Optical waveguides – Optical transmission cable
Patent
1991-11-22
1994-01-18
Ullah, Akm E.
Optical waveguides
Optical transmission cable
439245, G02B 644
Patent
active
052805549
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a connector that an adaptor fits onto and that a cable with at least one core and at least one layer of insulation can be connected to.
Examples of connectors of this type are the plugs and jacks that a cable can be connected to. A plug and a jack can be used to connect two cables together or a cable to a piece of equipment. Communications utilizes both electric and optical cable and a special connector is needed for each type.
SUMMARY OF THE INVENTION
A plugging component that an electric cable with several insulated cores is connected to is known from German OS 3 338 232. In addition to the electric cores, it has an optical signaling conductor that has an optical transmitter at one end and an optical receiver at the other. The transmitter is in one plugging component and the receiver in another. Since these plugs, however, have only electric contacts, it is impossible to transmit optical signals by way of one plugging component inserted into another.
A connector for a light conductor that is also equipped with an electric contact for an electric core is known from European Application 0 164 993. A light conductor and an electric cable must accordingly be attached to this connector in order to transmit both optical and electric signals.
It is accordingly the object of the present invention to improve such a connector so that, when it is attached to a cable with at least one core and one transparent layer of insulation, it will be able to transmit both electric and optical signals.
This object is attained in accordance with the invention in that the connector is transparent for the purpose of optical coupling where the layer of insulation on the cable rests against it.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates one embodiment of a connector in accordance with the invention by way of example and
FIG. 2 illustrates an adaptor that fits the embodiment
FIG. 3 illustrates a schematic view of an assembly of components of FIGS. 1 and 2.
FIG. 4 illustrates an optical transmission system in accordance with the invention.
The invention will now be specified with reference to the figures.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The video signals in a combination video recorder V and television set F are transmitted over coaxial cable. Control signals must also be transmitted along with the video signals. This can be done optically if the layer of insulation that functions as a dielectric between the inner and outer conductors in the coaxial cable is made of optically conductive material. In other consumer-electronic equipment, information is transmitted over a simple cable, between a compact-disk player and an amplifier for example. In this case as well it is possible to create additional information channels by making the layer of insulation of optically conductive material. Thus, optical signals can be carried in addition to the electronic signal, or to the electricity in the power cord, if the insulation is made of optically conductive material. To connect such cables together or to the equipment, however, special connectors are necessary.
FIG. 1 illustrates a connector VS in the form of a plug connected to a single-core cable K.
Plug VS is accommodated in a tubular sleeve H that extends over part of cable K. Paralleling the axis of sleeve H is a pin S that is electrically connected to the core A of cable K. Between pin S and sleeve H is a tubular coupling L with a cross-section that preferably matches the cross-section of the layer I of insulation around cable K. Layer I of insulation can rest against optical coupling L but need not do so, because any space between the two components, although it might attenuate the optical connection, could not interrupt it. The light, indicated by the arrows, travels from layer I of insulation into optical coupling L, emerges from its face, and enters for example the optical coupling of a jack VB that plug VS fits into and that is illustrated in longitudinal section in FIG. 2.
The outside of the jack VB in
REFERENCES:
patent: 3399012 (1968-08-01), Peters
patent: 5146528 (1992-09-01), Gleim et al.
patent: 5169716 (1992-12-01), Croft et al.
Gleim Gunter
Quandt Siegfried
Deutsche Thomson-Brandt GmbH
Fogiel Max
Ullah Akm E.
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