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首页> 外文期刊>Optics and Lasers in Engineering >Surface roughness measurement by speckle contrast under the illumination of light with arbitrary spectral profile
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Surface roughness measurement by speckle contrast under the illumination of light with arbitrary spectral profile

机译：在任意光谱轮廓的光照射下，通过斑点对比度测量表面粗糙度

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摘要

Quantification of surface roughness greater than a micron is desirable for many industrial and biomedical applications. Polychromatic speckle contrast has been shown theoretically to be able to detect such roughness range using an appropriate light source with a Gaussian spectral shape. In this paper, we extend the theory to arbitrary spectral profile by formulating speckle contrast as a function of spectral profile, surface roughness, and the geometry of speckle formation. Under a far-field set-up, the formulation can be simplified and a calibration curve for contrast and roughness can be calculated. We demonstrated the technique using a blue diode laser with a set of 20 metal surface roughness standards in the range 1-73 μm, and found that the method worked well with both Gaussian and non-Gaussian surfaces.
机译：对于许多工业和生物医学应用而言，希望对大于一微米的表面粗糙度进行量化。理论上已经证明了多色斑点对比度可以使用具有高斯光谱形状的适当光源来检测这种粗糙度范围。在本文中，我们通过将斑点对比度表示为光谱轮廓，表面粗糙度和斑点形成的几何函数，将理论扩展到任意光谱轮廓。在远场设置下，可以简化配方，并可以计算出对比度和粗糙度的校准曲线。我们演示了使用具有20种金属表面粗糙度标准（范围为1-73μm）的蓝色二极管激光器的技术，并发现该方法在高斯表面和非高斯表面上均能很好地工作。

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  • 来源
    《Optics and Lasers in Engineering》 |2010年第8期|p.774-778|共5页
  • 作者

    Lioudmila Tchvialeva; Igor Markhvida; Haishan Zeng; David I. McLean; Harvey Lui; Tim K. Lee;

  • 作者单位

    Photomedicine Institute, Department of Dermatology and Skin Science, University of British Columbia and Vancouver Coastal Health Research Institute, Vancouver, Canada V5Z 4E8;

    Photomedicine Institute, Department of Dermatology and Skin Science, University of British Columbia and Vancouver Coastal Health Research Institute, Vancouver, Canada V5Z 4E8;

    Photomedicine Institute, Department of Dermatology and Skin Science, University of British Columbia and Vancouver Coastal Health Research Institute, Vancouver, Canada V5Z 4E8 Departments of Cancer Control Research and Cancer Imaging, BC Cancer Agency, Vancouver, Canada V5Z 1L3;

    Photomedicine Institute, Department of Dermatology and Skin Science, University of British Columbia and Vancouver Coastal Health Research Institute, Vancouver, Canada V5Z 4E8;

    Photomedicine Institute, Department of Dermatology and Skin Science, University of British Columbia and Vancouver Coastal Health Research Institute, Vancouver, Canada V5Z 4E8 Departments of Cancer Control Research and Cancer Imaging, BC Cancer Agency, Vancouver, Canada V5Z 1L3;

    Photomedicine Institute, Department of Dermatology and Skin Science, University of British Columbia and Vancouver Coastal Health Research Institute, Vancouver, Canada V5Z 4E8 Departments of Cancer Control Research and Cancer Imaging, BC Cancer Agency, Vancouver, Canada V5Z 1L3 School of Computing Science, Simon Fraser University, Burnaby, Canada V5A 1S6 BC Cancer Research Centre, Cancer Control Research Program, 675 West 10th Avenue, Vancouver, BC, Canada V5Z 1L3;

  • 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

    surface roughness; polychromatic speckle contrast; far-field; fraunhofer zone;

    机译：表面粗糙度;多色斑点对比远处的荒（田）野;弗劳恩霍夫地区;

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