Abstract: A dome-shaped chemical sensing probe comprises an optical fiber or may be mounted on an optical fiber. The probe has a chemically sensitive measuring material which exhibits a change in volume and/or a change in refractive index in the presence of a given chemical. The change in volume and/or refractive index gives a change in an optical path length through the probe which can be measured interferometrically.
Type:
Application
Filed:
March 14, 2006
Publication date:
October 12, 2006
Applicant:
OptoMed AS
Inventors:
Dag Hjelme, Arne Berg, Reinold Ellingsen, Berit Falch, Astrid Bjorkoy, Dan Ostling
Abstract: An apparatus for controlling the temperature of a part of a human or animal body 2 during a cryosurgical procedure is disclosed. The apparatus comprises a radiative energy transmitter 26 for radiating energy to a zone of the body 2 to be protected from excessive cooling. There is also provided a means 12 for controlling the energy radiated by said radiative energy transmitter 26. Preferably the radiative energy transmitter comprises an infra-red laser diode coupled to a diffuser 34 by an optical fibre 40.
Type:
Grant
Filed:
May 16, 2002
Date of Patent:
July 25, 2006
Assignee:
OptoMed. AS
Inventors:
Lars Othar Svaasand, Reinold Ellingsen, Hans Christian Boldstad, Dag Roar Hjelme
Abstract: The invention relates to an insertion probe for sensing distributed temperature comprising a tube containing at least one optical fiber being inscribed with at least one Bragg grating, the tube being sealed at its distal end. The probe is characterized in that it consists of materials having low magnetic susceptibility. The invention also relates to the use of such a probe in cryosurgery to allow the use of magnetic resonance imaging.
Abstract: A body compatible fiber optic sensor probe for invasive medical use is provided. The probe includes at least one sensing location at which the fiber is configured to provide at least one detectable changeable optical property responsive to strain within the fiber, and at least one sensing element which undergoes a volumetric change in response to an in body parameter to be sensed. The sensing element is coupled to the fiber in such a way that the volumetric change induces strain within the fiber so as to vary the detectable optical property or properties.
Type:
Grant
Filed:
September 7, 2001
Date of Patent:
February 21, 2006
Assignee:
OptoMed. AS
Inventors:
Erlend Ronnekleiv, Arne Berg, Jon Thomas Kringlebotn, Reinold Ellingsen, Dag Roar Hjeime
Abstract: A chemical sensing probe comprises an optical fiber or may be mounted on an optical fiber. The probe has a chemically sensitive measuring material which exhibits a change in volume and/or a change in refractive index in the presence of a given chemical. The change in volume and/or refractive index gives a change in an optical path length through the probe which can be measured interferometrically.
Type:
Application
Filed:
October 18, 2002
Publication date:
June 19, 2003
Applicant:
OptoMed. AS
Inventors:
Dag R. Hjelme, Arne Berg, Reinold Ellingsen, Berit Falch, Astrid Bjorkoy, Dan Ostling