Indirect Imaging Method of Ritchey-Chretien Optical System with Large Field of View

Hanqing Zheng; Qingfeng Cui; Yang Hu; Lin Sun; Yu Guo; Xudong Gao

doi:10.3788/AOS202141.0522002

Acta Optica Sinica, Volume. 41, Issue 5, 0522002(2021)

Indirect Imaging Method of Ritchey-Chretien Optical System with Large Field of View

Hanqing Zheng, Qingfeng Cui^*, Yang Hu, Lin Sun, Yu Guo, and Xudong Gao

Author Affiliations

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

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Figures & Tables(11)

Fig. 1. Flowchart of indirect imaging method

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Fig. 2. Structure of optical system

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Fig. 3. Point diagram of R-C system at different angles. (a) 0°; (b) 0.225°; (c) 0.315°; (d) 0.450°

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Fig. 4. Fitting results of Zernike polynomials

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Fig. 5. Wavefront comparison of R-C systems at different fields of view. (a) 0.12°; (b) 0.22°; (c) 0.34°; (d) 0.45°

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Fig. 6. PSF comparison of R-C system in different fields of view. (a) 0.15°; (b) 0.30°; (c) 0.45°

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Fig. 7. Comparison of results before and after restoration. (a) Image of before restoration; (b) image of after restoration; (c) local enlarged view of Fig. (a); (d) local enlarged view of Fig. (b)

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Fig. 8. Comparison of results before and after restoration of resolution plate. (a) Local enlarged view of Fig. (c); (b) local enlarged view of Fig. (b); (c) image of before restoration; (d) image of after restoration

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Fig. 9. MTF comparison curves before and after restoration. (a) Before restoration; (b) after restoration

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Table 1. Correspondence between Zernike polynomials and aberrations

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Table 1. Correspondence between Zernike polynomials and aberrations

Term	Zernike polynomial	Name
$Z_{0}^{0}$	1	Displacement
$Z_{1}^{1}$	Rcos θ	X-tilt
$Z_{1}^{- 1}$	Rsin θ	Y-tilt
$Z_{2}^{0}$	2R²-1	Defocus
$Z_{2}^{2}$	R²cos 2θ	0° astigmatism
$Z_{2}^{- 2}$	R²sin 2θ	45° astigmatism
$Z_{3}^{1}$	(3R³-2R)cos θ	X-coma
$Z_{3}^{- 1}$	(3R³-2R)sin θ	Y-coma
$Z_{4}^{0}$	6R⁴-6R²+1	Spherical aberration

Table 2. Index parameters of system
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Table 2. Index parameters of system
Parameter Content
F-number 4
Focal length /mm 1300
Field of view /(°) 0.9
Wavelength /nm 900--1700

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Hanqing Zheng, Qingfeng Cui, Yang Hu, Lin Sun, Yu Guo, Xudong Gao. Indirect Imaging Method of Ritchey-Chretien Optical System with Large Field of View[J]. Acta Optica Sinica, 2021, 41(5): 0522002

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