How does night vision on a camera work ?

Answer 1

When light strikes an object, its atoms react and emit a very low frequency infrared wavelength, more similar to heat than to visible light. Night Vision Security Cameras are extremely sensitive to these thermal-infrared emissions and amplify them, converting the measurement of the invisible wavelength into an image on your monitor. This type of Night Vision is known as Thermal Imaging. While Thermal Imaging is great for detecting people or motion in near absolute darkness, most of the cameras sold here use a more practical kind of Night Vision known as Image Enhancement or Image Intensification. These devices contain a lens that senses light at a slightly higher frequency than thermal-infrared, anywhere from the more reflective infrared wavelengths to the barely visible red wavelengths. The light's photons are converted to electrons and amplified through a component called the photocathode. The electrons are then converted back into photons to produce a strong visible image on your camera's phosphor screen.

Answer 2

When you ckick on night mode


It depends on the kind of the camera you are using

Answer 3

The mechanism enhances ambient light from different sources to including heat fromthe subject you are focusing on.

Answer 4

infra red