Device for breaking optical fibres

FIELD: physics; optics.

SUBSTANCE: invention relates to devices for splitting optical fibres, specifically to manual portable instruments. The mechanism for breaking optical fibres contains apparatus for breaking fibres and one or more clamping elements which can clamp an optical fibre at one end, which should be cut off, and apply a pulling force so as to stretch the fibre when breaking it. The mechanism is designed such that, the clamping element(s) can also push the broken part of the fibre using devices which enable the clamping element(s) to continue applying a pulling force to the cut off part of the fibre after breaking. The clamping element or each clamping element releases the cut off part when moving the cut off part of the fibre.

EFFECT: high quality joining and reliability of fibres.

11 cl, 15 dwg

 

The present invention relates to a device for cleaving optical fibers, in particular to hand-held portable instruments. The present invention also relates to a mechanism for cleaving optical fibers, mainly to obtain the beveled end faces of the fibers, suitable for splicing through the device for splicing fibers.

There are two known main method of splicing together optical fibers: mechanical splicing and splicing optical fibers by fusion (the ends). Mechanical splicing has the advantage that it does not require the use of tools with electric drive and, therefore, it is suitable for use in place of the optical communication network, for example, in the external environment or in the premises of the user depending on the location on the network where you want to splice. Although it can be made highly reliable mechanical connection of optical fibers end-to-end, mechanical connection of optical fibers end-to-end often do not provide low optical loss, or long term reliability of splices of optical fibers by fusing the ends. Therefore, for many situations splicing optical fibers by fusing the ends are preferred over mechanical splices of optical fibers of VSTi is.

For splicing optical fibers by fusing the ends in which the ends of optical fibers fuse together (for example, by means of electric discharge applied to the ends of the fibers), the required electric power. Known portable hand tools for splicing optical fibers by fusing the ends, battery powered, which is used for splices of optical fibers by fusing the ends in place. However, although the problem of portability partially solved thanks to this portable device for splicing optical fibers, remains another problem associated with the formation at the location of splices of optical fibers by fusing the ends; it is the problem of training of end surfaces of the optical fibers so that between the end surfaces can be formed in a satisfactory bonding by fusing the ends. For the formation of satisfactory splicing optical fibers by fusing the ends need to provide high-quality, clean end-faces of optical fibers; this requires the splitting of the fibers to remove their existing end parts and obtain fresh, high-quality end-faces. Known portable tools for splitting optical fibers, however, for Tarceva the surfaces of the optical fibers of sufficient quality to high-quality education splices of optical fibers by fusing the ends of in General, you want a stable working platform for portable tool for cleaving optical fibers. The consequence of this is that once the optical fiber is split, a device for cleaving an optical fiber on a plane should be placed aside and the split optical fibre must be moved to krasivaya instrument.

The present invention is directed to solving the above problems and to provide educational opportunities truly high-quality splices of optical fibers by fusing the ends to secure and normal way.

In accordance with this first aspect of the present invention provides a mechanism for cleaving optical fibers, provides for a means for cleaving fibers and one or more clamping means capable of clamping the optical fiber and applying traction to stretch the optical fiber, while the fiber breaks, and the clamping element (s) also provides push the broken away portion of the optical fiber as the optical fiber was split.

Preferred embodiments of corresponding to the present invention have the advantage that the combination of mechanism for splicing optical molokani mechanism for cleaving optical fibers in a single device eliminates the problem of transmission of the split optical fibers from the device for cleaving an optical fiber to a separate device for splicing optical fibers (which is associated with the risk of pollution and damage to the optical fibers).

In preferred embodiments of implementing the present invention, the mechanism for splicing the optical fiber device is a mechanism for splicing optical fibers by fusing the ends, designed for the formation of splices of optical fibers by fusing the ends. Thus, the mechanism for splicing optical fibers preferably may include electrodes located to provide an electric discharge to generate splicing optical fibers by fusion between the ends of the optical fibers.

