GB2248122A

GB2248122A - An optical reflection normal mountable on an optical fibre connection plug

Info

Publication number: GB2248122A
Application number: GB9116604A
Authority: GB
Inventors: Wolfgang Schmid
Original assignee: Wandel and Golterman GmbH and Co
Current assignee: Wandel and Golterman GmbH and Co
Priority date: 1990-08-04
Filing date: 1991-08-01
Publication date: 1992-03-25
Anticipated expiration: 2011-08-01
Also published as: GB9116604D0; DE4024775C1; GB2248122B

Abstract

A method of treating cellular immune deficiency in a patient including the steps of determining the presence of a cellular immune deficiency and co-administering to the patient an effective amount of a thymic peptide combined with an effective amount of an immunomodulating natural cytokine preparation.

Description

AN OPTICAL REFLECTION NORMAL The invention relates to an Optical

Reflection Normals which may be used as a reference magnitude when determining the reflection loss of optical components, e.g. optical plug and socket connectors. One of the most commonly used reflection normals is known from page 92 of Anritsu's 1988 catalogue and is produced in such a manner that an optical connection cable, which is provided at one end with a plug, is provided with a reflecting coating at its free end. In such case, the reflecting coating of the optical fibre forms the reflection surface of this Reflection Normal, whereby a reflection loss of approximately 0 dB is achieved. The provision of the reflecting coating on the fibre end is a complicated process, since the very small end face can only be vapour metallised in a vacuum. In addition, the combination of a plug and optical fibre, which together form the Reflection Normal, is impractical in operation.

A light-wave conductor sensor, which has a mirror surface at one end, is known from DE-A-38 04 135. The configuration of the mirror surface is not described more fully in this publication. Furthermore, a low-reflection circuit termination for lightconducting fibres is known from DE-A-36 11 299, wherein a sheet of glass, which has a low reflecting layer at its output end, is mounted on the end of the lightconducting fibre. There is no mention in this publication of the possibility of using such an arrangement for achieving a Reflection Normal.

The basic object of the invention is to create an Optical Reflection Normal, which has as simple a construction as possible and whereby virtually a 100% reflection is achieved.

According to the present invention there is provided an Optical Reflection Normal, which has a highly reflecting reflection surface and is mountable, as a termination, on an optical connection plug, including a glass f ibre end in a through-bore of a plug pin, said reflection normal comprising a terminal plug including a plug pin having a highly reflecting end face.

The reflection normal is formed by a compact terminal plug, the plug pin of which has a highly reflecting end face. It is very simple to produce the Reflection Normal, since a conventional plug is substantially used therefor, but the plug pin of such plug is not provided with an elongate bore for the accommodation of a glass fibre. The plug pin of this terminal plug, which serves as a Reflection Normal, has a continuous circular surface, which is polished and/or provided with a reflecting coating.

As with conventional connection plugs, the plug pin may comprise a plug pin core and a plug pin sleeve which surrounds the plug pin core, so that the production method for producing the reflection normal is largely identical to the method of producing conventional connection plugs. The plug pin core may be formed, for example, from steel, ceramics, glass, plastics material or soft metal, as is also the case with conventional connection plugs.

The invention is explained more fully hereinafter with reference to the drawings.

In the drawings:

Figure 1 illustrates a plug pin, which surrounds a glass fibre at the fibre end; Figure 2 illustrates a plug and socket connection having a reflection normal in accordance with the invention; and Figure 3 illustrates the two end faces of the two plug pins of the plug and socket connection shown in Figure 2, which end faces lie on/or adjacent one another.

In Figure 19 there is illustrated a portion of a conventional optical connection plug, namely the plug pin 1, which surrounds the end 2 of a glass fibre 3 (Figure 2). The parts of the connection plug, which accommodate or surround the plug pin 1, are not shown in Figure 1 for the sake of clarity. A screw thread 4 is provided on the free end of the plug pin 11 and a further connection plug or a Reflection Normal may be screwed tightly on said thread.

11 Figure 2 illustrates a plug and socket connection, which comprises the plug pin 1 of an optical connection plug 5 and a plug pin 6 of a terminal plug 7. which pin 6 is mirrored at one end. The two plug pins 1 and 6 are connected by means of a threaded sleeve 8, so that the mirrored end face 10 of the plug pin 6 and the free end face 11 of the plug pin 1 are in contact with one another in the contact plane 9. These two end faces 10 and 11 are illustrated in Figure 3.

When the Reflection Normal is formed by the highly reflecting end face 10 of the plug pin 6 and the glass fibre end 2 abuts against the highly reflecting end face 10.

Furthermore, it is apparent in Figure 2 that the plug pin 1, which is mounted on the end of a lightwave conductor 12, has a plug pin core 13. which surrounds the glass fibre end and is surrounded by a plug pin sleeve 14. The glass fibre 3 extends in the plug pin core 13 in an axial elongate bore 15.

The plug pin 6 is substantially constructed in the same way as the plug pin 1, but its plug pin core 16 does not have an elongate bore, with the result that the mirrored end face 10 forms a continuous circular surface. Depending on the intended use, different materials may be used for the plug pin cores 13 and 16 respectively, both in the case of the plug pin 1 and in the case of the plug pin 6. Steel, ceramics, glass, plastics material or soft metal may be used as the material. The plug pin sleeve 17 of the plug pin 6 may also be formed from the same material as the plug pin sleeve 14.

It is mentioned that the reflecting end face 10 of the reflection normal does not have to be additionally mirrored when suitable materials are used for the plug pin core 16 and the plug pin sleeve 17, but that the end face 10 may simply be a polished metal surface.

Claims

1. - An Optical Reflection Normal, which has a highly reflecting reflection surface and is mountablet as a termination, on an optical connection plug including a glass fibre end in a through-bore of a plug pin, said reflection normal comprising a terminal plug including a plug pin having a highly reflecting end face.

2. A Reflection Normal as claimed in claim 19 wherein the highly reflecting end faceis a circular surface of a plug pin core, which is surrounded by a plug pin sleeve.

3. A Reflection Normal as claimed in claim 1, wherein the plug pin core is formed from steel, ceramics, glass, plastics material or soft metal, and the end face is polished and/or provided with a reflecting coating.

4. An Optical Reflection Normal substantially as hereinbefore described with reference to the accompanying drawings.

Published 1992 at The Patent Office, Concept House, Cardiff Road, Newport. Gwent NP9 IRH. Further copies may be obtained from Sales Branch. Unit 6. Nine Mile Point. Cwmfelinfach. Cross Keys. Newport. NP I 7HZ. Printed by Multiplex techniques ltd, St Mary Cray, Kent.