Do you know the difference between low light level night vision and infrared thermal imaging?

2019-06-17

The night vision products we often encounter on the market, mainly low-light night vision products and infrared thermal imaging products, then do you know the difference?

Low light imaging technology

Low-light night vision technology, also known as image enhancement technology, is an optoelectronic imaging technology that enhances the weak target image illuminated by night light through a night vision goggle with an image intensifier tube for observation. Low-light technology is an important part of photovoltaic high-tech. In the low-light night vision products, the image intensifier is the core device. The image intensifier is used to enhance the natural light in the night sky, such as moonlight, starlight, and atmospheric gray light, hundreds of times and tens of thousands of times to enable the human eye to carry out long distances. The extent of observation. Yellow-green light is the most sensitive wavelength of the human eye, so fluorescent screens of this color are often applied to the imager. When we watched special forces in film and television for night vision imaging, the picture in the night vision lens showed yellow-green for this reason.

Infrared thermal imaging technology

Infrared thermal night vision technology is divided into active infrared night vision technology and passive infrared night vision technology. The active infrared thermal night vision technology is a night vision technology that performs observation by actively illuminating and utilizing the infrared light of the target reflection infrared source, and the corresponding equipment is an active infrared night vision apparatus. Passive infrared night vision technology is an infrared technology that realizes observation by means of infrared radiation emitted by the target itself. It finds the target according to the temperature difference or heat radiation difference between the target and the background or parts of the target. It is equipped with a thermal imager. At present, the surveillance cameras are equipped with active infrared systems, and there are few applications for passive infrared systems.

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