Volume 45 Issue 7
Aug.  2016
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Chen Bo, Yang Jing, Li Xinyang, Yang Xu, Li Xiaoyang. Digital fast correction of wavefront distortion in active imaging with coherent light illumination[J]. Infrared and Laser Engineering, 2016, 45(7): 732001-0732001(5). doi: 10.3788/IRLA201645.0732001
Citation: Chen Bo, Yang Jing, Li Xinyang, Yang Xu, Li Xiaoyang. Digital fast correction of wavefront distortion in active imaging with coherent light illumination[J]. Infrared and Laser Engineering, 2016, 45(7): 732001-0732001(5). doi: 10.3788/IRLA201645.0732001

Digital fast correction of wavefront distortion in active imaging with coherent light illumination

doi: 10.3788/IRLA201645.0732001
  • Received Date: 2015-11-08
  • Rev Recd Date: 2015-12-13
  • Publish Date: 2016-07-25
  • Considering the wavefront aberration in active imaging with coherent light illumination and spatial heterodyne detection, a digital fast correction technique was proposed. An experimental setup was established, and the target scattering optical complex amplitude on the detection aperture was divided into four sub regions through the numerical segmentation. The high order aberrations in the sub regions were corrected in parallel with tochastic parallel gradient descent algorithm, and then the piston, tip and tilt wavefront aberration among the sub regions were corrected in parallel. The experimental results show that, 600 iterations is needed when the stochastic parallel gradient descent algorithm is used directly, while only 100 iterations is needed for this method proposed in the paper, and the amount of computation is smaller, so that the efficiency of correction is greatly improved.
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    [4] Chen Bo, Yang Xu, Li Xiaoyang. Wavefront correction in the active imaging system based on spatial heterodyne detection[C]//SPIE, 2015, 9622:96221E.
    [5] Li Junchang, Song Qinghe, Picart Pascal, et al. Discussion of wavefront reconstruction algorithm of off-axis digital holography[J]. Chinese Journal of Lasers, 2014, 41(2):0209008. (in Chinese)李俊昌, 宋庆和, Picart Pascal, 等. 离轴数字全息波前重建算法讨论[J]. 中国激光, 2014, 41(2):0209008.
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    [7] Ma Huimin, Zhang Jinghui, Zhang Pengfei, et al. Simulation of turbulence aberration correction based on stochastic parallel gradient descent algorithm[J]. Infrared and Laser Engineering, 2011, 40(9):1738-1742. (in Chinese)马慧敏, 张京会, 张鹏飞, 等. 基于随机并行梯度下降算法的湍流像差校正仿真[J]. 红外与激光工程, 2011, 40(9):1738-1742.
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    [10] Chen Bo, Yang Jing, Yang Xu, et al. Effect of speckle noise on wavefront distortion correction in laser active imaging[J]. Chinese Journal of Lasers, 2015, 42(10):1012002. (in Chinese)陈波, 杨靖, 杨旭, 等. 激光主动成像中散斑噪声对波前畸变校正性能的影响[J]. 中国激光, 2015, 42(10):1012002.
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Digital fast correction of wavefront distortion in active imaging with coherent light illumination

doi: 10.3788/IRLA201645.0732001
  • 1. School of Electrical Engineering,North China University of Science and Technology,Tangshan 063009,China;
  • 2. Library,North China University of Science and Technology,Tangshan 063009,China;
  • 3. Laboratory on Adaptive Optics,Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China

Abstract: Considering the wavefront aberration in active imaging with coherent light illumination and spatial heterodyne detection, a digital fast correction technique was proposed. An experimental setup was established, and the target scattering optical complex amplitude on the detection aperture was divided into four sub regions through the numerical segmentation. The high order aberrations in the sub regions were corrected in parallel with tochastic parallel gradient descent algorithm, and then the piston, tip and tilt wavefront aberration among the sub regions were corrected in parallel. The experimental results show that, 600 iterations is needed when the stochastic parallel gradient descent algorithm is used directly, while only 100 iterations is needed for this method proposed in the paper, and the amount of computation is smaller, so that the efficiency of correction is greatly improved.

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