[ Huaqiang Security Network News ] Many people are most concerned about the line-of-sight of infrared cameras. This is actually a common problem. It is necessary to clarify the following factors. 
1. Image sharpness: The image sharpness produced by the camera at the minimum illumination is measured by the TV signal test card. The black and white stripes require black reflectance of nearly 0% and white reflectance of greater than 89.9%. When we observe it on site, we sometimes don't have such conditions. For example, leaves and grasses and some black things have low reflectivity, and the contrast is small, so it is not easy to obtain clear images. White objects have high reflectivity and contrast is large. It is easy to get a clear image. Infrared camera is passive infrared; that is to say, the effect of infrared is not only related to the quality of infrared light, but also related to the redness of CCD, and the reflection intensity of the object being illuminated. That is to say, the same camera, a person wearing white clothes may see clearly in a hundred meters, and a person wearing black clothes may not see clearly in forty meters.
2, subjective standards: each person's standard is also different, 100 meters to see clearly, refers to see a hundred meters of elephants or see a chicken? It is found that there is a difference between the distance and the actual distance. If the distance is clear, there is one person, which means that a person can be seen; the actual distance is clear that one person can see the outline of a person; there is also a possibility, subjective The difference is also different. Everyone's eyes are different. Subjective feelings are also different. I have customers, the same camera. Some people say that they can watch 60 meters. Some people say that they can only watch 30 meters.
3, product quality: undeniable, the quality is really different, there are many inferior manufacturers (processing plants), regardless of the credibility, add some messy things, I have seen someone dare to take a quarter of Sharp as Sony, there are 24 The camera of the lamp, the cost of the machine in the cost of more than one hundred yuan, reported a hundred meters of infrared distance, that is, everyone is pursuing low prices, long distance, the unrealistic pursuit of the engineering firm caused some terrible lies of equipment manufacturers.
4, objective actual effect: the objective actual effect of the infrared camera, in addition to its circuit orientation, CCD induction quality, infrared light quality, lens and other factors, but also has a certain relationship with the quality of the installed personnel; some can be solved Problems, such as halo, flashlight phenomenon, in fact, when the installation is a little attention, can be completely ruled out; in addition, the protective cover also has an effect on the effect of infrared light, infrared light in the transmission process, through different media, transmittance and reflection The rate is also different. Different window glass, especially automatic defrost coated glass, has different attenuation of infrared light.
2, subjective standards: each person's standard is also different, 100 meters to see clearly, refers to see a hundred meters of elephants or see a chicken? It is found that there is a difference between the distance and the actual distance. If the distance is clear, there is one person, which means that a person can be seen; the actual distance is clear that one person can see the outline of a person; there is also a possibility, subjective The difference is also different. Everyone's eyes are different. Subjective feelings are also different. I have customers, the same camera. Some people say that they can watch 60 meters. Some people say that they can only watch 30 meters.
3, product quality: undeniable, the quality is really different, there are many inferior manufacturers (processing plants), regardless of the credibility, add some messy things, I have seen someone dare to take a quarter of Sharp as Sony, there are 24 The camera of the lamp, the cost of the machine in the cost of more than one hundred yuan, reported a hundred meters of infrared distance, that is, everyone is pursuing low prices, long distance, the unrealistic pursuit of the engineering firm caused some terrible lies of equipment manufacturers.
4, objective actual effect: the objective actual effect of the infrared camera, in addition to its circuit orientation, CCD induction quality, infrared light quality, lens and other factors, but also has a certain relationship with the quality of the installed personnel; some can be solved Problems, such as halo, flashlight phenomenon, in fact, when the installation is a little attention, can be completely ruled out; in addition, the protective cover also has an effect on the effect of infrared light, infrared light in the transmission process, through different media, transmittance and reflection The rate is also different. Different window glass, especially automatic defrost coated glass, has different attenuation of infrared light.
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