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, 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
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