PATENTSCOPE sera indisponible durant quelques heures pour des raisons de maintenance le lundi 03.02.2020 à 10:00 AM CET
Recherche dans les collections de brevets nationales et internationales
Une partie du contenu de cette demande n'est pas disponible pour le moment.
Si cette situation persiste, contactez-nous auObservations et contact
1. (WO1986003598) SYSTEME DE DECHARGE DE LUMIERE LASER ULTRAVIOLETTE PULSEE DE HAUTE ENERGIE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

WHAT IS CLATMED IS:

1. A system for the delivery of high energy pulsed laser light utilizing an optical waveguide, wherein said waveguide comprises an optical fiber having an energy-conducting core made of substantially pure synthetic silica.

2. The delivery system of claim 1 further including an energy coupler at one end of said fiber for enabling energy pulses to be coupled into said fiber while maintaining their energy level without damage to said fiber.

3. The delivery system of claim 1 further including a lens at one end of said fiber for concentrating the energy emerging from said end into a convergent beam.

4. The delivery system of claim 2 wherein said energy coupler comprises a surface' which is substantially free of scratches at said one end of said fiber, and a lens which focusses a laser beam to a focal point, said focussing lens being located at a distance from said one end of said fiber that is greater than the focal length of said focussing lens so that laser light impinging on said fiber appears to be emanating from a point source.

5. The delivery system of claim 4 wherein said one end of said fiber comprises a spherical lens.

6. The delivery system of claim 1 wherein said waveguide comprises a bundle of close-packed synthetic silica fibers to provide flexibility while enabling a relatively large cross-sectional beam to be delivered to a desired site.

7. The delivery system of claim 6 wherein said waveguide is housed in a jacket made from a material that is not degraded by ultraviolet light.

8. An angioplasty system for ablating obstructions in internal cavities and that provides a viewing -reference to assist in determining at least one of the relative location, shape and size of a viewed object, comprising:
a first fiber-optic waveguide having an objective lens at the distal end thereof, said lens having a predetermined numerical aperture defining a field of view;
a plurality of second fiber-optic waveguides made of substantially pure synthetic silica and
disposed around the periphery of said first waveguide, at least some of said second waveguides having- a numerical aperture such that light emerging from the distal ends of said second waveguides is spread over an area of illumination which is greater than said field of view;
at least one third fiber-optic waveguide disposed adjacent said second waveguides and producing a divergent beam of light from one end thereof which lies at least partially inside said field of view;
means for projecting visible light and pulsed laser energy into the other ends of said second waveguides;
means for projecting visible light having a discernible color into the other end of said third waveguide; and means for viewing an image conducted in said first waveguide.

9. The angioplasty system of claim 8 further including means for conducting a saline solution to the distal ends of said waveguides.

10. The delivery system of claim 2 wherein said energy coupler comprises a section of said fiber having a relatively large cross-sectional area at the end of said fiber and a tapered portion which reduces to a relatively small cross-sectional area to form a funnel-shaped input section.

11. The delivery system of claim 2 wherein said energy coupler comprises a cavity that is filled with a liquid medium and that has a window transparent to laser energy on one side thereof and is in communication with said one end of the fiber at the opposite side thereof.

12. The delivery system of claim 11 wherein said liquid medium is water.

13. The delivery system of claim 11 wherein said liquid medium is an oil having an index of refraction which is approximately the same as that of said optical fiber.

14. The delivery system of claim 3 wherein said lens is formed from the material of the fiber and integral therewith.

15. An angioplasty system, comprising:
a source of visible light;
a source of pulsed laser light energy;
means for combining visible light and laser light from said sources to propogate them along a common path;
a first fiber-optic waveguide made of
substantially pure synthetic silica which receives the visible light and laser light propogating along said path at one end thereof and conducts them to the distal end thereof;
a lens on said distal end of said first waveguide for producing a pattern of light in which a majority of the light energy is focussed upon a focal point and a relatively small. quantity of the light energy emitted from the distal end of said first waveguide is divergent;
a second fiber-optic waveguide disposed alongside said first waveguide for receiving and conducting the image of an area illuminated by visible light emerging from said first waveguide; and
means for viewing an image conducted by said second waveguide.

16. The angioplasty system of claim 15 wherein said source of laser light energy is an Excimer laser, and further including an energy coupler at said one end of said first waveguide for coupling laser pulses having a predetermined energy level into said first waveguide without damage thereto.