Difference between thermal and night vision cameras
1, the effectiveness of the effect
(1) If you have used ordinary night vision devices, you will find that the night vision device and the general thermal imaging camera, observation feel completely different. This is because, the general night vision device is through the lens directly observe the target, so see the field of view and telescope lens to see the same, is round, and the screen is green. If the clarity of the case is enough, is able to identify the figure who the target is, can see the five human features.
(2) infrared night vision thermal imager to see the internal LCD screen on the imaging, rather than directly see the target, so see the field of view are square. Infrared night vision thermal imager imaging will be distributed according to the temperature, the higher the temperature the greater the brightness, and vice versa, the lower the temperature is dark, the main purpose is to find the target, identify the target category, such as the target is a person, animals, etc..
2,The influence of light factor
(1) the second generation + night vision device, due to the imaging principle, by the environmental impact is relatively large. Especially the influence of light, after the light becomes dark, the observation distance will be shortened. In the case of total darkness must resort to auxiliary infrared light source, and auxiliary infrared light source distance is generally only up to 100 metres. It will also be afraid of strong light, although many traditional night vision devices have strong light protection. But if the environmental brightness varies greatly, it will have a great impact on the observation.
2) Infrared thermal imaging night vision device, will not be affected by the light. Regardless of day and night or rain, snow, fog can clearly observe the target object. It is for this reason that the top car night vision devices, such as Mercedes-Benz BMW are using infrared thermal imaging cameras.
Thermal imaging camera
Thermal imaging technology has been used in both military and civilian applications, originating in the military in the beginning and gradually being converted to civilian use. In civilian use it is generally called thermal imaging camera, mainly used in research and development or industrial testing and equipment maintenance, in fire prevention, night vision and security are also widely used. In layman's terms a thermal imaging camera converts the invisible infrared energy emitted by an object into a visible thermal image. The different colours on the top of the thermal image represent the different temperatures of the object being measured.
Night Vision Cameras
Image intensifier as the core device of the night outside the sights, its work without infrared searchlight illumination of the target, but the use of weak light under the target of the reflected light through the image intensifier on the fluorescent screen enhanced for the human eye can feel the visible image to observe and aim at the target. Infrared night vision device is the use of photoelectric conversion technology of military night vision device. It is divided into active and passive two kinds: the former with infrared searchlight irradiation target, receive the reflected infrared radiation to form an image; the latter does not emit infrared, relying on the target's own infrared radiation to form a "thermal image", so it is also known as the "thermal imaging camera".
