Analysis of power spectra for laser scattering intensity on rotating cylinder targets

WU Ying-li; WU Zhen-sen

doi:10.3788/OPE.20122012.2654

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Analysis of power spectra for laser scattering intensity on rotating cylinder targets

Article | 更新时间：2020-08-13

- Analysis of power spectra for laser scattering intensity on rotating cylinder targets
- Optics and Precision Engineering Vol. 20, Issue 12, Pages: 2654-2660(2012)
- 作者机构：
  
  西安电子科技大学理学院,陕西西安 710071
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20122012.2654
  CLC： O436;TN241
- Received：15 August 2012，
  
  Revised：24 September 2012，
  
  Published：10 December 2012
- 稿件说明：
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武颖丽, 吴振森. 旋转粗糙圆柱的激光散射功率谱分析[J]. 光学精密工程, 2012,20(12): 2654-2660

WU Ying-li, WU Zhen-sen. Analysis of power spectra for laser scattering intensity on rotating cylinder targets[J]. Editorial Office of Optics and Precision Engineering, 2012,20(12): 2654-2660
武颖丽, 吴振森. 旋转粗糙圆柱的激光散射功率谱分析[J]. 光学精密工程, 2012,20(12): 2654-2660 DOI： 10.3788/OPE.20122012.2654.

WU Ying-li, WU Zhen-sen. Analysis of power spectra for laser scattering intensity on rotating cylinder targets[J]. Editorial Office of Optics and Precision Engineering, 2012,20(12): 2654-2660 DOI： 10.3788/OPE.20122012.2654.

摘要

建立了圆柱旋转激光散斑功率谱的理论模型以实现粗糙目标光学无损测量的方法。首先

根据粗糙面激光散射特征

研究了平行光束照射匀速旋转的圆柱表面时其反射空间形成的动态散斑特性

给出了接收场散斑强度起伏互相关函数及其功率谱密度函数的理论模型

以及动态散斑场的相干长度和接收信号带宽。接着

分析了旋转引起的散斑平移和散斑沸腾对接收信号带宽的影响。最后

测量了旋转圆柱准镜向及漫射部分的散斑图像。结果显示:当0.633 m入射光波照射半径为1 mm的圆柱时

频率为10 Hz的旋转圆柱自相关函数的相关时间约为4 ms

而20 Hz的旋转圆柱自相关函数对应的相关时间为2 ms左右。结果表明

在动态散斑场中

多普勒效应和散斑平移效应引起的带宽约为同一个量级

而散斑沸腾效应可以忽略。

Abstract

A mathematical model for the power spectrum density function of dynamic speckles was established to complete the nondestructive measurement of a diffuse target. First

the dynamic speckle characteristics formed by the reflection space of a rotating cylinder at an immobile angular velocity were discussed when it was fully illuminated by a collimated light beam. The theoretical model on the cross-correlation function and the power spectrum density function of dynamic speckle intensity fluctuation was given and the coherent length and receiving signal bandwidth of the dynamic speckle field were described. Then

the impacts of speckle translation and speckle boiling caused by rotation cylinder on the received signal bandwidth were analyzed. Finally

the near-specula of the cylinder and the diffuse speckle patterns were measured. Obtained results indicate that when the wavelength of 0.633 m is shone on the cylinder with a diameter of 1 mm

the correlation time of autocorrelation function is 4 ms for a 10 Hz rotating cylinder and 2.0 ms for a 20 Hz rotating cylinder. In conclusion

the Doppler effects and speckle translation effects in the speckle dynamic field can produce the bandwidth with the same order of magnitude

and the speckle boiling effect can be negligible.

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references

陈辉. 粗糙物体高斯波束散射及在激光一维距离成像中的应用. 西安:西安电子科技大学学位论文, 2004. CHEN H. Scattering of Gaussian beam by object with rough surface and its application on laser one dimensional range profile.Xi'an:Xi Dian University. (in Chinese)[2] BANKMAN I. Analytical model of Doppler spectra of coherent light backscattered from rotating cones and cylinders [J].J. Opt. Soc. Am. A,2000,17(3):465-476.[3] MINDEN M L, KOST A, BRUESSEBACH H W. A range resolved Doppler imaging sensor based on fiber laser [J]. IEEE, 1997, 3(4):1080-1086.[4] 王广君, 田金文, 柳健. 激光成像雷达前视成像仿真及障碍物识别方法研究[J]. 红外与激光工程, 2001,30(6):462-465. WANG G J, TIAN J W, LIU J. The front view imaging simulation of imaging laser radar and the obstacles identification approach [J]. Infrared and Laser Engineering, 2001,30(6):462-465. (in Chinese)[5] 郭冠军, 邵芸. 激光散斑效应对激光雷达探测性能的影响[J]. 物理学报, 2004, 53(7):2089-2093. GUO G J, SHAO Y. Rough surfaces induced speckle effects on detection performance of pulsed laser radar [J]. Acta Physica Sinica, 2004, 53(7):2089-2093. (in Chinese)[6] BRIERS J D. Laser Doppler and time varying speckle: reconciliation [J]. J. Opt. Soc. Am. A, 1996, 13(2):345-350.[7] 程传福, 宋洪胜, 刘春香,等. 基于电磁场积分方程数值求解法的光学近场散斑及其一阶统计特性[J]. 中国科学(G), 2004,34(1):15-28. CHENG CH F, SONG H SH, LIU CH X, et al.. The optical near field speckles and their first order statistics on the basis of the integral equations of electromagnetic field [J]. Science in China,Ser (G), 2004,34(1):15-28. (in Chinese)[8] YURA H T, HANSON S G, LADING L. Laser Doppler velocimetry: analytical solution to the optical system including the effects of partial coherence of the target [J]. J. Opt. Soc. Am. A, 1995, 12(9):2040-2407.[9] WANG J Y. Lidar signal fluctuations caused by beam translation and scan[J]. Applied Optics, 1986,25(17):2878-2885.[10] GOODMAN J W. Statistical Optics[M]. New York:John Wiley & Sons, Inc., 1985:1-28.[11] ERDMAN, JOACHIM C. Speckle field of curved, rotating surfaces of Gaussian roughness illuminated by a laser spot [J]. J. Opt. Soc. Am.A, 1976,66(11):1194-1204.[12] LYNM J, SMITH. Far-field speckle and Doppler shifts for rough laser-illuminated rotating cylinders [J]. Applied Optics, 1979,18(6):755-756.

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