Laser Beam Pointing Control Based on Differential Dual-View Imaging

Hongwei Yang; Yimian Du; Lidong Lü; Wei Tao; Junguo Lu; Hui Zhao

doi:10.3788/CJL202148.1705002

Chinese Journal of Lasers, Volume. 48, Issue 17, 1705002(2021)

Laser Beam Pointing Control Based on Differential Dual-View Imaging

Hongwei Yang^1,2, Yimian Du², Lidong Lü², Wei Tao¹, Junguo Lu¹, and Hui Zhao^1、*

Author Affiliations

¹School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

²School of Electrical and Information Engineering, Anhui University of Technology, Ma'anshan, Anhui 243032, China

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Figures & Tables(10)

Fig. 1. Optical path principle of DVLTDS

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Fig. 2. DVLTDS model designed in Zemax software

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Fig. 3. Experimental device of DVLTDS

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Fig. 4. Calibration data curve. (a) Calibration results of DVLTDS; (b) calibration results of LTDS

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Fig. 5. Calibrated error curve. (a) Calibrated errors of DVLTDS; (b) calibrated errors of LTDS

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Fig. 6. Repeatability curves at closer point, zero point, and further point with and without differential dual-view imaging. (a) Repeatability results with DVLTDS when the object is located at a closer point; (b) repeatability results with LTDS when the object is located at a closer point; (c) repeatability results with DVLTDS when the object is located at a zero point; (d)repeatability results with LTDS when the object is located at a zero point; (e) repeatability results with DVLTDS when the object is located at a further point; (f) repeatability results with LTDS when the object is located at a further point

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Fig. 7. Nonlinearity errors with and without differential dual-view imaging. (a) Nonlinearity errors of DVLTDS; (b) nonlinearity errors of LTDS

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Table 1. Values of parameters
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Table 1. Values of parameters
Parameter Value
l /mm 145.600
l' /mm 39.5149
β /(°) 53.36
γ /mm 79.5000

Table 2. Main devices used in DVLTDS
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Table 2. Main devices used in DVLTDS
Device Type Parameter
CCD TCD2566BFG Resolution: 5.25 μm
Ceramic gauge block Size: 20 mm×10 mm×2mm
Collimated laser Power: 5 W
Receiver lens Focus: 31.0788 mm
Rational device PRM/M(Thorlab)

Table 3. Repeatability error and STD at closer point, zero point, and further point
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Table 3. Repeatability error and STD at closer point, zero point, and further point
Position Repeatability error /μm STD /mm
DVLTDS LTDS DVLTDS LTDS
Closer point ±4.6375 ±1228.8 0.0035 0.8516
Zero point ±3.8836 ±791.6 0.0030 0.9567
Further point ±4.3520 ±1402.1 0.0034 0.5476

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Hongwei Yang, Yimian Du, Lidong Lü, Wei Tao, Junguo Lu, Hui Zhao. Laser Beam Pointing Control Based on Differential Dual-View Imaging[J]. Chinese Journal of Lasers, 2021, 48(17): 1705002

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