CAJ | 학술논문

通过理论及数值仿真分析拼接式望远镜中子镜的平移误差、倾斜误差和子镜间隙对系统成像质量的影响。理论推导了存在不同误差时拼接式望远镜点扩散函数(PSF)及远场光斑斯特列尔比(S.R，用RS.R表示)的表达式，建立了三种误差对拼接式望远镜PSF和远场光斑RS.R的影响的仿真模型，分析了三种误差分别对拼接式望远镜成像质量的影响。分析结果表明：当子镜存在平移误差时，拼接式望远镜成像质量随着子镜平移误差标准差δ增加逐渐变差，当δ<λ/20时，拼接式望远镜远场光斑RS.R>0.9；当子镜存在倾斜误时，拼接式望远镜成像质量随着波前相位均方差(RMS，用erms表示)增加逐渐变差，当erms<0.3 rad时，拼接式望远镜远场光斑RS.R>0.9；当子镜间存在间隙时，拼接式望远镜成像质量随着间隙因子w增大逐渐变差，当w<0.025时，拼接望远镜远场光斑RS.R>0.9。
통과이론급수치방진분석병접식망원경중자경적평이오차、경사오차화자경간극대계통성상질량적영향。이론추도료존재불동오차시병접식망원경점확산함수(PSF)급원장광반사특렬이비(S.R，용RS.R표시)적표체식，건립료삼충오차대병접식망원경PSF화원장광반RS.R적영향적방진모형，분석료삼충오차분별대병접식망원경성상질량적영향。분석결과표명：당자경존재평이오차시，병접식망원경성상질량수착자경평이오차표준차δ증가축점변차，당δ<λ/20시，병접식망원경원장광반RS.R>0.9；당자경존재경사오시，병접식망원경성상질량수착파전상위균방차(RMS，용erms표시)증가축점변차，당erms<0.3 rad시，병접식망원경원장광반RS.R>0.9；당자경간존재간극시，병접식망원경성상질량수착간극인자w증대축점변차，당w<0.025시，병접망원경원장광반RS.R>0.9。
The impact of segmented telescope piston error, tip-tilt error and gap on image quality by theoretical and numerical simulation was analyzed. Different error segmented telescope Point-spread-function (PSF) and the far-field spot Strehl Ratio (S.R) expression were derived theoretically. Then, set up simulation model about three kinds of error effect on segmented telescope PSF and far-field spot S.R, and analyzed three kinds of error influence on imaging quality of splicing telescope. Analysis results show that:when the segmented mirror exist piston error, segmented telescope image quality with piston error standard deviationδincreasing gradually becomes poor;whenδ<λ/20 segmented telescope, the far field spot RS.R>0.9;when the segmented mirror exist tip-tilt error, the segmented telescope imaging quality with the wavefront phase RMS increases gradually worse, when eRMS<0.3 rad, the far-field spot of the segmented telescope RS.R>0.9; when the segmented mirror exist gap, its imaging quality with the gap factor w increases gradually becomes poor, and when w<0.025, a segmented telescope far-field spot RS.R>0.9.