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Proceedings Paper

Contact fiber optic sensor for endoscopic laser-induced fluorescence analysis
Author(s): Nikolay A. Denisov; Sergiy M. Dets; Igor Kravchenko
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Paper Abstract

During the clinical endoscopic LIF-diagnostics of human digestion organs is needed to register fluorescence spectra in situ. Taking into account intensive bloodstream and therefore strong hemoglobin absorption of laser light the registered fluorescence signal is strongly dependent on distal probe geometry. The contact optics sensor is specially designed to enhance acquisition of auto- and exogenous fluorescence spectra from tissues. The fiber optics sensor consists of cylindrical sapphire or silica body with flat proximal and spherical distal end and tapered tip. The latter one has been made of optical material. This tip has been arranged abutting against the proximal end of the cylindrical body. Such sensor design offers to collect autofluorescent light in wide angle region effectively. Moreover that offers to use sensor simultaneously as an efficient both laser radiation collector and fiber coupler to transport exciting light at the testing site and backward. The produced distal probe has been used through the biopsy channel to endoscope. Original beam splitter throws 80% of fluorescent signal toward detector and simultaneously transmits up to 85% of He-Cd laser radiation to the tissue.

Paper Details

Date Published: 7 May 1997
PDF: 8 pages
Proc. SPIE 2980, Advances in Fluorescence Sensing Technology III, (7 May 1997); doi: 10.1117/12.273556
Show Author Affiliations
Nikolay A. Denisov, National Technical Univ. of Ukraine (Ukraine)
Sergiy M. Dets, National Technical Univ. of Ukraine (Ukraine)
Igor Kravchenko, National Technical Univ. of Ukraine (Ukraine)

Published in SPIE Proceedings Vol. 2980:
Advances in Fluorescence Sensing Technology III
Richard B. Thompson, Editor(s)

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