Foreword: The infrared integrated camera is a camera device that integrates cameras, protective covers, infrared lamps, power supply and cooling units into one. The basic principle of night vision is to use ordinary CCD black-and-white cameras to sense the spectral characteristics of infrared light (that is, visible light and infrared light can be felt). The infrared light is used as an “illumination source†for night vision imaging. With the wide application of infrared cameras, infrared cameras have received more and more attention. So, at this stage, there are still several aspects of infrared cameras that need to be strengthened.
1. The effect of night vision is not ideal This phenomenon is mainly the effect of the flashlight or the distance is not enough. This problem is mainly caused by the angle and function of infrared lamps. The infrared lamp used by our infrared cameras is also called the 850 infrared emission tube. The peak wavelength is 850 nm, and the angle can be selected from 5-60 degrees. When the infrared emission tube angle is smaller, the farther the irradiation distance, the more obvious the effect of the flashlight. Conversely, the greater the angle, there is no effect of the flashlight, but the distance is greatly reduced. To solve this problem, it is mainly to see what kind of effect the manufacturer wants to pursue. And what kind of cost, of course, the power and price of infrared emitters are proportional.
2. During the day, the color reproduction is not enough. The color of the infrared camera is more or less color cast during the day. The most direct reason is the problem of the camera filter. Generally, the infrared camera uses a double peak that can transmit a certain percentage of infrared light. The advantage of the filter is its low cost, but since natural light contains more infrared components, it will interfere with color reproduction when it enters the CCD, such as the green plants become gray and so on (especially in sunny outdoor environments). The use of the IPCUT dual filter effectively solves this problem. The IRCUT dual filter consists of an infrared cut filter and a full-spectrum optical glass. When the daylight is sufficient, the infrared cut filter works, and the CCD is restored. With real colors, when the nighttime light is insufficient, the infrared cut filter automatically moves away, and the full-spectrum optical glass starts to work, making the CCD make full use of all the light, thereby greatly improving the infrared performance.
3. Factors influencing the service life of infrared lamps Some of the electrical energy consumed by a lamp tube is converted into effective light energy, and some of it is converted into heat energy. This is unavoidable. The problem is that the heat generated must be reasonably controlled and disposed of. When too much heat is generated, or if the proper temperature-reduction measures are not taken, the temperature rise in the machine is too high, which results in excessively fast aging of the lamp and causes the irradiation distance to drop too quickly. In particular, some producers do not have a healthy business philosophy. They are unilaterally pursuing the performance at the time of delivery, ignoring the service life of the product, and are desperately pursuing brightness and distance without solving the problem of excessive heat generation and temperature rise. The service life drops rapidly.
In the night vision monitoring system, the conventional method is to use visible light illumination, but this method has the disadvantages of being hidden and easily exposed to the monitoring target, and therefore is less used; currently, the hidden and scientific night vision monitoring adopts infrared camera technology. Infrared camera technology is divided into passive and active. Passive infrared camera technology uses infrared radiation at any absolute temperature above -273°C. The higher the temperature of an object, the more infrared radiation it emits. Cameras made using this principle are typically infrared thermal imaging cameras. However, such special infrared cameras are expensive to manufacture and therefore are limited to military or special applications. The active infrared camera technology uses infrared light radiation "lighting" (mainly infrared light), the application of ordinary low-light black and white camera, color to black and white camera or infrared low-light color camera, feel the surrounding scenery and the environment reflected infrared light back Night vision monitoring. Active infrared camera technology is mature and stable, becoming the mainstream of night vision surveillance.
The power and angle of the infrared lamp, the configuration of the camera, the infrared lens of a certain focal length, and whether there is a good power supply heat treatment are important parameters for judging the performance of the infrared integrated camera. At present, there are many products on the market that are separate from the infrared projector. This requires the user to have a sufficient understanding of the performance of the infrared lamp and the camera, and to make a reasonable match based on the angle of the infrared lamp and the camera lens parameters.
1. The effect of night vision is not ideal This phenomenon is mainly the effect of the flashlight or the distance is not enough. This problem is mainly caused by the angle and function of infrared lamps. The infrared lamp used by our infrared cameras is also called the 850 infrared emission tube. The peak wavelength is 850 nm, and the angle can be selected from 5-60 degrees. When the infrared emission tube angle is smaller, the farther the irradiation distance, the more obvious the effect of the flashlight. Conversely, the greater the angle, there is no effect of the flashlight, but the distance is greatly reduced. To solve this problem, it is mainly to see what kind of effect the manufacturer wants to pursue. And what kind of cost, of course, the power and price of infrared emitters are proportional.
2. During the day, the color reproduction is not enough. The color of the infrared camera is more or less color cast during the day. The most direct reason is the problem of the camera filter. Generally, the infrared camera uses a double peak that can transmit a certain percentage of infrared light. The advantage of the filter is its low cost, but since natural light contains more infrared components, it will interfere with color reproduction when it enters the CCD, such as the green plants become gray and so on (especially in sunny outdoor environments). The use of the IPCUT dual filter effectively solves this problem. The IRCUT dual filter consists of an infrared cut filter and a full-spectrum optical glass. When the daylight is sufficient, the infrared cut filter works, and the CCD is restored. With real colors, when the nighttime light is insufficient, the infrared cut filter automatically moves away, and the full-spectrum optical glass starts to work, making the CCD make full use of all the light, thereby greatly improving the infrared performance.
3. Factors influencing the service life of infrared lamps Some of the electrical energy consumed by a lamp tube is converted into effective light energy, and some of it is converted into heat energy. This is unavoidable. The problem is that the heat generated must be reasonably controlled and disposed of. When too much heat is generated, or if the proper temperature-reduction measures are not taken, the temperature rise in the machine is too high, which results in excessively fast aging of the lamp and causes the irradiation distance to drop too quickly. In particular, some producers do not have a healthy business philosophy. They are unilaterally pursuing the performance at the time of delivery, ignoring the service life of the product, and are desperately pursuing brightness and distance without solving the problem of excessive heat generation and temperature rise. The service life drops rapidly.
In the night vision monitoring system, the conventional method is to use visible light illumination, but this method has the disadvantages of being hidden and easily exposed to the monitoring target, and therefore is less used; currently, the hidden and scientific night vision monitoring adopts infrared camera technology. Infrared camera technology is divided into passive and active. Passive infrared camera technology uses infrared radiation at any absolute temperature above -273°C. The higher the temperature of an object, the more infrared radiation it emits. Cameras made using this principle are typically infrared thermal imaging cameras. However, such special infrared cameras are expensive to manufacture and therefore are limited to military or special applications. The active infrared camera technology uses infrared light radiation "lighting" (mainly infrared light), the application of ordinary low-light black and white camera, color to black and white camera or infrared low-light color camera, feel the surrounding scenery and the environment reflected infrared light back Night vision monitoring. Active infrared camera technology is mature and stable, becoming the mainstream of night vision surveillance.
The power and angle of the infrared lamp, the configuration of the camera, the infrared lens of a certain focal length, and whether there is a good power supply heat treatment are important parameters for judging the performance of the infrared integrated camera. At present, there are many products on the market that are separate from the infrared projector. This requires the user to have a sufficient understanding of the performance of the infrared lamp and the camera, and to make a reasonable match based on the angle of the infrared lamp and the camera lens parameters.
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