Under normal circumstances, we do not need to deliberately choose infrared cameras. Today's day and night conversion cameras and ultra-low illumination cameras can meet the needs of most surveillance systems. Only those with special needs or applications need to use infrared cameras.
Camera Selection When planning to install an infrared night vision system, you must choose a camera system with better color. What should be clear is that not all cameras can be applied to infrared night vision systems. Color cameras cannot be used together with infrared night vision systems. This is because the color cameras cannot be sensitive to the infrared rays emitted by the infrared night vision system. The color system cameras can easily remove infrared rays due to their own equipped CCD infrared filters. Drop it. So when you are in the system design, please choose black and white camera or day and night conversion camera to match the use of infrared night vision system. In order to make the infrared night vision system give full play to its own functional advantages, please use the low-illumination camera as much as possible. In this case, the image quality of infrared night vision will be improved to a greater extent, and eventually a high-quality surveillance image will be achieved.
The selection of the irradiation distance is based on the project implementation target. In fact, the type of infrared lamp is selected in the selection of the irradiation distance. As usual in outdoor environments, if you need to observe objects as far away as 100 meters away, it is obvious that infrared lamps using LEDs are less suitable. Halogen infrared lamps that can illuminate long distances must be used. Similarly, for indoor 20 or 30 meter observation environments, if infrared halogen lamps are used, it will cause a huge wave of equipment functional resources. At this time, it is necessary to use LED infrared lamps.
Installation Notes 1. The commissioning of the infrared light must take place at night. The infrared beam illumination position is adjusted at night through an imaging device such as a monitor. And can effectively adjust the lens aperture settings.
2. The infrared light cannot directly face the camera. The infrared light seen by the camera is the same as the daylight seen by humans, which causes the phenomenon of anti-whitening.
3. The infrared lamp is not necessarily installed in the same position as the camera. If the camera is far away from the illuminated object, consider installing the infrared lamp between the two. The best way to install in the same location is to install the infrared lamp and the camera in an overlapping manner.
4. The installation height of the infrared lamp should not exceed 4 meters, too high will affect the reflectivity of light. The angle should be from the top down angle of 20 degrees, and the elevation angle is too large to reflect.
5. The working indicator of the infrared lamp must be guaranteed (see the product specification for details). For example, the power supply of the infrared lamp must be higher than the operating power of the infrared lamp itself.
6. Users should first read the instruction manual carefully when using the infrared light, especially the precautions for ensuring personal equipment safety. Check whether the supporting aspects mentioned in the previous section meet the requirements. Whether the influencing factors that should be taken into consideration should be taken into consideration, if not meet the requirements, the equipment used can be adjusted in time.
Points for attention when using: First, using a large-angle infrared lamp with a small-angle lens, there is a waste of light. Second, the larger the angle of emission of the infrared light, the better the picture.
The problem of the amount of light flux: The relative aperture determines the light transmission capability of the lens, and the lens light flux of the relative aperture f1.0 is four times the light flux of the lens of the relative aperture f2.0. The same camera, infrared light, respectively, with the above two lenses, infrared action distance can be doubled. Large-aperture lenses are four to ten times better than conventional lenses in terms of infrared monitoring. It is reasonable to say that they should become necessary accessory products for infrared night-vision monitoring. However, due to high costs and technical difficulties, most infrared product manufacturers do not have the ability to supply.
Focus shift problem: visible light and infrared light due to different wavelengths, imaging focus is not on a plane, resulting in clear images in the daytime visible light conditions, and nighttime infrared light conditions blurred, or night infrared light conditions, clear images, daytime visible light conditions The image is blurred. It can be solved in three ways. First, the use of autofocus integrated camera; second, the use of special focus does not shift the lens; third, the use of professional adjustment tools, in the existing lens conditions can also achieve non-shift color issues: all black and white cameras are Inductive infrared light. 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.
How far can infrared night vision go? When technology arrives, an infrared night vision system over 100 meters is not that difficult. When technology arrives at home, it means that you must master infrared light technology, infrared sensor camera technology and infrared sensor lens technology at the same time, all three are indispensable. Now the products on the market have been more than 500 meters away from the market, but the cost is relatively high, and the civilian market is still relatively limited.
