EurekaMag.com logo
+ Translate

Speckle correlation technique to determine roughness in the dermatologic interval


, : Speckle correlation technique to determine roughness in the dermatologic interval. Physics in Medicine and Biology 33(8): 913-922

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.

(PDF same-day service: $19.90)

Accession: 006459287

PMID: 3186788

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

Submit PDF Full Text: Here


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Related references

Léger, D.; Mathieu, E.; Perrin, J.C., 1975: Optical surface roughness determination using speckle correlation technique. Two speckle patterns produced from the same rough surface by two different illuminations are correlated. The correlation depends on the surface roughness. The two illuminations were obtained here by varying the angle of incidence of a coherent pla...

Sadeh, D.; Shannon, D.C.; Abboud, S.; Akselrod, S.; Cohen, R.J.; Cohen, R.J., 1987: A new technique to determine the correlation between the QT interval and heart-rate for control and SIDS babies. The ability of the autonomic nervous system to alter the QT interval in response to heart rate changes is essential to cardiovascular control. An accurate way to determine the relation between QT intervals and their corresponding RR intervals is d...

Tay, C.J.; Toh, S.L.; Shang, H.M.; Zhang, J., 1995: Whole-field determination of surface roughness by speckle correlation. A whole-field method of double-exposure speckle photography is employed to determine metal surface roughness by correlation between two speckle patterns. A movable rectangular aperture that is mounted before an image lens is shifted between the ex...

Winkler, M.M.; Moore, B.K., 1994: Correlation of bond strength with surface roughness using a new roughness measurement technique. The correlation between shear bond strength and surface roughness was investigated using new surface measurement methods. Bonding agents and associated resin composites were applied to set amalgam after mechanically roughening its surface. Surface...

Salazar, Félix.; Barrientos, A., 2014: Surface roughness measurement on a wing aircraft by speckle correlation. The study of the damage of aeronautical materials is important because it may change the microscopic surface structure profiles. The modification of geometrical surface properties can cause small instabilities and then a displacement of the bounda...

Lehmann, P., 2008: Surface-roughness measurement based on the intensity correlation function of scattered light under speckle-pattern illumination. The statistical properties of speckle patterns generated from a rough surface under a fully developed static speckle-pattern illumination are examined. The roughness dependence of the intensity autocorrelation function is studied and utilized to c...

Cheng, C.; Liu, C.; Zhang, N.; Jia, T.; Li, R.; Xu, Z., 2002: Absolute measurement of roughness and lateral-correlation length of random surfaces by use of the simplified model of image-speckle contrast. We present a method of image-speckle contrast for the nonprecalibration measurement of the root-mean-square roughness and the lateral-correlation length of random surfaces with Gaussian correlation. We use the simplified model of the speckle field...

Yura, H.T.; Hanson, S.G., 2003: Comment: absolute measurement of roughness and lateral-correlation length of random surfaces by use of the simplified model of image-speckle contrast. This comment demonstrates several errors in the derivation of speckle contrast and corresponding measurements reported by Cheng et at. (Appl. Opt. 41, 4148 (2002)] for a 4f optical system. In particular, the theoretical derivation is wrong: It is...

Vanneuville, G.; Kyndt, T.; Massaux, M.; Harmand, Y.; Poumarat, G.; Garcier, J.M.; Guillot, M.; Filaire, M., 1995: Preliminary study of the human lumbar spine using speckle technique. Limits of compression, shear and torsion. Speckle photography--electronic speckle pattern interferometry. Optical techniques using single wavelength lasers allow precise study of the superficial displacements of deeper anatomical structures through direct mechanical pull. Two techniques have been used in this study: 1. Double exposure speckle photogra...

Svanbro, A., 2004: In-plane dynamic speckle interferometry: comparison between a combined speckle interferometry/speckle correlation and an update of the reference image. A common problem during study of, for instance, tensile tests with interferometers is that the sample moves too much so that the speckles decorrelate and no phase information is obtained. Two ways to overcome this problem are compared: a combinati...