The selection method of night vision equipment
1. Image intensifier tube: This directly determines the level of night vision equipment purchased. According to the level of image enhancement tubes, from 1st generation, 1st generation+, 2nd generation, etc., it is important to confirm this information when purchasing to avoid infringement of rights and interests. At present, night vision devices from brands such as ORPHA Alpha have clear markings on their product packaging and machines indicating which generation of image intensifiers they are. It should be noted that the application industry of 4th generation and higher level night vision devices is restricted in China and sales in civilian industries are not allowed.
2. Magnification and lens: Carefully examine the magnification and lens of the night vision instrument. The principle for night vision devices with the same level of image intensifier is that the larger the aperture, the farther the observation distance, and the better the effect.
3. Image enhancement technology: Generally, night vision devices equipped with this technology will have better image brightness and clearer under the same conditions.
4. Infrared emitter: The quality of its performance directly affects the imaging quality. Because regardless of the level of night vision device, the auxiliary effect of infrared is not to be underestimated, especially for the first generation night vision device, the intensity of infrared and the distance of illumination directly affect the viewing effect.
5. Resolution: Resolution is very important, and of course, it is a direct reflection parameter of the image intensifier level in night vision devices. 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 and identification distance of the night vision instrument. Due to the lack of formal industry standards, various opinions vary. Generally speaking, the observation distance and identification distance of night vision devices are based on targets of human size, and then indicated one by one according to the lighting conditions of the usage environment (starlight, moonlight, etc.). The statistics of this data are very cumbersome, and even night vision device brands will not easily do this.
