Compact zoom optical system with multiple moving groups sharing travel path

Jiayi XIE; Zhile WANG; Donghui YU; Zeqi WANG; Liwen HUANG

doi:10.37188/OPE.20253311.1713

Optics and Precision Engineering, Volume. 33, Issue 11, 1713(2025)

Compact zoom optical system with multiple moving groups sharing travel path

Jiayi XIE¹, Zhile WANG^1、*, Donghui YU¹, Zeqi WANG², and Liwen HUANG¹

¹Research Center for Space Optical Engineering， School of Astronautics， Harbin Institute of Technology， Harbin5000， China

²State Key Laboratory of Dynamic Optical Imaging and Measurement， Changchun Institute of Optics，Fine Mechanics and Physics， Chinese Academy of Sciences， Changchun130033， China

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Figures & Tables(12)

Fig. 1. Schematic diagram of multiple moving groups zoom optical system

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Fig. 2. Schematic diagram of Gaussian structure for zoom system

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Fig. 3. Schematic diagram of compact zoom optical system with multiple moving groups sharing travel path

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Fig. 4. Condition of moving groups sharing travel path

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Fig. 5. MTF curves of zoom optical system

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Fig. 6. Distortion curves of zoom optical system

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Fig. 7. Relative illumination of zoom optical system

Fig. 8. Zoom curves

Table 1. Design index of the zoom optical system
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Table 1. Design index of the zoom optical system
Parameters Value
F-number 2.4-4.5
Image height 8.49 mm
Working spectrum 435-650 nm
Zoom ratio 3
Effective focal length 23-69 mm
Total track length $\leq 69 m m$
Mass <30 g
Back focal length $\geq 1 m m$

Table 2. Focal lengths of groups in Gaussian structure
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Table 2. Focal lengths of groups in Gaussian structure
Group Focal length/mm
$G_{0}$ -49.69
$G_{1}$ 16.37
$G_{2}$ 264.34
$G_{3}$ -10.09
$G_{4}$ 35.97

Table 3. Component spacing in Gaussian structure
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Table 3. Component spacing in Gaussian structure
Component spacing $d_{01}$ $d_{12}$ $d_{23}$ $d_{34}$ $d_{4 p}$
Long focal length 4.75 10.72 2.29 19.82 30.41
Middle focal length 18.67 7.03 4.73 14.78 22.79
Short focal length 38.79 5.94 6.41 5.09 11.77

Table 4. Tolerance limits of proposed zoom optical system

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Table 4. Tolerance limits of proposed zoom optical system

Tolerance type	Tolerance range
Radius of lens surface/fringe	±3
Thickness of lens/mm	±0.02
Surface decenter/mm	±0.01
Surface tilt/（″）	±60
Element decenter/mm	±0.02
Element tilt/（″）	±60
Irregularity of lens surface/fringe	±0.3
Refractive index	±0.001
Abbe number/%	±0.5

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Jiayi XIE, Zhile WANG, Donghui YU, Zeqi WANG, Liwen HUANG. Compact zoom optical system with multiple moving groups sharing travel path[J]. Optics and Precision Engineering, 2025, 33(11): 1713

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