基于线性双向脉动阵列的自适应光学波前复原  

Wavefront reconstruction used for adaptive optics system on a linear and bidirectional systolic array

作　　者：郑文佳[1] 王春鸿[1] 姜文汉[1] 李梅[1] 唐端午[1] 

机构地区：[1]中国科学院光电技术研究所

出　　处：《红外与激光工程》2007年第6期936-940,共5页Infrared and Laser Engineering

基　　金：国家863高技术基金资助项目(2006AA802206)

摘　　要：针对自适应光学系统,提出了一种基于线性双向流水脉动阵列的快速波前复原方法。该方法结合直接斜率波前复原算法和线性双向脉动阵列工作特点,通过对复原矩阵进行PCT数据变换和引入资源共享,提高了阵列的单元利用率,减少了资源占用且保证了计算的实时性,同时具有阵列结构简单规整、模块性强、可扩展性好等优点。最后在FPGA上实现了61单元48子孔径自适应光学系统的波前复原,验证了方法的可行性。In view of adaptive optical system, a method of fast wavefront reconstruction on a linear and bidirectional systolic array is proposed. According to the characteristics of direct-gradient wavefront reconstruction algorithm and the work characteristics of bidirectional systolic array, PCT data translation on reconstruction matrix and resource sharing are done in order to make highly efficient use of systolic array in implementing wavefront reconstruction. The method has the following advantages： real-time calculation, economical hardware resources usage, simple and regular structure, high modularity degree, and strong expansibility.At last the 61-element and 48 sub-apertures adaptive optical system wave-front reconstruction is implemented on FPGA with bidirectional systolic array.Experimental result indicates that the method used for fast wavefront reconstruction is valid.

关 键 词：自适应光学 波前复原 脉动阵列 资源共享 

分 类 号：O439[机械工程—光学工程]