Infrared is used in night vision equipment when there is unsatisfactory visible light to see. Night vision devices control through a process involving the conversion of ambient light photons into electrons which are then improved by a chemical and electrical process and then converted back into visible light.Infrared light sources can be used to augment the available ambient light for conversion by night vision devices, increasing in-the-dark visibility without actually using a visible light source.
The use of infrared light and night vision devices should not be confused with thermal imaging which creates images based on differences in plane temperature by detecting infrared radiation (heat) that emanates from objects and their surrounding environment.
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