Chinese Optics, Volume. 16, Issue 1, 158(2023)
Design of compound eye optical system with hexagonal band arrangement and common optical path
Fig. 2. Schematic diagram of main array direction sub aperture projection
Fig. 3. Sub aperture projection contrast of two arrangement models
Fig. 10. 2D model diagram of sub-apertures arranged in the plane direction of the main array
Fig. 15. MTF of sub aperture system at different bands at high and low temperatures
Fig. 16. MTF of relay system at different bands at high and low temperatures
Fig. 17. Reverse tracing diagram of reflected light on part surface of relay system
Fig. 19. Imaging optical path diagram of the main array direction of the compound eye optical system
Fig. 20. Overall imaging optical path diagram of compound eye optical system
Fig. 23. Field curve and distortion plot of the margin sub channel of the compound eye system
Fig. 24. RMS field of view wavefront diagram of center and edge sub-channels of compound eye combined system
Fig. 25. Results of 300 Monte Carlo tolerance analysis for compound eye system
Table 1. Relationship between overlapping angle of adjacent sub aperture and FOV of sub aperture
View tableView in ArticleTable 1. Relationship between overlapping angle of adjacent sub aperture and FOV of sub aperture
Angle relationship Conclusion β=0° The edge rays of adjacent sub-apertures are parallel, and there is a blind spot in the field of view at the object plane at finite distance 0°<β<ω Adjacent sub-aperture edge rays intersect β=ω Sub-aperture edge rays are parallel to adjacent sub-aperture optical axes β>ω Alternate sub-aperture edge rays overlap far away, and the intermediate sub-aperture field of view is meaningless
Table 2. Basic parameters of bionic compound eye optical system
View tableView in ArticleTable 2. Basic parameters of bionic compound eye optical system
Type The parameter value Main array direction FOV 2θ/(°) 96 sub-aperture FOV 2ω/(°) 9.0 The angle between the optical axes of adjacent sub-apertures Δφ/(°) 8.7 Base radius R/mm 111 Number of sub-apertures n 91 Number of sub-aperture array layers S 6
Table 3. Overall design index of compound eye system with hexagonal ring band
View tableView in ArticleTable 3. Overall design index of compound eye system with hexagonal ring band
Type The parameter value Detection distance/km 1 Target size/m 2 System diameter/mm <200 Wavelength/μm MWIR: 3.7~4.8 LWIR: 7.7~9.5
Table 4. Main parameters of infrared two-color detector
View tableView in ArticleTable 4. Main parameters of infrared two-color detector
Type The parameter value Resolution 320×256 cell size/μm 30×30 target size/mm 12.29
Table 5. Sub-aperture optical system design parameters
View tableView in ArticleTable 5. Sub-aperture optical system design parameters
MWIR LWIR Wavelength/μm 3.7~4.8 7.7~9.5 Focal length/mm 48 48 F# 3 3 Field of view/(°) 9 9
Table 6. Optical system design parameters of relay system
View tableView in ArticleTable 6. Optical system design parameters of relay system
MWIR LWIR Wavelength/μm 3.7~4.8 7.7~9.5 Focal length/mm 6 6 Detector size/mm 12.29 12.29 Field of view/(°) $ \geqslant $ 92$ \geqslant $ 92
Table 7. Focal length values of sub aperture systems at different band temperatures
View tableView in ArticleTable 7. Focal length values of sub aperture systems at different band temperatures
Temperature/°C MWIR/mm LWIR/mm −40 47.9395 48.0351 +20 47.9392 48.0347 +60 47.9391 48.0346
Table 8. Focal length values of relay systems at different band temperatures
View tableView in ArticleTable 8. Focal length values of relay systems at different band temperatures
Temperature/°C MWIR/mm LWIR/mm −40 6.1532 6.1422 +20 6.1426 6.1320 +60 6.1351 6.1252
Table 9. YNI and I/IBAR values on all surfaces of relay system
View tableView in ArticleTable 9. YNI and I/IBAR values on all surfaces of relay system
Surface YNI I/IBAR Surface YNI I/IBAR 1 1.227 3.165 9 1.265 0.525 2 1.425 0.810 10 1.389 0.527 3 1.441 0.814 11 −1.174 3.822 4 3.089 1.465 12 −0.973 16.673 5 −2.574 4.499 13 −1.231 0.089 6 −2.205 4.156 14 −0.166 0.243 7 0.267 0.137 15 −0.360 1.058 8 0.168 0.073 16 −0.282 0.414
Table 10. Tolerance assignment table for compound eye system
View tableView in ArticleTable 10. Tolerance assignment table for compound eye system
Parameters Specification Radius/fringes ±2 Thickness/mm ±0.02 Surface XY decenter/mm ±0.01 Surface XY tilt/(°) ±0.02 Element XY decenter/mm ±0.01 Element XY tilt/(°) ±0.02 Abbe number 0.5% Index 0.001 Zernike irregularity/fringes 0.1
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Chen FAN, Jun LIU, Ming GAO, Hong LV. Design of compound eye optical system with hexagonal band arrangement and common optical path[J]. Chinese Optics, 2023, 16(1): 158
Category: Original Article
Received: Jun. 9, 2022
Accepted: --
Published Online: Jul. 5, 2023
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