Infrared and Laser Engineering, Volume. 50, Issue 5, 20200322(2021)
Design of airborne dual-band common aperture photoelectric aiming optical system
Figures & Tables(17)
Fig. 4. Modulation transfer function diagram of visible light imaging system
Fig. 7. Modulation transfer function diagram of mid-wave infrared imaging system
Fig. 8. Modulation transfer function diagram of visible light imaging system at −40 ℃ and 60 ℃
Fig. 9. Modulation transfer function diagram of mid-wave infrared imaging system at −40 ℃ and 60 ℃
Fig. 11. Relationship between spatial frequency, transmission distance and MRTD
Table 1. Optical system parameters
View tableView in ArticleTable 1. Optical system parameters
Visible MWIR Band/μm 0.38-0.76 3-5 F number 4 4 Zoom ratio 5× 3× Field angle/(°) 3.6-17.5 20.5/10.47/6.7 Focal length range/mm 36-180 36/72/108 Detection distance/km 12 5 Identify distance/km 5 2.5
Table 2. Visible light system focal length changes with temperature
View tableView in ArticleTable 2. Visible light system focal length changes with temperature
Temperature/ ℃ Short focal/ mm Medium focal/ mm Long focal/ mm Visible −40 36.012 107.859 180.229 20 36.003 108 179.997 60 35.996 108.085 179.622
Table 3. Mid-wave infrared system focal length changes with temperature
View tableView in ArticleTable 3. Mid-wave infrared system focal length changes with temperature
Temperature/℃ Short focal/mm Medium focal/mm Long focal/mm MWIR −40 36.129 71.766 107.185 20 35.998 72.018 107.997 60 35.911 72.190 108.540
Table 4. Tolerance analysis MTF value
View tableView in ArticleTable 4. Tolerance analysis MTF value
Visible MWIR Probability MTF Probability MTF 90%≥ 0.21376904 90%≥ 0.22377023 80%≥ 0.24542885 80%≥ 0.24953061 50%≥ 0.28844132 50%≥ 0.28550645 20%≥ 0.35394512 20%≥ 0.30674293 10%≥ 0.39609408 10%≥ 0.31060533
Table 5. Detection distance and MRTD value
View tableView in ArticleTable 5. Detection distance and MRTD value
R/km 2 4 5 MRTD/mK 155.6746 311.3492 389.1865
Tools
Get Citation
Copy Citation Text
Xiaoyang Chen, Ming Gao. Design of airborne dual-band common aperture photoelectric aiming optical system[J]. Infrared and Laser Engineering, 2021, 50(5): 20200322
Paper Information
Category: Optical design
Received: Aug. 21, 2020
Accepted: --
Published Online: Aug. 13, 2021
The Author Email: Gao Ming (minggao1964@163.com)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20