JPS61245119A - Connection sleeve for connecting laser beam into optical waveguide - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention is a coupling sleeve for coupling a laser beam into an optical waveguide, the waveguide being connected to a capillary tube embedded in the coupling sleeve. Relating to a type of thing that is fixed with adhesive.

BACKGROUND OF THE INVENTION The advantage of using a high-intensity Rade beam in optical equipment is that the light output is easily controlled and delivered to the optical equipment without significant Rade losses. For this purpose, it is known to use optical waveguides (also referred to as light guides) made of thin glass fibers or similar materials. It is particularly advantageous to use so-called graded index fibers or stepped fibers with a core diameter of 50 WLμ to 111I. Plug-in parts for releasable plug-in connections of optical waveguides are also known. Such a plug connection is known, for example, from German Patent Application No. 33 10 973 AI. Furthermore, guide connectors for medical radar equipment are known which are arranged in front of an optical connector for an impinging laser beam. Such a light guide connection is described, for example, in German Utility Model Registration No. 8416748. However, this known example results in high connection losses. Furthermore, if the optical connection is misadjusted, the light guide or its jacket can be damaged by the Rede radiation.

OBJECTS OF THE INVENTION The object of the invention is to provide a guide structure which guarantees a high transmission rate at the connection of the Lede beam, that is to say with low connection losses and which also prevents damage to the light guide fiber and the fiber jacket. Furthermore, the connection between the fiber and the wire must be formed in such a way that the light guide fiber can be inserted and withdrawn while maintaining its alignment. Such a mechanism is designated as a so-called "-dispersed plug-in mechanism."

Means for Solving the Problems According to the invention, the coupling sleeve is releasably coupled to a first member for fixing the position of the waveguide, and the coupling sleeve is releasably coupled to the first member. a second member for positionally fixing the element, and the member for positionally fixing the waveguide also consists of two releasably coupled members, the first of which is the second member has a blind hole filled with a steel ball, a waveguide is introduced into the narrow opening of the blind hole; The solution is that the wide opening of the blind hole is closed by a plug and a screw.

Embodiment According to an advantageous embodiment of the invention, the releasable connection is designed as a screw connection.

The steel ball located in the blind hole also preferably has a diameter of 0.5 mm.

Advantages of the Invention The advantage of the invention is primarily that optical waveguides manufactured at high cost are reliably protected from damage due to misalignment of the parallel beams emanating from the radar. The labyrinth of statistically distributed steel balls prevents even the most precisely focused, high-power Rede light from reaching the waveguide jacket or the bond within the capillary. Further, the generated heat is received and led out by the plug sleeve. A further important advantage is that, after the initial adjustment of the optical waveguide for the Rede beam, the waveguide can be replaced by simply replacing it without requiring any new adjustment. This is guaranteed.

In the cross-section shown in the exemplary embodiment, an optical waveguide 2 is introduced into the capillary tube 1 . After placing an optical waveguide 2 with its jacket removed about 8 degrees on each end into each centering hole and narrow opening 16 of members 10 and 11, the jacket of the waveguide 2 is inserted. The end portion includes a plurality of steel balls 12a.
It is located within the range of the blind hole 12 filled with.

The exposed end of the waveguide 2 runs out of the wide opening 15 and is connected to the plug body 1.
3 into the central hole, thereby closing the plug. The so-called plug sleeve thus formed is then tightened by a screw tightening ring 14.

Both holes 3, 4 in the member 10 of this coupling sleeve are filled with a suitable adhesive, which is placed around the inner wall of the capillary tube 1 and the jacket of the waveguide 2, and after its hardening. A fixed connection is formed between the waveguide 2 and the plug sleeve. Once the closure sleeve has been assembled, the sleeve 11 is screwed onto the member 10. The threaded connection is designated 8 in FIG. The element 6 surrounded by the sleeve 17 has an adjustment device for a focusing lens 7 with a short focal length. This adjustment device, which is not shown in the drawing, consists of a pressure screw accessible from the outside, by means of which the focusing lens 7 performs each rotational movement about a point in the peripheral device independently of one another. can be slid within the abscissas X and Y. In the axial coordinate Z, the adjustment in the focus direction is effected by a threaded sleeve 18 which captures the focusing lens γ. This adjustment device is fixed in its predetermined target position by means of a screwed ring 19. The member 5 of the coupling sleeve that fixes the waveguide 2 is a rubber-coated glass fiber reinforcing member 21.
It is surrounded by a metal mantle 20 that surrounds. The threaded connection between parts 10 and 11 is designated by 9. The aforementioned forced adjustment of the lens 7 to each end of the waveguide ensures the mutual consistency of each waveguide. What is required in this case is that the receiving device for the outer diameter of the sleeve 1γ used during the production of the system in question be matched with the corresponding structural parts of the radar device to be used subsequently.

[Brief explanation of the drawing]

The drawing shows a cross-sectional view of a coupling sleeve according to the invention. 1... Capillary, 2... Waveguide, 3, 4... Hole, 5,
6゜io, ii... Member, 1... Focusing lens, 8,
9... Screw joint portion, 12... Blind hole, 12a... Steel mail, 13... Plug body, 14.19... Screw tightening ring, 15.16... Opening, 17. ··sleeve,
18... Threaded sleeve, 20... Metal mantle, 2
1...Glass fiber reinforcement member.

Claims (1)

Claims: 1. A coupling sleeve for connecting a laser beam into an optical waveguide (2), the waveguide (2) comprising a capillary ( 1) in which the coupling sleeve connects the first member (5) fixing the waveguide (2) in position with this first member (5);
a second member (6) which is releasably coupled to the member (5) and which fixes the position of the connecting optical element (7); ) again consists of two releasably connected members (10, 11), of which the first member (
10) has holes (3, 4) for receiving adhesive, and the second part (11) has a blind hole (12) filled with a steel ball (12a), which bag A waveguide is introduced into the narrow opening (16) of the hole (12), and the wide opening (15) of the blind hole (12) is closed by a plug (13) and a screwed ring (14). A coupling sleeve for connecting a laser beam into an optical waveguide, characterized in that: 2. Connection sleeve according to claim 1, wherein the releasable connection is designed as a screw connection (8, 9). 3. Connection sleeve according to claim 1, wherein the steel balls (12a) have a diameter of 0.5 mm.