Video moiré topography for in-vitro studies of the eardrumVideo moiré topography for in-vitro studies of the eardrum
Faculty of Sciences. Physics
Biophysics and Biomedical Physics
Bellingham :SPIE, 1998[*]1998
Optical and Imaging Techniques for Biomonitoring III Conference, Sept. 06-08, 1997, San Remo, Italy
University of Antwerp
An opto-electronic projection moire apparatus was developed for in-vitro studies of the eardrum. Moire topograms are generated by real-lime video image subtraction, yielding 25 new interferograms per second. By using different reference images, both shape and deformation fringes can be obtained, without manipulating the object or the setup. Calibration measurements show a measuring precision of 5 mu m. The setup is used to measure the shape and deformation of the eardrum. Parameters such as, for instance, the volume displacement of the pars flaccida, can be calculated from computer evaluations of the topograms.