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The development trend of optical imaging systems today is lightweight, large zoom, and low power consumption. The traditional zoom imaging system is composed of glass lens, mechanical control module and image sensor. Its working principle is to realize zooming by mechanically adjusting the distance between each lens group.The shortcomings of traditional zoom imaging systems are its complex structure, inconvenient operation and discrete variable multiples. The combination of adjustable focus lens and glass lens makes the zoom optical imaging system lighter and easier to obtain image detail information. In this paper, we propose a variable magnification imaging system composed of a combination of a liquid crystal lens and a glass lens. This variable magnification imaging system consists of an optical lens group, a liquid crystal lens array and a CMOS detector. The optical lens group is a telephoto lens composed of traditional glass lenses.The liquid crystal lens is a liquid crystal device that electronically controls the focal length. The object is first imaged through the optical lens group, the liquid crystal lens array then images the image formed by the optical lens group, and finally the image is received by the CMOS. This is the imaging principle of this system;By adjusting the voltage applied to the liquid crystal lens array to adjust its focal length, and then moving the CMOS mechanically, zoom imaging can be achieved.
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