拼接式望远镜子镜间平移、倾斜误差及子镜间隙对成像质量的影响

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。

Abstract

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 deviation δ increasing gradually becomes poor; when δ < 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.

参考文献

[1] 苏定强,崔向群. 主动光学—新一代大望远镜的关键技术 [J]. 天文学进展,1999,17(1):1-14.

SU Dingqiang,CUI Xiangqun. Active Optics—Key Technology of the New Generation Telescope [J]. Progress in Astronomy,1999,17(1):1-14.

[2] Manhart P K, Rodgers J M. Segmented Mirror ,Manufacturing and Alignment Tolerance(SMMAT) [J]. Proc. of SPIE(S0277-786X),1989,4:387-405.

[3] 陈旗海,王治乐,张伟. 光学合成孔径成像系统子孔径像差研究 [J]. 应用光学,2008,27(2):112-115.

CHEN Qihai,WANG Zhile,ZHANG Wei. Study on Subaperture Aberration of Optical Synthetic aperture Imaging System[J].Journal of Applied Optics,2008,27(2):112-115.

[4] Baiocchi D,Burge J H. Radius of Curvature Metrology for Segmented Mirrors [J]. Proc. of SPIE(S0277-786X),2000,4093:58-67.

[5] Chanan G,Troy M. Strehl Ratio and Modulation Transfer Function for Segmented Mirror Telescope as Function of Segment Phase Error [J]. Applied Optics(S1539-4522),1999,38(31):6642-6647 .

[6] Yaitskova N,Dohlen K,Dierickx P. Analytical study of Diffraction Effects in Extremely Large Segmented Telescopes [J].JOSA A(S1084-7529),2003,20(8):1563-1575 .

[7] 刘政,王胜千,饶长辉,等. 相位平移误差与子孔径自身像差对稀疏光学合成孔径系统成像质量的综合影响分析 [J]. 物理学报,2011,60(10):100702.

LIU Zheng,WANG Shengqian,RAO Changhui,et al. Analysis of Comprehensive Effects of Piston Error and Sub-aperture Aberrations on The Image Quality of Sparse-Optical-Synthetic-Aperture System [J]. Acta Physics Sinca,2011,60(10):100702.

[8] 张伟,邓键,龙夫年,等. 拼接镜面合成孔径光学系统的像质评价 [J]. 光学精密工程,2008,16(2):208-214.

ZHANG Wei,DENG Jian,LONG Funian,et al. Imaging Quality of Segmented Mirror Synthetic Aperture Optics [J]. Optics and Precision Engineering,2008,16(2):208-214.

[9] 沈婷婷,吴泉英,钱霖,等. Golay6 结构径向平移误差分析 [J]. 激光与光电子进展,2012,49:091101.

SHEN Tingting,WU Quanying,QIAN Lin,et al. Analysis of Piston Error for the Golay6 Configuration [J]. Laser & Optoelectronics Progress,2012,49:091101.

[10] 陈荣利,张涛,马臻,等. 拼接误差对拼接式大口径反射镜成像质量的影响 [J]. 光子学报,2009,38(12):3240-3245.

CHEN Rongli,ZHANG Tao,MA Zhen,et al. Influences of the Alignment Errors on Image Quality of Large Segmented Mirrors [J]. Acta photonic sincia,2009,38(12):3240-3245.

[11] 吕乃光. 傅里叶光学 [M]. 北京:机械工业出版社,2008:65-116.

Lü Naiguang. Fourier Optics [M]. Beijing:China Machine Press,2008:65-116.

[12] Yaitskova N,Dohlen K. Simulation of Imaging Performance for Extremely Large Segmented Telescopes [J]. Proc. of SPIE(S0277-786X),2000,4003:279-290.

[13] Yaitskova N,Dohlen K. Tip-tilt Error for Extremely Large Segmented Telescopes:Detailed Theoretical Point-Spread-Function Analysis and Numerical Simulation Results [J]. JOSA A(S1084-7529),2002,19(7):1274-1285.

王金, 鲜浩, 王胜千, 周龙峰, 李斌. 拼接式望远镜子镜间平移、倾斜误差及子镜间隙对成像质量的影响[J]. 光电工程, 2014, 41(10): 55. WANG Jin, XIAN Hao, WANG Shengqian, ZHOU Longfeng, LI Bin. Effects of Piston, Tip-tilt and Gap Errors on Image Quality of the Segmented Telescope[J]. Opto-Electronic Engineering, 2014, 41(10): 55.

拼接式望远镜子镜间平移、倾斜误差及子镜间隙对成像质量的影响

关于本站 Cookie 的使用提示

全站搜索

拼接式望远镜子镜间平移、倾斜误差及子镜间隙对成像质量的影响

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索