Acta Photonica Sinica, Volume. 53, Issue 7, 0712001(2024)
Influence of Infrared Window on the Radiation Ideality of Package Blackbody and Correction Method
Figures & Tables(12)
Fig. 1. Radiation flux entering the entrance pupil of infrared detector during blackbody calibration of windowless package
Fig. 2. Radiation flux entering the entrance pupil of infrared detector during window package blackbody calibration
Fig. 5. Comparison and error between the theoretical value of blackbody of Ge window package and the simulated apparent value
Fig. 6. Comparison and error between the theoretical value of blackbody of BaF2 window package and the simulated apparent value
Fig. 7. Changes of blackbody surface attenuation/spectral attenuation and window stray increment/spectral stray increment with calibration and environment temperature by target surface
Fig. 8. Blackbody radiation source temperature measurement experiment
Fig. 9. Comparison and error between the measured results of blackbody calibration temperature and apparent temperature before and after correction of window package
Table 1. Model boundary condition setting
View tableView in ArticleTable 1. Model boundary condition setting
Boundary conditions Characteristics Radiation direction Temperature/℃ Blackbody surface Diffuse gray radiator Lambert's law Calibration temperature
［-50，10，50］
Window surface Selective radiator Vertical to the window Environment temperature
［-50，10，50］
Environment Perfect blackbody Vertical to the window Environment temperature
［-50，10，50］
Packaging structure Complete mirror reflection / / Integrating sphere Perfect absorber / /
Table 2. Coefficient fitting value list
View tableView in ArticleTable 2. Coefficient fitting value list
Environment
temperature/℃
Ge window BaF2 window A B C A B C 50 0.093 8 -2.368 7 14.937 0.133 -3.554 8 23.297 40 0.085 -2.151 4 12.998 0.122 9 -3.275 8 20.438 30 0.076 2 -1.938 8 11.149 0.112 4 -2.994 8 17.675 20 0.067 6 -1.732 7 9.398 8 0.101 5 -2.714 3 15.023 10 0.059 1 -1.534 9 7.756 7 0.090 5 -2.437 3 12.498 0 0.051 -1.347 6.230 1 0.079 5 -2.167 2 10.119 -10 0.043 3 -1.171 1 4.826 7 0.074 1 -2.038 4 9.011 4 -20 0.036 -1.008 4 3.551 5 0.063 4 -1.784 7 6.878 1 -30 0.029 4 -0.860 1 2.407 8 0.048 1 -1.430 6 3.998 8 -40 0.023 4 -0.727 4 1.397 3 0.038 9 -1.220 2 2.338 4 -50 0.018 1 -0.610 7 0.519 1 0.030 4 -1.031 6 0.879 6
Table 3. Summary of uncertainty in temperature measurement experiment
View tableView in ArticleTable 3. Summary of uncertainty in temperature measurement experiment
Uncertainty component Standard uncertainty PT1000 equipment 0.133 ℃ Repeated measurement of calibration temperature 0.051 ℃ The average emissivity of blackbody target surface deviates from 0.97 0.117 ℃ Temperature uniformity of blackbody target surface 0.006 ℃ Repeated measurement of apparent temperature 0.130 ℃ High and low experimental box equipment 0.006 ℃
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Jingyang ZHANG, Lingqi MENG, Xinzhu MOU, Ping SHEN, Sheng XU. Influence of Infrared Window on the Radiation Ideality of Package Blackbody and Correction Method[J]. Acta Photonica Sinica, 2024, 53(7): 0712001
Paper Information
Category: Instrumentation, Measurement and Metrology
Received: Oct. 24, 2023
Accepted: Jan. 8, 2024
Published Online: Aug. 12, 2024
The Author Email: ZHANG Jingyang (zjy@nuaa.edu.cn)
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