The mechanism for cleaving the optical fiber device is preferably able to split the optical fiber for receiving the end face of the optical fiber, suitable for splicing an end face of another optical fiber through a mechanism for splicing optical fibers. The mechanism for cleaving optical fibers is more preferably capable of splitting the optical fiber for receiving the end surface of the optical fiber, which is essentially perpendicular to the longitudinal axis of the optical fiber.

The mechanism for cleaving optical fibers may contain a tool for cleaving optical fibers, mainly the work of the organization is for cleaving an optical fiber, for example, the blade, mainly cutting plate (nattawee blade) for the formation of grooves on the optical fiber, inducing a crack to propagate through the optical fiber, providing in accordance with this splitting of the optical fiber. Cutting plate for the formation of the notches is preferably in the form of a disk for the formation of the notches. The drive for the formation of grooves may, for example, have a diamond blade or instead may be used with another form of the insert to form the notches, for example, formed of diamond. The mechanism for cleaving optical fibers may additionally or alternatively contain the support, which makes the optical fiber to bend during splitting (for example, while the optical fiber received the notch by cutting the plate). The mechanism for cleaving an optical fiber may include one or more clamping and/or support the optical fiber elements for clamping and/or maintaining optical fiber during cleaving.

The broken away part of the optical fiber preferably is pushed through the clamping element (elements), continue to apply pulling force to the broken away portion of the optical fiber after cleaving. One ricardy the clamping element preferably weakens the clip on the broken away portion of the optical fiber after cleaving.

One or each clamping element is preferably able to rotate around an axis oriented in principle perpendicular to the longitudinal axis of the optical fiber clamped clamping element. Pulling force applied to the optical fiber by one or each clamping element may, for example, be applied by the application of torque to push the element.

Clamping elements may preferably contain a pair of opposite clamping elements capable of clamping the optical fiber by crushing the optical fiber between them.

Clamping elements are preferably offset to select open position, in which the optical fiber clamp clamping elements can be placed between these elements up until the clamping mechanism will not operate, after which the clamping elements clamp the optical fiber.

The splitting mechanism or device for splicing optical fibers corresponding to the present invention, may include a receiver for landfill, located to receive pushed the broken away portions of the optical fibers of the clamping elements.

In particularly preferred embodiments, the implementation of the present invention the device further comprises one or more separate clamping blocks for clamping on the op is practical fibers, subject to splitting and merging by means of this device. The device may preferably include one or more retaining means for retaining the clamping blocks are pressed to the optical fiber during cleaving of the optical fiber and/or splicing of optical fibers. The retaining means may, for example, encourage or provide opportunities for movement of the clamping block between the mechanism for cleaving optical fibers and a mechanism for splicing optical fibers. Additionally or alternatively, the retaining means can be located for positioning relative to each other of the ends of the optical fibers locked in clamping blocks so that the ends of the optical fibers can be spliced together by means of one mechanism for splicing optical fibers.

In some embodiments, implementation of the present invention, the device may include an optical system for monitoring, through which is provided a current control combination and/or the proximity of the ends of the optical fibers locked in clamping blocks, for example, by means of light transmitted at least via one of the optical fibers. Such monitoring system is well-known qualified specialists in this field of technology. Eliminate the properties may include the control system, through which is regulated by the combination and/or the proximity of the ends of the optical fibers locked in clamping blocks by holding means, when using the information about the alignment and/or proximity is obtained, for example, the monitoring system. The device, especially the retaining means may include a piezoelectric mechanism (or other mechanism) for positioning the ends of the optical fibers locked in clamping blocks.

The device or mechanism preferably is a portable tool, mainly hand tools.

The mechanism for cleaving an optical fiber and/or a mechanism for splicing optical fibers preferably is (are) driven electrically, preferably battery-powered.

