Statistical analysis of interferometric imaging system with rotating diffuser

被引：6
|
作者：
Xu J. [1 ]
Liu Z. [2 ]
Du Y. [2 ]
Chai L. [2 ]
Xu Q. [2 ]
Wang H. [1 ]
机构：
[1] Institute of Information Optics, Zhejiang Normal University
[2] Chengdu Fine Optical Engineering Research Center
来源：
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2011年 / 23卷 / 03期
关键词：
Coherent time; Interferometric imaging system; Rotating diffuser; Signal to noise ratio; Speckle noise;
D O I：
10.3788/HPLPB20112303.0702
中图分类号：
学科分类号：
摘要：
The theoretical model of signal-to-noise ratio(SNR) in the interferometric imaging system with rotating diffuser is proposed by means of statistical optics. According to the theoretical model, the relations between parameters of rotating diffuser, coherent time and SNR of the imaging system are analyzed numerically and demonstrated experimentally. It is shown that the rotating diffuser reduces coherent time, increases the number of unrelated speckle noises in gathering time, and thus reduces the speckle noise. An increasing in roughness or rotating frequency of diffuser or a decreasing in coherent length leads to a decreasing in coherent time. To obtain high SNR, the rotating diffuser should be well controlled so that the rotating period is approximately equal to the exposure time of CCD, and the coherent length of optical field is about 2~5 times as long as the optical path difference (OPD) between reference and test beams.
引用
收藏
页码：702 / 706
页数：4
相关论文
共 9 条
  • [1] Deck L L., Apparatus and method for reducing the effects of coherent artifact in an interferometer, (2003)
  • [2] Kuechel M., Apparatus and method for reducing the effects of coherent artifact in an interferometer, (2004)
  • [3] Xu J., Xu Q., Chai L., A new fringe-pattern preprocess method based on median spin filtering, High Power Laser and Particle Beams, 18, 1, pp. 69-72, (2006)
  • [4] Xu J., Xu Q., Deng Y., Et al., Application of ring source in interferometer, High Power Laser and Particle Beams, 20, 3, pp. 367-370, (2008)
  • [5] Liu Z., Gemma T., Rosen J., Et al., Improved illumination system for spatial coherence control, Appl Opt, 49, 16, pp. 12-16, (2010)
  • [6] Morris M.N., Naradikian M., Millerd J., Noise Reduction in dynamic interferometry measurements, Proc of SPIE, (2010)
  • [7] Goodman J.W., Speckle Phenomena in Optics: Theory and Application, pp. 141-186, (2006)
  • [8] Xu J., Information-theoretic analysis of phase-measurement interferometry, pp. 22-68, (2009)
  • [9] Xu J., Xu Q., Statistical analysis of SNR in interferometric imaging system, High Power Laser and Particle Beams, 22, 9, pp. 2071-2074, (2010)
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