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首页> 外文期刊>Optical engineering >Inspection of birefringent media by photoelasticity: from diffuse light polariscope to laser conoscopic technique
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Inspection of birefringent media by photoelasticity: from diffuse light polariscope to laser conoscopic technique

机译：通过光弹性检查双折射介质：从漫射偏振镜到激光锥镜技术

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摘要

A reliable and noninvasive measurement method for the inspection of naturally birefringent transparent media is presented in this paper. It allows us to achieve a spatially resolved analysis of the stress state of birefringent materials. The developed system is based on photoelasticity and exploits a controlled laser conoscopy technique and a scanning system to perform local measurements in the volume dimensions of the media, which can be displaced over a grid of points. The configuration of the proposed laser conoscopic system is presented, and a dedicated algorithm, designed to perform digital analysis of the fringe patterns, is also described. The design and the realization of the system are discussed, as well as the advantages of the proposed system over the classic diffuse light polariscope technique. The method has been experimentally validated through laboratory tests on birefringent samples with known induced stress. The system has demonstrated its sensitivity to stress and its capability to achieve a spatial resolution on the order of 0.1 mm to resolve stress gradients (uncertainty on the stress amplitude of ±0.1 MPa).
机译：本文提出了一种可靠的，无创的自然双折射透明介质检测方法。它使我们能够在空间上解析双折射材料的应力状态。所开发的系统基于光弹性，并利用受控的激光锥镜技术和扫描系统对介质的体积尺寸进行局部测量，该介质可以在多个点网格上移动。介绍了所提出的激光锥镜系统的配置，并描述了一种专用算法，该算法设计用于对条纹图案进行数字分析。讨论了系统的设计和实现，以及所提出的系统相对于经典漫射光偏振镜技术的优势。该方法已通过实验室测试对已知诱导应力的双折射样品进行了实验验证。该系统证明了其对应力的敏感性以及实现0.1 mm量级的空间分辨率以解决应力梯度的能力（应力幅值的不确定性为±0.1 MPa）。

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  • 来源
    《Optical engineering》 |2015年第8期|081210.1-081210.9|共9页
  • 作者

    Luigi Montalto; Nicola Paone; Daniele Rinaldi; Lorenzo Scalise;

  • 作者单位

    Università Politecnica delle Marche, Dipartimento di Ingegneria lndustriale e Scienze Matematiche, 12 Via Brecce Bianche, Ancona 60131, Italy,Università Politecnica delle Marche, Dipartimento di Scienze Ingegneria della Materia, dell'Ambiente ed Urbanistica, 12 Via Brecce Bianche, Ancona 60131, Italy;

    Università Politecnica delle Marche, Dipartimento di Ingegneria lndustriale e Scienze Matematiche, 12 Via Brecce Bianche, Ancona 60131, Italy;

    Università Politecnica delle Marche, Dipartimento di Scienze Ingegneria della Materia, dell'Ambiente ed Urbanistica, 12 Via Brecce Bianche, Ancona 60131, Italy,Istituto Nazionale di Fisica Nucleare-Sezione di Perugia, Via A. Pascoli, Perugia 06123, Italy;

    Università Politecnica delle Marche, Dipartimento di Ingegneria lndustriale e Scienze Matematiche, 12 Via Brecce Bianche, Ancona 60131, Italy;

  • 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

    photoelasticity; birefringent media; crystals; quality control; stress measurement; fringe processing;

    机译：光弹性双折射介质晶体质量控制;压力测量;条纹加工;

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