Further example will be described some preferred embodiments of with reference to the accompanying drawings, where:

Figure 1 - types (a) and (b)illustrating a first variant implementation of the handheld portable device for splicing optical fibers corresponding to the present invention;

Figa - other (partial) view of the first variant of implementation of the device for splicing optical fibers.

Figw - detail illustration figa;

Figa - additional (partial) view of the first is th option exercise device for splicing optical fibers;

Figw - item figa;

Figure 4 - types (a) and (b)illustrate a second variant implementation of the handheld portable device for splicing optical fibers corresponding to the present invention;

Figa - other (partial) view of the second variant of realization of the device for splicing optical fibers.

Figw - detail illustration figa;

6 is a species (a) and (b)illustrate additional (partial) views of a second variant implementation of the device for splicing optical fibers corresponding to the present invention;

7 is a partial section view of a part of the preferred mechanism for cleaving optical fibers corresponding to the present invention;

Fig is another mechanism for cleaving optical fibers illustrated in Fig.7;

Fig.9 - additional views (a) and (b) a mechanism for cleaving optical fibers illustrated in Fig.7 and Fig;

Figure 10 - illustration of the details of some components of the mechanism for cleaving optical fibers illustrated in piggy-9.

On figa and figv illustrates a first variant implementation of the handheld portable device 1 for splicing optical fibers corresponding to the present invention. A device for splicing optical fibers contains a mechanism 3 for splicing optical is elocon and the mechanism 5 for cleaving optical fibers.

The mechanism 5 for cleaving optical fibers on a plane is most clearly illustrated in figure 2 and figure 3; it contains the cutting plate in the form of a disk 7 for the formation of the notches, which are movable essentially in the plane of the disk so that he could approach and make a notch on the optical fiber 9, held by the device. As illustrated, the optical fiber 9 has a clamping block 11, squeezed on it. The clamping block 11 contains the main part 13 and two support parts 15 which are mounted (for example, through magnetic attraction, but there are also other mechanisms of attachment) to the main body 13 to clamp the optical fiber 9 between the main part and each of the auxiliary part. The clamping block 11 (with optical fiber 9, the clamped therein) is inserted into the retaining means in the form of the receiving groove 17 in the device 1 for splicing optical fibers so that the end part of the optical fiber 9 can be entered and clamped in the aperture 19 in the device. When the clamping unit 11 and the optical fiber 9 are arranged as shown in figure 2 and figure 3, part 21 of the optical fiber 9, passing between the clamping block 11 and the aperture 19, is oriented essentially perpendicular to the drive 7 for the formation of the notches. After that, as illustrated in figure 3, is activated (preferably electronically via the keyboard is URS 23) a mechanism for cleaving optical fibers, encourage the drive for education notches closer to the optical fiber 9 and do on the optical fiber cut. Cleaving the optical fiber 9 is completed by a support (not shown) of the mechanism for cleaving optical fibers, which rejects the part 21 of the optical fiber, causing the propagation of cracks through the optical fiber with notches on its surface. The split creates a new end surface of the optical fiber 9, which is essentially perpendicular to the longitudinal axis of the optical fiber.

Now let us return to figure 1 (types (a) and (b)), the mechanism 3 for splicing optical fibers of the device 1 is separated from the mechanism 5 for cleaving optical fibers swivel screen 25. Once the optical fiber is cleaved and a new one created perpendicular to the end surface of the optical fiber, the clamping block/fiber node is manually moved from the mechanism 5 for cleaving optical fibers on a plane and installed in the mechanism 3 for splicing optical fibers. (The clamping unit 11 remains trapped on the optical fiber 9 for further technological operations splicing.) Mechanism 3 for splicing optical fibers includes retaining means in the form of a precision platform 27 (in General, in the form of a groove, as illustrated in the drawings). As soon as it is on the second optical fiber was split in a similar way, as described above, its clamping block/fibre to the node (i.e., optical fiber clamping block, still squeezed on it) manually move of the mechanism 5 for cleaving optical fibers on a plane and set in precision platform 27 of the mechanism 3 for splicing optical fibers oriented so that the new end faces of two optical fibers facing each other. (That is, the second optical fiber is positioned exactly in the opposite orientation, i.e. at an angle of 180 degrees relative to the first optical fiber).

