Laser & Optoelectronics Progress, Volume. 60, Issue 23, 2322001(2023)
Impact Simulation Analysis and Optimization of a Long-Wave Infrared Optical Lens
Figures & Tables(17)
Fig. 5. Zernike coefficient of each lens surface. (a) Lens 1; (b) lens 2; (c) lens 3
Table 1. Technical index of infrared optical lens
View tableTable 1. Technical index of infrared optical lens
Spectral response /μm Focal length /mm F Field of view /（°）×（°） Operating temperature /℃ 8‒12 90 1.0 8.5×6.4 －40‒60
Table 2. Infrared optical lens material properties
View tableTable 2. Infrared optical lens material properties
Material Density /（kg·m-3） Elastic modulus /GPa Poisson’s ratio Yield limit /MPa Ge 5320 103 0.28 345 Al 2780 76 0.33 240
Table 3. PV and RMS of lens surface after impact
View tableTable 3. PV and RMS of lens surface after impact
Parameter Lens 1 Lens 2 Lens 3 First side Second side First side Second side First side Second side PV of lens surface / μm 51.4 49.6 53.5 44.5 3.3 2.9 RMS of lens surface / μm 12.8 13.2 13.6 11.4 0.8 0.7
Table 4. Rigid body displacement of mirror after impact
View tableTable 4. Rigid body displacement of mirror after impact
Parameter Lens 1 Lens 2 Lens 3 First side Second side First side Second side First side Second side e 8.10×10-5 -9.68×10-5 1.70×10-4 1.40×10-4 1.01×10-5 9.98×10-6 f -3.25×10-2 1.69×10-2 2.49×10-2 2.48×10-2 -2.83×10-3 -2.83×10-3 g -3.38×10-2 7.60×10-3 1.70×10-2 1.71×10-2 7.48×10-5 7.75×10-5 θx 1.48×10-5 5.70×10-4 7.50×10-4 7.50×10-4 7.74×10-5 7.74×10-5 θy 4.76×10-7 2.38×10-6 -1.97×10-6 -1.52×10-6 3.50×10-7 3.14×10-7 θz -2.20×10-7 1.94×10-8 -3.03×10-6 -3.03×10-6 -4.65×10-7 -4.70×10-7
Table 5. Preferred candidate point values
View tableTable 5. Preferred candidate point values
Candidate point Input parameter Output parameter P1 P2 P3 P4 P5 P6 P7 1 2.8667 1.7333 2.7333 6.000 7.4167 0.0371 0.0427 2 2.3333 2.2667 2.4667 5.600 7.2500 0.0381 0.0434 3 3.5333 2.0000 3.2667 7.200 5.9167 0.0374 0.0432
Table 6. Comparison of model data before and after optimization
View tableTable 6. Comparison of model data before and after optimization
Condition P1 /mm P2 /mm P3 /mm P4 /mm P5 /mm Mass /kg Before optimization 3.0 1.5 3.0 6.0 6.0 0.99457 After optimization 2.8 1.7 2.7 6.0 7.4 0.97609
Table 7. Comparison of results before and after optimization
View tableTable 7. Comparison of results before and after optimization
Condition Maximum deformation /mm Maximum equivalent stress /MPa Lens 1 Lens 2 Lens 3 Lens 1 Lens 2 Lens 3 Before optimization 0.0454 0.0476 0.0039 194.74 125.32 80.14 After optimization 0.0361 0.0422 0.0030 158.81 101.26 74.81
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Long Chen, Yu Zhang, Kang Xie, Zhi Liu, Shenmin Zhou. Impact Simulation Analysis and Optimization of a Long-Wave Infrared Optical Lens[J]. Laser & Optoelectronics Progress, 2023, 60(23): 2322001
Paper Information
Category: Optical Design and Fabrication
Received: Oct. 31, 2022
Accepted: Jan. 12, 2023
Published Online: Dec. 11, 2023
The Author Email: Yu Zhang (498380267@qq.com)
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