高分辨率微型星载相机光学系统的设计及应用 下载: 696次
Design and application of optical system for high-resolution micro space-borne camera
福建师范大学 光电与信息工程学院 医学光电科学与技术教育部重点实验室,福建 福州 350007
图 & 表
图 1. Schematic diagram of space-borne camera optical system
Fig. 1. Schematic diagram of space-borne camera optical system
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图 2. MTF curves
Fig. 2. MTF curves
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图 3. Spot diagrams
Fig. 3. Spot diagrams
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图 4. Spherical aberration and position chromatism
Fig. 4. Spherical aberration and position chromatism
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图 5. Field curvature and optical distortion
Fig. 5. Field curvature and optical distortion
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图 6. Lateral color
Fig. 6. Lateral color
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图 7. Relative illumination
Fig. 7. Relative illumination
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图 8. Diffraction encircle energy ratio
Fig. 8. Diffraction encircle energy ratio
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图 9. Defocus MTF curve
Fig. 9. Defocus MTF curve
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图 10. MTF curve at 1 000 m
Fig. 10. MTF curve at 1 000 m
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图 11. Image plane drift caused by temperature changes
Fig. 11. Image plane drift caused by temperature changes
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图 12. Image plane drift caused by temperature changes in vacuum
Fig. 12. Image plane drift caused by temperature changes in vacuum
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图 13. p=0,T=3 ℃处MTF
Fig. 13. p=0,T=3 ℃处MTF
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图 14. p=0,T=18 ℃处MTF
Fig. 14. p=0,T=18 ℃处MTF
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图 15. p=0,T=28 ℃处MTF
Fig. 15. p=0,T=28 ℃处MTF
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图 16. Measured MTF
Fig. 16. Measured MTF
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图 17. Space-borne camera optical system of 25-megapixel
Fig. 17. Space-borne camera optical system of 25-megapixel
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图 18. Visible image by space-borne camera
Fig. 18. Visible image by space-borne camera
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表 1系统性能技术指标要求
Table1. System performance specification requirements
Parameters | Value | Focal length/mm | 179 | Pupil diameter/mm | ≥44 | Distortion/% | <3 | Lens weight/g | ≤800 | Every lens weight/g | ≤300 | Imaging band/nm | 450~800 | Radiation resistance/krad | ≥5 | MTF | Point MTF on axis:≥0.5@55 lp/mm
≥0.3@110 lp/mm
| 0.6 W field of MTF:≥0.4@55 lp/mm
≥0.25@110 lp/mm
| Boundary dimension/mm | ≤Φ70 ×150
| Field angle/(º) | 10.4(8.35º×6.25º) | Relative illumination | ≥0.7 |
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表 2光学系统结构参数
Table2. Structural parameters of optical system
Surf | Radius/mm | Thickness/mm | Glass | | Surf | Radius/mm | Thickness/mm | Glass | 1 | − | 5 | SLLICA | | 11 | 48.24 | 6.26 | H-ZF62 | 2 | − | 0.1 | | | 12 | −242.53 | 13.89 | H-ZLAF76 | 3 | 49.38 | 10.5 | H-FK61 | | 13 | 28.59 | 9.5 | | 4 | −322.26 | 0.18 | | | STO | − | 12.95 | | 5 | 54.39 | 5.82 | H-FK61 | | 15 | −98.86 | 4.2 | F5 | 6 | 185.58 | 1.09 | | | 16 | −23.13 | 5.85 | H-ZLAF68 | 7 | − | 0.38 | | | 17 | −56.19 | 63.94 | | 8 | −637 | 2.6 | H-ZLAF76 | | 18 | − | 3 | K9 | 9 | 35.57 | 5.56 | H-LAK2 | | 19 | − | 0 | | 10 | 121.41 | 0.15 | | | IMA | − | 0 | |
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表 3光学系统玻璃材料参数
Table3. Glass material parameters of optical system
Material | nd | vd | SLLICA | 1.458 464 | 67.821 4 | H-FK61 | 1.497 | 81.61 | H-ZLAF76 | 1.850 13 | 30.06 | H-LAK2 | 1.692 11 | 54.54 | H-ZF62 | 1.922 86 | 20.88 | F5 | 1.624 35 | 35.92 | H-ZLAF68 | 1.883 | 39.22 | K9 | 1.516 8 | 64.2 |
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陈玉芳, 吴振聪, 王敏. 高分辨率微型星载相机光学系统的设计及应用[J]. 应用光学, 2020, 41(2): 235. Yufang CHEN, Zhencong WU, Min WANG. Design and application of optical system for high-resolution micro space-borne camera[J]. Journal of Applied Optics, 2020, 41(2): 235.