After that, two optical fiber 9 to be merging, combining and hold in proper proximity to the surface-the surface to ensure splicing optical fibers by fusing the ends through precision platform 27. Optical fibers are moved relative to each other through their respective clamping blocks 11, which are moving on a precision platform 11 with the piezoelectric mechanism or another mechanism (e.g., electric motors). Proper alignment and proximity, positioning these two optical fibers are subjected to current control and can automatically be adjusted by means of the optical system of the current control/management. This system monitoring/management of COI is lesuit light, passed along and/or at least one of the optical fibers, and the current control and regulate the proper positioning of optical fibers based on light, detektiruya of the end faces of optical fibers and/or optical fibers.

As soon as the end faces of two optical fibers 9 is properly positioned relative to each other for splicing optical fibers by fusing the ends of the splicing of optical fibers is carried out by means of electrodes (not shown) of the mechanism 3 for splicing optical fibers by fusing the ends, which create an electrical discharge, which fuses the end faces of optical fibers together by localized high temperatures. During the process of fusing the end faces of two optical fibers can be pushed together to ensure correct defect-free fusing. Rotary screen 25 is oriented plane, so that it essentially covers the mechanism for splicing optical fibers and optical fiber to protect the operator from electric discharge. As soon as the splicing of optical fibers by fusing the ends created and optical fiber cooled, auxiliary parts (15) are removed from the clamping of the components is 11, providing in accordance with this, the possibility of removal of the fused optical fibers from the device 1.

Figs.4-6 illustrates the second preferred implementation of the device for splicing optical fibers corresponding to the present invention. The device 1 contains a mechanism 3 for splicing optical fibers, the mechanism 5 for cleaving optical fibers in the plane of the panel 23 electronic control and rotary screen 25. This alternative implementation of the present invention is similar to the variant of implementation, illustrated in figure 1-3, except that in this embodiment, the mechanism 3 for splicing optical fibers and the mechanism 5 for cleaving optical fibers on a plane are essentially parallel to each other, so that the clamping blocks 11 that holds the optical fiber to be splitting plane and merging, are essentially parallel to each other.

The mechanism 5 for cleaving optical fibers on a plane corresponding to the second variant of implementation of the present invention, shown in detail in figure 5 and 6. The mechanism for splitting optical fibers contains two pairs of clamping the optical fiber elements, and each pair is located on the corresponding side of the cutting plate 7 for education zarobki the optical fiber in the form of a disk for the formation of the notches, and the Central support 29. Each pair of clamping an optical fiber elements includes a stationary clamping element 31 and the movable clamping element 33, which preferably is movable due to the electronics panel 23 e-governance. When using movable clamping elements 33 are moving from their respective stationary clamping elements 31 to provide clearance between the elements to provide the possibility of introducing the optical fiber between them. As shown in figure 5, the optical fiber 9, clamped in the clamping unit 11, is located in the mechanism for cleaving the optical fiber so that a portion 21 of the optical fibers passing from the end face of the clamping block was located between the fixed clamping element 31 and a movable clamping element 33 of each pair of clamping elements. After that, as shown in figa, each movable clamping element 33 moves to its corresponding stationary push-on element, clamping in accordance with this optical fiber between the elements. As shown In figure 6, the cutting plate 7 (the blade) to form a ledge, then moves against the optical fiber to create notches in the optical fiber. The Central support 29 then moves against the optical fiber between the two pairs of clamping elements and applies pressure to pricescom fiber so to reject it a bit in the area between the two pairs of clamping elements. As shown in Fig.6, the support 29 has a Central groove which is oriented essentially perpendicularly to the optical fiber, the groove is adjacent optical fiber. The optical fiber is split support 29, deflecting optical fiber on both sides of the optical fiber against the notches (i.e. on both sides of the groove in the support), between the two pairs of clamping elements. This deviation causes the propagation of cracks through the optical fiber from the notches, creating a new beveled face of the optical fiber, which is essentially perpendicular to its longitudinal axis. Alternatively, the cutting plate (for education notches) moving against the optical fiber with the subsequent deviation of the optical fiber support 29 of the cutting plate 7 for the formation of the notches may be essentially fixed, but instead the formation of notches and crack penetration can be achieved by application of pressure bearing against the optical fiber with the application in accordance with this pressure against the cutting plate for the formation of the notches.

