Thermal imaging cameras are also known as thermo graphic cameras or infrared cameras. It is basically used where there is no light or you can say at night. They are very useful in military enforcement services. They help the soldiers to capture the images at night or in bad weather. This device forms an image using infrared radiations similar to a common camera that forms an image using visible light. These thermal imaging cameras operate in wavelengths as long as 14,000nm (14µm).