Fiber optic laser conducting and diffusion device

• US 5,530,780 A
• Filed: 06/07/1995
• Issued: 06/25/1996
• Est. Priority Date: 12/20/1993
• Status: Expired due to Fees

• Current Assignee: Moritex Corporation (Cognex Corporation), Hamamatsu Photonics KK, Wyeth KK (Pfizer Inc.)
• Original Assignee: Moritex Corporation (Cognex Corporation), Hamamatsu Photonics KK, Lederle (Japan), Ltd.
• Inventors: Ohsawa, Masami
• Primary Examiner(s): NGO, HUNG NHAT
• Application Number:
  US08/473,931
• Time in Patent Office: 384 Days
• Field of Search: 606/7, 606/8, 606/14, 606/15, 606/16, 606/18, 385/31, 385/33, 385/34, 385/35, 385/79, 385/139, 385/901
• US Class Current: 385/31
• CPC Class Codes: A61B 18/24 with a catheter A61B18/26, A61B18/28 take precedence
• CPC Class Codes: A61B 2018/2261 with scattering, diffusion or dispersion of light
• CPC Class Codes: A61N 5/0601 Apparatus for use inside the body
• CPC Class Codes: G02B 6/241 Light guide terminations
• CPC Class Codes: G02B 6/3624 Fibre head, e.g. fibre probe termination optical details of light guide terminations G02B6/241; reshaping of light guides G02B6/2552; optical details of coupling light into or out of fibre end G02B6/262
• CPC Class Codes: Y10S 385/901 Illuminating or display apparatus

Abstract

A polyolefin resin light diffusion tip is attached to an optical fiber end for conducting a pulse laser beam.

Claims

1. A fiber optic laser conducting and diffusion device for a photodynamic therapy characterized in that a polyolefin resin light diffusion tip is attached to an optical fiber end to irradiate a pulse laser beam conducted in the optical fiber against an object, and wherein a light reflecting mirror is provided in a hollow portion of the polyolefin resin light diffusion tip.

2. A fiber optic laser conducting and diffusion device for a photodynamic therapy according to claim 1, wherein the polyolefin resin light diffusion tip is a polyethylene resin light diffusion tip.

3. A fiber optic laser conducting and diffusion device for a photodynamic therapy characterized in that a polyolefin resin light diffusion tip is attached to an optical fiber end to irradiate a pulse laser beam conducted in the optical fiber against an object, and wherein a light reflecting mirror is provided in a hollow portion of the polyolefin resin light diffusion tip.

4. A fiber optic laser conducting and diffusion device for a photodynamic therapy according to claim 3, wherein the polyolefin resin light diffusion tip is a polyethylene resin light diffusion tip.

5. A fiber optic laser conducting and diffusion device for use attached to an end of an optical fiber for performing photodynamic therapy, said fiber optic laser conducting and diffusion device comprising:

a light diffusion tip for diffusing light from the optical fiber irradiated toward an object; and

wherein said light diffusion tip is formed of polyolefin resin having generated molecular spherulites.

6. A fiber optic laser conducting and diffusion device according to claim 5, wherein

said light diffusion tip has a hollow portion formed therein;

and

a light reflecting mirror is provided in said hollow portion of said light diffusion tip.

7. A fiber optic laser conducting and diffusion device according to claim 5, wherein

said light diffusion tip has an inner surface;

and

light reflecting and diffusion incisions are formed in said inner surface of said light diffusion tip.

8. A fiber optic laser conducting and diffusion device according to claim 5, wherein

said light diffusion tip has a hollow portion formed therein;

a core portion of the end of the optical fiber projects into said hollow portion and is exposed to an inner surface of said light diffusion tip; and

an outer surface of said core portion projecting into said hollow portion is roughened.

9. A fiber optic laser conducting and diffusion device according to claim 8, wherein

said polyolefin resin of which said light diffusion tip is formed comprises polyethylene resin.

10. A fiber optic laser conducting and diffusion device according to claim 5, wherein

said polyolefin resin of which said light diffusion tip is formed comprises polyethylene resin.