7 to 10 show various aspects of a preferred mechanism for cleaving an optical fiber along a plane corresponding to the present invention. Illustrare the initial mechanism for cleaving optical fibers on a plane can be a component of a device for splicing optical fibers, corresponding to the first aspect of the present invention, or it may be a mechanism for cleaving optical fibers on a plane corresponding to the second aspect of the present invention.

The mechanism 5 for cleaving optical fibers in the plane contains the cutting plate 45 for the formation of the notches (see Fig.9) and a pair of opposite clamping elements 35. Clamping elements 35 are arranged to rotate around the corresponding points 37 of the rotation, and the axis of rotation is oriented essentially perpendicular to the longitudinal axis of the optical fiber 9, clamped with clamping elements. Clamping elements 35, in fact, each clamping element, contain swing arms 39 and a separate clamping part 41, which is in the grip end of the pivot arm, closest to the optical fiber 9. When the mechanism for cleaving optical fibers on a plane is not in use, swing arms 39 of the clamping elements 35 biased by respective springs 43 (see Fig) in directions opposite to the directions indicated in Fig.7. the arrow P, so that between the two opposite clamping portions 41 provided gap. The optical fiber that is designed for splitting, is injected into the cylinder 43 to the input optical fiber to until the end of the optical region in the fibre will not pass between the opposing clamping portions 41, as shown in Fig.7. When the mechanism for cleaving optical fibers activated (preferably electronically), swing arms 39 are rotated in the directions indicated by arrows R (rotation) figure 7, due to the application of torque. This turning of the levers 39 urges the locking part 41 to face together due to the deadlock of each pivot arm 39 with its respective exciting part. Consequently, the clamping elements 35 is clamped optical fiber 9 and also exert pulling force in the direction indicated by the arrow T (tension) figure 7, which causes the optical fiber in tension. After that, the optical fiber 9 is split by the cutting plate 45 for the formation of notches in interaction with the deflector support 47, while the optical fiber is maintained under tension, reported clamping elements 35. The broken away part of the optical fiber 9 then stalkivaetsja in the receiver 49 to waste through the clamping elements 35.

As shown in Fig and Fig.9, the cutting plate 45 for the formation of the notches (which is preferably a diamond blade is carried by the support plate 51 of the insert. Bearing 47 is shown in Fig-10 and has the groove 53, which performs a similar function to that of the support groove 29, as illustrated in figure 5 and 6.

Additional aspects of the present invention may become apparent by comparison with the European patent 0985160 and U.S. patent No. 6578747, issued by Oxford Fiber Ltd. ("Oxford"). It is noted that patents Oxford limited tools for splitting optical fibers on a plane, having a support, a cutting tool between a pair of spaced apart clamping means, and clamping means described as holding and exciting and applied pulling force to pull the segment of optical fiber between them. Patents Oxford require that their cutting plate 13 for splitting optical fibers in a plane forming a notch in the optical fiber, while it is bent between close adjacent optical fiber deflection angles of support 10 or one of the stationary clamping means 5 or the support 10 and an additional element 26, entered into a limited space (for example, 1 mm) between the support 10 and the clamping means 5.

