US 4,740,047 A · Fiber for lateral beaming of laser beam

Abstract

A fiber for lateral beaming of a laser beam, wherein an affected portion in a cavity of an internal organ in a living body is irradiated by the laser beam in a through-endoscopic manner. The fiber for lateral beaming of the laser beam is constructed such that a transparent tubular member is coupled to the forward end portion of a fiber through two coating layers, and an anti-reflection coating layer is formed on a laser beam exiting surface of the transparent tubular member. Owing to the anti-reflection coating layer, this fiber for lateral beaming is free from the harmful leaking beam. Since the transparent tubular member is connected to the fiber through the two coating layes, the fiber can avoid being broken.

Claims6

Dependent claims

A fiber for lateral beaming of a laser beam, comprising:

a highly reflective surface, inclined at 35.degree. to 40.degree. to the center line of the fiber, formed at a distal end of the fiber;
and
a transparent first tubular member, one end of which is closed and the other end of which is coupled by means of a second tubular member to one end of the fiber having said inclined surface to form an air layer adjacent to said inclined surface;
wherein an anti-reflection coating layer is deposited on a laser beam exiting surface of said transparent first tubular member, and further wherein two coating layers exist between said fiber and said transparent first tubular member.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

06/841,422Filed 19 Mar 1986

Priority

JP 60-6126726 Mar 1985

Granted

26 Apr 1988

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

G02B 6/3624
Holders, macro size fixtures for mechanically holding or positioning fibres, e.g. on an optical bench: fibre head, e.g. fibre probe termination
A61B 1/00071
Constructional details of the endoscope body: insertion part of the endoscope body
A61B 1/0623
With illuminating arrangements: for off-axis illumination
A61B 1/07
With illuminating arrangements: using light-conductive means, e.g. optical fibres

Fiber for lateral beaming of laser beam

Life of this patent

Fiber for lateral beaming of laser beam

Life of this patent

Abstract

Claims6