system includes a first set of filters configured to pass first filtered infrared radiation comprising a first range of thermal wavelengths associated with a background portion of a scene. The system also includes a second set of filters configured to pass second filtered infrared radiation comprising a second range of thermal wavelengths associated with a gas present in the scene. The first and second ranges are independent of each other. The system also includes a sensor array comprising adjacent infrared sensors configured to separately receive the first and second filtered infrared radiation to capture first and second thermal images respectively corresponding to the background portion and the gas. Additional systems and methods are also provided.

Infrared sensor array with alternating filters

An ambient temperature calibration process includes, in accordance with an embodiment, determining an ambient temperature calibration value for a global external resistance associated with a read out integrated circuit (ROIC) of an image capture component comprising a sensor array comprising a focal plane array of microbolometers arranged on the ROIC; determining an ambient temperature calibration value for a sensor integration time associated with the ROIC; and determining an ambient temperature calibration mapping for an offset mapping associated with the ROIC.

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Stockholm, Sweden

Marta Barenthin-Syberg