Night vision on outdoor security cameras is provided by passive infrared (PIR) sensors which measure infrared light radiating from objects in its field of view (Source: Wikipedia). On an outdoor security camera, infrared LED bulbs are located concentrically around the camera lens to detect this infrared radiation (in the form of heat transfer). The number of infrared LEDs used in a camera help determine its range for night vision.
Modified on: Thu, 25 Oct, 2018 at 10:59 AM
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