How to choose and buy night vision device
1. Image booster tube: This directly determines the level of the night vision device purchased. It is divided according to the grade of the image enhancing tube, from 1st generation, 1st generation+, 2nd generation, etc. When buying, you must confirm this information to avoid infringement of rights and interests. At present, the night vision devices of the ORPHA brand in the market have a clear identification on the product packaging and the machine which is the first generation of the image enhancer tube. It should be noted that the application industry of the 4th generation and higher-level night vision devices is limited in China, and it is not allowed to be sold in the civilian industry.
2. Magnification and lens: carefully check the magnification and lens of the night vision device. In the same situation of night vision devices with image intensifier tube level, the principle is that the larger the aperture, the farther the observation distance is, and the better the effect 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. Because no matter which level of night vision device the infrared auxiliary function cannot be underestimated, especially the first-generation night vision device, the intensity of infrared and the distance of the irradiation distance directly affect the viewing effect.
5. Resolution: Resolution is very important. Of course, the night vision device directly reflects the parameters of the image intensifier tube level. The higher the resolution, the clearer the displayed image and the higher the recognition of the target, which directly determines the viewing distance. .
As for the nominal observation distance of the night vision device, the identification distance. Since there is no formal standard in the industry, various opinions vary. Generally speaking, the observation distance and recognition distance of the night vision device are based on the human-sized target as the observation object, and then marked one by one according to the light conditions of the use environment (starlight, moonlight, etc.), the statistics of this data are very cumbersome , even the night vision device brand will not go to do this easily.
