IOE OpenIR  > 光电技术研究所博硕士论文
Alternative TitleStudy on a Hartmann Wavefront Sensor with Adjustable Spatial Sampling Rate
Thesis Advisor饶学军,黄林海
Degree Grantor中国科学院大学
Place of Conferral中国科学院大学光电技术研究所
Degree Name工程硕士
Keyword波前探测 哈特曼波前传感器 球面波标定 变采样率 Matlab数值仿真


  本文对球面哈特曼传感器实现变采样率的诸多细节进行了讨论,分析了变采样率对球面哈特曼传感器的主要性能参数的影响,然后根据光波传播的角谱理论建立了球面哈特曼传感器的MATLAB数值仿真,并对球面哈特曼传感器的性能进行了讨论。最后,本文搭建了球面哈特曼传感器的简易实验平台,分别在强光环境和弱光环境下利用球面哈特曼传感器实现了变采样率测量。在强光环境下,球面哈特曼传感器的绝对测量精度(残差的RMS)优于1/25λλ =635nm),相对测量精度(残差的相对RMS)小于9%。在弱光环境下,球面哈特曼传感器通过降低采样率成功提高了测量精度,验证了球面哈特曼传感器可以通过变采样率提高对不同观测条件的适应能力。

Other Abstract

In astronomical adaptive optics, the observation condition is constantly changing. Hartmann wavefront sensor of high pupil sampling has a higher measurement accuracy under good observation conditions. when the observation condition is poor, only Hartmann wavefront sensor of low pupil sampling can measure the target object effectively. However, there are not many methods to adjust pupil sampling with classic Hartmann wavefront sensor, and all current methods have some shortcomings. Classic Hartmann wavefront sensor is calibrated with plane waves, which is not conducive to adjust pupil sampling. In this paper, Hartmann wavefront sensor calibrated with spherical wave (spherical Hartmann sensor) is studied, and a method to adjust pupil sampling is proposed.

In this paper, the details of adjusting pupil sampling based on spherical Hartmann sensor are discussed, and the influence of variable pupil sampling on the main performance parameters of spherical Hartmann sensor is analyzed. Based on the angular spectrum theory of light wave propagation, the MATLAB numerical simulation of spherical Hartmann sensor is established. And the performance of spherical Hartmann sensor is discussed by the MATLAB numerical simulation. Finally, a simple experimental platform of spherical Hartmann sensor is built in this work. With the platformthe measurement of adjustable pupil sampling by spherical Hartmann sensor is conducted under both strong light environment and low light environment. Under the strong light environment, the absolute measurement accuracy (RMS of the residual) of spherical Hartmann sensor is better than 1/25λ (λ=635nm), and the relative measurement accuracy (relative RMS of the residual) is below 9%. Under the low light environment, the measurement accuracy of spherical Hartmann sensor is improved by reducing the pupil sampling. It is verified that spherical Hartmann sensor with adjustable pupil sampling has better adaptability to different observation conditions.

Subject Area光学
MOST Discipline Catalogue工学::光学工程
Document Type学位论文
Recommended Citation
GB/T 7714
魏文举. 一种空间采样率可变的哈特曼波前传感器的研究[D]. 中国科学院大学光电技术研究所. 中国科学院大学,2019.
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