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THERMAL IMAGING


sales was attributed by Flir’s president and CEO, Jim Cannon, to ‘increased demand for our thermal cameras for use in elevated skin temperature screening’, which has ‘offset other headwinds to our business resulting from the pandemic’. Revenue for Flir’s industrial


segment for the quarter was $276.4m, up 1.9 per cent. Tis was put down to heightened demand for cameras for elevated skin temperature screening, partially offset by lower volume in maritime products, security products and cooled cameras and components. Demand for thermal


imaging has grown during the coronavirus pandemic thanks to the technology’s ability to detect


www.imveurope.com | @imveurope


‘[A thermal] camera for elevated body temperature screening is still a valuable tool, as long as you understand the variables involved’


an elevated skin temperature, although it should be noted this is not a test for Covid-19, or for that matter even a test for fever – you need a thermometer to say if someone is feverish. However, airports have


installed thermal cameras to


screen passengers for signs of fever, and now, as countries begin easing lockdown restrictions, many other businesses, along with buildings like hospitals, could consider installing thermal imaging checks. So, does the technology work?


Termal imaging was used to screen people in airports during the SARS outbreak in 2003 and swine flu in 2009. Te technique can give a reasonable approximation of core body temperature by focusing on the tear ducts around the eyes, which has shown to be the area on the face most closely correlated with body temperature. However, as Markus


Tarin, president and CEO of MoviTerm in the USA, said in a


The best way to get an accurate reading is to scan people one at a time in an airport security- style check


video for MoviTerm’s YouTube channel, a thermal camera can only detect skin surface temperature – it can’t diagnose whether someone has a fever or an infection of any kind. In addition, it’s only really by focusing on the tear ducts that a thermal camera can give an accurate reading; measuring skin surface temperature elsewhere on the face won’t work. Tarin puts the accuracy of


most thermal cameras as ±2ºC, considering various factors such as emissivity, spatial resolution, detector and system noise, and temperature drift. He also makes clear in the video that


g JUNE/JULY 2020 IMAGING AND MACHINE VISION EUROPE 13


Flir Systems


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