光学精密工程2018，Vol.26Issue(5)：1007-1013,7.DOI:10.3788/OPE.20182605.1007
349单元自适应光学波前处理器
Three hundred and fourty-nine unit adaptive optical wavefront processor
摘要
Abstract
In order to meet the correction frequency and imaging quality requirements of adaptive optics systems for large ground-based high-resolution imaging telescopes ,a 349-unit wavefront processor was designed ,which realized a wavefront correction frequency of 1500 Hz .The design of a real-time wavefront processor was proposed whose main components were a control computer , a FPGA wavefront slope processor ,a GPU matrix multiplication handler and a modularization D/A converter . A closed-loop calibration result of the dynamic aberration produced by the 349-unit adaptive optics system was reported .In this experiment ,the system realized an effective correction of the simulated atmospheric turbulence whose atmospheric coherent length r0 is 6 cm and the Greenwood frequency is 160 Hz .After the closed loop evaluation of the adaptive optics system ,the average square root value of 1000 frames of the wavefront aberration drops from 1 .07 λto 0 .11 λ(the central wavelength is 600 nm) .The proposed 349-unit adaptive optics system can achieve a higher imaging quality under the wavefront correction frequency of 1500 Hz .Moreover ,the wavefront processing delay is better than 235 μs . The analysis of the power spectrum reveals that this adaptive optics system can correct wavefront distortion which was less than 100 Hz .关键词
自适应光学/波前处理器/地基大口径望远镜/变形镜Key words
adaptive optics/wavefront processor/ground-based high-aperture telescope/deformable mirror分类
数理科学引用本文复制引用
王建立,董玉磊,姚凯男,林旭东,杨乐强,刘欣悦,王亮,陈璐..349单元自适应光学波前处理器[J].光学精密工程,2018,26(5):1007-1013,7.基金项目
国家自然科学基金资助项目(No .61605199 ,No .61601195) （No .61605199 ,No .61601195）
