Lens technology in the light transmission aperture of the camera first look at the technical application and requirements in the night vision, general day and night cameras in the need for 24-hour continuous monitoring of the road, airport, port or school perimeter and factory, residential building, parking The use of uninterrupted power is not used in the field, so the imaging requirements for high-quality day-night cameras are also increasing. The advantage of the dual-use day/night camera is that even in low-light environments or even in environments with no visible light illumination, night-time or near-infrared light can be used to illuminate the monitoring object, clear images can be observed, and monitoring objects can be identified. Both need a suitable aspherical lens and infrared filter imaging technology in the lens. If only a general spherical red filter lens is not installed on a day/night camera, in the night mode, the image focus distance will be shifted due to the inability to focus the image and color aberration will occur. image.
To overcome this problem and make the lens suitable for day/night cameras, it is necessary to minimize chromatic aberration from the visible light region to the near infrared region. For the lens, the longer the focal length, the more difficult it is to compensate for chromatic aberration; if the color difference in the visible and near-infrared regions increases, the focal length is more pronounced. Therefore, aspherical lens technology must be used to reduce the dispersion of optical lens and chromatic aberration. With this aspherical lens imaging technology, Day/Night can be monitored in Day/Night or Day/Night when the color image is in the daytime. It can also control the focal length offset problem to intangible. It can be continuously monitored 24 hours a day and night. Application requirements. In addition, due to IR's wide range of day and night lens wavelengths, it is necessary to pay attention to the problem of light spot caused by the transmittance, and careful to do a good job of pre-approved inspection and selection of the lens coating effect.
The F value of the lens will increase with the lens diameter, and it will decrease inversely. The smaller the F value, the better the performance. In order to obtain a large amount of light into the lens, sometimes by increasing the aperture and length of the lens to obtain a smaller F value, thereby improving the performance of the lens. This is a common application in lens technology. However, due to the design and application of surveillance cameras, as well as the limitations of the installation site, the volume has become smaller and smaller, and the lens itself has to be more compact, which also makes the design of the lens aperture larger. What merits more attention is to design a smaller lens F value, it is necessary to increase the design of compensation aberrations, which is a difficult application of lens technology, because the aberration will make the lens optical performance changes deformation imaging and appearance The increase in this inch. Fortunately, in this part, the suppression of the performance deformation and the increase of the external dimensions can be solved by adopting the aspherical lens design to effectively compensate the aberration and realize the miniaturization design. In the current market, a variety of focal length manual zoom lens is born in response to this demand, the current lens size and diameter continue to increase, F1.0 or even greater are already possible.
Lens technology in the relationship between the size of the camera imaging application monitoring camera angle covering size and lens imaging technology is absolutely related to the recent high-definition video slogans, monitoring wide-angle has become the focus of inspection cameras set up inspection, but this is not a camera The problem that can be completely taken up in the past was that in many places such as entrance gates, stairwells, buses, subways, elevators, and bank teller areas where cameras were installed, there was a dilemma that could not fully cover the desired scenery, and it was often necessary to erect more cameras. Multi-cameras can achieve the requirements of monitoring without dead ends. However, with the improved imaging technology of the lens, the current technology only needs to use a wide-angle camera to cover all the monitored screen requirements. However, in the pursuit of wide-angle, we must pay attention to avoid the problems that come with it. For example, after the increase in the diameter of the front lens, the size of the camera will increase, the distortion of the image, and the distortion rate will become higher. These are lens technologies and imaging. Part of the relationship to be careful, but it is good that the lens technology is also developed to solve these application problems as well as the technology of wide-angle lenses plus multi-focal length and manual zoom.
The application of lens technology in the monitoring of high-definition images is a well-established fact in the demand for megapixel lenses, regardless of whether it is used in any kind of industrial application, except that the camera's image sensor is moving toward high-definition image trends. In order to truly achieve clear and detailed high-definition video, megapixel cameras ranging from 2 million to 3 million, and even 5 million pixels are commercially available. However, there is still a problem, that is, for the part of the high-power zoom lens, which is applied to the high-speed ball, because the telescopic lens group of the movement module also has a high-transmittance lens with an aspherical surface, there are still many opinions, even in parts. According to actual measurements, the results show that the HD resolution of high-definition cameras is still significantly different from the HD camcorder with the same conditions.
In addition, the simulation monitoring camera resolution, after the advent of the 960H chip, the resolution and recognition rate from the past 540TVL to 700TVL. Therefore, the high-definition lens technology in order to meet the emergence of these high-definition video camera is also spontaneous combustion in the development of technology from the original maximum of 2 million pixels in one fell swoop developed to a 5-megapixel technical level. Again with CMOS
The constant height of the pixels of the sensor photosensitive component causes the pixel size of the pixel pixel to become smaller accordingly, so the pixel transfer force MTF (Modulation Transfer Function) of the lens; that is, the pixel resolution of the pixel transmitted by the original optical imaging is The frequency value of the ability to display the contrast as the resolution also has to be increased in order to resolve the more detailed corresponding line TVL (TVLine). In order to effectively perform high pixel performance, these lenses have high resolution and high contrast not only at the center of the screen but also at the edges of the screen. At the same time, the surveillance lens has not only reduced distortion in the imaging technology, but also the current manufacturing technology has a robust structure that is shockproof and crashworthy, and a fixed knob that prevents accidental contact with the focus offset. It can be said that the entire technology is monitored. The lens has improved in both structure and application technology over the previous lens improvements.
