Patents by Inventor Jonas Sandsten
Jonas Sandsten has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230366812Abstract: 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.Type: ApplicationFiled: April 24, 2023Publication date: November 16, 2023Inventors: Hakan E. Nygren, Jonas Sandsten, Per Lilja, Marta Barenthin-Syberg, Henning Hagman, Eric A. Kurth, Brian B. Simolon, Naseem Y. Aziz, Ulf Wallgren
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Publication number: 20230225620Abstract: Various techniques are disclosed to provide for improved detection of elevated human body temperatures. In one example, a method includes receiving a thermal image. The method also includes processing the thermal image to detect a person's face and a characteristic associated with the person. The method also includes selecting a circadian rhythm model associated with the detected characteristic. The method also includes determining an expected body temperature using the circadian rhythm model. The method also includes extracting a temperature associated with the person's face from the thermal image. The method also includes comparing the extracted temperature with the expected body temperature to detect an elevated body temperature condition. Additional methods and systems are also provided.Type: ApplicationFiled: March 15, 2023Publication date: July 20, 2023Inventors: Jonas Sandsten, Nicklas Bahram Ramberg
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Patent number: 11635370Abstract: 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.Type: GrantFiled: September 27, 2019Date of Patent: April 25, 2023Assignee: FLIR Systems ABInventors: Hakan E. Nygren, Jonas Sandsten, Per Lilja, Marta Barenthin-Syberg, Henning Hagman, Eric A. Kurth, Brian B. Simolon, Naseem Y. Aziz, Ulf Wallgren
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Patent number: 11573172Abstract: 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.Type: GrantFiled: March 13, 2019Date of Patent: February 7, 2023Assignee: FLIR Systems ABInventors: Tomas Lannestedt, Ulf Wallgren, Jonas Sandsten
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Patent number: 11474030Abstract: Improved techniques for quantification of detected gases are provided. In one example, a method includes receiving infrared radiation from a scene at a sensor array comprising first and second sets of infrared sensors associated with first and second wavelength ranges of the infrared radiation, respectively. The method also includes capturing first and second images by the first and second sets of infrared sensors, respectively. The method also includes detecting a background object in the first image. The method also includes tracking the background object to identify the background object in the second image. The method also includes updating a radiometric scene map with first and second radiometric values associated with the first and second images and correlated to a location of the background object in the scene. The method also includes performing gas quantification using the radiometric scene map. Additional systems and methods are also provided.Type: GrantFiled: June 24, 2020Date of Patent: October 18, 2022Assignee: FLIR Systems ABInventors: Henrik Viklund, Jonas Sandsten
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Patent number: 11249016Abstract: Systems and methods disclosed herein, in accordance with one or more embodiments provide for imaging gas in a scene, the scene having a background and a possible occurrence of gas. In one embodiment, a method and a system adapted to perform the method includes: controlling a thermal imaging system to capture a gas IR image representing the temperature of a gas and a background IR image representing the temperature of a background based on a predetermined absorption spectrum of the gas, on an estimated gas temperature and on an estimated background temperature; and generating a gas-absorption-path-length image, representing the length of the path of radiation from the background through the gas, based on the gas image and the background IR image. The system and method may include generating a gas visualization image based on the gas-absorption-path-length image to display an output image visualizing a gas occurrence in the scene.Type: GrantFiled: September 16, 2019Date of Patent: February 15, 2022Assignee: FLIR Systems ABInventors: Jonas Sandsten, Jonce Kotaleski, Erik Ekerot
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Patent number: 11200697Abstract: 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.Type: GrantFiled: December 11, 2019Date of Patent: December 14, 2021Assignee: FLIR Systems ABInventors: Jonas Sandsten, Per Lilja, Henning Hagman, Marta Barenthin-Syberg, Tien Nguyen
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Publication number: 20210310941Abstract: Provided are systems and methods to filter infrared spectrum radiation that can be integrated with a compact optical system for an infrared imaging system. The optical system includes an objective lens element configured to receive and transmit infrared (IR) radiation from a scene, where the IR radiation from the scene includes a particular range of wavelengths corresponding to an absorption spectrum or a transmission spectrum of a gas. The optical system also includes a spectral lens element configured to receive the IR radiation transmitted through the objective lens element, where the spectral lens element comprises a first interference filter disposed on a first surface of the spectral lens element. The interference filter is configured to filter the IR radiation transmitted through the objective lens element to a narrower wavelength band that includes the particular range of wavelengths.Type: ApplicationFiled: June 17, 2021Publication date: October 7, 2021Inventors: Jonas Sandsten, Sten Lindau
