What technology enhances night vision in CCTV systems?

Infrared illumination is the technology that enhances night vision in CCTV systems. It works by emitting infrared light, which is invisible to the naked eye but can be detected by specialized cameras equipped with infrared sensors. This allows the cameras to capture clear images in low-light or complete darkness, significantly improving their surveillance capabilities during nighttime or in poorly lit environments.

While wide-angle lenses, high-definition resolution, and digital zoom functions each have their unique benefits in terms of field of view, image clarity, and magnification, respectively, they do not specifically enhance night vision. Wide-angle lenses help to cover a larger area, high-definition resolution improves overall image quality, and digital zoom functions allow for closer inspection of subjects, but none of these technologies enables the camera to effectively capture images in the dark without the use of added light sources like infrared illumination.