What are the key points for purchasing infrared night vision devices?
To purchase night vision devices, choose according to the following order:
1. Image enhancer tube: several generations. Be sure to confirm with the merchant when buying. Because the packaging and manuals of night vision devices generally do not indicate which generations of image-increasing tubes are used. Of course, if you want to buy a 2nd or 3rd generation night vision device, it is best to buy a night vision device that is clearly marked with several generations of image enhancer tubes, so as not to infringe on your rights and interests. Currently on the market, such as the night vision device of Russia RHO, it is marked on the product packaging and the machine which generation of image intensifier tube is used.
2. Lens: Look at the lens caliber and magnification. Without considering the size, of course, the bigger the better. In the same case of the image intensifying tube, the principle is that the larger the aperture, the farther the observation distance is, and the clearer the image will be.
3. Image enhancement technology: Generally, night vision devices with this technology will have better image brightness and clearer under the same conditions.
4. Infrared emitter: The quality of this performance also directly affects the image quality.
5. Resolution: The resolution of the lens is very important, the higher the resolution, the clearer the displayed image.
As for the nominal observation distance of the night vision device, the identification distance. Since there is no formal standard, different opinions vary. In fact, there is no reference significance. Generally speaking: the distance of the first generation is 100-250 meters, the distance of the second generation is 200-350 meters, and the distance of the third generation is 300-500 meters, which can see objects clearly. It is determined by the quality of the lens, image processing technology, infrared emitter, and resolution.
