The difference between Digital night vision goggles and infrared thermal imager camera

working principle

         1. Working principle of infrared night vision

         The principle of infrared night vision is generally to collect and enhance the existing light through the eyepiece to focus the light on the image intensifier, and then inside the intensifier, a photocathode will be activated by light, so that the photon energy can be converted These electrons are accelerated through an electrostatic area located inside the booster, and then hit the phosphor surface screen, and then form an image visible to the human eye. To put it simply, the principle of night vision is actually to convert the signal from the target invisible light, low light or infrared light into an electrical signal, and then amplify the electrical signal to convert it into an optical signal visible to the human eye. .

         2. Working principle of Digital Night Vision

        Digital Night Vision generally processes and converts this low-illumination light into a digital electrical signal through a high-sensitivity image sensor, and then transmits it to a miniature liquid crystal display inside the night vision device.

            So from the description of the working principle above, it can be seen that the core components of infrared night vision and digital night vision are different. The former generally uses an image intensifier, while the latter uses an image sensor, which is the main difference between the two. .

           The application environment of the two is different

           Infrared night vision can only be used in low light or full black conditions. In the presence of strong light and during the day, it will be limited by the imaging principle, so it cannot be used normally. If it is activated, it needs to be covered with the objective lens cover from the light inlet Viewing in the middle, but even the use of infrared night vision during the day is still not significant, which is not as clear as the naked eye.

           Digital night vision goggles is completely independent of the ambient light. The use mode can be adjusted to day or night mode. It is a day and night all-weather photoelectric instrument. It is color imaging during the day, black and white or green imaging at night.