Evaluation of surface acoustic waves on the human skin using quasi-time-averaged digital Fresnel holograms
| Autor: | François Gautier, Vincent Isnard, Mayssa Karray, Mathieu Leclercq, Pascal Picart |
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| Rok vydání: | 2013 |
| Předmět: |
Holography
Phase (waves) law.invention Optics law Elastic Modulus Skin Physiological Phenomena Humans Electrical and Electronic Engineering Engineering (miscellaneous) Skin Physics business.industry Signal Processing Computer-Assisted Acoustic wave Holographic interferometry Atomic and Molecular Physics and Optics Vibration Refractometry Sound Surface wave Elasticity Imaging Techniques Speckle imaging business Digital holography |
| Zdroj: | Applied optics. 52(1) |
| ISSN: | 1539-4522 |
| Popis: | This paper proposes a first attempt to visualize and analyze the vibrations induced by a bone-conduction device and propagating at the surface of the skin of a human face. The method is based on a new approach in a so-called quasi-time-averaging regime, resulting in the retrieval of the vibration amplitude and phase from a sequence of digital Fresnel holograms recorded with a high image rate. The design of the algorithm depends on the ratio between the exposure time and the vibration period. The results show the propagation of vibrations at the skin surface, and quantitative analysis is achieved by the proposed approach. |
| Databáze: | OpenAIRE |
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