• Image Intensification – makes the image brighter by multiplying the number of photons from the light source. The amplification process has three powered screens, the last of which is green. That gives this night vision its recognizable glow, and is the classic version of the tech.
• Thermal Imaging – a camera and a live display show otherwise-invisible infra red light that reveals relative heat. It can be used to detect living creatures (or people) in any lighting, or lack thereof. We list thermal cameras separately.
• Fusion night vision – by overlaying a thermal image onto an intensified one, it is possible to create a fusion – or hybrid – night vision.
• Active infrared night vision – this kind of night vision is relatively inexpensive and often used in security cameras too. An IR light, invisible to human eyes, is placed near the lens to illuminate subjects.