Thermal imaging cameras allow objects with any heat signature to be seen in total darkness, through fog, smoke or other adverse conditions. Thermal Imaging Cameras were first deployed for military applications as early as the mid 1050’s. early systems were originally cooled using liquid nitrogen which made them extremely expensive and the technology was classified for military applications only.
By the 1970’s the US military had decided to embark on a strategy to equip each soldier with personal thermal imaging equipment. – This lead to the creation of the first un-cooled (without liquid nitrogen) Thermal Imaging Detectors which were both smaller and far less expensive.
With the creation of the uncooled engines came military declassification which lead to the adoption of thermal imaging technology in an array of markets such as law enforcement, search and rescue and maritime.
Infra red radiation from specific wavelengths passes through the lens onto an element known as a microbolometer.