Generally speaking, the use of night vision equipment includes: military, law enforcement, hunting, field observation, surveillance, safety, navigation, hidden target observation, entertainment and so on. Night vision equipment was first used to locate enemy targets at night. At present, the night vision system is still widely used in the military system. Besides the above purposes, it also includes navigation, surveillance, aiming and other purposes. Police and security departments often use the two technologies of thermal imaging and image enhancement, especially for monitoring them. Hunters and lovers of nature depend on NVD to ride through the forest at night. Night vision application (2) Detectives
NVD has a history of more than 40 years. These products can be divided into several generations. Every major breakthrough in the development of NVD technology will spawn a new generation of products. The earliest generation, the earliest night vision system, developed by the US military, was applied to the Second World War and the Korean War, and these NVD systems used active infrared technology. This means that a transmitter unit called the infrared radiation source must be attached to the NVD. The unit can emit a bunch of near infrared rays, similar to those emitted by ordinary flash lamps. This beam can not be seen by the naked eye. They will reflect from the object and return to the lens of NVD.
CCD(Charge Coupled Device)，"charge coupled device", in millions of pixels. The number of megapixels in the specifications of the digital camera refers to the resolution of CCD. CCD is a photosensitive semiconductor chip used for capturing graphics, widely used in scanners, photocopiers, and film free cameras. Similar to the principle of film, light passes through a lens to project graphic information onto CCD. But different from the film
When it comes to night vision, most people think of image enhancement technology. In fact, image enhancement system is generally called night vision equipment (NVD). There is an image intensifier tube in NVD, which can be used to collect and amplify infrared and visible light. Here's how the image enhancement system works: a traditional lens called an objective lens can capture ambient light and some near-infrared rays. The collected light is transmitted to the image enhancement tube. In most NVD, the power supply system of image intensifier will get power from two N-Cell or "AA" batteries. The pipeline will output about 5000 volts to the image tube assembly. Image enhancement tube