Authors:
Ariel Schwarz
1
;
Nisan Ozana
2
;
Amir Semer
1
;
Ran Califa
3
;
Hadar Genish
3
and
Zeev Zalevsky
2
Affiliations:
1
Faculty of Engineering and the Nanotechnology Center, Bar Ilan University, Webb 1, Ramat Gan, Israel, Department of Electrical Engineering, Jerusalem College of Engineering, Schreiboim 26, Jerusalem and Israel
;
2
Faculty of Engineering and the Nanotechnology Center, Bar Ilan University, Webb 1, Ramat Gan and Israel
;
3
ContinUse Biometrics Ltd., HaBarzel 32b, Tel Aviv and Israel
Keyword(s):
Lasers, Speckle Interferometry, Scattering, Rough Surfaces, Fourier Optics and Signal Processing.
Related
Ontology
Subjects/Areas/Topics:
Biomedical Optics
;
Optics
;
Photonics, Optics and Laser Technology
Abstract:
In this paper, we describe a technique for elasticity and depth measurement via both secondary speckle and time multiplexing interference approach. Using external stimulation of elastic medium (in example: human tissue) by infra-sonic vibration, photons from different depths of the elastic medium were separated. In addition, this work uses a modulated laser that incorporates at the same scanning time, a speckle pattern tracking method for sensing surface tilting and interferometer method for sensing z-axis movements. In this paper, we present preliminary experiments showing the ability to separate data of light coming from different layers in the elastic medium.