Thermal imaging camera

Thermal Imaging Camera

A Thermal imaging camera (also known as a Thermographic camera) is a type of thermographic device used to create an image using infrared radiation, similar to a common camera that forms an image using visible light. Instead of the 400–700 nanometre range of the visible light camera, infrared cameras operate in wavelengths as long as 14,000 nm (14 µm).

History

The development of thermal imaging cameras originated from the infrared technology advancements during the World War II. The technology was initially designed for military use, and over time, it was adapted for other applications.

Function

Thermal imaging cameras detect the temperature by recognizing and capturing different levels of infrared light. This light is invisible to the naked eye, but can be felt as heat if the intensity is high enough. The camera has a lens that focuses the infrared light emitted by all of the objects in view. The focused light is scanned by a phased array of infrared-detector elements. The detector elements create a detailed temperature pattern called a thermogram.

Applications

Thermal imaging cameras have a wide range of applications. They are used in firefighting, to see through smoke, find people, and localize the base of a fire. With thermal imaging, pilots can see clearly in fog and detect ice on the wings of their aircraft. Power line maintenance technicians locate overheating joints and parts to eliminate potential failures.

See also

• Infrared
• Thermography
• Infrared photography