To buy night vision goggles, choose according to the following order:

1. Intensifier tube: It is several generations. Be sure to check with the seller when buying. Because the night vision device packaging and instructions are generally not marked with several generations of imaging tubes. 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 as several generations of image-enhancing tubes, so as not to infringe your rights. ’

2. Lens: Look at the lens diameter and magnification. Without considering the volume, of course, the bigger the better. In the case of the same intensifier tube, in principle, the larger the aperture, the farther the observation distance, and the clearer the image.

3. Image enhancement technology: Generally, night vision devices with this technology will have better image brightness and clearer under the same conditions.

4. Infrared transmitter: 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, there are different opinions. In fact, there is no reference. Generally speaking: the distance of the 1st generation is 100-250 meters, the distance of the 2nd generation is 200-350 meters, and the distance of the 3rd generation is 300-500 meters, and the object can be seen clearly. It is also determined by the quality of the lens, image processing technology, infrared transmitter, and resolution.