Design of laser parameter measurement system based on diffuse reflection imaging

Yilun Cheng; Fengfu Tan; Feng He; Zaihong Hou; Laian Qin; Hao Wang; Zhigang Huang; Decheng Wu

doi:10.3788/IRLA20210921

Infrared and Laser Engineering, Volume. 51, Issue 9, 20210921(2022)

Design of laser parameter measurement system based on diffuse reflection imaging

Yilun Cheng^1,2,3, Fengfu Tan^1,3, Feng He^1,3, Zaihong Hou^1,3, Laian Qin^1,3, Hao Wang^1,3, Zhigang Huang^1,3, and Decheng Wu^1,3

Author Affiliations

¹Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China

²University of Science and Technology of China, Hefei 230026, China

³Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, China

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Figures & Tables(10)

Fig. 1. Measurement system structure diagram

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Fig. 2. Schematic diagram of diffuse reflection target surface

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Fig. 3. Spot image before and after distortion correction. (a) Spot image before distortion correction; (b) Spot image after distortion correction

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Fig. 4. Schematic diagram of system tracking accuracy test

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Fig. 5. Curve of spot centroid position under different powers

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Fig. 6. Relationship between ADU and attenuation system transmittance

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Table 1. Diffuse target surface hemispherical reflectance data
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Table 1. Diffuse target surface hemispherical reflectance data
Wavelength/nm Directional hemispherical reflectance
1030 0.918
1040 0.918
1050 0.919
1060 0.919
1064 0.920
1070 0.920

Table 2. Position coordinates of feature points after distortion correction

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Table 2. Position coordinates of feature points after distortion correction

Actual coordinate in Y direction/pixel	Actual coordinate inX direction/pixel	Ideal coordinate in Y direction/pixel	Ideal coordinate in X direction/pixel	Y direction deviation/pixel	X direction deviation/pixel
132.92	167.39	132.54	167.39	0.38	0
133.28	852.32	135.93	854.68	−3.65	−2.36
818.89	167.82	820.93	169.16	−2.04	−1.34
817.74	852.38	820.93	854.68	−3.19	−2.3

Table 3. Coordinate data of spot centroid position

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Table 3. Coordinate data of spot centroid position

Laser output power/W	First location coordinates (X-direction)/mm	Second location coordinates (X-direction)/mm	Deviation/mm	Third location coordinates (X-direction)/mm	Deviation/mm
≈3000	−19.03	−29.24	10.21	−39.28	10.04
≈1500	−18.93	−29.04	10.10	−39.05	10.01
≈1000	−18.92	−29.01	10.09	−39.03	10.02
≈560	−18.84	−28.90	10.06	−38.89	9.99

Table 4. Results of laser power measurement

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Table 4. Results of laser power measurement

Laser output power/W	Attenuation system transmittance	Measured laser power/W	Uncertainty of measurement
1870	1.66E-05	1870	0
1340	2.72E-05	1400	4.29%
1220	4.13411E-05	1120	8.93%
620	9.26837E-05	584	6.20%

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Yilun Cheng, Fengfu Tan, Feng He, Zaihong Hou, Laian Qin, Hao Wang, Zhigang Huang, Decheng Wu. Design of laser parameter measurement system based on diffuse reflection imaging[J]. Infrared and Laser Engineering, 2022, 51(9): 20210921

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