中国物理B ›› 2014, Vol. 23 ›› Issue (3): 37801-037801.doi: 10.1088/1674-1056/23/3/037801

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Speckle intensity images of target based on Monte Carlo method

武颖丽, 吴振森   

  1. Xidian University, School of Science, Xi’an 710071, China
  • 收稿日期:2013-05-02 修回日期:2013-08-03 出版日期:2014-03-15 发布日期:2014-03-15
  • 基金资助:
    Project supported by the National Natural Sciences Foundation of China (Grant No. 61172031) and the Fundamental Research Funds for the Central Universities of China (Grant No. K50511070005).

Speckle intensity images of target based on Monte Carlo method

Wu Ying-Li (武颖丽), Wu Zhen-Sen (吴振森)   

  1. Xidian University, School of Science, Xi’an 710071, China
  • Received:2013-05-02 Revised:2013-08-03 Online:2014-03-15 Published:2014-03-15
  • Contact: Wu Ying-Li E-mail:ylwu@xidian.edu.cn
  • Supported by:
    Project supported by the National Natural Sciences Foundation of China (Grant No. 61172031) and the Fundamental Research Funds for the Central Universities of China (Grant No. K50511070005).

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摘要： Speckle intensity in the detector plane is deduced in the free-space optical system and imaging system based on Van Cittert–Zernike theorem. The speckle intensity images of plane target and conical target are obtained by using the Monte Carlo method and measured experimentally. The results show that when the range extent of target is smaller, the speckle size along the same direction become longer, and the speckle size increase with increasing incident light wavelengths. The speckle size increases and the speckle intensity images of target is closer to the actual object when the aperture scale augments. These findings are useful to access the target information by speckle in laser radar systems.

关键词: laser scattering, Monte Carlo method, speckle, intensity images

Abstract: Speckle intensity in the detector plane is deduced in the free-space optical system and imaging system based on Van Cittert–Zernike theorem. The speckle intensity images of plane target and conical target are obtained by using the Monte Carlo method and measured experimentally. The results show that when the range extent of target is smaller, the speckle size along the same direction become longer, and the speckle size increase with increasing incident light wavelengths. The speckle size increases and the speckle intensity images of target is closer to the actual object when the aperture scale augments. These findings are useful to access the target information by speckle in laser radar systems.

Key words: laser scattering, Monte Carlo method, speckle, intensity images

中图分类号:  (Laser ultrasonics)

  • 78.20.hc
78.20.Ek (Optical activity) 78.20.Bh (Theory, models, and numerical simulation) 78.68.+m (Optical properties of surfaces)