Infrared and Laser Engineering, Volume. 51, Issue 2, 20210890(2022)
Measurement of translucent coating thickness based on pulsed thermography
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Fig. 2. Analytical surface temperature of samples with different coating thickness vs time in double logarithm scale
Fig. 3. Coating thickness vs peak time of surface temperature in logarithm scale
Fig. 6. Simulation surface temperature of samples with different coating thickness vs time in double logarithm scale
Fig. 7. Coating thickness vs simulation peak time of surface temperature in logarithm scale
Fig. 10. Experimental surface temperature of samples with different coating thickness vs time in double logarithm scale
Fig. 11. Thickness vs experimental peak time in double logarithm scale
Table 1. Parameters used in the model
View tableView in ArticleTable 1. Parameters used in the model
Density/ $\mathrm{k}\mathrm{g}\cdot{\mathrm{m} }^{-3}$ Heat capacity/ $\mathrm{J}\cdot(\mathrm{k}\mathrm{g}\cdot \mathrm{K}$ Thermal conductivity/ $\mathrm{W}\cdot(\mathrm{m}\cdot \mathrm{K}$ Coating 1200 1000 0.2 Substrate 7850 475 80
Table 2. Measurement result of coating thickness
View tableView in ArticleTable 2. Measurement result of coating thickness
Thickness by micrometer/ μm Thickness by thermography/ μm Difference 1 103 99.7 3.3% 2 136 139.2 2.3% 3 158 160.6 1.6% 4 197 189.4 4.0%
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Tao He, Zhonghua Shen, Fei Chen, Li Chen. Measurement of translucent coating thickness based on pulsed thermography[J]. Infrared and Laser Engineering, 2022, 51(2): 20210890
Paper Information
Category: Special issue-Precision optical metrological testing
Received: Nov. 24, 2021
Accepted: --
Published Online: Mar. 21, 2022
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