Acta Optica Sinica, Volume. 41, Issue 14, 1422003(2021)
Design of Optical System for Infrared Scene Projection in Cryogenic Environment
Figures & Tables(23)
Fig. 1. Principle of the infrared image generation system. (a) Structure of the MEMS conversion film; (b) projection light path of the infrared image
Fig. 6. Energy diagram of the diffraction encircling circle of the projection system
Fig. 7. Installation of the primary mirror. (a) Clamping ring installation; (b) tablet installation
Fig. 8. Installation of the secondary mirror. (a) Clamping ring installation; (b) tablet installation
Fig. 9. Deformation analysis results of the primary mirror. (a) Clamping ring installation; (b) tablet installation
Fig. 10. Deformation analysis results of the secondary mirror. (a) Clamping ring installation; (b) tablet installation
Fig. 16. MTF curves of the system at different temperatures. (a) 300 K; (b) 260 K; (c) 220 K; (d) 180 K; (e) 140 K; (f) 100 K
Fig. 18. Experimental results of the projection system. (a) Thermal image of the knife edge; (b) MTF curve
Fig. 19. Projection experimental setup at room temperature. (a) Experimental setup; (b) infrared image
Fig. 20. Projection experimental setup at low temperature. (a) Experimental setup; (b) infrared image
Table 1. Surface coefficients of the primary and secondary mirrors of the projection system
View tableTable 1. Surface coefficients of the primary and secondary mirrors of the projection system
Surface coefficient Primary mirror Secondary mirror K -10.20 -1.36 α1 0 0 α2 -2.625×10-8 -9.427×10-9 α3 9.262×10-13 2.353×10-11 α4 -2.97×10-17 -1.039×10-14
Table 2. Zernike coefficient of the primary mirror
View tableTable 2. Zernike coefficient of the primary mirror
No. Coefficient No. Coefficient No. Coefficient 1 1.69×10-3 14 -3.86×10-6 27 -2.97×10-6 2 -6.84×10-7 15 -5.34×10-6 28 -2.18×10-5 3 -1.33×10-6 16 6.49×10-4 29 -6.02×10-6 4 9.60×10-4 17 -1.48×10-5 30 1.01×10-6 5 -6.76×10-6 18 -5.26×10-6 31 -1.55×10-6 6 -3.22×10-6 19 2.44×10-6 32 4.42×10-6 7 -7.47×10-7 20 1.86×10-6 33 -4.72×10-7 8 1.01×10-6 21 -3.20×10-6 34 -3.07×10-6 9 -1.06×10-3 22 -1.92×10-6 35 -1.03×10-5 10 1.94×10-6 23 1.07×10-6 36 2.91×10-4 11 1.95×10-6 24 6.86×10-6 37 -3.88×10-5 12 -3.15×10-6 25 -3.66×10-4 13 -2.98×10-6 26 -8.19×10-7
Table 3. Zernike polynomial coefficients of the secondary mirror
View tableTable 3. Zernike polynomial coefficients of the secondary mirror
No. Coefficient No. Coefficient No. Coefficient 1 -8.73×10-5 14 2.42×10-6 27 6.01×10-6 2 -2.65×10-7 15 -6.81×10-7 28 1.89×10-6 3 9.28×10-7 16 -3.21×10-6 29 -7.42×10-7 4 1.98×10-5 17 1.15×10-6 30 -1.21×10-5 5 7.55×10-7 18 5.89×10-7 31 -3.01×10-6 6 1.56×10-6 19 -3.39×10-5 32 -3.70×10-7 7 2.51×10-6 20 -8.01×10-6 33 8.70×10-7 8 -6.07×10-7 21 2.34×10-6 34 2.08×10-7 9 -8.27×10-6 22 2.18×10-6 35 -3.61×10-7 10 -4.26×10-5 23 3.07×10-7 36 1.9×10-6 11 -9.98×10-6 24 1.30×10-8 37 2.05×10-6 12 4.74×10-6 25 1.48×10-6 13 3.67×10-6 26 2.67×10-6
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Sichen Zhang, Zhuo Li, Yanze Gao, Rui Shi, Jian Du, Qingfeng Shi, Xin Wang, Suhui Yang. Design of Optical System for Infrared Scene Projection in Cryogenic Environment[J]. Acta Optica Sinica, 2021, 41(14): 1422003
Paper Information
Category: Optical Design and Fabrication
Received: Dec. 9, 2020
Accepted: Feb. 22, 2021
Published Online: Jul. 11, 2021
The Author Email: Yanze Gao (gao_yanze@bit.edu.cn)
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