Line structured light calibration system based on planar complementary target

Yusheng ZHAI; Ben YANG; Zhifeng ZHANG; Rui WANG; Haiqi XI; Shangshang LI; Lijie GENG; Ruiliang ZHANG; Cuifang KUANG

doi:10.5768/JAO202344.0203002

Journal of Applied Optics, Volume. 44, Issue 2, 371(2023)

Line structured light calibration system based on planar complementary target

Yusheng ZHAI1...2, Ben YANG1,2, Zhifeng ZHANG1,2,*, Rui WANG1,2, Haiqi XI1,2, Shangshang LI1,2, Lijie GENG1,2, Ruiliang ZHANG1,2, and Cuifang KUANG23 |Show fewer author(s)

Author Affiliations

¹Henan Key Laboratory of Magnetoelectronic Information Functional Materials, School of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, China

²Zhengzhou Key Laboratory of Information Optics and Photoelectric Technology, School of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, China

³State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China

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Fig. 1. Schematic diagram of planar complementary target system device

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Fig. 2. Mathematical model of projection imaging with monocular camera

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Fig. 3. Sub-pixel points sampling of eccentric ellipse edge

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Fig. 4. Eccentric error compensation model of geometrical relationship of concentric circle projection

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Fig. 5. Fluctuation range of eccentric error of inner and outer circles

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Fig. 6. Plane fitting of line structured light

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Fig. 7. Measurement of large-size workpiece in complex environment

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Table 1. Parameters of planar complementary target system device

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Table 1. Parameters of planar complementary target system device

参数	数值	参数	数值
电压/V	24	LED 数量/颗	62
基板尺寸/mm	450×360	激光直写精度/mm	0.001
壳体尺寸/mm	480×400×40	高照强度/lux	100 000±2 000
棋盘格边长/mm	45	可调节高度/mm	0～1 500
内圆直径/mm	30	相邻两圆圆心距/mm	90
X、Y方向可调节角度/（°）	0～360	Z方向可调节角度/（°）	−45～45

Table 2. Comparison of calibration results between proposed method and traditional method
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Table 2. Comparison of calibration results between proposed method and traditional method
参数传统方法标定值所提方法标定值
$f_{x}$ 346.636 0 347.113 3
$f_{y}$ 343.483 7 344.163 7
u₀ 633.887 6 634.137 1
v₀ 515.955 3 514.325 8
$RMS$ 0.213 7 0.032 6

Table 3. Comparison of measurement results of grinding wheels

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Table 3. Comparison of measurement results of grinding wheels

测量序号	标准值/mm	人工测量值/mm	系统测量值/mm
1	799.998	799.998	799.994 2
2		800.001	799.992 7
3		799.898	800.005 1
4		799.899	799.993 5
5		800.001	800.004 6
6		799.998	799.995 3
7		799.999	800.004 8
8		800.098	799.993 9
最大误差值/mm		0.100 0	0.007 1
误差均值/mm		0.038 2	0.005 1
均方差/mm		0.064 1	0.005 7

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Yusheng ZHAI, Ben YANG, Zhifeng ZHANG, Rui WANG, Haiqi XI, Shangshang LI, Lijie GENG, Ruiliang ZHANG, Cuifang KUANG. Line structured light calibration system based on planar complementary target[J]. Journal of Applied Optics, 2023, 44(2): 371

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