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Monday, April 8, 2013

Infrared Camera

By Roger Frost


The type of light is basically divided into two categories for the purpose of thermal imaging, visible light and invisible light. There is an almost infinite range of light beyond human range of vision. Light, as described in physics, is an electromagnetic wave that propagates through space at a fixed speed. This wave is further identified by its wave length, frequency and energy.

When viewed through a thermal imaging camera, thermal anolomies such as moisture behind walls or under a roofing membrane, missing insulation or air infiltration, electrical anomalies and mechanical deficiencies in machinery are displayed on the thermal imaging camera screen. The thermal imaging camera is also used on energy audits to assess a homes heat loss when used in conjunction with blower door.

The cost of infrared cameras has dropped significantly from the days when only the military was able to afford this expensive technology. Today most home inspectors and insulation companies own at least one thermal imaging camera. The size of thermal imaging cameras has decreased to such that many uses are being found for these cameras than for what they were originally designed for.

Thermal Imaging is now being used by the military on helicopters, destroyers, tanks and on hand held equipment. The ability of thermal imaging devices to see through smoke, fog and darkness has made this a valuable tool for the military. This technology is being used for both its offensive and defensive capabilities by the military.

This is the most common type of thermal-imaging device in use today is the un-cooled type of unit. The infrared-detector elements are contained in a unit that operates at room temperature. This type of system is completely quiet, activates immediately and has the battery built right in. There are hand held units available now which are not much bigger than a flashlight.

Most modern fire departments have embraced thermal imaging cameras for use on fire grounds to aid in finding trapped victims and finding hidden fires. This enables firefighters to be more efficient and speeds up fire ground operations.




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