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Speckle correlation technique to determine roughness in the dermatologic interval


Physics in Medicine and Biology 33(8): 913-922
Speckle correlation technique to determine roughness in the dermatologic interval
A non-invasive method is proposed to determine human skin roughness. The technique is based on measurement of the correlation between two field distributions scattered by a metallised triafol (cellulose acetate foil) replica of the epidermal area to be analysed. The two speckle patterns are produced from the same rough surface illuminated by two coherent plane waves (He-Ne laser) under two slightly different angles. The accuracy of the method is highlighted by measurements made on a set of standard samples with roughnesses previously determined by mechanical profilometry. Analysis of the results indicates a precision of around 10%, and an applicability within the interest range of very rough surfaces in excess of 4-5 microns.


Accession: 006459287

PMID: 3186788

DOI: 10.1088/0031-9155/33/8/002



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