Thermal imaging cameras, also called infrared cameras, detect radiated heat given off by an object or person. Thermal imaging cameras can also have lenses, like those found on visible light cameras. In the case of thermal cameras, the lens is used to focus waves from the infrared energy emitted by the subject onto an infrared sensor array. Thousands of sensors on the array convert the infrared energy into electrical signals, which create a video image making it easier for the operator to interpret the data. The infrared camera measures and then displays the "thermal" or "infrared" profile of objects in relation to the temperature of surrounding objects.
With some thermal cameras, you can record the data measured by the sensor array onto a portable storage device, such as a microSD card and then import that data into a software application to further the interpretation. The software application we use to do this is FLIR Tools.