How does a night vision camera work?

A night vision camera is a device that allows you to see in the dark. But how is that possible? It’s very simple. The light that you are able to see is electromagnetic radiation. You are only able to see a very small part of the electromagnetic spectrum.

That part that you are able to see is called “Visible Spectrum”. There are many types of radiation as you can see in the image above (image source is Wikipedia) but part of it is the infrared radiation. Infrared is a very low energetic radiation and it is widely used in night vision cameras.

Basically the concept is simple – A night vision camera is a device that emits infrared “light” and is capable of detecting it in a camera. The only difference between a night vision camera and a camera that is taking a film of an environment that is being lighted by a normal lamp is that you can’t see the infrared “light” with your eyes but you can with your infrared camera. This provides you the chance to see in the dark.

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