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.
Infrared lights for night vision cameras.
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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.
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One or more ir leds blast out as much light as possible acting as a floodlight.
It is made possible by two approaches.
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.
The resulting scene which is apparently dark to a human observer appears as a monochrome image on a normal display device.
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Night vision also refers to the natural ability to see or live in the dark.
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.
For example mirrors windows and objects made of glass.
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Night vision on most wi fi cameras uses a relatively simple trick of physics.
Security cameras night vision can get blurry due to reflective objects in the camera field of view.
There are a couple different types of night vision.
These leds essentially become a spotlight for your camera.
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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.
The light coming from infrared leds in the camera gets reflected back to the camera which causes noise and blur in the night view.
Night vision and infrared.
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.