Abstract: The present invention relates to a plug which makes it possible with the help of an interconnecting device to position and connect in pairs optical fibres pertaining to optical cables. The positioning of each optical fibre is achieved by a three-elements set of cylindrical rods 21 arranged in the bushing of the plug. Each rod of the three-elements set has two generatrices in contact with its two neighbors, and one generatrix in contact with the introduced optical fibre. A hardenable bonding medium is introduced for cementing together said bushing, said rods and said optical fibre.

Abstract: The invention relates to optical communications by bundles of optical fibres. More particularly, the invention relates to a branching fiber optic connector device for optically and mechanically connecting two bundles of optical fibres with a single optical fibre and for supplying an electrical signal characteristic of the incident optical energy obtained by extracting part of the radiation in said fibre by means of a photodiode sealed to said fibre after removal of the cladding over a surface corresponding to the detecting surface of the photodiode, the refractive index of the sealing material being higher than the refractive index of the cladding.

Abstract: A stripping tool for stripping ends of cables containing multiple conductors surrounded by an external protecture sheath, intended in particular for stripping optical fibre bundles. It comprises two gripping devices to clamp the cable in two separate areas by means of an adjustable compression on the sheath surrounding the conductors, a control device to position one of the gripping devices so as to stretch axially the sheath lying between thw two areas, and a cutting device to cut a piece of sheath of the desired stripped length; the distance between the areas and the extent of the stretch are predetermined on the basis of the elasticity of the sheath and the length to be stripped.

Abstract: The invention has for its object a reading arrangement which uses a source functioning by pulses and delay-action dividing optical means which successively ensure the illumination of M storage areas of the recording, each area comprising P bits 0 and 1. Thus, a single reading pulse makes possible the reading, with a mosaic of P photodetectors, of a block which comprises M words of P bits. The invention is particularly applicable to non-destructive optical reading stores, for instance holographic stores.

Abstract: The present invention relates to an electro-optical converter with storage facility.The converter is constituted essentially by a panel comprising a substrate covered by two dielectric layers, cells containing a gas being made in said substrate and two sets of electrodes arranged on said dielectric layers, one of the dielectric layers being a flexible diaphragm capable of local and permanent deformation under the action of electrostatic forces.The invention is more particularly intended for the recording of optical information.

Abstract: An optical radiation generator, controlled by an input current, comprising a light emissive diode optically coupled to an optical waveguide and a photodiode located close to the radiating surface of the emissive diode for picking off a part of the optical radiation and for delivering a feedback current which is used in a current negative feedback loop. The light emissive diode, the extremity of the waveguide and the photodiode are encased in a transparent material providing optical coupling and mechanical stability.

Abstract: The invention provides a method for simultaneously identifying the location of all those words which, in a page store, are identical to a key word. The words of a page exhibiting at least the same 1 value as the keyboard are classified in a first set, and those exhibiting at least the same 0 value, in a second set, the identified words being those belonging to both sets. The invention also describes two embodiments of an optical device for implementing the method in an associative optical store; in both embodiments, two identical images of the page store are respectively projected onto two detection planes constituted by detection rows, through two modulation plane constituted by modulating columns.

Abstract: The present invention relates to a variable coupler for optical fibers, which can also operate as a mixer. This variable coupler comprises an optical system which concentrates the divergent radiation issuing from the output orifice of a transmitter fiber, on the input orifice of a first receiver fiber, and optical means (flat mirror, prism, plate with parallel faces, for example) capable of performing a translatory motion, which make it possible to intercept a variable fraction of said radiation and direct it on to the input orifice of a second receiver fiber.

Abstract: The device comprises a flexible magnetic sheet reflective on one side, at least one magnetic circuit associated with at least one zone of the sheet for deforming the sheet by a modification of the magnetic flux in the magnetic circuit. Exciting means controlled by electrical data vary the magnetic flux so as to modify the reflecting conditions in said zone as a function of the electrical data.A unit for recording holographical optical memories is disclosed which employs this device.

Abstract: A system for creating independent communication channels using a single optical fibre, is provided. To this end, at the transmitting end, several "laser" diodes such as that E.sub.11 (FIG. 1) supply infrared rays of a wavelength defined to within at least 50 angstrom units (in the case of suitably doped gallium arsenide diodes), to selective mirrors such as that M.sub.11 which are quasi-transparent vis-a-vis other wave lengths. These rays focussed along with those coming from other diodes, upon the entry face 11 of the fibre. At the receiving end, there is an arrangement similar to that at the transmitting end, but comprising, instead of the diodes, photodetectors. A diode and a photodetector may be exchanged in order to provide a channel operating in the reverse direction.

Abstract: A cinematographic film to be reproduced by television is driven at constant speed in synchronism with the sweep cycle of one or more camera tubes each positioned to pick up images projected upon a receiving surface thereof whose luminous persistence equals at least a sweep cycle. The film is periodically transluminated, during the retrace phase of the scanning beam, by a light pulse emitted by an electroluminescent diode -- or by a cluster of such diodes operating on different wavelengths -- defining a quasi-pinpoint light source, the diode being excited by an energizing pulse whose length does not exceed the duration of a line scan of the camera tube.

Abstract: In the telecommunication system using optical fibers, each terminal or repeater station comprises negative feedback via an optical channel, the output electroluminescent diode being coupled to the input photodiode by an optical fiber.