Design of Lightweight and Miniaturized Zoom Objective Optical System with Wide Band

Yumei Chang; Jinsong Wang

doi:10.3788/AOS221552

Journals >Acta Optica Sinica >Volume 43 >Issue 8 >Page 0822029 > Article

Acta Optica Sinica
Vol. 43, Issue 8, 0822029 (2023)

Design of Lightweight and Miniaturized Zoom Objective Optical System with Wide Band

Yumei Chang^1、2 and Jinsong Wang^1、2、*

Author Affiliations

¹School of Opto-Electronic Engineering, Changchun University of Science and Technology, Changchun 130022, Jilin, China

²Zhongshan Institute, Changchun University of Science and Technology, Zhongshan 528437, Guangdong, China

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DOI: 10.3788/AOS221552 Cite this Article Set citation alerts

Yumei Chang, Jinsong Wang. Design of Lightweight and Miniaturized Zoom Objective Optical System with Wide Band[J]. Acta Optica Sinica, 2023, 43(8): 0822029 Copy Citation Text

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Fig. 1. Zoom and compensation movement diagram of four-group three-linkage optical system

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Two-dimensional diagrams of optical systems. (a) Short focal length (focal length is 25 mm); (b) secondary short focal length (focal length is 55 mm); (c) middle focal length (focal length is 135 mm); (d) long focal length (focal length is 250 mm)

Fig. 2. Two-dimensional diagrams of optical systems. (a) Short focal length (focal length is 25 mm); (b) secondary short focal length (focal length is 55 mm); (c) middle focal length (focal length is 135 mm); (d) long focal length (focal length is 250 mm)

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Fig. 3. MTF curves of zoom optical system in 0.48-0.68 μm. (a) Short focal length (focal length is 25 mm); (b) secondary short focal length (focal length is 55 mm); (c) middle focal length (focal length is 135 mm); (d) long focal length (focal length is 250 mm)

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Fig. 4. MTF curves of zoom optical system in 0.80-0.90 μm. (a) Short focal length (focal length is 25 mm); (b) secondary short focal length (focal length is 55 mm); (c) middle focal length (focal length is 135 mm); (d) long focal length (focal length is 250 mm)

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Fig. 5. Spot diagrams of zoom optical system in 0.48-0.68 μm. (a) Short focal length (focal length is 25 mm); (b) secondary short focal length (focal length is 55 mm); (c) middle focal length (focal length is 135 mm); (d) long focal length (focal length is 250 mm)

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Fig. 6. Spot diagrams of zoom optical system in 0.80-0.90 μm. (a) Short focal length (focal length is 25 mm); (b) secondary short focal length (focal length is 55 mm); (c) middle focal length (focal length is 135 mm); (d) long focal length (focal length is 250 mm)

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Fig. 7. Cam curve of zoom lens

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Parameter	Specification
Zoom ratio	1-10
Work wavelength /μm	0.48-0.68，0.80-0.90
Operating range /km	≥2
Horizontal field angle /（°）	≥20（detection） ≥2（recognition）
Overall length /mm	≤250
F-number	≤7

Table 1. Related optical indicators

Parameter	Value
Parameter	EFL：25 mm	EFL：55 mm	EFL：135 mm	EFL：250 mm
F-number	5	5	5	6.5
Field of view /（°）	13.39	6.25	2.60	1.38
Relative illumination	≥0.56	≥0.45	≥0.53	≥0.40
Distortion /%	-0.093	-0.812	-1.390	0.819

Table 2. Optical parameters of optical system at different focal lengths

Focus length /mm	25	55	135	250
Focusing amount /mm	+0.26	+0.26	+0.26	+0.26

Table 3. Focusing amount in 0.80-0.90 μm at different focal length position

Yield rate /%	MTF of short focal length	MTF of secondary short focal length	MTF of middle focal length	MTF of long focal length
90	>0.278	>0.312	>0.375	>0.339
80	>0.324	>0.362	>0.440	>0.391
50	>0.417	>0.452	>0.533	>0.472
20	>0.511	>0.558	>0.650	>0.563
10	>0.564	>0.639	>0.717	>0.629

Table 4. Tolerance analysis results

Yumei Chang, Jinsong Wang. Design of Lightweight and Miniaturized Zoom Objective Optical System with Wide Band[J]. Acta Optica Sinica, 2023, 43(8): 0822029

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