| Citation: | LI Yuzhe, HU Yuan, HUO Jiaqi, ZHANG Youyu, GAO Tianyuan. Design of medium wave infrared zoom optical system with low tolerance sensitivity and large zoom ratio and extremely short total length[J]. Chinese Optics. doi: 10.37188/CO.2024-0095
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In response to the current problem of difficulty in achieving extremely short total length and low sensitivity in medium wave infrared zoom systems under conditions of large zoom ratio and long focal length, this paper adopts a reasonable allocation of aspherical and diffractive surfaces, as well as a low sensitivity design method for independent components. By reducing the aberration of each component, the goal of reducing system tolerance sensitivity is achieved, achieving system simplification and miniaturization, and improving the feasibility of engineering applications. Design a low sensitivity medium wave infrared zoom optical system with a total length of only 337mm and no need for folding optical paths. The system achieves a 30x zoom ratio and continuous zoom with a long focal length of 30-900mm. The system has advantages such as large zoom ratio, long focal length zoom, extremely short total length, low sensitivity, and good image quality within the full focal length range. It has significant application advantages for military applications such as target recognition, tracking, and detection in narrow spaces.
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