It is the ability to see in low-light conditions. Whether by biological or technological means, night vision is made possible by a combination of two approaches: sufficient spectral range, and sufficient intensity range.
With the proper night-vision equipment, anyone can see a person standing over 200 yards (183 m) away on a moonless, cloudy night. Night vision can work in two very different ways, depending on the technology used.
Image & enhancement – This works by collecting the tiny amounts of light, including the lower portion of the infrared light spectrum, that are present but may be imperceptible to our eyes, and amplifying it to the point that we can easily observe the image.
Thermal imaging Process – This technology operates by capturing the upper portion of the infrared light spectrum, which is emitted as heat by objects instead of simply reflected as light. Hotter objects, such as warm bodies, emit more of this light than cooler objects like trees or buildings.
Night vision is technology that provides users with some vision in total darkness and improved vision in low-light environments.
Applications of Night vision is technology
- Night driving or flying
- night security and surveillance
- wildlife observation
- sleep lab monitoring
- Night vision is often used by the military and also has recreational purposes, like use on home video cameras or during night hiking.