Difference between night vision device and thermal imager
1. Effectiveness
1) If you have used ordinary night vision devices, you will find that the observation feeling of night vision devices and ordinary infrared thermal imagers is completely different. This is because the general night vision device directly observes the target through the lens, so the field of view seen is the same as that seen by the telescope lens, which is circular and the picture is green. If the clarity is enough, it is possible to identify who the target of the character is and to see the facial features of the person clearly.
2) The infrared night vision thermal imager sees the image on the internal LCD screen instead of directly seeing the target, so the field of view is square. The imaging of the infrared night vision thermal imager will be based on the temperature distribution. The higher the temperature, the brighter the brightness. On the contrary, the lower the temperature, the darker the color. The main purpose is to find the target and identify the target category, such as the target is a person, an animal, etc.
2. The influence of light factors
1) The second-generation + night vision device is greatly affected by the environment due to the imaging principle. Especially under the influence of light, when the light is dimmed, the observation distance will be shortened. In the case of total darkness, the auxiliary infrared light source must be used, and the distance of the auxiliary infrared light source is generally only up to 100 meters. At the same time, they will also be afraid of strong light, although many traditional night vision devices have strong light protection. However, if the ambient brightness changes greatly, it will have a great impact on the observation.
2) Infrared thermal imaging night vision device will not be affected by light. Whether it is day or night or rainy, snowy or foggy days, the target object can be clearly observed. It is for this reason that top car night vision devices, such as Mercedes-Benz and BMW, use infrared thermal imagers.
thermal imager
Infrared thermal imaging technology has applications in both military and civilian areas. It originated from military use and gradually turned to civilian use. It is generally called a thermal imager in civilian use, and it is mainly used in research and development or industrial inspection and equipment maintenance, and is also widely used in fire prevention, night vision and security. In layman's terms, a thermal imager converts the invisible infrared energy emitted by an object into a visible thermal image. Different colors on the top of the thermal image represent different temperatures of the measured object.
night vision device
The night-time external sight with the image intensifier as the core device does not use infrared searchlights to illuminate the target when it works, but uses the light reflected by the target under weak light to be enhanced into a visible image that the human eye can perceive on the fluorescent screen through the image intensifier to observe and aim. Target. Infrared night vision device is a military night vision device using photoelectric conversion technology. It is divided into two types: active and passive: the former uses infrared searchlights to irradiate the target, and receives reflected infrared radiation to form an image; the latter does not emit infrared rays, but relies on the target's own infrared radiation to form a "thermal image", so it is also called "thermal image". instrument".
