应用于低对比度扩展目标观测的大型阵列太阳自适应光学电子系统的设计与实现  

The Design of Large Array Solar Adaptive Optics Electronic System for Observation of Low Contrast Extended Object

作　　者：费玮玮[1] 王长清[2] 刘濮鲲[1] 蔡惠智[2] 姜爱民[3] 唐清善[2] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院声学研究所,北京100190 [3]中国科学院国家天文台,北京100012

出　　处：《电子与信息学报》2010年第12期2987-2992,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(10778628)资助课题

摘　　要：自适应光学由于能够显著提高空间分辨率,在天文观测领域日益得到广泛的应用。与通常应用于恒星观测的夜天文自适应光学技术相比,对太阳表面低对比度扩展目标的观测校正一直是自适应光学中的难点。该文针对太阳观测中的低对比度扩展目标特性,采用FFT协方差相关算法,初步实现了大型阵列自适应光学电子系统。该系统采用阵列DSP和FPGA协同工作的架构,由低阶相关跟踪系统和高阶波前处理系统两部分组成。初步实验结果表明,系统能够满足预先设计的要求,并且具有较好的灵活性、通用性和扩展性。Adaptive optics has wide applications in astronomical observation realm because of its high capacity in improving the spatial resolution. Compared with night astronomical adaptive technology for star observation, the observation and correction for low contrast extended target at the solar surface is always a difficulty in adaptive optics. In reference to low contrast extended character of adoptive optics in solar observation, FFT correlation coefficients algorithm is utilized and a large array adaptive optoelectronic system is designed. The system, with DSP＋FPGA architecture, consists of low-order correlation tracking part and high-order wave-front processing part. The experimental result shows that the system well satisfies pre-design requirements and thus demonstrates good flexibility, versatility and scalability of the scheme.

关 键 词：太阳自适应光学 扩展目标 协方差相关算法 波前处理 相关跟踪 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置] TP302[自动化与计算机技术—控制科学与工程]