The use of interference modulated laser beam in the study of the form of vocal folds

J. Keprt; L. Bartoněk

doi:10.1117/12.639041

6 December 2006 The use of interference modulated laser beam in the study of the form of vocal folds

J. Keprt, L. Bartoněk

Proceedings Volume 5945, 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 59451F (2006) https://doi.org/10.1117/12.639041
Event: 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2005, Nitra, Slovakia

Abstract

Two optical measuring methods were used to describe the form of a plaster model of a human vocal folds. The method of the classical shadow moire topography with illumination of a specimen by incoherent parallel beam of light trough a linear grating and the method of an interference modulated laser beam using for illumination of the specimen and a reference plane screen located in front of the specimen (object). The two pictures registered by CCD camera and a computer PC are subtracted and the absolute value of their difference gives the moire interferograms with good contrast. Using by computer realized FFT and the space filtration of Fourier spectrum we get a position of a contour line system defining the form of the studied object.

Citation Download Citation

J. Keprt and L. Bartoněk "The use of interference modulated laser beam in the study of the form of vocal folds", Proc. SPIE 5945, 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 59451F (6 December 2006); https://doi.org/10.1117/12.639041

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