Analysis and Research on End-to-end Optical Image Quality of Large Aperture Off-axis Space Telescope

doi:10.16182/j.issn1004731x.joss.21-0582

Abstract

Abstract:

In order to evaluate the image quality of space on orbit telescope under the comprehensive constraints, the chain calculation analysis method is adopted. The main error factors of the optical image quality degradation are divided into six static errors and two dynamic errors. After calculation, the optical system wavefront aberration under the static loading error is reduced to 0.057λ on average. Under the influence of the static and dynamic errors, the 80% energy concentration of point spread function increases gradually. The method can be used to analyze and evaluate the influence of image stabilization control and precise temperature control on the image quality of space telescope,and can identify the key factors that restricting the high image quality of space telescope.

Key words: chain, space telescope, optical image quality, point spread function(PSF)

CLC Number:

TP391

Zhang Ban, Xiaobo Li, Xun Yang, Yuxi Jiang. Analysis and Research on End-to-end Optical Image Quality of Large Aperture Off-axis Space Telescope[J]. Journal of System Simulation, 2022, 34(10): 2255-2263.

Figures/Tables 10

Fig. 1

Fig. 2

Fig. 3

Table 1

Fig. 4

Fig. 5

Table 2

Comparison of wavefront aberration and 80% energy concentration degradation of point spread function caused by static errors

静态误差项	波前退化量	80%能量集中度退化量/(")
光学设计系统	优于 $λ$ /30	优于0.1
重力变化	0.025 3 $λ$	0.009 5
温度变化	0.023 0 $λ$	0.017 9
安装不平度	0.024 0 $λ$	0.003 5
装调误差	0.013 7 $λ$	0.004 4
加工制造	0.033 6 $λ$	0.022 9

Table 2

Fig. 6

Fig. 7

Fig. 8

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光学组件	ΔX/μm			ΔRX/(″)			ΔY/μm			ΔRY/(″)			ΔZ/μm			ΔRZ/(″)
光学组件	温度	重力	装调	温度	重力	装调	温度	重力	装调	温度	重力	装调	温度	重力	装调	温度	重力	装调
M₁	1.90	-21	0.01	-0.06	0.62	0.01	2.63	2.40	0.15	0.10	0.48	0.01	-0.20	0.26	0.06	-0.07	0.34	-0.01
M₂	3.35	-82	-209	-0.55	-2.95	-18.50	-1.75	-0.08	-362	-0.09	-1.08	11.20	-0.15	-1.42	94.63	-0.07	7.02	0.02
M₃	-0.47	-14.6	51.70	-0.03	0.07	-58.90	3.46	0.78	256	-0.08	0.20	37.20	3.09	2.96	19.55	0.24	-1.74	0.16
M₄	-0.50	-171	-0.06	0.03	0.36	187	-1.79	-22.20	-0.28	-0.08	19.10	-101	2.20	18.40	-136	-0.91	7.06	-0.03
像面	0.40	-26.7	0.03	-1.23	-0.39	-0.01	0.33	-4.93	0.05	-0.26	-4.31	0.01	1.44	7.76	0.01	0.17	1.84	0.06

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