Law of Background Fringes in Video of Scanning CCD Induced by Repetitive Pulse Lasers

ZHANG Zhen; ZHOU Meng-lian; CAI Yue; ZHANG Jian-min; WEI Cheng-hua

doi:10.3788/OPE.20132107.1676

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Law of Background Fringes in Video of Scanning CCD Induced by Repetitive Pulse Lasers

更新时间：2020-08-12

- Law of Background Fringes in Video of Scanning CCD Induced by Repetitive Pulse Lasers
- Optics and Precision Engineering Vol. 21, Issue 7, Pages: 1676-1682(2013)
- 作者机构：
  
  西北核技术研究所激光与物质相互作用国家重点实验室,陕西西安,710024
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20132107.1676
  CLC： TN249;TN386.5
- Received：21 January 2013，
  
  Revised：18 March 2013，
  
  Published Online：15 July 2013，
  
  Published：15 July 2013
- 稿件说明：
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张震周孟莲蔡跃张检民韦成华. 重复脉冲激光造成扫描型CCD背景条纹的规律[J]. 光学精密工程, 2013,21(7): 1676-1682

. Law of Background Fringes in Video of Scanning CCD Induced by Repetitive Pulse Lasers[J]. Editorial Office of Optics and Precision Engineering, 2013,21(7): 1676-1682
张震周孟莲蔡跃张检民韦成华. 重复脉冲激光造成扫描型CCD背景条纹的规律[J]. 光学精密工程, 2013,21(7): 1676-1682 DOI： 10.3788/OPE.20132107.1676.

. Law of Background Fringes in Video of Scanning CCD Induced by Repetitive Pulse Lasers[J]. Editorial Office of Optics and Precision Engineering, 2013,21(7): 1676-1682 DOI： 10.3788/OPE.20132107.1676.

摘要

为了描述重复脉冲激光使扫描型CCD输出视频产生背景条纹的规律，基于这种背景条纹现象的产生机理对理想矩形脉冲激光产生的条纹建立了数学描述模型。通过该模型，可根据相机的时间延迟积分级数、单级积分时间和激光脉冲的脉宽、脉冲重复周期等参量之间的关系来判断背景条纹能否出现并计算背景条纹的尺寸参量，计算精确度为1 pixel。利用重复皮秒脉冲激光和日光灯分别辐照扫描型CCD进行了实验，验证了上述模型计算结果的正确性。在该模型的基础上，结合背景光强与脉冲散射光强的关系，给出了条纹可见度的表达式，并通过实验验证了该表达式所反映出的条纹可见度随着相关参量变化的规律。

Abstract

In order to obtain the generating law of background fringes in the video of a scanning CCD camera induced by repetitive pulse lasers

a mathematic model describing fringes induced by repetitive square pulse lasers is established. In this model

the relation of camera parameters including stage number of time delay integrations

integration time of one stage as well as laser pulse width and laser repetitive period can be used to estimate whether the fringes appear or not and to calculate what is the dimensions of fringes

in which the precision of calculation is 1 pixel. An experiment is performed by using repetitive picosecond pulse lasers and a fluorescent lamp to irradiate the scanning CCD camera respectively

and the results validate the correction of estimation and calculation based on the model. Finally

combing the intensity relation of background light and scattered laser with the model

the visibility expression of fringes is given

which is also validated in the experiment.

关键词

Keywords

references

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