Abstract: A fiber, especially an optical fiber, comprising a lightguide, provided with a protective coating comprising at least one layer of a crosslinked epoxidized-polydiene oligomer, as well as to a process for manufacturing such a fiber. The protective coating may include an intermediate layer of a crosslinked material that adheres to the fiber less strongly than the crosslinked epoxidized-polydiene oligomer.
Type:
Grant
Filed:
June 11, 1999
Date of Patent:
September 18, 2001
Assignee:
Fort Fibres Optiques Recherche et Technologie
Abstract: The color video-endoscope (100) comprises in particular:a single light source (10);a bundle of optical fibers (40) for transmitting the light to a field of observation;a periodic filtering device (50) including three filters (53, 54, 55) illuminating the field of observation with three respective primary colors (R, G, B), and a fourth filter zone (56) which is transparent and through which the light also passes;a photosensitive sensor (60) for picking up an image of objects situated in the field of observation;an analog-to-digital converter (91) for digitizing the periodic information from the sensor (60) representative of color images (RGB) and of a black-and-white image (B/W), with the digital information being stored in four respective memories (81 to 84); anda color toning device (85a, 85b) selectively combining the black-and-white image information (B/W) with the color information for the purpose of reconstituting a color image of very good quality.
Type:
Grant
Filed:
August 13, 1992
Date of Patent:
January 11, 1994
Assignee:
Fort Fibres Optiques Recherche et Technologie
Abstract: A rigid video-endoscope having an optical system which provide a rotatable image of an object to be observed is shown and described. The optical system is inside a rigid tube. A camera who's axis is in alignment with the optical axis of the optical system picks up the image provided by the optical system. A bundle of optical fibers passing along the tube is connected to a light source for illumination of the object to be observed. Rotation of the image provided by the optical system which adjusts the orientation of the image relative to an observer. The rotating device is disposed inside a handle of the video-endoscope together with the camera and disposed between the camera and the optical system.
Type:
Grant
Filed:
December 12, 1989
Date of Patent:
April 9, 1991
Assignee:
Fibres Optiques Recherche et Technologie
Abstract: A quick connector for optical fibers of the type comprising a first and second tubular bodies through which passes an optical fiber, which are aligned axially and joined together by means of a nut which partially envelops the second body and is screwed about the first body. The connector further comprises means for fixing and centering the fiber by clamping, this means being formed more particularly by a rigid sleeve and a deformable sleeve intended to be fitted on the optical fiber and to be housed end to end inside said second body.Furthermore, the connector cooperates with a tool intended to carry out the circular cutting or cleavage of the proximal end of the optical fiber.
Type:
Grant
Filed:
March 18, 1986
Date of Patent:
November 22, 1988
Assignee:
Fort, Fibres Optiques Recherche et Technologie