Design of Visible Broadband Computational Imaging System with Single-Layer Diffractive Element

Yiang Wang; Yang Hu; Mingxu Piao; bo Zhang; Zhe Wang; Chengran Zhang; Dechao Ma

doi:10.3788/AOS221683

Acta Optica Sinica, Volume. 43, Issue 5, 0522001(2023)

Design of Visible Broadband Computational Imaging System with Single-Layer Diffractive Element

Yiang Wang¹, Yang Hu^2、**, Mingxu Piao^1、*, bo Zhang¹, Zhe Wang¹, Chengran Zhang¹, and Dechao Ma¹

Author Affiliations

¹School of Opto-Electronic Engineering, Changchun University of Science and Technology, Changchun 130022, Jilin, China

²Luoyang Institute of Electro-Optical Equipment of Aviation Industry Corporation of China, Ltd., Luoyang 471000, Henan, China

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Figures & Tables(15)

Fig. 1. Schematic diagram of PSF construction process

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Fig. 2. Schematic diagram of quantum efficiency of NOIP1SN5000A-D-type CMOS

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$First-order diffraction efficiencies under different design wavelengths. (a) 460 nm; (b) 540 nm; (c) 610 nm$

Fig. 3. First-order diffraction efficiencies under different design wavelengths. (a) 460 nm; (b) 540 nm; (c) 610 nm

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Fig. 4. Structural diagram of patent system

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Fig. 5. MTF curve of patent system

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Fig. 6. Structural diagram of optimized system

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Fig. 7. MTF curve of optimized system

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Fig. 8. Constructed R-channel PSF model. (a) Overall; (b) partial magnification

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Fig. 9. Constructed G-channel PSF model. (a) Overall; (b) partial magnification

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Fig. 10. Constructed B-channel PSF model. (a) Overall; (b) partial magnification

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Fig. 11. Comparison of color image restoration results. (a) Image before restoration; (b) image after restoration; (c) partial magnification of image before restoration; (d) partial magnification of image after restoration

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Fig. 12. Comparison of gray images of R, G, B channels before and after restoration. (a) Gray image of R channel before restoration; (b) gray image of R channel after restoration; (c) gray image of G channel before restoration; (d) gray image of G channel after restoration; (e) gray image of B channel before restoration; (f) gray image of B channel after restoration

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Table 1. First-order diffraction efficiencies at specified wavelengths under different design wavelengths
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Table 1. First-order diffraction efficiencies at specified wavelengths under different design wavelengths
Design wavelength /nm 400 nm 460 nm 540 nm 610 nm 800 nm
460 91.18 100.00 92.03 79.68 50.27
540 59.65 88.91 100.00 95.30 67.90
610 28.88 65.50 93.95 100.00 81.71

Table 2. Parameters of patent system
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Table 2. Parameters of patent system
Parameter Value
F-number 5.6
Focal length /mm 50
Field of view /（ $°$ ） 34
Wavelength /nm 486.1-656.3

Table 3. Image evaluation results
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Table 3. Image evaluation results
Evaluation method R G B Color
Blurred Restored Blurred Restored Blurred Restored Blurred Restored
BIQI 45.96 43.67 34.22 32.36 38.71 38.23 36.64 35.06
GMG 1.73 2.62 2.69 3.35 2.05 3.06 2.15 3.01

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Yiang Wang, Yang Hu, Mingxu Piao, bo Zhang, Zhe Wang, Chengran Zhang, Dechao Ma. Design of Visible Broadband Computational Imaging System with Single-Layer Diffractive Element[J]. Acta Optica Sinica, 2023, 43(5): 0522001

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