激光与光电子学进展, 2020, 57 (8): 081101, 网络出版: 2020-04-03
间隙及掩模偏心对采用理想模板窄带算法共相拼接镜的影响 下载: 1092次
Effects of Gap and Decenter of Mask on Narrow-Band Algorithm with Ideal Templates for Co-Phasing a Segmented Mirror
成像系统 拼接望远镜 平移误差测量 间隙 掩模偏心 窄带算法 imaging systems segmented telescope piston error measurement gap decenter of mask narrow-band algorithm
摘要
分析间隙及偏心影响下的子孔径远场光斑形态变化,并探索采用理想圆孔径模板库匹配含间隙及偏心孔径的远场图样进行共相的可行性及适用范围。数值仿真了不同间隙及不同掩模偏心下的远场光斑形态,得到了二者对远场形态的影响趋势;数值模拟了采用理想模板窄带共相的过程,分析了不同间隙及不同掩模偏心下,不同平移误差的共相精度。研究表明,间隙越大,远场扩展范围越宽;偏心越大,远场受平移误差调制的效应越不明显;当间隙比例因子或偏心比例因子不超过0.3时,可直接采用理想模板共相。该研究拓展了窄带共相算法的应用,为深入研究窄带共相算法提供了相应基础。
Abstract
In this study, we analyze the changes in the spot morphology of the far field of the subaperture under the influence of gap and decenter of mask and explore the feasibility and applicable conditions of using the ideal circular aperture template library to match the far-field pattern generated by circular templates with gap and decenter for co-phasing. Further, the shape of the far-field is numerically simulated under different gaps and decenters of mask. The usage of ideal template narrow-band co-phasing is numerically simulated, and the co-phase accuracy of different piston errors under different gaps and decenters of mask is analyzed. The results prove that the far-field extension range will increase with the increasing gap. The larger the decenter of mask is, the less obvious the far-field effect modulated by the piston error will be. The ideal co-phase template can be directly adopted when the gap scaling factor or decenter scaling factor does not exceed 0.3. In this study, we expand the application of the narrow-band co-phase algorithm and provide the basis to further study this algorithm.
张永峰, 鲜浩. 间隙及掩模偏心对采用理想模板窄带算法共相拼接镜的影响[J]. 激光与光电子学进展, 2020, 57(8): 081101. Yongfeng Zhang, Hao Xian. Effects of Gap and Decenter of Mask on Narrow-Band Algorithm with Ideal Templates for Co-Phasing a Segmented Mirror[J]. Laser & Optoelectronics Progress, 2020, 57(8): 081101.