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Patent number: 11035786Abstract: Improved techniques for infrared imaging and gas detection are provided. In one example, a system includes a sensor array configured to receive infrared radiation from a scene comprising a background portion and a gas. The sensor array includes a first set of infrared sensors configured with a first spectral response corresponding to a first wavelength range of the infrared radiation associated with the background portion. The sensor array also includes a second set of infrared sensors configured with a second spectral response corresponding to a second wavelength range of the infrared radiation associated with the gas. The system also includes a read out integrated circuit (ROIC) configured to provide pixel values for first and second images captured by the first and second sets of infrared sensors, respectively, in response to the received infrared radiation. Additional systems and methods are also provided.Type: GrantFiled: June 18, 2020Date of Patent: June 15, 2021Assignee: FLIR Systems ABInventors: Hakan E. Nygren, Eric A. Kurth, Jonas Sandsten
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Publication number: 20200326276Abstract: Improved techniques for quantification of detected gases are provided. In one example, a method includes receiving infrared radiation from a scene at a sensor array comprising first and second sets of infrared sensors associated with first and second wavelength ranges of the infrared radiation, respectively. The method also includes capturing first and second images by the first and second sets of infrared sensors, respectively. The method also includes detecting a background object in the first image. The method also includes tracking the background object to identify the background object in the second image. The method also includes updating a radiometric scene map with first and second radiometric values associated with the first and second images and correlated to a location of the background object in the scene. The method also includes performing gas quantification using the radiometric scene map. Additional systems and methods are also provided.Type: ApplicationFiled: June 24, 2020Publication date: October 15, 2020Inventors: Henrik Viklund, Jonas Sandsten
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Publication number: 20200319097Abstract: Improved techniques for infrared imaging and gas detection are provided. In one example, a system includes a sensor array configured to receive infrared radiation from a scene comprising a background portion and a gas. The sensor array includes a first set of infrared sensors configured with a first spectral response corresponding to a first wavelength range of the infrared radiation associated with the background portion. The sensor array also includes a second set of infrared sensors configured with a second spectral response corresponding to a second wavelength range of the infrared radiation associated with the gas. The system also includes a read out integrated circuit (ROIC) configured to provide pixel values for first and second images captured by the first and second sets of infrared sensors, respectively, in response to the received infrared radiation. Additional systems and methods are also provided.Type: ApplicationFiled: June 18, 2020Publication date: October 8, 2020Inventors: Hakan E. Nygren, Eric A. Kurth, Jonas Sandsten
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Publication number: 20200202569Abstract: 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.Type: ApplicationFiled: December 11, 2019Publication date: June 25, 2020Inventors: Jonas Sandsten, Per Lilja, Henning Hagman, Marta Barenthin-Syberg, Tien Nguyen
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Patent number: 10612975Abstract: Systems and methods disclosed herein provide for gas imaging. A gas imaging system comprises a lenslet array configured to receive thermal radiation from a scene and transmit a plurality of substantially identical sub-images of the thermal radiation; a birefringent polarization interferometer configured to generate an optical path difference for each ray of the plurality of sub-images based on a respective position of each ray entering the BPI, the optical path differences combining to form an interference fringe pattern; and an infrared focal plane array configured to capture a thermal image of the plurality of sub-images modulated by the interference fringe pattern due to the optical path differences through the BPI. The captured thermal image may represent a plurality of interferogram sample points of the thermal radiation from the scene, and may be used to construct a plurality of hyperspectral images of the thermal radiation from the scene.Type: GrantFiled: December 6, 2017Date of Patent: April 7, 2020Assignee: FLIR SYSTEMS ABInventors: Jonas Sandsten, Joakim Sjunnebo
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Publication number: 20200025679Abstract: 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.Type: ApplicationFiled: September 27, 2019Publication date: January 23, 2020Inventors: Hakan E. Nygren, Jonas Sandsten, Per Lilja, Marta Barenthin-Syberg, Henning Hagman, Eric A. Kurth, Brian B. Simolon, Naseem Y. Aziz, Ulf Wallgren
