Optical System Design of Miniature and Low-Cost Unmanned Airborne Imaging Spectrometer

Yan Zhang; Changxiang Yan; Congjun Wu; Xueping Ju; Junqiang Zhang; Xianfeng Li

doi:10.3788/AOS250488

Acta Optica Sinica, Volume. 45, Issue 9, 0922002(2025)

Optical System Design of Miniature and Low-Cost Unmanned Airborne Imaging Spectrometer

Yan Zhang^1,2, Changxiang Yan^1,3, Congjun Wu^1、*, Xueping Ju¹, Junqiang Zhang^1,4, and Xianfeng Li^1,4

¹Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, Jilin , China

²University of Chinese Academy of Sciences, Beijing 100049, China

³Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

⁴Changguang Yuchen Information Technology and Equipment (Qingdao) Co., Ltd., Qingdao 266000, Shandong , China

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Figures & Tables(20)

$Diagram of chromatic aberration correction using refractive diffractive hybrid elements$

Fig. 1. Diagram of chromatic aberration correction using refractive diffractive hybrid elements

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Fig. 2. Front telescope system structure. (a) Plane figure; (b) stereogram

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Fig. 3. Axial aberration comparison chart. (a) No binary surface added; (b) add binary surface

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Fig. 4. MTF diagram of the front telescope system

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Fig. 5. Spot diagram of the front telescope system

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Fig. 6. Characteristic parameter curves of binary surface

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$Diffraction efficiency of binary plane at different wavelengths$

Fig. 7. Diffraction efficiency of binary plane at different wavelengths

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Fig. 8. Offner structure diagram

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Fig. 9. Schematic diagram of Offner-like structure

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Fig. 10. Comparison of system aberrations with and without aspheric surface

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Fig. 11. Structure of post spectral imaging system. (a) Plane figure; (b) stereogram

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Fig. 12. MTF diagrams of post spectral imaging system in each band. (a) 400 nm; (b) 700 nm; (c) 1000 nm

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Fig. 13. Spot diagrams of post spectral imaging system in each band. (a) 400 nm; (b) 700 nm; (c) 1000 nm

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Fig. 14. Optical system structure diagram of imaging spectrometer. (a) Plane figure; (b) stereogram

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Fig. 15. MTF diagrams of overall optical system for each band. (a) 400 nm; (b) 700 nm; (c) 1000 nm

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Fig. 16. Spot diagrams of overall optical system for each band. (a) 400 nm; (b) 700 nm; (c) 1000 nm

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Fig. 17. Distortion image of overall optical system for each band

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Fig. 18. Spot diagram of 3 nm wavelength interval

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Table 1. Main design indexes of optical system
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Table 1. Main design indexes of optical system
Index Value
Wavelength range /nm 400‒1000
F number 4
Field of view /（°） 40
Spectral resolution /nm 3
Height /m 120
Groud sample of distance /m 0.075
Detector pixel size /（ $μ m$ × $μ m$ ） 14 $\times$ 14

Table 2. Comparison of characteristics between refractive elements and binary optical elements
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Table 2. Comparison of characteristics between refractive elements and binary optical elements
Characteristic Refractive optical elements Binary optical elements
Optical power $Φ = (n - 1) (\frac{1}{R_{1}} - \frac{1}{R_{2}})$ $Φ_{B O E} = - 2 A_{1} m λ$
Abbe number $V_{D} = \frac{n_{D} - 1}{n_{F} - n_{C}} > 0$ $V_{D}^{B O E} = \frac{- λ_{D}}{λ_{C} - λ_{F}} < 0$
Partial dispersion $P_{F D} = \frac{n_{F} - n_{D}}{n_{F} - n_{C}}$ $P_{F D}^{B O E} = \frac{λ_{D} - λ_{F}}{λ_{C} - λ_{F}}$

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Yan Zhang, Changxiang Yan, Congjun Wu, Xueping Ju, Junqiang Zhang, Xianfeng Li. Optical System Design of Miniature and Low-Cost Unmanned Airborne Imaging Spectrometer[J]. Acta Optica Sinica, 2025, 45(9): 0922002

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