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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

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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SMD与波前相位的平均梯度平方和SMG 之间的线性关系是系统控制算法设计的基础。为了验证SMD和SMG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SMD值和SMG值。实验结果验证了SMD和SMG之间的线性关系,且线性值为0.018,非常接近理论值1/(4π2)。

Abstract

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 SMD and 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/(4π2).

Newport宣传-MKS新实验室计划
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中图分类号:O439

DOI:10.3788/cjl201845.0605001

所属栏目:光束传输与控制

基金项目: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)

收稿日期:2017-10-31

修改稿日期:2017-12-07

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王斌:中国矿业大学信息与控制工程学院, 江苏 徐州 221116
马良:中国矿业大学信息与控制工程学院, 江苏 徐州 221116
杨慧珍:淮海工学院电子工程学院, 江苏 连云港 222005
龚成龙:淮海工学院电子工程学院, 江苏 连云港 222005

联系人作者:杨慧珍(yanghz526@126.com)

备注:王斌(1991—),男,硕士研究生,主要从事自适应光学技术方面的研究。E-mail: 1096142993@qq.com

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引用该论文

Wang Bin,Ma Liang,Yang Huizhen,Gong Chenglong. Verification of Linear Dependence Between Imaging Masked Detector Signal and Mean Square Gradient of Wavefront Phase[J]. Chinese Journal of Lasers, 2018, 45(6): 0605001

王斌,马良,杨慧珍,龚成龙. 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[J]. 中国激光, 2018, 45(6): 0605001

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