Design of Dual-Vision Double Telecentric Optical System Based on Machine Vision

Wenwei Ye; Tianfu Zhou; Jinxuan Huang; Feng Lin

doi:10.3788/LOP57.012202

Laser & Optoelectronics Progress, Volume. 57, Issue 1, 012202(2020)

Design of Dual-Vision Double Telecentric Optical System Based on Machine Vision

Wenwei Ye^*, Tianfu Zhou, Jinxuan Huang, and Feng Lin^**

2Key Laboratory of Medical Optoelectronic Science and Technology, Ministry of Education, College of Optoelectronics and Information Engineering, Fujian Normal University, Fuzhou, Fujian 350007, China

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Figures & Tables(15)

Fig. 1. Diagram of common solution

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Fig. 2. Diagram of solution in this paper

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Fig. 3. System initial structural diagram

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Fig. 4. Outline drawing of optical system

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Fig. 5. MTF plots when magnification is -0.1375

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Fig. 6. MTF plots when magnification is -0.275

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Fig. 7. System distortion diagram when magnification is -0.1375

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Fig. 8. System distortion diagram when magnification is -0.275

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Fig. 9. Spot diagrams when magnification is -0.1375

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Fig. 10. Spot diagrams when magnification is -0.275

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Fig. 11. Monte Carlo simulation results. (a) Most influential tolerance and its position in structure 1 (magnification is -0.1375); (b) most influential tolerance and its position in structure 2 (magnification is -0.275); (c) MTF curves obtained by Monte Carlo simulation of structure 1 (magnification is -0.1375); (d) MTF curves obtained by Monte Carlo simulation of structure 2 (magnification is -0.275); (e) distortion curves obtained by Monte Carlo simulation of structure 1 (magnification is -0.1375); (f

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Table 1. Imaging chip parameters
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Table 1. Imaging chip parameters
Diagonallength /mm Total numberof pixels Pixel size /(μm×μm) Effectivearea /(mm×mm)
11 1920×1200 4.8×4.8 9.216×5.76

Table 2. System design parameters
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Table 2. System design parameters
Parameter Index
Magnification -0.1375,-0.275
Object field of view /mm 80,40
Image field of view /mm 11
Working distance /mm 130
Distortion /% <0.2
Telecentricity /(°) <0.1

Table 3. System telecentricity
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Table 3. System telecentricity
Magnification Telecentricity /(°)
0.3H 0.5H 0.8H 1H
-0.1375 0.031 0.041 0.024 0.020
-0.375 0.043 0.060 0.040 0.025

Table 4. Tolerance range of optical system

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Table 4. Tolerance range of optical system

Tolerance position	Parameter	Value
	Radius of curvature	3
Surface	Thickness /mm	0.02
	Surface tilt angle /(°)	0.013
	Irregularity	0.25
	Component tilt angle /(°)	0.013
Element	Refractive index /%	0.03
	Abbe coefficient	0.5

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Wenwei Ye, Tianfu Zhou, Jinxuan Huang, Feng Lin. Design of Dual-Vision Double Telecentric Optical System Based on Machine Vision[J]. Laser & Optoelectronics Progress, 2020, 57(1): 012202

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