What is each used for?
In: Physics
Infrared camera illuminate in front of them with short wave infrared radiation, which bounce back from the surface and enter the camera, making an image.
Thermal camera don’t illuminate anything. See any object emit what we call thermal radiation depending on their temperature. This is why the heating element of your oven glow reddish. Most object around us is low enough in temperature that they emit their thermal radiation in infrared. A thermal camera will detect that radiation and depending on the wavelenght they detect, it can show a gradiant of temperature.
Night Vision transform photon in electron, then multiply the number of electron and transform them back into photon. That way, even if there is very little light, you can see. But that doesn’t work in complete darkness. That said, night vision google often work at the boundary between visible light and infrared, and so they can use the same technics as an infrared camera too. So when it’s too dark for the amplifycation method to work, they just shine an infrared light and can still see.
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