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Publication number: 20200011789Abstract: Systems and methods disclosed herein, in accordance with one or more embodiments provide for imaging gas in a scene, the scene having a background and a possible occurrence of gas. In one embodiment, a method and a system adapted to perform the method includes: controlling a thermal imaging system to capture a gas IR image representing the temperature of a gas and a background IR image representing the temperature of a background based on a predetermined absorption spectrum of the gas, on an estimated gas temperature and on an estimated background temperature; and generating a gas-absorption-path-length image, representing the length of the path of radiation from the background through the gas, based on the gas image and the background IR image. The system and method may include generating a gas visualization image based on the gas-absorption-path-length image to display an output image visualizing a gas occurrence in the scene.Type: ApplicationFiled: September 16, 2019Publication date: January 9, 2020Inventors: Jonas Sandsten, Jonce Kotaleski, Erik Ekerot
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Patent number: 10422741Abstract: Systems and methods disclosed herein, in accordance with one or more embodiments provide for imaging gas in a scene, the scene having a background and a possible occurrence of gas. In one embodiment, a method and a system adapted to perform the method includes: controlling a thermal imaging system to capture a gas IR image representing the temperature of a gas and a background IR image representing the temperature of a background based on a predetermined absorption spectrum of the gas, on an estimated gas temperature and on an estimated background temperature; and generating a gas-absorption-path-length image, representing the length of the path of radiation from the background through the gas, based on the gas image and the background IR image. The system and method may include generating a gas visualization image based on the gas-absorption-path-length image to display an output image visualizing a gas occurrence in the scene.Type: GrantFiled: August 31, 2017Date of Patent: September 24, 2019Assignee: FLIR Systems ABInventors: Jonas Sandsten, Erik Ekerot
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Patent number: 10416076Abstract: A method and a system to quantify gas in a thermal imaging device, said method comprising obtaining a gas-absorption-path-length image as a scene difference infrared image based on a gas infrared image and a scene background infrared image substantially depicting the same scene and generating a quantified scene difference infrared image based on said scene difference infrared image and a predefined gas-quantifying relation.Type: GrantFiled: August 31, 2017Date of Patent: September 17, 2019Assignee: FLIR SYSTEMS ABInventors: Jonas Sandsten, Jonce Kotaleski, Erik Ekerot
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Publication number: 20190212261Abstract: 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.Type: ApplicationFiled: March 13, 2019Publication date: July 11, 2019Inventors: Tomas Lannestedt, Ulf Wallgren, Jonas Sandsten
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Publication number: 20180106674Abstract: Systems and methods disclosed herein provide for gas imaging. A gas imaging system comprises a lenslet array configured to receive thermal radiation from a scene and transmit a plurality of substantially identical sub-images of the thermal radiation; a birefringent polarization interferometer configured to generate an optical path difference for each ray of the plurality of sub-images based on a respective position of each ray entering the BPI, the optical path differences combining to form an interference fringe pattern; and an infrared focal plane array configured to capture a thermal image of the plurality of sub-images modulated by the interference fringe pattern due to the optical path differences through the BPI. The captured thermal image may represent a plurality of interferogram sample points of the thermal radiation from the scene, and may be used to construct a plurality of hyperspectral images of the thermal radiation from the scene.Type: ApplicationFiled: December 6, 2017Publication date: April 19, 2018Inventors: Jonas Sandsten, Joakim Sjunnebo
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Publication number: 20180011009Abstract: Systems and methods disclosed herein, in accordance with one or more embodiments provide for imaging gas in a scene, the scene having a background and a possible occurrence of gas. In one embodiment, a method and a system adapted to perform the method includes: controlling a thermal imaging system to capture a gas IR image representing the temperature of a gas and a background IR image representing the temperature of a background based on a predetermined absorption spectrum of the gas, on an estimated gas temperature and on an estimated background temperature; and generating a gas-absorption-path-length image, representing the length of the path of radiation from the background through the gas, based on the gas image and the background IR image. The system and method may include generating a gas visualization image based on the gas-absorption-path-length image to display an output image visualizing a gas occurrence in the scene.Type: ApplicationFiled: August 31, 2017Publication date: January 11, 2018Inventors: Jonas Sandsten, Erik Ekerot