Infrared Inspection enables seeing the target in different wavelengths than the visible. SWIR inspection enables seeing the sketches or old layer of paint underneath the top layer, hence offers inspection of the art piece without giving any harm to it. It is possible to check the art pieces for being genuine, or for detecting previous sketches, drafts, or a different work.
Plastic is transparent in SWIR spectrum. This property of SWIR wavelength is employed in plastic sorting and inspection by using SWIR inspection of plastic goods. Fluids inside the plastic bottles, such as juice, milk, and detergents, can be monitored for fluid level or amount.
Food inspection utilizes the property of water being opaque in SWIR wavelength. The moisture level or water composition of the inspected produce will appear in SWIR imaging at different levels of darkness, hinting about the freshness or health of the inspected item. Particularly, wavelengths of strongest absorbance for water can be selected to detect the higher water composition and hence inspect bruises, damages under the skin of the produce.
Thermal imaging is explained as detection of radiation emitted from an object with the use of an infrared sensor in SWIR, MWIR or LWIR region of the infrared spectrum. If an object has a temperature higher than absolute zero, it will emit radiation. The detectability of that radiation depends on the type of sensor used, the temperature level and the emissivity of the object being thermally imaged. As temperature level increases, the radiation of the object increases. SWIR cameras are excellent tools, if the object temperature level is above 150°C, for high temperature thermal imaging applications, in many areas like electronics industry, aviation and civil industry.
The infrared imaging solutions are increasing in use along with the more popular microwave, ultrasound and X-ray based imaging technologies. Unlike these popular imaging technologies the infrared imaging is a passive optical detection method which is non-invasive. Therefore there is no emission from the imaging system and no penetration into the skin of the patients.
Infrared imaging is generally used for video surveillance of roadways, traffic density monitoring, speed detection, and automatic number plate recognition (ANPR). Infrared imaging is effective in darkness and under adverse weather conditions, such as direct sunlight, night time headlight glare, reflection off wet surfaces, smoke, fog, and haze.
Active and passive infrared imaging systems are used in darkness and under adverse weather conditions, such as smoke, fog, and haze for enhancement of the driver`s vision and situational awareness. At present, the car manufacturers are offering night vision driver`s enhancement systems as an option.