Title
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Indentation measurements on the eardrum with automated projection moiré profilometry
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Author
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Abstract
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Computer modeling of middle ear mechanics is an important tool to investigate its complex behavior, but correct mechanical and elastic parameters are needed to obtain realistic simulations. A possible way to determine eardrum elasticity in situ is the use of point indentation measurements. The eardrum is, however, a small fragile membrane, so a non-contacting high-resolution technique is needed to measure the shape change caused by point indentation. We have developed a projection moiré interferometer combined with an indentation actuator and a high-resolution force sensor. The apparatus applies deformations up to 1 mm with a resolution of , while the indentation force is measured with a resolution better than 1 mN. The moiré setup delivers height data on 512×512 points through phase-shifting, with a height resolution of . Shape recordings are made on a rabbit eardrum at different indentation distances, and indentation force is recorded simultaneously. |
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Language
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English
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Source (journal)
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Optics and lasers in engineering. - Barking
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Publication
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Barking
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2009
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ISSN
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0143-8166
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DOI
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10.1016/J.OPTLASENG.2008.01.002
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Volume/pages
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47
:3/4
(2009)
, p. 301-309
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ISI
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000264096500004
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Full text (Publisher's DOI)
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