Active Alignment Modeling and Analysis of Chinese Giant Solar Telescope

Table 1. Error propagation factors of RBDOF
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Table 1. Error propagation factors of RBDOF
EPF Description Value Unit
h₁ Decenter of x direction 2.5739
h₂ Decenter of y direction 2.5739
h₃ Tilt of x direction 0.1673 (″)·μm^-1
h₄ Tilt of y direction 0.1673 (″)·μm^-1
h₅ Position of z direction 0.4203

Table 2. Error propagation factor of aberration coefficient

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Table 2. Error propagation factor of aberration coefficient

ZEPF	Description	(h_x=0,h_y=0)	(h_x=1,h_y=0)
k₁	Defocus	0.0171	0.0171
k₂	Astigmatism of 0°	0	0.0004
k₃	Astigmatism of 45°	0	0.0004
k₄	Coma of y direction	0.0083	0.0083
k₅	Coma of x direction	0.0051	0.0051
k₆	Trefoil of x direction	0	0
k₇	Trefoil of y direction	0	0

Table 3. Wavefront RMS of alignment error caused by local atmospheric turbulenceunit: λ
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Table 3. Wavefront RMS of alignment error caused by local atmospheric turbulenceunit: λ
IMF /Hz $C_{n}^{2}$ =10^-15 m^-2/3 $C_{n}^{2}$ =10^-14 m^-2/3 $C_{n}^{2}$ =1 ${0^{- 1}}^{3}$ m^-2/3
10.0 0.0065 0.0211 0.0662
1.0 0.0038 0.0122 0.0382
0.1 0.0012 0.0041 0.0128

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Yu Fu, Shu Yuan, Zhenyu Jin, Zhong Liu. Active Alignment Modeling and Analysis of Chinese Giant Solar Telescope[J]. Acta Optica Sinica, 2022, 42(12): 1211002

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