کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
745620 1461744 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface roughness measurement by speckle contrast under the illumination of light with arbitrary spectral profile
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Surface roughness measurement by speckle contrast under the illumination of light with arbitrary spectral profile
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 48, Issues 7–8, July–August 2010, Pages 774–778
نویسندگان
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