Surface roughness measurement methods and apparatus

Details Surface roughness measurement methods and apparatus Surface roughness measurement methods and apparatus

A - Human Necessities

61

B

A61B 5/107 (2006.01) G01B 11/30 (2006.01) G01J 9/00 (2006.01) G01J 9/02 (2006.01)

Patent

CA 2594010

Surface roughness measurements are made by illuminating a surface with coherent light to generate a speckle pattern and studying characteristics of the speckle pattern. The disclosed techniques may be applied to measuring the surface roughness of skin or other biological surfaces. Skin roughness information may be used in the diagnosis of conditions such as malignant melanoma. Methods and apparatus for measuring the coherence length of optical sources involve extracting information about speckle patterns resulting when light from the optical sources interacts with a surface having a known roughness.

Des mesures de la rugosité d'une surface sont effectuées par éclairage d'une surface au moyen d'une lumière cohérente afin de générer un motif de granularité et d'étudier les caractéristiques de ce motif. Les techniques de cette invention peuvent être appliquées pour mesurer la rugosité de la surface de la peau ou d'autres surfaces biologiques. L'information sur la rugosité de la peau peut être utilisé dans le diagnostic de pathologies, notamment le mélanome malin. Des procédés et un appareil de mesure de la longueur de cohérence de sources optiques impliquent l'extraction d'informations concernant les motifs de granularité obtenus lorsque la lumière en provenance des sources optiques interagit avec une surface à rugosité connue.

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