Camera Selection When planning to install an infrared night vision system, you must choose a camera system with better color. What should be clear is that not all cameras can be applied to infrared night vision systems. Color cameras cannot be used together with infrared night vision systems. This is because the color cameras cannot be sensitive to the infrared rays emitted by the infrared night vision system. The color system cameras can easily remove infrared rays due to their own equipped CCD infrared filters. Drop it. So when you are in the system design, please choose black and white camera or day and night conversion camera to match the use of infrared night vision system. In order to make the infrared night vision system give full play to its own functional advantages, please use the low-illumination camera as much as possible. In this case, the image quality of infrared night vision will be improved to a greater extent, and eventually a high-quality surveillance image will be achieved.
The selection of the irradiation distance is based on the project implementation target. In fact, the type of infrared lamp is selected in the selection of the irradiation distance. As usual in outdoor environments, if you need to observe objects as far away as 100 meters away, it is obvious that infrared lamps using LEDs are less suitable. Halogen infrared lamps that can illuminate long distances must be used. Similarly, for indoor 20 or 30 meter observation environments, if infrared halogen lamps are used, it will cause a huge wave of equipment functional resources. At this time, it is necessary to use LED infrared lamps.
Installation Notes 1. The commissioning of the infrared light must take place at night. The infrared beam illumination position is adjusted at night through an imaging device such as a monitor. And can effectively adjust the lens aperture settings.
2. The infrared light cannot directly face the camera. The infrared light seen by the camera is the same as the daylight seen by humans, which causes the phenomenon of anti-whitening.
3. The infrared lamp is not necessarily installed in the same position as the camera. If the camera is far away from the illuminated object, consider installing the infrared lamp between the two. The best way to install in the same location is to install the infrared lamp and the camera in an overlapping manner.
4. The installation height of the infrared lamp should not exceed 4 meters, too high will affect the reflectivity of light. The angle should be from the top down angle of 20 degrees, and the elevation angle is too large to reflect.
5. The working indicator of the infrared lamp must be guaranteed (see the product specification for details). For example, the power supply of the infrared lamp must be higher than the operating power of the infrared lamp itself.
6. Users should first read the instruction manual carefully when using the infrared light, especially the precautions for ensuring personal equipment safety. Check whether the supporting aspects mentioned in the previous section meet the requirements. Whether the influencing factors that should be taken into consideration should be taken into consideration, if not meet the requirements, the equipment used can be adjusted in time.
Points for attention when using: First, using a large-angle infrared lamp with a small-angle lens, there is a waste of light. Second, the larger the angle of emission of the infrared light, the better the picture.
The problem of the amount of light flux: The relative aperture determines the light transmission capability of the lens, and the lens light flux of the relative aperture f1.0 is four times the light flux of the lens of the relative aperture f2.0. The same camera, infrared light, respectively, with the above two lenses, infrared action distance can be doubled. Large-aperture lenses are four to ten times better than conventional lenses in terms of infrared monitoring. It is reasonable to say that they should become necessary accessory products for infrared night-vision monitoring. However, due to high costs and technical difficulties, most infrared product manufacturers do not have the ability to supply.
Focus shift problem: visible light and infrared light due to different wavelengths, imaging focus is not on a plane, resulting in clear images in the daytime visible light conditions, and nighttime infrared light conditions blurred, or night infrared light conditions, clear images, daytime visible light conditions The image is blurred. It can be solved in three ways. First, the use of autofocus integrated camera; second, the use of special focus does not shift the lens; third, the use of professional adjustment tools, in the existing lens conditions can also achieve non-shift color issues: all black and white cameras are Inductive infrared light. 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.
How far can infrared night vision go? When technology arrives, an infrared night vision system over 100 meters is not that difficult. When technology arrives at home, it means that you must master infrared light technology, infrared sensor camera technology and infrared sensor lens technology at the same time, all three are indispensable. Now the products on the market have been more than 500 meters away from the market, but the cost is relatively high, and the civilian market is still relatively limited.
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