成像掩模探测器信号与波前相位平均梯度平方和线性关系验证  

Verification of Linear Dependence Between Imaging Masked Detector Signal and Mean Square Gradient of Wavefront Phase

作　　者：王斌 马良 杨慧珍[2] 龚成龙[2] Wang Bin;Ma Liang;Yang Huizhen;Gong Chenglong(School of Information and Control Engineering, China University of Mining and Technology Xuzhou, Jiangsu 221116, China;Department of Electronic Engineering, Huaihai Institute of Technology, Lianyungang, Jiangsu 222005, China)

机构地区：[1]中国矿业大学信息与控制工程学院,江苏徐州221116 [2]淮海工学院电子工程学院,江苏连云港222005

出　　处：《中国激光》2018年第6期122-126,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(11573011;61601194);江苏省高校"青蓝工程"中青年学术带头人资助项目;连云港市港城微.博双创计划(GCWB2007009)

摘　　要：基于模型的无波前探测自适应光学系统具有收敛速度快、校正效果好的优势,在实时波前校正中具有较大的应用潜力。成像掩模探测器信号S_(MD)与波前相位的平均梯度平方和S_(MG)之间的线性关系是系统控制算法设计的基础。为了验证S_(MD)和S_(MG)之间的线性关系,使用37单元压电变形镜、CCD相机和哈特曼传感器等主要元件建立自适应光学系统实验平台,其中利用变形镜产生波前畸变信息,利用CCD探测远场光强分布,利用哈特曼获取波前信息。基于获得的光强信息和波前畸变信息,分别计算S_(MD)值和S_(MG)值。实验结果验证了S_(MD)和S_(MG)之间的线性关系,且线性值为0.018,非常接近理论值1/(4π~2)。The model-based wavefront sensorless adaptive optics（AO）system has a great potential in real-time correction because of its fast convergence and good correction.The linear relationship between imaging masked detector signal SMDand mean square gradient of wavefront phase SMG is the theoretical basis of the system control algorithm.To verify the linear relationship,we establish an AO system experiment platform with a 37-element piezoelectric deformable mirror（DM）,a CCD camera and a Shack Hartmann sensor,in which the DM is used to generate wavefront aberration,the CCD camera is used to grab the distribution of far-field intensity and the Hartmann is used to get the information of wavefront.Based on the collected information of far-field intensity and the wavefront aberration,we calculate values of SMD and SMG,respectively.Experiment results show that SMD is linear to SMG and the slop is 0.018,which is very close to the theoretical value 1/（4π^2）.

关 键 词：自适应光学 远场光斑 波前像差 线性关系 

分 类 号：O439[机械工程—光学工程]