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Thermal Imaging

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Thermal Imaging

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Thermal imaging cameras allow for object distinction without the aid of an illumination source, thereby distinguishing it from LiDAR. Thermal imaging is ideal for producing images at night or in the presence of some obscuration, such as light fog, rain, or smoke. For example, forward-looking IR or FLIR cameras are used to provide night vision on military and civilian aircraft or for use in security and surveillance. FLIR cameras usually detect radiation in the mid-wavelength IR (MWIR, 3-5 µm range) and long-wavelength IR (LWIR, 7.5-14 µm range) portions of the electromagnetic spectrum. When coupled with additional cameras that can detect VIS (0.4-0.75 µm range), NIR (0.75-1.1 µm range), or short-wavelength IR (SWIR, 1.1-2.5 µm range) radiation, multispectral imaging is possible (see below). SWIR imaging is becoming increasingly popular in many industrial applications, including the inspection of solar cells, and agricultural products, and for anti-counterfeiting.

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