When many people ponder about night vision goggles, the images of spy films usually come to mind. With many things in spy films being completely hocus pocus, many people also believe that night vision is one of these myths. But really, they actually work! With the proper equipment, you really can see people up to 200 yards away on a cloudy dark night. Night vision technology generally follows concepts of two trends. These two trends are thermal imaging, and image enhancement.
Thermal Imaging simply works by capturing the upper portion on an infrared spectrum. What this means is that heat is omitted and turned into light when viewing into the night vision goggle. Therefore, you can see where heat is, and where heat is not. This makes our warm human bodies stand out from cold trees. Thermal imaging is great for nocturnal animal lovers. This technology allows the viewer to see nocturnal animals in their natural habitat, which when considering the dark nights, is a rarity.
Image enhancement works in a very different way that thermal imagery. It basically works by collecting tiny fragments of light and digitally enhancing and amplifying them. Light is captured into an image enhancing telescope with the traditional objective lens. However, as with a normal telescope where the light would travel untreated, an image enhancing telescope intensifies the light with electrical power. Simply put, light that normally would not be perceived by our naked human eye is amplified, allowing us to see in extremely low-light situations.