Infrared and Laser Engineering, Volume. 51, Issue 4, 20210549(2022)
Design of miniaturized dual-band observation system with composite aperture
Figures & Tables(25)
Fig. 2. Schematic diagram of the relation between the angle between the adjacent sub-eye axes and the sub-eye field angle
Fig. 14. MTF in mid-wave infrared band of sub-eye at −40 ℃ and +60 ℃
Fig. 15. MTF in visible light band of receiving system at −40 ℃ and +60 ℃
Fig. 16. MTF in mid-wave infrared band of receiving system at −40 ℃ and +60 ℃
Fig. 18. NITD of each surface and total NITD of the medium wave infrared system
Table 1. Relation between the angle between the adjacent subocular axes and the half-field angle of the sub-eye
View tableView in ArticleTable 1. Relation between the angle between the adjacent subocular axes and the half-field angle of the sub-eye
Relationship Conclusion Δϕ=0 The optical axes are parallel to each other, and the total field of view of the system is close to the size of the field of view of a single aperture 0<Δϕ<ω0 The outer two fields of view of the three adjacent subeyes meet at infinity, and the detection range of the middle sub-eye and the adjacent sub-eyes completely overlap Δϕ=2ω0 The edge field of view of adjacent subapertures is parallel, there is a gap at infinity, and there is a blind spot in the field of view Δϕ>2ω0 The peripheral fields of view of adjacent sub-eyes do not overlap, so there must be a blind spot
Table 2. Optical system parameters of bionic compound eye with curved surface
View tableView in ArticleTable 2. Optical system parameters of bionic compound eye with curved surface
Parameter Value Field of view, FOV/(°) 116 Aperture of sub-eye, D/mm 10 Angle of adjacent sub-eye, ∆θ/(°) 16 Number of sub-eye 37 Radius of base layer, R/mm 65
Table 3. Sub-visual parameters
View tableView in ArticleTable 3. Sub-visual parameters
Parameter Visible MWIR Band/μm 0.38-0.76 3-5 Focal length/mm 30 F number 3 Field angle/(°) 20
Table 4. Optical parameters of the receiving system
View tableView in ArticleTable 4. Optical parameters of the receiving system
Parameter Visible MWIR Band/μm 0.38-0.76 3-5 Field angle/（°） 96 F/# 2 Pixel 1456×1088 640×512 Pixel size/μm 3.45×3.45 15×15
Table 5. Focal lengths of sub-eye systems in VIS and MWIR bands at different temperatures
View tableView in ArticleTable 5. Focal lengths of sub-eye systems in VIS and MWIR bands at different temperatures
Temperature/℃ VIS/mm MWIR/mm −40 29.9798 30.1276 20 29.9987 30.0417 60 30.0177 30.1470
Table 6. Focal lengths of receiving systems in VIS and MWIR bands at different temperatures
View tableView in ArticleTable 6. Focal lengths of receiving systems in VIS and MWIR bands at different temperatures
Temperature/℃ Visible/mm MWIR/mm −40 2.6001 4.5925 20 2.6054 4.672 +60 2.6101 4.6130
Table 7. Tolerance allocation
View tableView in ArticleTable 7. Tolerance allocation
Parameters Valum Radius/Fringes 4 Thickness/mm ±0.01 Surface decenter/mm ±0.02 Surface tilt/(°) ±0.01 Element decenter/mm ±0.02 Element tilt/(°) ±0.01 Index 0.001 Abbe 0.5%
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Xiaolei Li, Ming Gao. Design of miniaturized dual-band observation system with composite aperture[J]. Infrared and Laser Engineering, 2022, 51(4): 20210549
Paper Information
Category: Optical design
Received: Aug. 6, 2021
Accepted: --
Published Online: May. 18, 2022
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