Focal, Inc.

Michael G Dumont

Farhad Khosravi

David A Melanson

Stephen Jack Herman

Laurence A Roth

Patrick K Campbell

Dean M Pichon

J Jeffrey Kablik

John C Spiridigliozzi

A device for testing the light power output of an optical system comprises a thermochromic element, a body element optionally providing collimation or other means of reproducible positioning, and optionally filters and attenuation. A preferred device fits onto the end of an optical power delivery system, and the thermochromic element changes color if the system output is above a defined threshold. An alternative device provides a flat target with a The device may be adapted to be sterilizable, and may be disposable. Optional means for ensuring that the light delivery system is operational during the measurement are provided.

Light source power tester

An optical fiber device includes a polymeric optical fiber having a proximal end for coupling to a source of light, and a diffusing region. The polymeric optical fiber includes a core and a cladding around the core. The diffusing region includes a length of the polymeric optical fiber in which the cladding is partially removed to expose the core and in which the exposed core and the remaining cladding have a roughened surface for outwardly diffusing light carried through the polymeric optical fiber. The diffusing region is preferably formed by abrasion, for example by directing a particle jet at the optical fiber while rotating and translating the optical fiber with respect to the particle jet. The particle jet may include microscopic glass beads which roughen the optical fiber core. The density of scattering sites may be varied along the length of the diffusing region to produce a desired light output pattern. The optical fiber device is useful in medical applications, including as a component of catheter or endoscopic systems.

Optical fiber diffuser and method of making

Devices for providing polymeric layers on the interior surface of body lumens and spaces are disclosed. The devices can include proximal and distal occlusion elements to define the treatment space and an optical emitter to provide light for a photopolymerization procedure. The devices may include a molding member for providing a thick polymeric gel. Alternatively, devices without a molding member may be used to carry out an interfacial polymerization procedure.

Devices and methods for application of intraluminal photopolymerized gels

Methods for application of intraluminal photopolymerized gels

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Hampton, NH, United States of America

Michael G Dumont