LWIR imaging can detect thermal radiation at long distances, in total darkness, and through fog, dust, rain, and smog, which can be used in monitor, security, and rescue. Industrial applications of LWIR imaging include non-destructive and process inspection. Recently LWIR imaging has also been used in fever screening during COVID-19.
NIR imaging can show non-surface features such as mechanical damage, insect infestation, and food decay in fruits, vegetables, nuts, meat, etc. NIR can also penetrate certain dyes and inks to inspect products through printed packaging. NIR imaging is also used in wood, textile paper, glass, tile, and electronics industries, which can inspect labels on cylindrical items(such as cans, bottles, pens, etc.), even in rotating objects.
Comparative Images Showing the Same Welding Process in
Visible (Left) and in SWIR Using SWIR Camera (Right).SWIR imaging can detect non-surface semiconductors and solar cells, including the detection of impurities in semiconductor ingots and cracks in polycrystalline materials. SWIR imaging can also measure temperatures between 250°C and 800 °C, can be used in hot glass materials inspection of manufacturing and welding applications.
UV imaging detects scratches and defects on polished or highly specular surfaces. It is extremely useful for surface small details detection of printed circuit boards, documents, and credit cards.
Line scan imaging is used to inspect continuous materials and image objects on a conveyor belt, especially for imaging 3D objects or randomly moving products in different lengths.