With the popularity of AI today, more and more innovative applications need to be completed with the help of machine vision, and the premise of "understanding" the effectiveness of AI is that the equipment can see and see clearly. In this process, the importance of optical lens is self-evident, especially the AI in the security industry. With the deepening of the application of security AI technology, the technical upgrading of security lens, as a key component of surveillance camera, seems to be inevitable. From the development trend of video surveillance system, the technical upgrading route of security lens is mainly reflected in the following aspects:

Upgrade route of security lens technology

Reliability and lens cost: the reliability of security lens mainly refers to the heat resistance of the system. Surveillance cameras need to work in extreme weather conditions. A good surveillance lens needs to keep the focus at 60-70 degrees Celsius without visible image distortion. But at the same time, the market is shifting from glass lens to glass plastic hybrid lens (which means mixing aspheric plastic lens and glass) to improve resolution and reduce cost. SECULENS factory mixes aspheric plastic lens and glass production to provide high-quality and good optical lens products for users all over the world.

Resolution and bandwidth cost:compared with other camera lenses, monitoring lenses usually do not need high resolution; The current mainstream is 1080p (= 2MP), which will still increase from about 65% to 72% in 2020. As the bandwidth cost is still very important in the current system, the resolution upgrade will increase the system construction and operation cost. It is expected that the progress of 4K upgrade in the next few years will be very slow before the completion of 5g construction.

From fixed focus to high-power zoom: Security lens can be divided into fixed focus and zoom. At present, the mainstream is still fixed focus, but the zoom lens accounted for 30% of the market in 2016 and will increase to more than 40% by 2020. Usually, 3x zoom is enough for use, but higher zoom is still required for longer distance monitoring.

Large aperture solves the application of low light environment: because the security lens often needs to be used in low light environment, the requirement for large aperture is much higher than that of mobile phone lens. Although infrared imaging can also be used to solve the problem of night imaging, it can only provide black-and-white video. Therefore, large aperture combined with highly sensitive RGB CMOS is the fundamental way to solve the application in low light environment. At present, the mainstream lens is enough to cope with the indoor environment and the outdoor environment during the day. For the night environment, large aperture lenses of star light level (F1.6) and black light level (F 0.8) have been developed.

Today, with the more and more extensive application of electronic technology, optical lens, as the "eye" of machine, is also expanding many new application fields. In addition to the three major business markets of security, mobile phone and vehicle, as the main acquisition component of optical signal, optical lens has become an important component of emerging terminal electronic products such as AI recognition, projection video, smart home, virtual reality and laser projection. For different electronic devices, the optical lenses are also slightly different in shape and technical standards.