ZHANG Kun,QU Zheng,ZHONG Xing,et al.Design of 30× zoom optical system with light weight and compact size[J].Optics and Precision Engineering,2022,30(11):1263-1271.
ZHANG Kun,QU Zheng,ZHONG Xing,et al.Design of 30× zoom optical system with light weight and compact size[J].Optics and Precision Engineering,2022,30(11):1263-1271. DOI: 10.37188/OPE.20223011.1263.
Design of 30× zoom optical system with light weight and compact size
Developing a lightweight and compact mechanical compensation zoom optical system with a high zoom ratio is challenging. Therefore, this study investigates a design method for a lightweight and compact mechanical compensation zoom optical system with high magnification. First, to simplify the correction of chromatic and spherical aberration in the high magnification zoom optical system, the focal power distribution principle of the mechanical compensation zoom optical system is analyzed theoretically. Then, the “+, -, +, +” optical focal length distribution method with smooth root exchange and fixed aperture to change the F-number is proposed to realize a lightweight and compact design. In addition, the joint solution method using parameter setting and optical design software is adopted to solve the initial structure parameters quickly and effectively. Finally, a lightweight and compact continuous zoom optical system with a high zoom ratio is designed using spherical lenses based on the proposed design method. The maximum diameter of the zoom optical system is 67 mm, and the total length is 190 mm. In addition, the zoom system is also characterized by good imaging quality and no inflection point in the zoom curves.
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