Brief analysis of infrared camera technology and market

Infrared camera is in the night vision state, the camera will emit infrared light that is invisible to the naked eye to illuminate the object being photographed, turn off the infrared filter, no longer block the infrared light from entering the CCD, the infrared light is reflected by the object and enters the lens. Imaging, what we are seeing is an image made by infrared reflection, rather than an image of visible light reflection, which means that images that are invisible to the naked eye in a dark environment can be captured. Video surveillance is developing outdoors, outdoor monitoring is developing toward night vision, and the development direction of night vision is based on infrared. This trend has become the development trend of the camera industry. According to the real data of Mr. Chen Youlin from Shenzhen Sanchen Technology Co., Ltd. in the market in Beijing at the end of 2007, the occupancy rate of infrared cameras in engineering cases has exceeded 58%, and by the end of 2008, it has reached 63%, and it has increased year by year. the trend of.

With the increasing demand for infrared cameras, the technology of infrared cameras is also constantly improving. For example, the active infrared technology from the early effective efficiency of only 5%, to the current effective 25-30% LEDArray technology, to meet the short-range to medium-distance infrared night vision technology breakthrough, and the adoption of the new laser night vision technology is One of the ways to achieve long-distance night vision monitoring. Laser night vision technology is to adjust the focus state of the illumination system, illuminate all or key parts of the target to meet the detection requirements of the imaging system, and achieve imaging of the target. Through remote communication, the motion rotation system and imaging system and laser transmitter are controlled to monitor and track stationary or moving targets within the full surveillance range. Compared with LED, laser has high brightness, good coherence, good monochromaticity, good directionality, long life and strong sensitivity of CCD to its wavelength. It determines that laser can illuminate farther distance, and light intensity It is also much stronger than conventional light sources.

In addition, integration with another night vision technology, low-light technology, is also one of the future development directions. The low-light night vision device has clear image, small size, light weight, low price, convenient use and maintenance, and is not easy to be detected and interfered by electronic, so the application range is wide. The low-light-level night vision device has a fast response speed, and high-speed photography can be realized by using a photocathode tube. Generally, the low-light imaging surface is a continuous target surface, and the resolution during the period is very high, and currently up to 90 lp/IIHn. Equivalent to more than l600 TV lines. The low-light night video spectrum response has great potential for expanding to the short-wave range, including high-energy ions, x-rays, ultraviolet rays, and blue-green scenes. The detection imaging is basically based on the principle of low-light imaging technology such as external photoelectric conversion, enhancement, processing, and display. mouth. The contrast of the low-light image is poor, the gray level is limited, the instantaneous dynamic range is poor, and there is flicker at high gain, which is only sensitive to the reflection of the target scene, and has nothing to do with the thermal contrast of the target scene. The infrared image has poor contrast and large dynamic range, but it is only sensitive to the radiation of the target scene, but not sensitive to the brightness change of the scene. Both have shortcomings. With the development of low-light and infrared imaging technology, integrating and exploring the characteristic information of low-light and infrared images to integrate them into more comprehensive images has developed into an effective technical means. Night vision image fusion enhances scene understanding and highlights targets, facilitating faster and more accurate detection of targets in military contexts that are hidden, disguised, and confusing. Displaying the fused image as a natural form suitable for human eye observation can significantly improve the recognition performance of the human eye and reduce the operator's fatigue. In the period when the low-light and infrared technologies are constantly progressing, considering the complementarity of the two, how to combine the low-light image with the infrared image to obtain a better observation effect without increasing the difficulty of the prior art becomes the current One of the hot researches on the development of night vision technology.

At the same time, with the intensification of high-definition, network and intelligent trends, security applications or solutions based on digital, networked and intelligent applications have become the trend of the times. The traditional security industry is facing a huge impact, especially with simulation. The monitoring industry has the greatest impact. At the same time, security monitoring products have significantly increased the penetration of household-oriented personal or civilian markets, bringing many different options to the innovation and development of infrared cameras. It must meet the monitoring requirements of dark and nighttime areas, meet the management needs of industry customers for efficient, easy to use and convenient, and also break through the bottleneck of analog monitoring management, realize remote monitoring, intelligent management, break through geographical and time constraints. In order to make the business opportunities of the infrared camera fully visible.