Why is infrared (IR) illumination used?
Almost all license plates have a coating that is highly reflective to IR, and therefore will be easily identified by the camera. Additional benefits of IR include the fact that there is not dependant upon the presence of visible light…allowing for excellent performance in bright sunlight, total darkness, and most adverse weather conditions.
Infrared Illuminators are used for remote control and also used for viewing in the dark. IR illuminators are used for illumination. For more information about IR uses in security purposes. http://remenovsongallie.wordpress.com/2013/02/09/make-your-surveillance-system-best-with-infrared-illuminators/
Simple Day/Night cameras are used yo capture images and videos suring the day as well as the night. If IR illuminators are added to such cameras, they help the cameras to produce better and brighter images during night time.
