The most common type that s used on most security cameras is infrared ir night vision which relies on infrared light.
Infrared lights for night vision cameras.
These leds essentially become a spotlight for your camera.
Infrared night vision bathes the area in light that s invisible to our eyes.
Active infrared night vision combines infrared illumination of spectral range 700 1 000 nm just below the visible spectrum of the human eye with ccd cameras sensitive to this light.
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Because infrared isn t visible to the human eye you don t even notice and your camera can use that ir light to record video at night.
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It is made possible by two approaches.
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Night vision also refers to the natural ability to see or live in the dark.
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Night vision refers to the technology that enables humans to see objects or scenes in low light conditions.
Night vision and infrared.
While this is a magnificent feature to have in a camera we live in an imperfect world and like everything else it s not always what we d like it to be.
For example mirrors windows and objects made of glass.
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Just like with the visible light in the section above that surface reflecting the ir light back at the camera doesn t even have to be in view of the lens and image sensor to.
The resulting scene which is apparently dark to a human observer appears as a monochrome image on a normal display device.
Sufficient intensity range and sufficient spectral range.
Security cameras night vision can get blurry due to reflective objects in the camera field of view.
Unlike true night vision infrared leds emit their own source of light instead of using existing sources.
One that most security cameras use and one that night vision goggles use.
There are a couple different types of night vision.
One common cause is the infrared light from the camera s built in ir leds reflecting off of a nearby surface like the wall or soffit around where the camera is mounted.