Skin characteristics by laser generated surface waves

Zhihong Huang, Adèle L'Etang

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Citations (Scopus)


    This paper discusses a study into the suitability of using laser generated surface acoustic waves for the characterisation of skin properties without causing any damage to the skin thermally or by mechanical disruption. Using commercial Finite Element Code ANSYS, the effects of laser wavelength, laser beam radius and laser rise time on generation of laser generated ultrasonic waves in a 3-layered elastic isotropic model of human skin were studied. The FE model is an example of a sequential coupled field analysis where the thermal and mechanical analyses are treated separately. The heating of the skin model due to the short laser pulse is simulated by a dynamic thermal analysis with the laser pulse modeled as volumetric heat generation and the results from this analysis subsequently applied as a load in the mechanical analysis where the out-of-plane displacement histories are analyzed. The technique described in this paper also involves measuring the propagation velocity of SAWs, which are directly related to the material properties, and thickness of layers, this is done over a wide frequency range in order to obtain maximum information regarding the material under test.
    Original languageEnglish
    Title of host publicationEngineering in Medicine and Biology Society, 2009. EMBC 2009. Annual International Conference of the IEEE
    PublisherIEEE Computer Society
    Number of pages4
    ISBN (Print)9781424432967
    Publication statusPublished - 2009
    Event 31st Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Minneapolis, United States
    Duration: 2 Sept 20096 Sept 2009


    Conference 31st Annual International Conference of the IEEE Engineering in Medicine and Biology Society
    Abbreviated titleEMBC 2009
    Country/TerritoryUnited States
    Internet address


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