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Beam steering uncertainty analysis for Risley prisms based on Monte Carlo simulation

机译：基于Monte Carlo仿真的Risley Prisms光束转向不确定性分析

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摘要

The Risley-prism system is applied in imaging LADAR to achieve precision directing of laser beams. The image quality of LADAR is affected deeply by the laser beam steering quality of Risley prisms. The ray-tracing method was used to predict the pointing error. The beam steering uncertainty of Risley prisms was investigated through Monte Carlo simulation under the effects of rotation axis jitter and prism rotation error. Case examples were given to elucidate the probability distribution of pointing error. Furthermore, the effect of scan pattern on the beam steering uncertainty was also studied. It is found that the demand for the bearing rotational accuracy of the second prism is much more stringent than that of the first prism. Under the effect of rotation axis jitter, the pointing uncertainty in the field of regard is related to the altitude angle of the emerging beam, but it has no relationship with the azimuth angle. The beam steering uncertainty will be affected by the original phase if the scan pattern is a circle. The proposed method can be used to estimate the beam steering uncertainty of Risley prisms, and the conclusions will be helpful in the design and manufacture of this system.'
机译：Risley-Prism系统应用于Ladar的成像，实现激光束的精确指示。 LADAR的图像质量深受Risley Prisms的激光束转向质量的影响。使用射线跟踪方法来预测指向误差。通过旋转轴抖动和棱镜旋转误差的影响，通过Monte Garlo模拟来研究Risley Prisms的光束转向不确定性。案例示例阐明了指向误差的概率分布。此外，还研究了扫描图案对光束转向不确定性的影响。结果发现，对第二棱镜的轴承旋转精度的需求比第一棱镜的轴承旋转精度更加严格。在旋转轴抖动的效果下，关于旋转轴抖动的指向不确定性与新出现光束的高度角度有关，但它与方位角没有关系。如果扫描模式是圆形，则光束转向不确定性将受到原始阶段的影响。该方法可用于估计Risley Prisms的光束转向的不确定性，并且结论将有助于该系统的设计和制造。

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  • 来源
    《Optical engineering》 |2017年第1期|014105.1-014105.10|共10页
  • 作者

    Hao Zhang; Yan Yuan; Lijuan Su; Fengzhen Huang;

  • 作者单位

    Beihang University Key Laboratory of Precision Opto-Mechatronics Technology of Ministry of Education School of Instrumentation Science and Opto-Electronics Engineering Xueyuan Road No. 37 Haidian District Beijing 100191 China;

    Beihang University Key Laboratory of Precision Opto-Mechatronics Technology of Ministry of Education School of Instrumentation Science and Opto-Electronics Engineering Xueyuan Road No. 37 Haidian District Beijing 100191 China;

    Beihang University Key Laboratory of Precision Opto-Mechatronics Technology of Ministry of Education School of Instrumentation Science and Opto-Electronics Engineering Xueyuan Road No. 37 Haidian District Beijing 100191 China;

    Beihang University Key Laboratory of Precision Opto-Mechatronics Technology of Ministry of Education School of Instrumentation Science and Opto-Electronics Engineering Xueyuan Road No. 37 Haidian District Beijing 100191 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Risley prisms; beam steering uncertainty; Monte Carlo method;

    机译：丽斯利棱镜;光束转向不确定性;蒙特卡罗方法;

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