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The optical lens is an essential part of the machine vision system, which directly affects the quality of the image and the implementation and effect of the algorithm. Optical lens can be divided into short focus lens, medium focus lens and long focus lens from focal length. From the field of view, there are wide angle, standard and telephoto lenses. Structurally, there are fixed aperture fixed focus lens, manual aperture fixed focus lens, automatic aperture fixed focus lens, manual zoom lens, automatic zoom lens, automatic aperture electric zoom lens, electric three-variable (aperture, focal length and focus can be changed) lens, etc. Globally, during 1950, with the development of the first zoom lens for cameras in the United States, the global optical lens industry gradually entered its infancy. In the middle of the 19th century, Germany and Japan, two countries with developed industries, took the lead in developing and manufacturing lenses, giving birth to optical component giants such as Lycra and Carl Zeiss. By the 1990 s, Canon developed the world's first in-focus camera lens with IS anti-shake function, and the industry gradually entered a growth stage. In the 21st century, the production scale of optical components is growing rapidly, the consumption of optical lenses is also expanding, and the industry has entered a stage of rapid development. Optical lenses are an important part of the optoelectronic industry chain. The upstream industry chain consists of suppliers of optical raw materials such as optical glass and optical plastics and suppliers of optical components such as lenses and filters. Downstream is a variety of products that combine optoelectronic technology with video surveillance, artificial intelligence, intelligent manufacturing, Internet of Things, industrial inspection, intelligent vehicle, laser display and other fields, with a wide range of applications.