摘要
分别采用 Zernike和 Karhunen-Loeve两种模式波前复原法 ,分析了在子孔径斜率测量噪声影响下 ,哈特曼传感器对大气湍流畸变波前的模式复原误差与模式复原阶数等的关系。发现最优模式复原阶数主要与哈特曼传感器的子孔径斜率探测信噪比有关。分析了一个哈特曼传感器对实际大气湍流畸变波前的测量结果 ,给出了确定传感器测量噪声的方法。
Using the Zernike and the Karhunen-Loeve modal reconstruction algorithm, three kinds of reconstruction error of a Hartmann sensor measuring the atmosphere disturbed wavefront was analyzed: the mode coupling error, the mode cutting error and the error causing by measurement noise. The experiment data of a practical Hartmann sensor were analyzed in this paper too. It is showed that the optimal mode number was associated with the signal to noise ratio (SNR), and the Hartmann sensor was suffered from measurement noise severely in the condition of weak turbulence.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2000年第3期319-323,共5页
High Power Laser and Particle Beams
基金
国家 8 63激光技术领域资助课题
关键词
哈特曼传感器
大气湍流
波前复原
自适应光学
Hartmann wavefront sensor
atmospheric turbulence
measurement noise
wavefront reconstruction
Zernike model
Karhunen-Loeve model
