The difference between thermal imagers and night vision cameras
1. Effectiveness and effectiveness
1) If you have used a regular night vision device, you will find that the observation feeling of the night vision device is completely different from that of a regular infrared thermal imaging device. This is because a typical night vision instrument observes the target directly through the lens, so the field of view is circular, just like what a telescope lens sees, and the image is green. If the clarity is sufficient, it is possible to identify who the character's target is and see the person's facial features clearly.
2) The infrared night vision thermal imager sees the image on the internal LCD screen, rather than directly seeing the target, so the field of view is square. The imaging of infrared night vision thermal imager will be based on temperature distribution. The higher the temperature, the brighter the brightness. Conversely, the lower the temperature, the darker the color. Its main purpose is to discover targets and identify target categories, such as humans and animals.
2. The influence of lighting factors
1) The second-generation+night vision system is greatly affected by the environment due to its imaging principle. Especially under the influence of light, when the light becomes dim, the observation distance will be shortened. In the case of complete darkness, auxiliary infrared light sources must be used, and the distance of auxiliary infrared light sources is generally only up to 100 meters. At the same time, they also fear strong light, although many traditional night vision devices have strong light protection. But if the ambient brightness changes significantly, it will have a significant impact on the observation.
2) Infrared thermal imaging night vision equipment is not affected by light. Whether it is day or night, rainy, snowy, or foggy, the target object can be clearly observed. It is precisely for this reason that top tier car mounted night vision systems, such as Mercedes Benz and BMW, use infrared thermal imagers.
A nighttime external aiming device with an image intensifier as the core component does not require infrared searchlights to illuminate the target during operation. Instead, it utilizes the light reflected by the target under weak illumination to enhance the visible image that can be felt by the human eye on the fluorescent screen through the image intensifier to observe and aim the target. Infrared night vision instrument is a military night vision instrument that utilizes photoelectric conversion technology. It is divided into two types: active and passive: the former uses infrared searchlights to illuminate targets and receive reflected infrared radiation to form images; The latter does not emit infrared radiation and relies on the target's own infrared radiation to form a "thermal image," hence it is also known as a "thermal imager.".
