DD297260A5 - OPTICAL CABLE - Google Patents

Abstract

In an optical cable having a cable member having a central member and band-shaped stranding members, it is provided that the band-shaped stranding members are respectively disposed radially outward with an edge from the surface of the central member so that the second edge is proximate to the austening jacket . {stranding passes; Light guide; optical fiber}

Description

For this 3 pages drawings

The invention relates to an optical Kabol according to the preamble of claim 1. Optical cables contain the optical Adorn

in the form of hollow or solid arbor. The individual veins are grouped together to form larger volumes, wolcho as

Stranding elements serve. From the European patent 76637 it is known to loosely insert optical wires into channels oinos profile body. The optical Veins have a high mobility in the grooves. however, this number is the number of veins in one Cable can be accommodated, limited. Besides, the possibility to find a bostimmto vein is only possible

due to special marking of the wires possible.

From the European application 165637 an optical cable is known, wolches inside a large number of optically Contains fibers which is constructed in the form of stacked opticalon bands. By the foste arrangement

The optical fibers are easy to retrieve and identify. However, this is only possible with certainty

Bend arrangement, although the arrangement is twisted around the longitudinal axis Is. By the pre-binding of the einolnen tapes

By means of a paint, the mobility of the individual bands is strongly limited against each other.

From the generic US Pat. No. 3,883,218, an optical cable is known, which is a central strain relief torque

having wound around optical bands. These bands, however, do not fill the cable sufficiently because they must be hooped around a relatively large inner diameter so as not to be too much subject to bending.

Dor invention is the object of an optical cable of the kind mentioned above, an arrangement of

bandförmigon to create optical elements, wolcho allows recording as violet optical fiber in the Kabol.

In addition, these fibers should be easily identified during splicing. This object is in an optical cable of the type mentioned by the invention by the in the license plate of Claim 1 mentioned features solved. Embodiments of the invention are nachstohond based on the Zoichnung

explained in more detail. Dabo! shows

Fig. 1: a piece stripped cable element In perspective view; Fig. 2: various embodiments of band-shaped elements with embedded optical fibers; Fig. 3: a particularly tensile embodiment of a cable element and Fig. 4: a particularly space-saving embodiment of a cable element. An optical cable typically contains several cable leads, preferably around a refractory grain

linds away. 1 and 2) contain optical fibers in the form of band-shaped elements I ₁ which, according to the invention, each have an edge 3 from the surface of a central element 2 radially outward. The iwan account 4 is then jowoili in dor near dosonmantols 6.

These band-shaped elements 1 are in olnor simple embodiment with a constant impact around the Zontralolomont. 2

pilot rushes; v - 'h.. the bands are helically arranged around the central pole 2.

Between din optical Elomonten 1 iur reinforcement element * 7 may be provided. Dio gaps iwischon don

oimelnon ribbon-shaped Elomonton are filled with Quollpulvor odor potrolate. In the ellgomolnon the canton 3 are the Qur'or 1 and / or 7 with the Central Olomont 2 fost vorbundon. For bossoron pre-binding, account 3 is glued to dom central oligorite 2, and edge 4 to dom mantle 5. On the other hand, dio Kanto 3 can be arranged in grooves of Zontralolomonts.

The support element 7 is preferably aufgobaut from Qiasfilamonton, tungche are vorgosohon as Zugonlastungsolomonto. Dio Supporting monuments 7 may also be wedge-shaped so as to reduce the cavities in the Kabololomont. To the To produce adhesion between shell 5 and core 2, the edges of the Stützolemonte 7 with dom mantle and dom grain

vorklobt.

In dor embodiment of Fig. 3 it is provided that the band-shaped elements olnon double-T Querschnltt aufwoison. BoI this Construction is the scaffold stigkoit of the bands of Bodeutung; because only then can tensile forces from Mantol 5 on the Zontraleloment 2 become transmortron, In Fig. 2a, a tape is shown in which the optical waveguides 8 are embedded in the bandebone with an overlength. Dio oinzolnen Lichtwollonloiter are dabol arranged in the form of olnor sinuskurvo. In Flg. 2b are the Lichtwellonleitor senkrocht to Bandebono

arranged with excess length. In Flg. 2c Is the whole band easily wanted. Dio Lichtwellonloitor 8 are parallol to don

Boundary surfaces of the belt 1 is arranged. All known types of optical band-gaps for the optical bands 1 can be used. Preferably

are dios by a plastic wrap verklobto parallol arranged optical wires. Dio optical cores are made by multiple coating of plastic or optical fibers with plastic.

In a further preferred embodiment of the invention, the outwardly coilförmlg expanding cavities

eliminated by the fact that the optical elements 1 and the support element © 7, which initially have radially outward from the surface of the core 2, are increasingly curved with increasing radius. As a result of this curvature these optical form

Elements with the radius have an outwardly increasing Winkol α. It is cos α - r _o / r. An example of such a Kabolelement Is shown in Klg.4. Owing to elasticity of optical elements and supporting moments it is possible to them

in addition to give a sense of screw around the axis of the cable element: they are around d. η core 2 stranded. The strike lengths are preferably between 25 and 40cm.

Incidentally, the optical cable made of the cable members is aufgobaut conventional methods. The central one Core of the cable can also be gobildet by oin cable element. To this cable moment are six more Kabololomonto

stranded. The further construction of the cable can be multi-layered or in bundle form in the usual Woiso.

Claims (12)

1. Optical cable with a Kabololomont, wolchos a Zentraleloment ur> d band-shaped optical elements wails, characterized in that the band-shaped elements (1) each with olnor edge (3) from the surface of the Zontraleloments (2) are arranged radially outwardly stohond in that the second edge (4) runs in each case in the vicinity of the outer mandrel (5). 2. Knbeiolomont according to claim 1, characterized in that doli zwischon band-shaped optical elements (1) bandförmige Stützolemento (7) vorgosohonslnd, wolchomltdonElomonton (1) to dtis Zentralolement (2) are pledged. 3. Cable element according to claim 1 or 2, characterized in that the band-shaped elements (1,7) are stranded with constant impact to the central moment (2). 4. Cable element according to claim 1 or 2, characterized in that the band-shaped elements (1,7) are stranded with alternating blow to the central element (2). 5. Cable element according to one of claims 1 to 4, characterized in that the canton of the band-shaped elements (3) with the central element (2) are firmly connected. 6. Cable element according to one of claims 1 to 4, characterized in that the edge (3) in grooves (6) of the central element (2) is arranged. 7. Cable element according to one of claims 1 to 6, characterized in that the supporting element (7) constructed of glass filaments and is provided as a strain relief element. 8. Cable element according to one of claims 1 to 7, characterized in that the spaces between the individual elements (1.7) contain a filling compound. 9. Kabelelemant according to one of claims 1 to 8, characterized in that the supporting elements (7) are wedge-shaped. 10. Cable element according to one of claims 1 to 9, characterized in that the band-shaped elements of a radial direction distribution at the edge (3) in a tangential direction distribution in the vicinity of the edge (4) pass. 11. Cable element according to one of claims 1 to 10, characterized in that the band-shaped optical element (1) has parallel running fibers (8) which are interconnected. 12. Cable according to claim 1, characterized in that the cable element forms the central core to which the further cable elements are arranged.