In contrast to patents Oxford design tool for cleaving optical fibers, represented by the company Toso, provides a different and preferred mechanism in which the cutting plate for splitting optical fibers associated with a movable angle (below the "turning") deflecting optical fiber element, preferably a swivel dual arm, which can be far separated (preferably more than 1 cm, and more preferably at least 2 cm) from each of aginaga element. This mechanism tool for cleaving optical fibers on the plane, offered by the company TUSO can become quite obvious from the example illustrated on 11-15 of the accompanying illustrative drawings that enhance the structural elements already described in Fig.7-10.

Figure 11 illustrates our deflecting bearing 47 which is rotatable coaxial reference block, and the associated support plate 51 of the cutting plate for cleaving optical fibers. Individual controlled lever clamping tool (similar to the tool described in more detail with reference to Fig.7), is intended for the application of the tension of the pulling force to the optical fiber F in position preferably below the node bearing/blade.

On Fig and pig respectively illustrate the open and closed condition of the other clamping element 60 which clamps the optical fiber F on the other side of the support (the side remote from the above-driven clamp lever (C). The clamp 60 is separated from the site of the cutting plate and support along the fiber length that is similar to or greater than the distance of the clamp from the support.

On Fig and Fig in more detail below, shows the swivel support site, having features of the invention, the company TUSO. The optical fiber F is shown in Fig positioned in the guide grooves G ETS is sung R, positioning the optical fiber in the lateral direction so that the optical fiber is passed through the transverse supports 1 and 2. Paired reference block is rotatable in the direction of the arrow A, is partially regulated by illustrated rods R' regulation of movement in grooves formed in the bearing block in such a way as to move the support 1 at an angle from right to left (arrow a') and support 2 at an angle from left to right (arrow A). On Fig illustrates the node after the angular movement of the curved optical fiber F around acting in the opposite direction of the poles 1 and 2, ready for movement of the blade 62 for the formation of a ledge, and splitting a bent optical fiber. After cleaving the optical fiber supporting unit is returned to its original position, being ready to receive the next optical fiber to be splitting.

Alternatively, you can position the rotary coaxial bearing block so that any of the pillars remained more or less stationary relative to the optical fiber, while the other bearing was moving at an angle to perform the bending of the optical fiber acting between the opposite corners of the supports.

The guide grooves G of the rods R preferably have such a size to allow relatively free PR the longitudinal movement of the optical fiber F in the grooves, while longitudinal traction is applied to the optical fiber of the above-mentioned remote terminals TUSO. This unit clamps Tuco from the site of the tower/blade has the technical advantage of facilitating the acquisition and convenient tool allowing controlled by the lever clamp to ensure popping or "firing" to move off the end portion of each subsequent fiber down to an acceptable receiver 49 for safe disposal, as described in more detail with reference to Fig.7.

Rotary deflecting optical fiber design company Toso having features of the invention may, of course, be combined with any of the other elements of the mechanism for cleaving optical fibers on the plane, described in the application above.

1. The mechanism for cleaving optical fibres, containing the means for cleaving fibers and one or more clamping elements capable of clamping the optical fiber at one end, which must be broken away, and to apply pulling force to stretch the fiber during cleaving of the fiber, and the mechanism is arranged in such a way that the clamping element (s) are able to push the split portion of the fiber after cleaving of the fiber by means of devices, allowing the clamp e is the elements (element) continue to apply pulling force to the split parts of the fiber after cleaving of the fiber, when this clamping element or each clamping element (s) weakens your clip on the broken away portion of the fiber during the movement of the broken away portion of the fiber.

2. The mechanism according to claim 1, in which the clamping element or each clamping element is able to rotate around its axis, oriented in principle perpendicular to the longitudinal axis of the optical fiber clamped clamping element.

3. The mechanism according to claim 2, in which the pulling force applied to the optical fiber clamping element or each clamping element, is applied by application of torque to push the element.

