1. Infrared night vision device

The principle of infrared night vision is to collect and enhance the existing light by focusing the light on the image intensifier through the eyepiece. Inside the intensifier, a photocathode is "activated" by the light and converts the photon energy into electrons. An electrostatic region inside the booster is accelerated and hits the phosphor-surface screen (like a green TV screen), forming an image visible to the human eye. In simple terms, the principle of night vision is to convert the invisible light (low light or infrared light) signal from the target into an electrical signal, and then amplify the electrical signal and convert the electrical signal into a visible light signal to the human eye.

2. Digital night vision device

Digital night vision device is also called digital night vision device, its English name is Digital Night Vision. Most digital night vision devices process and convert the low-illumination light into digital electrical signals through a high-sensitivity CCD (CMOS) image sensor, and then transmit it to the tiny liquid crystal display inside the night vision device.

It can be seen from the description of the working principle above that the core components of infrared night vision devices and digital night vision devices are different. The former uses an image intensifier (image intensifier tube), and the latter uses a CCD (CMOS) image sensor. It is the main difference between the two, and it is also the root cause of other differences. As the basic performance requirements of digital night vision device, the main difference is the clarity and quality of photo and video. The clarity of the camera and video is actually directly related to the performance of the image sensor of the digital night vision device. For example, the image sensor of the second-generation digital night vision device is CMOS-640X480, and the video shooting resolution is 640X480. The higher the level of the digital night vision device, the higher the resolution of the picture and video resolution.

3. Thermal imager

The thermal imager uses an infrared detector and an optical imaging objective to receive the infrared radiation energy distribution pattern of the measured target and reflect it on the photosensitive element of the infrared detector to obtain an infrared thermal image, which is related to the thermal distribution on the surface of the object. field corresponds. In layman's terms, a thermal imager converts invisible infrared energy emitted by an object into a visible thermal image. The different colors on the top of the thermal image represent the different temperatures of the object being measured.