Security Cameras 101 -- Info Guide to Security Cams, CCTV & Video Surveillance

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Infrared Camera

Infrared cameras, also called night-vision cameras, use an infrared light source near the camera lens to illuminate the area with infrared light, which people cannot see. This allows the infrared camera to see in conditions with no light at all, such as inside dark offices at night. With just a slight amount of normal light, an infrared camera can take a picture that looks as good as that in daytime. Most infrared cameras take pictures in black-and-white.

One problem that infrared security cameras can experience when placed in outdoor housings is light reflection from the front glass cover of the housing. By placing the camera lens flush with the housing, this problem can be minimized.

Some people confuse infrared cameras with day-night cameras but they are not the same. The latter do not use infrared illumination for their operation. For more info, see day-night cameras.

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