Principles and Characteristics of Low-Light Level Night Vision Devices
Principle: The instrument utilizes natural light such as low brightness night sky, stars, moonlight, and atmospheric glow reflected by nighttime targets to enhance and magnify it to hundreds of thousands of times, thereby achieving suitability for reconnaissance, observation, aiming, vehicle driving, and other battlefield operations with the naked eye at night.
Characteristics: As low light night vision devices work in a passive manner using night sky light, they can better conceal themselves and are suitable for departments engaged in special work such as , criminal investigation, drug control, privacy control, night monitoring, and security applications.
The low light night vision device has now developed into three generations, with the first generation being a three-level cascade low light night vision device (composed of three 0-generation phototubes connected in series). The second generation is microchannel plate type low light night vision device, and the third generation is | | | - V negative electron affinity photocathode image intensifier low light night vision device. During the transition from the first generation to the third generation, a super second generation photoelectric cell called the second generation addition was developed, which has technical performance second only to the third generation products. If classified in detail, low light night vision devices are divided into five levels: Generation 0, Generation 1, Generation 2, Generation 2+, and Generation 3. The development of low light night vision devices has become relatively mature in technology, with good imaging quality and low cost. Therefore, for a considerable period of time in the future, they will still be a major equipment in the world's night vision equipment. The second and third generation products have the characteristics of small size, light weight, clear images, comprehensive functions, and practicality. It is an essential equipment for night work in safety, public security, armed police, customs, petroleum industry, news gathering, tourism, aquaculture, nature enthusiasts, and other industries. However, due to its core component, the low light image intensifier, being a high-tech product, the process is particularly complex, the cost is high, and the price is relatively high. But in terms of performance price ratio, it is still quite good.
