CQCR Precision Optical Technology Corporation is a leading enterprise in precision optical technology in the world, and its market share in micro acoustics, electromagnetic transmission, precision structures, radio frequency antennas, etc. ranks first in the world.
In 2009, the company successfully acquired the Swiss Optical Technology Company and obtained WLO technology. At this point, CQCR began to dabble in free-form/aspheric micro optical solutions with highly refined structures.
In 2010, CQCR acquired 32% of the equity of Danish enterprises with wafer level glass technology, and completed all equity acquisitions in 2015.
At present, CQCR has built six optical design and R&D centers around the world, focusing on the development and innovation of optical design. In addition to providing plastic lenses, CQCR is also committed to the development of glass plastic hybrid lenses and layout 3D perception technology.
In 2017, the company developed a unique wafer level WLG glass lens and glass plastic hybrid lens technology.
In terms of patents, the company has more than 2500 core patents in the optical field, ranking first in the world in terms of number, covering many fields such as high-end optical lenses, car specification lenses, iris recognition, etc.
At present, glass lens has three manufacturing processes, namely, molding, WLO wafer level optical element technology and WLG wafer level glass technology.
Among the three, Wafer Level Glass (WLG) technology is the most advanced technology with multiple advantages. First, it can provide flexible optical design and upgrade roadmap. With smaller size, it can cope with the trend of thinner and thinner mobile phones. Secondly, it has excellent optical properties and thermal stability; Third, the manufacturing cost is lower.
At present, CQCR is the only company that has mastered the mass production technology of WLG wafer optical glass lenses worldwide
At present, CQCR has built two wafer level WLG aspheric glass mold manufacturing centers (one in China and one in Europe). Mainly engaged in R&D and manufacturing of nano scale ultra precision optical molds.
WLG technology, which is unique in the world, has obvious advantages over other glass forming technologies in terms of optical high-precision and other extreme performance. Compared with plastic lenses, glass lenses have better performance in refractive index, dispersion, reliability, thermal stability, etc., which can effectively solve the problems and limitations faced by plastic lenses at present.
WLG technology has achieved extensive coverage in many fields and will lead the development of on-board optics
Based on the advantages of WLG technology layout and mass production of glass lenses, the company’s products have been applied to intelligent devices such as unmanned aerial vehicles, vehicles, AR/VR devices, and started to expand industrial fields such as semiconductor production and detection, and downstream application layout such as medical equipment.
In terms of smart phones, WLG glass plastic hybrid lens has been successfully installed in the world’s first high-end model with a 1-inch bottom sensor, as well as multiple models in the Redmi K series and Xiaomi Civi series, and gradually covers the middle and high-end Android phone and UAV markets.
In terms of intelligent vehicle, it can provide intelligent driving lens and camera module, intelligent cockpit lens and camera module, intelligent driving laser radar optical components and other series of products. The layout in the vehicle field has been preliminarily completed.
WLG technology helps significantly improve the expressiveness of car lenses:
Aspheric glass is a key component in the automatic driving related lenses above L3 level.
The aspherical glass made with WLG technology can realize the “W” or “M” shaped surface glass, bringing higher freedom to the design of vehicle lens.
In theory, one WLG glass lens can replace one GMO+one G (spherical glass). The use of WLG glass lens can reduce the cost of lens materials, reduce lens size, increase aperture, improve performance, and make the lens have better performance.
Higher performance means higher accuracy and safety, which is extremely important for the development of intelligent vehicles.
In addition, WLG technology can better meet the requirements of laser radar for high stability of lens:
At present, the common aspheric glass manufacturing process on the market makes it difficult to produce large aperture (more than 35mm) lenses that meet the requirements of lidar lenses. Mold processing is difficult, and the product stability is not high.
The unique WLG aspherical glass manufacturing technology of CQCR can further support the requirement of high stability compared with traditional technology, and produce aspherical glass with high dimensional freedom, higher eccentric core and surface accuracy with high efficiency and high yield.
Five Core Technologies of WLG Ultra precision Optical Mold Design and Manufacturing
The design and manufacturing capability of WLG ultra precision optical mold is supported by five core technologies.
Tool path design:
The independently developed tool path compensation algorithm can effectively improve the machining accuracy of the tool. With other process technologies, the PV of the complex optical surface of the mold can reach 100nm, and the roughness (the small distance between the machined surfaces and the roughness of the small peaks and valleys) can reach the mold accuracy level of 2nm, which improves the mold machining accuracy.
Point location:
Through the self-developed processing equipment control system, curved surface processing array algorithm, in-situ measurement and positioning technology, the center positions of more than 100 acupoints can be calculated and located on a single mold at one time, and the positioning accuracy can reach 200nm, greatly improving the positioning efficiency and positioning accuracy.
Turning:
Through the independently developed processing equipment control system, spindle motion algorithm and turning tool path compensation algorithm, the motion parameters of the ultra precision machine tool axis are dynamically adjusted and the compensation tool path is optimized to improve the processing accuracy. The mold cam eccentricity can reach 200nm, the flatness can reach 400nm, and the mold positioning accuracy is improved.
Grinding:
Through the independently developed processing equipment control system, spindle motion algorithm, shrinkage algorithm and grinding tool path compensation algorithm, the motion parameters of the ultra precision machine tool axis are dynamically adjusted, the mold surface is compensated and analyzed, and the compensation tool path is optimized. The mold surface accuracy can reach 100nm, which improves the mold surface accuracy.
Ultra precision surface treatment:
Through the self-developed processing equipment control system and electron beam surface processing algorithm and other ultra precision surface processing technologies, the mold surface and surface state can be calibrated. With other processes, the precision of the complex optical surface of the mold can reach 100nm, and the roughness can reach the accuracy level of 2nm, which improves the mold surface precision and surface quality.