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"Third-generation night vision devices" refer to night vision devices whose core component—the image intensifier—uses third-generation technology. Its most significant feature is the use of a gallium arsenide photocathode and an ion barrier film, resulting in performance far exceeding that of the previous two generations.

The Image Intensifier Tube is the core component of a night vision device, responsible for converting weak ambient light (such as starlight and moonlight) into a clearly visible image. Its working principle is to convert light signals into electrons via a photocathode. After amplification by a microchannel plate (MCP), the signals are reconverted into an enhanced optical image on a phosphor screen, enabling observation in low-light environments.

The YJ-ENVG-B thermal fusion binocular night vision goggles are compact, lightweight, and portable multifunctional night vision devices. The YJ-ENVG-B thermal fusion binocular integrate multiple functions, including infrared imaging and low-light imaging, providing the observer with rich battlefield information and significantly enhancing field detection and observation capabilities.

Thermal imaging is based on the infrared radiation (thermal radiation) emitted by the object itself for imaging.

Digital Night Vision is a modern alternative to traditional image intensifier tube night vision devices (photomultiplier tubes). Digital night vision device uses digital imaging technology (CMOS/CCD sensor + image processing algorithm) to enhance visibility in low-light environments. Digital night vision device has a wide range of uses, covering multiple fields such as military, law enforcement, security, outdoor activities, industrial detection, wildlife observation, etc. The following is a detailed analysis of its main uses: