Huawei’s debut? Next year, there will be black technology to take pictures. Let’s know about the liquid lens!

With the arrival of September, the second half of the wave of new airplanes will officially open in 2020. A large amount of news will flow out of the flagship such as iPhone 12, Xiaomi 10t pro, mate 40, and one plus 8t. It seems that we only need to prepare money for sale. However, although the configuration in the second half of the year has been determined, major manufacturers are making preparations for the flagship next year, especially in the field of camera. From the supply chain intelligence, the major mobile phone manufacturers will work hard on the camera next year to surprise fans. < / P > < p > among these rumors, one piece of news is particularly remarkable: in the mate 40 series in the second half of the year, Huawei will take the lead in using liquid lens to improve the photographing performance of mobile phones. Some sources said that the future Huawei P50 series will also take the liquid lens technology as the main selling point. In April 2020, the State Intellectual Property Office approved a patent of Huawei on the module of liquid lens. In the Patent Description, Huawei said that the module can make the motor driving the liquid lens meet the performance requirements of automatic focusing and optical anti shake, and improve the motor’s abnormal performance such as impact and drop Reliability under working conditions. < / P > < p > we can see that liquid lens will be the future research direction of Huawei’s photography. But what has been said and what is the liquid lens? Why should Huawei use it? < / P > < p > as we all know, the optical zoom of camera is completed through the internal lens group movement, and the lens and its moving range determine the zoom distance. However, compared with the huge size of the SLR Lens, the mobile phone often does not have enough space for zoom adjustment. In fact, the zoom function of early mobile phones is digital cutting, and the algorithm is used to make up for the details, which is often called lossy zoom. < / P > < p > in order to solve the zoom problem of mobile phones, manufacturers have also made every effort, such as increasing the number of lenses, or simply installing a special long focus lens – which is the origin of dual camera. But even if it’s dual camera, the “native focus” that the mobile phone can capture is still limited, and most scenes still need to be solved by lossy zoom. < p > < p > of course, there are also manufacturers of toutie. Samsung is one of them. It has put forward a very crude plan: add a huge camera to the mobile phone to win the zoom space. Although the results show that Samsung’s zoom phone Galaxy zoom K has achieved 10 times lossless optical zoom in 2014, its shape is not popular in the market. < / P > < p > at a time when everyone was crazy about adding cameras, oppo stood up at the MWC conference in 2017 and proposed a creative design – periscope zoom scheme. Today, all mobile phones on the market that support more than five times lossless zoom have adopted the periscope zoom scheme. To put it bluntly, periscope zoom means “changing thickness for width”. Through a prism, the incoming light is placed horizontally, and the activity limit of the mirror group changes from the thickness of the mobile phone to the width of the mobile phone. < / P > < p > but this year, periscope lens has also begun to encounter a bottleneck: today’s 50x zoom still relies on multiple cameras with different focus segments to complete the “picture relay” for lossy zoom; the periscope camera can only give 10 times lossless zoom at most. Multiple fixed focus cameras + periscope lens make the camera volume expand rapidly, threatening the living space of other components. < / P > < p > in order to make the zoom performance of P40 double that of P30 and reach 100 times of digital zoom, Huawei specially transforms the traditional periscope zoom, and puts three sets of prisms into the module, and the light reaches the sensor after five refractions. Although the goal of 100 times is finally achieved, the utilization of mobile phone space has reached the limit. Moreover, the attenuation of light caused by periscope zoom is inevitable. The more media the light passes through, the greater the loss of light. In addition, due to the transverse optical path, the sensor at the end point has changed from “lying” to “vertical”, which limits the size of the sensor. This year’s popular “100 million pixel sensor” will not be used in periscope lens. < / P > < p > from the S20 ultra disassembly fragment of ifixit, we can see that the volume of the 100 million pixel lens + sensor in the rear right is equivalent to that of the periscope lens in the left rear, so it is impossible to give a large area of sensor “horizontal” space. In fact, the current periscope sensor is only 13 million pixels at most. < / P > < p > although periscope sensor brings us 100 times zoom and 10 times lossless zoom, its challenge to the internal volume of mobile phone has reached the limit. Only by switching the track can we bring new possibilities for mobile phone photographing. < / P > < p > the reason why the traditional zoom means “come to an end” is that multiple fixed lenses have to be pushed and pulled back and forth. If the lens does not move, but can change its radian and then change the light path, will the zoom problem be solved? < / P > < p > in fact, the principle of liquid lens is not complicated. It entered our eyes earlier than the traditional lens. The reason why the human eye can adjust the focal length seamlessly is that the ciliary muscle automatically adjusts the radian of the lens. The reason why people are short-sighted is also because of the spasm caused by the long-term contraction of the ciliary muscle, and the muscle can’t normally relax to see the distance. This is the principle of liquid lens, which changes the curvature of lens formed by liquid crystal through voltage, so as to realize the change of focal length. In 2013, the liquid lens has been made to be about 1 cm in size, and can achieve a clear imaging of 400 focal length. In addition to liquid crystal, the deformation of oil and water can also achieve refraction effect: through the application of voltage, the oil layer can form a convex lens to produce a concentrating effect. However, according to Xiaolei’s information, the applied voltage is generally around 50v-100v, and there is little hope that it can be realized on a mobile phone. In addition to liquid crystal and oil, the exploration directions of liquid lens are also very diverse: adjusting the focal length by high-frequency oscillation of liquid droplets, directly adjusting the curvature of liquid by extrusion, and adjusting the focal length by applying pressure on the film by liquid In fact, Huawei’s patents are not new. In 2010, Samsung, Sony and Canon had patents related to liquid lens, and the rumor that liquid lens will be used on mobile phones can even be traced back to 2006. < p > < p > the appearance of liquid lens can well alleviate the volume occupied by lens in the process of traditional optical zoom, especially when small lens is needed, such as intestinal endoscopy, liquid lens plays a very powerful role. The University of California has used liquid lenses to perform cholecystectomy for patients; liquid lenses have also been used in miniature scanners. However, on mobile phones, the development space of liquid lens is still limited. Whether the method of changing the liquid curvature can be effectively realized in the small space inside the mobile phone, and its high cost is not mentioned. The dispersion and distortion of liquid lens are relatively serious, and the optical characteristics of liquid lens are far behind the mature lens group. In a short time, we may not see it. < / P > < p > it can be said that in recent years, the endless rumors of “liquid lens” also express people’s optimistic about the future of liquid lens: small size, no active components, wide zoom. However, although the ideal is beautiful, the reality is very skinny. From the current point of view, the zoom lens is still a VIP in the niche market, and it is difficult to apply to the mobile phone with such a wide range of uses. Although Xiaolei supports the research on liquid lens by major mobile phone manufacturers, Xiao Lei also appeals to the people who eat melons to keep calm and wait for good news patiently. Xiaomi new machine real machine exposure center dig hole screen design or high color thousand yuan machine