High-definition surveillance has become an obvious trend in recent years. The functional requirements and application requirements of the surveillance application market are also increasing. With the development of high-definition cameras, the camera has been leading the development of the lens, only to see the lens in this year. New application technologies such as night vision and fog penetration have also caught up, and the monitoring application is no longer stretched like the previous two years. It seems that this is a blessing for high-definition surveillance.
To overcome this problem and make the lens suitable for day/night cameras, it is necessary to minimize chromatic aberration from the visible light region to the near infrared region. For the lens, the longer the focal length, the more difficult it is to compensate for chromatic aberration; if the color difference in the visible and near-infrared regions increases, the focal length is more pronounced. Therefore, aspherical lens technology must be used to reduce the dispersion of optical lens and chromatic aberration. With this aspherical lens imaging technology, Day/Night can be monitored in Day/Night or Day/Night when the color image is in the daytime. It can also control the focal length offset problem to intangible. It can be continuously monitored 24 hours a day and night. Application requirements. In addition, due to IR's wide range of day and night lens wavelengths, it is necessary to pay attention to the problem of light spot caused by the transmittance, and careful to do a good job of pre-approved inspection and selection of the lens coating effect.
The F value of the lens will increase with the lens diameter, and it will decrease inversely. The smaller the F value, the better the performance. In order to obtain a large amount of light into the lens, sometimes by increasing the aperture and length of the lens to obtain a smaller F value, thereby improving the performance of the lens. This is a common application in lens technology. However, due to the design and application of surveillance cameras, as well as the limitations of the installation site, the volume has become smaller and smaller, and the lens itself has to be more compact, which also makes the design of the lens aperture larger. What merits more attention is to design a smaller lens F value, it is necessary to increase the design of compensation aberrations, which is a difficult application of lens technology, because the aberration will make the lens optical performance changes deformation imaging and appearance The increase in this inch. Fortunately, in this part, the suppression of the performance deformation and the increase of the external dimensions can be solved by adopting the aspherical lens design to effectively compensate the aberration and realize the miniaturization design. In the current market, a variety of focal length manual zoom lens is born in response to this demand, the current lens size and diameter continue to increase, F1.0 or even greater are already possible.
Lens technology in the relationship between the size of the camera imaging application monitoring camera angle covering size and lens imaging technology is absolutely related to the recent high-definition video slogans, monitoring wide-angle has become the focus of inspection cameras set up inspection, but this is not a camera The problem that can be completely taken up in the past was that in many places such as entrance gates, stairwells, buses, subways, elevators, and bank teller areas where cameras were installed, there was a dilemma that could not fully cover the desired scenery, and it was often necessary to erect more cameras. Multi-cameras can achieve the requirements of monitoring without dead ends. However, with the improved imaging technology of the lens, the current technology only needs to use a wide-angle camera to cover all the monitored screen requirements. However, in the pursuit of wide-angle, we must pay attention to avoid the problems that come with it. For example, after the increase in the diameter of the front lens, the size of the camera will increase, the distortion of the image, and the distortion rate will become higher. These are lens technologies and imaging. Part of the relationship to be careful, but it is good that the lens technology is also developed to solve these application problems as well as the technology of wide-angle lenses plus multi-focal length and manual zoom.
The application of lens technology in the monitoring of high-definition images is a well-established fact in the demand for megapixel lenses, regardless of whether it is used in any kind of industrial application, except that the camera's image sensor is moving toward high-definition image trends. In order to truly achieve clear and detailed high-definition video, megapixel cameras ranging from 2 million to 3 million, and even 5 million pixels are commercially available. However, there is still a problem, that is, for the part of the high-power zoom lens, which is applied to the high-speed ball, because the telescopic lens group of the movement module also has a high-transmittance lens with an aspherical surface, there are still many opinions, even in parts. According to actual measurements, the results show that the HD resolution of high-definition cameras is still significantly different from the HD camcorder with the same conditions.
In addition, the simulation monitoring camera resolution, after the advent of the 960H chip, the resolution and recognition rate from the past 540TVL to 700TVL. Therefore, the high-definition lens technology in order to meet the emergence of these high-definition video camera is also spontaneous combustion in the development of technology from the original maximum of 2 million pixels in one fell swoop developed to a 5-megapixel technical level. Again with CMOS
The constant height of the pixels of the sensor photosensitive component causes the pixel size of the pixel pixel to become smaller accordingly, so the pixel transfer force MTF (Modulation Transfer Function) of the lens; that is, the pixel resolution of the pixel transmitted by the original optical imaging is The frequency value of the ability to display the contrast as the resolution also has to be increased in order to resolve the more detailed corresponding line TVL (TVLine). In order to effectively perform high pixel performance, these lenses have high resolution and high contrast not only at the center of the screen but also at the edges of the screen. At the same time, the surveillance lens has not only reduced distortion in the imaging technology, but also the current manufacturing technology has a robust structure that is shockproof and crashworthy, and a fixed knob that prevents accidental contact with the focus offset. It can be said that the entire technology is monitored. The lens has improved in both structure and application technology over the previous lens improvements.
High-definition surveillance has become an obvious trend in recent years. The functional requirements and application requirements of the surveillance application market are also increasing. With the development of high-definition cameras, the camera has been leading the development of the lens, only to see the lens in this year. New application technologies such as night vision and fog penetration have also caught up, and the monitoring application is no longer stretched like the previous two years. It seems that this is a blessing for high-definition surveillance.
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