Chinese Optics, Volume. 16, Issue 4, 843(2023)
An adaptive optics system suitable for near-ground imaging
Fig. 2. Schematic diagram of S-H wavefront sensor. (a) Schematic diagram of optical path; (b) spot diagram
Fig. 3. Physical map of the adaptive optics imaging system. (a) Integrated imaging module; (b) imaging system
Fig. 5. The resolution plate images before and after correction at different distances. From left to right are the 1st, 6th, 11th, 16th and 21st frame images. (a) Before and (b) after correction with 50 m imaging range; (c) before and (d) after correction with 100 m imaging range; (e) before and (f) after correction with 150 m imaging range; (g) before and (h) after correction with 200 m imaging range
Fig. 6. Curves of PV and RMS values of the wavefront before and after correction at different distances. (a~d) PV values at 50 m, 100 m, 150 m and 200 m; (e~h) RMS values at 50 m, 100 m, 150 m and 200 m
Fig. 7. Partial enlarged image corresponding to the first frame image in Figure. 5(d)
Fig. 9. Concrete model images before and after correction at 200 m. From left to right are the 1st, 6th, 11th, 16th and 21st frame images. (a) Before and (b) after correction results
Table 1. Parameters of key devices
View tableView in ArticleTable 1. Parameters of key devices
Device Parameter Value Telescope objective Aperture/mm 356 Focal length/mm 3556 DM Aperture/mm 13.5 Number of drives 97 Drive interval/mm 1.5 S-H WFS Aperture/mm 5.85 Number of sub-apertures 1280 Frame rate/fps 100 Wavelength range/nm 400~1100 Microlens focal length/mm 3.5 CCD Horizontal and vertical pixels 2560×2048 Frame rate/fps 62 Pixel size/µm 5
Table 2. Main parameters of the lens and prism
View tableView in ArticleTable 2. Main parameters of the lens and prism
Optical element Focal length/mm Aperture/mm Material L1 90 30 H-K9、H-ZF2 L2 50 30 H-K9、H-ZF2 L3 100 25.4 H-K9、H-ZF2 L4 60 20 H-K9、H-ZF2 BS — 25.4 K9
Table 3. PV and RMS mean values of the resolution plate at different distances before and after correction
View tableView in ArticleTable 3. PV and RMS mean values of the resolution plate at different distances before and after correction
Distance/m PV /μm RMS /μm Before After Pct/% Before After Pct/% 50 4.703 1.745 62.89 1.218 0.384 68.47 100 6.077 2.579 57.56 1.519 0.643 57.67 150 8.822 3.863 56.21 1.927 0.936 51.43 200 31.36 16.58 47.15 7.826 4.105 47.55
Table 4. BRISQUE and PIQE mean values of the resolution plate at different distances before and after correction
View tableView in ArticleTable 4. BRISQUE and PIQE mean values of the resolution plate at different distances before and after correction
Distance/m BRISQUE PIQE Before After Pct/% Before After Pct/% 50 16.79 11.61 30.83 13.03 9.38 28.01 100 23.37 17.63 24.56 22.05 16.99 22.92 150 32.31 20.53 36.46 27.17 19.9 26.78 200 45.63 36.2 20.66 40.42 35.1 13.16
Table 5. PV and RMS mean values of the concrete model at 200 m before and after correction
View tableView in ArticleTable 5. PV and RMS mean values of the concrete model at 200 m before and after correction
Distance/m PV /μm RMS /μm Before After Pct/% Before After Pct/% 200 17.598 4.556 74.11 4.411 0.916 79.23
Table 6. BRISQUE and PIQE mean values of the concrete model at 200 m before and after correction
View tableView in ArticleTable 6. BRISQUE and PIQE mean values of the concrete model at 200 m before and after correction
Distance/m BRISQUE PIQE Before After Pct/% Before After Pct/% 200 38.65 21.34 44.79 39.95 24.72 38.12
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Hai-ming WANG, Jia-ning QUAN, Bao-zhen GE. An adaptive optics system suitable for near-ground imaging[J]. Chinese Optics, 2023, 16(4): 843
Category: Original Article
Received: Nov. 9, 2022
Accepted: --
Published Online: Jul. 27, 2023
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