摘要
描述了基于线性相位反演算法的波前传感器的基本组成结构。在实验室内搭建了相应的演示验证实验装置,对该种新型波前测量方法的特性进行了实验研究。实验计算结果表明:这种根据入射全孔径远场光斑强度分布直接反演出入射波前相位的线性相位反演新方法原理是可行的。只需实时测量一幅焦平面图像,根据焦平面上光强分布的微小变化量与入射孔径面上的相位分布的微小变化量之间存在的近似线性关系,就可以用模式复原的原理复原出入射波前相位。传感器对于离焦,像散等像差模式都可以进行较为准确的测量,误差率都小于1。对称系统像差中存在少量的非对称像差对复原结果的准确性影响不大。
The principal construction of wave-front sensor developed from the linear phase retrieval algorithm is described in this paper. In the laboratory, an experiment device was set up to study the characteristic of the new wave-front measuring method using this kind of sensor. The real time intensity in focus was measured,and then the incident wave-front phase was easily recovered using the approximately linear relationship between the little change of focus intensity and the little change of phase. The sensor can do comparatively precise measurement on the aberration of defocus,astigmatism and so on, with error rates less than 1. It doesn＇t influence the veracity of recovered results much even if there exists a small unsymmetrical aberration in the aberration of the symmetrical system.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2007年第4期611-615,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金资助课题(60408005)
关键词
线性相位反演
波前测量
成像探测
传感器结构
验证实验
Linear phase-retrieval
Wave-front sensing
Image sensing
Sensor structure
Validating experiment
