Design of Wide-Band Wide-Area High-Resolution Optical System Based on Multi-Scale Imaging

Fanfan Zhang; Jun Liu; Ming Gao; Lü Hong

doi:10.3788/LOP231599

Laser & Optoelectronics Progress, Volume. 61, Issue 12, 1222001(2024)

Design of Wide-Band Wide-Area High-Resolution Optical System Based on Multi-Scale Imaging

Fanfan Zhang, Jun Liu^*, Ming Gao, and Lü Hong

Author Affiliations

School of Opto-electronical Engineering, Xi'an Technological University, Xi'an 710021, Shaanxi , China

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Figures & Tables(17)

Fig. 1. Schematic diagram of a concentric multi-scale optical imaging system

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Fig. 2. Schematic diagrams of two types of concentric multi-scale imaging structures. (a) Kepler type; (b) Galileo type

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Fig. 3. Schematic diagrams of field overlap splicing layout of adjacent subsystems. (a) Profile view; (b) side view

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Fig. 4. Schematic diagram of double-layer concentric spherical lens

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Fig. 5. Optimized structure of the concentric sphere lens

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Fig. 6. Image quality evaluation diagrams of the concentric sphere lens. (a) Spot diagram; (b) field curve/distortion diagram; (c) MTF curve diagram; (d) relative illumination curve diagram

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Fig. 7. Optical path structure of secondary repeater subsystem

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Fig. 8. Image quality evaluation diagrams of secondary relay subsystem. (a) Spot diagram; (b) field curve/distortion diagram; (c) MTF curve diagram; (d) relative illumination curve diagram

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Fig. 9. Optical path structure of single-channel combined system

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Fig. 10. Image quality evaluation diagrams of single-channel combined system. (a) Spot diagram; (b) field curve/distortion diagram; (c) MTF curve diagram; (d) relative illumination curve diagram

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Fig. 11. Concentric multi-scale imaging system. (a) Center field of view with single-layer array; (b) full field of view with three-layer array

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Fig. 12. 200 sets of Monte Carlo tolerance analysis results for a concentric multi-scale imaging system

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Table 1. Main parameters of GH-SW640pro visible shortwave infrared focal plane array detector
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Table 1. Main parameters of GH-SW640pro visible shortwave infrared focal plane array detector
Parameter Value
Number of effective pixels 640×512
Pixel size /μm 15×15
Diagonal of CCD（charge coupled device）/mm 12.29
Spectral response band /μm 0.4‒1.7

Table 2. Design index parameters of the optical system

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Table 2. Design index parameters of the optical system

Parameter	Fore monocentric lens	Microcamera	Synthetic system
Focal length /mm	120	60	60
F number	6	3	3
FOV（field of view）/（°）	110	12	105.6×25.6
Wavelength /μm	0.4‒1.7	0.4‒1.7	0.4‒1.7
Magnification	—	‒0.5	—

Table 3. Structure parameters of single-channel combined system

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Table 3. Structure parameters of single-channel combined system

Surface	Radius of curvature /mm	Thickness /mm	Glass	Semi-diameter /mm
OBJ	Infinity	Infinity	—	Infinity
1	67.350	34.638	H-TF3L	26.537
2	32.701	32.701	H-FK61	22.595
3	Infinity	32.701	H-FK61	21.810
4	-32.701	34.638	H-TF3L	20.977
5	-67.350	52.363	—	22.372
6	-119.851	68.921	—	12.777
7	55.550	8.000	H-ZLAF2A	12.775
8	-337.694	19.058	—	12.326
9	18.990	5.531	H-ZPK5	7.428
10	-29.540	4.738	H-QF3	6.262
11	14.696	1.745	—	4.623
STO	Infinity	1.979	—	4.310
13	-11.559	3.996	H-TF3L	4.656
14	22.108	3.783	H-ZPK5	6.468
15	-15.844	16.399	—	6.989
16	35.858	6.000	H-ZPK5	11.750
17	-37.906	7.085	—	11.723
18	56.754	8.001	H-ZLAF92	10.757
19	-24.126	8.000	H-ZF3	10.052
20	13.885	10.746	—	6.796
21	Infinity	0.500	H-K9L	6.213
22	Infinity	0.200	—	6.198
IMA	Infinity	—	—	6.191

Table 4. Array layout parameters of the trunk subsystem

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Table 4. Array layout parameters of the trunk subsystem

Superstratum array	Tilt X /（°）	Tilt Y /（°）	Interlayer array	Tilt X /（°）	Lower array	Tilt X /（°）	Tilt Y /（°）
1	-42.9	6.8	1	-46.8	1	-42.9	-6.8
2	-35.1	6.8	2	-39.0	2	-35.1	-6.8
3	-27.3	6.8	3	-31.2	3	-27.3	-6.8
4	-19.5	6.8	4	-23.4	4	-19.5	-6.8
5	-11.7	6.8	5	-15.6	5	-11.7	-6.8
6	-3.9	6.8	6	-7.8	6	-3.9	-6.8
7	3.9	6.8	7	0	7	3.9	-6.8
8	11.7	6.8	8	7.8	8	11.7	-6.8
9	19.5	6.8	9	15.6	9	19.5	-6.8
10	27.3	6.8	10	23.4	10	27.3	-6.8
11	35.1	6.8	11	31.2	11	35.1	-6.8
12	42.9	6.8	12	39.0	12	42.9	-6.8
—	—	—	13	46.8	—	—	—

Table 5. System tolerance allocation

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Table 5. System tolerance allocation

Parameter	Specification
Radius /fringe	±2
Thinkness /mm	±0.02
Surface XY decenter /mm	±0.01
Surface XY tilt /（°）	±0.0167
Element XY decenter /mm	±0.01
Element XY tilt /（°）	±0.0167
Abbe number /%	±0.5
Index	±0.001
Zernike irregularity /fringe	±0.1

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Fanfan Zhang, Jun Liu, Ming Gao, Lü Hong. Design of Wide-Band Wide-Area High-Resolution Optical System Based on Multi-Scale Imaging[J]. Laser & Optoelectronics Progress, 2024, 61(12): 1222001

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