At present, the infrared camera has the highest market share of LED infrared cameras, but the vast majority of products can only reach within 100 meters. In terms of applications, infrared cameras are mainly used in civilian applications. In actual use, infrared cameras also have their own drawbacks. Commonly there are four major problems... First, the problem of focus shift Due to different wavelengths of visible light and infrared light, the imaging focus is not on one plane, resulting in clear images under visible light conditions during the day, blurring under nighttime infrared light conditions, or clear images under nighttime infrared light conditions, and image blurring under daytime visible light conditions. It can be solved in three ways. First, the use of automatic focusing integrated camera; second, the use of IR special focus does not shift the lens; third, the use of professional adjustment tools, under the existing lens conditions can also be achieved without offset. Second, color issues All black and white cameras are infrared-sensitive. Infrared light is a stray light for a color camera under visible light conditions, which will degrade the sharpness and color reproduction of the color camera. The filter of the color camera is to prevent infrared rays from participating in imaging. There are two ways to make the color camera sense infrared light. First, switch the filter to block the infrared light from entering under visible light; remove the filter under the condition of no visible light and let the infrared light enter. The image quality is good, but the cost is high and the switching mechanism will cause a certain failure rate. Second, opening a specific infrared channel on the filter allows infrared rays with the same wavelength as the IR lamp to come in. This method does not increase the cost, but the color reproduction is slightly worse. Third, the issue of sensitivity Camera sensitivity is a core part of infrared night vision monitoring. The better the sensitivity, the stronger the ability to sense infrared rays. Of course, the better the sensitivity, the more expensive the camera is. In general, infrared night vision systems within 50 meters, of course, with the increase in sensitivity, the price of the camera will have a larger increase. Fourth, the problem of distance One hundred people will have a standard infrared night vision distance for infrared products. I think it should be based on the effectiveness of the customer's application. What is the customer's standard? Is to see people! What "visual distance", "discovery distance", these uncertain claims are ambiguous. The matching of cameras and lenses in different grades may cause the sensitivity of the light emitted from the same infrared lamp to be many times different, and the visual distance may also be much different. Therefore, it is unscientific to say how many meters a concrete infrared light is. A working distance of an infrared lamp can only be determined by matching the camera and lens of a certain quality. Also, because of the different environments in which the applications are applied, the effects will be very different and it is best to leave a certain margin. From Shenzhen Wei'ao Vision Technology Co., Ltd.
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