4. The mechanism according to any one of claims 1 to 3, wherein the locking elements include a pair of opposite clamping elements capable of clamping the optical fiber by crushing the fibers between them.

5. The mechanism according to claim 1, in which the locking elements are displaced to take an open position in which the optical fiber, which should hold the clamping elements can be placed between the clamping elements until you are driven mechanism of splitting, after which the clamping elements clamp the fiber.

6. The mechanism according to claim 1, in which the clamping elements contain the opposite levers capable of angular movement about the axis of rotation, in principle, perpendicular to the longitudinal axis of the fiber, from the first position, where the anti-Christ. Apolonia the ends of the levers are separated to create a gap, able to place subject to splitting the optical fiber, the second position where the specified opposite ends closer together (closer than in the first position)to clamp and to create a tensile stress in an optical fiber placed in this gap during the cleaving of the fiber, and the levers are further capable of angular movement in the same direction beyond the second position to the third position where the opposite ends further apart (the second position), thereby pushing the split portion of the fiber.

7. The mechanism according to claim 6, in which the actuating mechanism for splitting also provides angular movement of the levers.

8. The mechanism according to claim 1, additionally containing a sink for wastes that can accommodate pushed the broken away part of the optical fiber of the clamping element.

9. The mechanism according to claim 1 in which the means for splitting the fiber contains a blade.

10. The mechanism according to claim 9, in which the blade is narezushi blade, able to cut the optical fiber.

11. The mechanism according to claim 1, included together with the mechanism for splicing fibers in a device for splicing optical fibers.



 

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3 cl, 4 dwg

FIELD: physics.

SUBSTANCE: apparatus has two collimating units which can turn relative each other around an axis of rotation, and one optical element which compensates for rotation. A first power splitter receives input signals and splits said signals into at least two signals for transmission over at least two optical channels through the collimating units and the optical element compensating for rotation. After passing through the second collimating unit, the signals are combined into one signal in a second power splitter. A version of the apparatus has an optical attenuator which is connected to one component from the first collimating unit, the second collimating unit and the optical element compensating for rotation, or a gear which rotates the optical attenuator. In one of the versions, the attenuator is controlled by a controller.

EFFECT: minimisation of change in attenuation in a rotary joint during rotation, as well as provision for transmission of analogue optical signals which carry information encoded in the amplitude or level of the signal.

17 cl, 9 dwg

FIELD: physics.

SUBSTANCE: thermal detector has an illuminating and a receiving light guide, the first ends of which are connected to a light source and a photodetector, and second ends to a guided Y fibre-optic splitter, the common input/output of which is fitted with a heat-sensitive element, having a mirror surface and made in form of an opaque blind made from material with shape memory effect, attached by one end to the butt-end of a measuring light guide. The blind is given reversible shape memory at flexure. In the initial state, below the direct martensitic transformation temperature, the free end of the blind is tightly pressed by the mirror side to the butt-end of the measuring light guide, thereby completely covering the aperture of the light guide. In a state higher than the inverse martensitic transformation temperature, the free end of the blind deviates by an acute angle from the plane of the butt-end of the measuring light guide.

EFFECT: faster operation owing to reduction of the size and weight of the heat-sensitive element, simplification, reduced loss when transmitting reflected light flux to the receiving light guide and high sensitivity owing to significant change in intensity for small temperature changes.

5 dwg

FIELD: physics.

SUBSTANCE: photopolymerisable composition contains a polymerisable component, e.g., a monomer or mixture of monomers, ortho-quinones and a reducing agent, e.g., an amine, with the following ratio of components, pts.wt: polymerisable component 100, ortho-quinones 0.005-0.1, reducing agent 0.5-10.0, for connecting light guides. The invention also relates to a method and a device for connecting light guides using said composition.

EFFECT: use of the present invention simplifies, speeds up and reduces the cost of connecting light guides, and enables to achieve higher quality.

11 cl, 1 ex, 2 dwg

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