JPS6398507U

JPS6398507U -

Info

Publication number: JPS6398507U
Application number: JP1986194268U
Authority: JP
Priority date: 1986-12-17
Filing date: 1986-12-17
Publication date: 1988-06-25

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す全体の構成
図、第２図は第１図―線に沿つた拡大断面図
、第３図は光フアイバーの折れ曲りに伴なう光量
変化の特性グラフ、第４図イ〜ニは往復二本の光
フアイバー型式の場合の光反射手段を示す概略側
面図、第５図、第６図は第４図イ〜ニの場合の拡
大断面図である。（符号の説明）、１……パワー伝送用レーザー
フアイバー、４……折れ曲り度検出用光フアイバ
ー、３……レーザーハンドピース、６Ａ……発光
ダイオード（発光源）、６Ｂ……フオトデイテク
タ（受光器）、９……制御装置。 Fig. 1 is an overall configuration diagram showing an embodiment of this invention, Fig. 2 is an enlarged sectional view along the line of Fig. 1, and Fig. 3 is the characteristic of light intensity change due to bending of the optical fiber. Graphs, Figures 4A to 4D are schematic side views showing the light reflecting means in the case of two reciprocating optical fibers, and Figures 5 and 6 are enlarged sectional views in the case of Figures 4A to D. . (Explanation of symbols), 1... Laser fiber for power transmission, 4... Optical fiber for detecting bending degree, 3... Laser handpiece, 6A... Light emitting diode (light emitting source), 6B... Photo detector (light receiver) ), 9...control device.

Claims

[Claims for Utility Model Registration] (1) An optical fiber for detecting the degree of bending is arranged along the side surface of a laser fiber for power transmission, and a constant distance from the end face of the optical fiber for detecting the degree of bending is provided. a light emitting source that allows a certain amount of light to enter;
A light receiver is provided to receive the light transmitted through the optical fiber, and a change in the amount of light received by the light receiver due to a change in the degree of bending of the laser fiber and the optical fiber is detected, and the amount of light received is set. A device for preventing breakage of a laser fiber, characterized in that it is equipped with a control device that automatically stops oscillation of a laser oscillator when the value falls below a certain value. (2) The optical fiber for detecting the degree of bending is composed of a single fiber, and the light incident from one end face of this single optical fiber is reflected by a reflecting means formed on the other end face of the fiber. The laser fiber breakage prevention device according to claim 1, which is configured to detect changes in the amount of reflected light by reflecting the light through the optical fiber to the incident end surface. (3) The optical fiber for detecting the degree of bending is composed of two reciprocating fibers, an incident fiber and a reflective fiber, and the light source and receiver are arranged together at one end of the optical fiber. A laser fiber breakage prevention device according to claim 1 of the registered utility model. (4) The laser fiber breakage prevention device according to claim 1, wherein the power transmission laser fiber and the bending degree detection optical fiber are inserted into a common protective tube. (5) The laser fiber breakage prevention device according to any one of claims 1 to 4, wherein the optical fiber for detecting the degree of bending is a plastic fiber. (6) Preventing the laser fiber from breaking according to any one of claims 1 to 5, wherein the optical fiber for detecting the degree of bending is surrounded by a covering material having good absorption against laser light, such as black. Device.