Infrared and Laser Engineering, Volume. 50, Issue 6, 20200494(2021)
Model and compensation method of image point drift caused by self-heating of industrial camera
Figures & Tables(14)
Fig. 1. Temperature change of the imaging device and the main board after turning on
Fig. 5. Axial offset of the camera causes the imaging optical path to change
Fig. 7. Schematic diagram of image point shift caused by radial expansion
Fig. 8. Temperature changes of the experimental device and its components
Fig. 9. In the self-heating state, the coordinate value of each quadrant point after compensation is compared with the experimental measurement value
Table 1. Material properties of camera components
View tableView in ArticleTable 1. Material properties of camera components
Name Material Young’s modulus /GPa Density /kg·m−3 Specific heat capacity/J·kg−1·℃ Thermal conductivity W·m−1·℃ Thermal expansion coefficient/℃−1 Poisson ratio Body Aluminum alloy 71 2770 875 237 2.3×10−5 0.33 Lens tube, top plate Copper alloy 110 8300 385 401 1.8×10−5 0.34 CMOS Monocrystalline Silicon 190 2330 702 124 5.0×10−7 0.064 Lens housing ABS 2 880 1470 0.22 9.0×10−5 0.394 Lens Glass 88 2500 750 1.4 5.8×10−7 0.215
Table 2. Deformation of the lens and CMOS under different temperature variation
View tableView in ArticleTable 2. Deformation of the lens and CMOS under different temperature variation
Temperature increasement/℃ Lens translation/μm CMOS horizontal deformation/μm CMOS vertical deformation/μm 0 0.00 0.00 0.00 1 4.28 2.61 2.31 2 9.61 5.25 5.28 3 14.44 7.52 8.02 4 19.76 9.75 10.04 5 24.19 12.61 13.02 6 28.89 15.32 14.89 7 32.58 18.32 17.65
Table 3. Pixel drift compensation model error
View tableView in ArticleTable 3. Pixel drift compensation model error
First quadrant error/pixel Second quadrant error/pixel Third quadrant error/pixel Fourth quadrant error/pixel Minimum Max Minimum Max Minimum Max Minimum Max Horizontal coordinate value 0.00 0.09 0.00 0.12 0.00 0.12 0.00 0.13 Vertical coordinate value 0.00 0.10 0.00 0.20 0.00 0.15 0.00 0.16
Table 4. Comparison of thermal control device method and image point drift compensation method
View tableView in ArticleTable 4. Comparison of thermal control device method and image point drift compensation method
First quadrant error/pixel Second quadrant error/pixel Third quadrant error/pixel Fourth quadrant error/pixel Minimum Max Minimum Max Minimum Max Minimum Max Thermal control device method 0.00 0.20 0.01 0.17 0.02 0.13 0.01 0.15 Image point drift compensation method 0.00 0.10 0.00 0.20 0.01 0.15 0.00 0.16
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Jiahe Chai, Mingli Dong, Peng Sun, Bixi Yan. Model and compensation method of image point drift caused by self-heating of industrial camera[J]. Infrared and Laser Engineering, 2021, 50(6): 20200494
Paper Information
Category: Photoelectric measurement
Received: Dec. 15, 2020
Accepted: --
Published Online: Aug. 19, 2021
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