1 April 1997 Optoelectronic moiré projector for real-time shape and deformation studies of the tympanic membrane
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Abstract
Moiré topography is a valuable technique for studying the shape and deformation of delicate biological structures such as the tympanic membrane. A projection moiré method is described that can produce both shape and deformation fringes in real time, at a rate of 25 interferograms per second. The apparatus is based on electronic subtraction of the projected grating line image of the object and a reference grating line image stored in digital memory. The image field and fringe plane distance can be adjusted to the object dimensions. Using a fringe plane distance of 82 μm, a precision of 5 μm over a measuring depth of 0.4 mm is demonstrated by measurements on a spherical calibration object. The application to in vitro shape and deformation measurements of the gerbil tympanic membrane is demonstrated.
Joris J.J. Dirckx, Joris J.J. Dirckx, Willem F. Decraemer, Willem F. Decraemer, } "Optoelectronic moiré projector for real-time shape and deformation studies of the tympanic membrane," Journal of Biomedical Optics 2(2), (1 April 1997). https://doi.org/10.1117/12.268966 . Submission:
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