Abstract: The invention relates to a method for the fabric using an acquisition system that includes at acquisition of in-vivo fluorescence imaging from a least one optical fibre exciting the fabric by scanning light beam. According to the invention, the system is used to detect fluorescence signals emitted by the Methylene Blue present in the fabric.

Abstract: An equipment includes an excitation source (1), elements for injecting (2) an excitation signal produced by the source in an ordered bundle (3) of flexible optical fibers, elements for analyzing (21, 22) an emitted autofluorescence signal. The equipment also includes at the output of the optical fiber bundle (3) an optical head (4) designed to be placed in contact with the biological tissue (6), the optical head being equipped with optical elements adapted to cause the excitation signal output from the bundle (3) to converge into a subsurface analyzing zone (5), the same optical fiber(s) used for excitation of the bundle (3) being used for detecting the signal emitted by the subsurface analyzing zone, elements (D) placed upstream of the injection elements (2) being further provided to separate the wavelength of the excitation signal and the wavelength of the autofluorescence signal.

Abstract: An optical head for equipping the distal end of a flexible optical fiber bundle, designed to be urged into contact with an analyzing surface and including optical elements for focusing an excitation signal into a so-called excitation focal point located at a specific depth beneath the analyzing surface and for sampling a signal backscattered by the excitation focal point which is carried back by the fiber bundle. The head includes an optics-holder tube wherein are inserted on one side the distal end portion of the fiber bundle and on the other optical elements, the latter including a plate placed in contact with the end of the fiber bundle whereof the index is close to that of the fiber core and a focusing optical block, an output window being further provided adapted to provide index adaptation so as to eliminate parasitic reflection occurring on the analyzing surface.

Abstract: An optical head for equipping the distal end of a flexible optical fiber bundle, designed to be urged into contact with an analyzing surface and including optical elements for focusing an excitation signal into a so-called excitation focal point located at a specific depth beneath the analyzing surface and for sampling a signal backscattered by the excitation focal point which is carried back by the fiber bundle. The head includes an optics-holder tube wherein are inserted on one side the distal end portion of the fiber bundle and on the other optical elements, the latter including a plate placed in contact with the end of the fiber bundle whereof the index is close to that of the fiber core and a focusing optical block, an output window being further provided adapted to provide index adaptation so as to eliminate parasitic reflection occurring on the analyzing surface.

Abstract: The invention concerns an equipment comprising an excitation source (1), means for injecting (2) an excitation signal produced by said source in an ordered bundle (3) of flexible optical fibers, means for analyzing (21, 22) an emitted autofluorescence signal. The invention is characterized in that it comprises in output of the optical fiber bundle (3) an optical head (4) designed to be placed in contact with the biological tissue (6), said optical head being equipped with optical means adapted to cause the excitation signal output from said bundle (3) to converge into a subsurface analyzing zone (5), the same optical fiber(s) used for excitation of said bundle (3) being used for detecting the signal emitted by said subsurface analyzing zone, means (D) placed upstream of the injection means (2) being further provided to separate the wavelength of the excitation signal and the wavelength of the autofluorescence signal.