RU2199140C2 - Technology forming regular hexagonal fiber structure - Google Patents

Abstract

FIELD: manufacture of flexible regular assemblies of fibers, monochromic and polychromic fiber-optical plates and microchannels boards. SUBSTANCE: stack of hexagonal cross-section is assembled from unitary glass rods comprising core and one or several sheaths. Centers of rods form regular hexagonal lattice. Stack is heated and constricted into multicore rods geometrically similar to it. Multicore rods for articles which do not require high resolution are based in rows on horizontal plane, assembled in block of required section and vitrified under pressure. Multicore rods for articles which require high resolution are laid in stack in same manner as single-core rods, are subjected to repeat constriction into supermulticore rods which are then assembled in stack and vitrified in same manner as multicore rods. First primary system of assembly is used to form stack of regular hexagonal section, then it is so changed that one outer row of constituting rods is absent on one or three adjacent or five sides of hexagon and assembly of multicore and supermulticore rods is so accomplished that number of elements in any outer row of one rod differs from number of elements in outer row of adjacent rod bordering on it. EFFECT: high quality of transmission and image transformation. 6 cl, 6 dwg

Description

 The invention relates to a technology for producing fiber structures: flexible regular fiber bundles (GRG), monochronous and polychrome fiber optic plates (FOP), as well as microchannel plates (MCP), with different degrees of resolution, used in optical and electron-optical systems for image transfer and transformation.

 Depending on the type and functional purpose, fiber products consist of a variety of cores or channels, the sizes of which lie in the range from 8-15 microns for GDF to 4-10 microns in GP and MCP, and their number ranges from several thousand in GDF to several millions in GPs and MCPs of medium sizes (20-60 mm), reaching tens of millions in larger plates (70-130 mm).

 For high-quality image transmission, the whole set of fibers must be tightly packed in a certain order, while the location of all fibers at the input and output ends of the part must be the same, i.e. structure should be regular. Of the two possible types of structures: square and hexagonal - the latter is most widespread, because it provides the densest packing of round and regular hexagonal fibers and is more technologically advanced. The hexagonal structure is characterized by the fact that the lines connecting the centers of any three neighboring fibers, each of which borders with the other two and occupies a peak-cavity position with respect to them, form a regular triangle.

 The most important task in the manufacture of the above products is the assembly of many fibers with specified sizes into the correct hexagonal structure of the required size and its fixation, for example, by sintering. This is one of the main problems, the solution of which is aimed at the efforts of specialists in this field of technology. Directly regular laying of millions of single fibers of such small sizes is an almost insoluble task. Therefore, a multistage method of forming a fiber structure is generally accepted. In the first stage, single rods are pulled from a melt from a kit consisting of a staff and one or more tubes, or from a multi-chamber vessel from a melt. Then these rods are placed in a bag having a regular hexagon in cross section and pulled into multi-core rods (MLS), which, in turn, are again placed in a bag of regular hexagonal shape and pulled into super-core rods (SMSS). If necessary, this process can be continued. At the final stage, rods are obtained in which single fibers have the size necessary to provide a given resolution, and the number of single fibers in them can reach several thousand.

 The main advantage of the method is that the dimensions of the rods obtained at each stage are large enough, which greatly simplifies the assembly process. However, the structure obtained by the multi-stage process of products has a number of significant drawbacks, which will be examined in detail in the analysis of the prototype.

From the analysis of the prior art, various methods for forming a hexagonal structure are known, including those that aim to eliminate the disadvantages of the multi-stage process described above. The problem of increasing the ordering of the hexagonal structure of GPs and MCPs is being intensely dealt with by specialists from Galileo Elektro - Optics Corp (USA). In the article "New fiber optic faceplate architectures" (L. Cook, D. Mancini, S. Patterson), published: 196 / SPIE Vol. 1243 Elektron image Tubes and Image-In-tensifiers (1990) , on the basis of a certain theoretical analysis, showed the possibility of multi-stage assembly from a seven-core MZhS and other MZhS, the number of fibers of which are degrees seven: 7 ² = 49, 7 ³ = 343, etc. The assembly of these types from MZHS and SMZh allows to form a perfect hexagonal structure , in which any fiber occupies a peak-trough position relative to a pair of adjacent fibers, while including at the border assemblies.

The authors of this article attempted to patent this method (US Patent Application 371065, June 6, 1989), but no decision was made on it. Another method proposed by the same authors was patented (US patent 5049176, С 03 В 23/207, publ. 09/17/91, abstract in the Bulletin "ISM" 5 (issue 39), 1993). In the same patent, the above-mentioned process of forming a hexagonal structure from 7 ⁿ -core MJs is described in detail. The main content of the patent is the description of the protected method of forming the hexagonal structure from the MZH special forms. The essence of the method lies in the fact that initially the package is assembled with a cross section in the form of a regular hexagon or triangle, from all the outer rows of which a given number of unit rods is removed in a certain order, and the rest is pulled into the MZHS.

 Despite the fact that the proposed methods allow to obtain a fairly perfect hexagonal structure ("Fractal multifiber microchannel Plates", L. Cook and co-authors), 190 / SPIE, Vol. 1655, Electron Tubes and image intensifibers / 1992), they have significant disadvantages. Firstly, the proposed shapes (with the exception of the figure obtained from the triangle) do not allow assembly on a horizontal plane. Secondly, most of them lack border smoothness, which greatly complicates the retention of the complex configuration of the extreme rows during the drawing process. Thirdly, the proposed forms are extremely unstable, because after removal of the rods, the inherent property of connectivity is lost in the hexagonal packing.

 For the prototype of the proposed new method of forming a regular hexagonal fiber structure adopted "Method of forming a honeycomb structure", protected in US patent 3679384, C 03 C 25/02, publ. 07/25/1972, This patent describes a classical method of forming a hexagonal structure from rods laid in a regular hexagonal packet shape, constricting the packet in an MSS, and then in the SMSS, which are used for the manufacture of GPs and MCPs.

 With the obvious advantages of this method: firstly, of the possible cross-sectional shapes of the packets for obtaining a hexagonal structure (triangle, rhombus and hexagon), the latter is closest to the circle; secondly, sheer styling connectivity; thirdly, the simplicity of practical implementation - it has significant disadvantages. The hexagonal structure is achieved only inside the MZHS 2 (Fig. 1a), and when assembling the MZHS 2 on the horizontal plane 1, the extreme fibers occupy the peak-to-peak position, which leads to the formation of voids 3. The same situation occurs when assembling the SMSS 4 (Fig. .1b), but due to the fact that the relief of the boundary of the SMZhS 4 is much deeper than in the SMZh, the resulting voids 5 are more pronounced and larger. All this together leads to significant structural disruptions affecting not only its periodicity, but the shape and size of individual veins and channels, and to the formation of local shifts at the sintering boundaries of the SMF, the magnitude of which is several times greater than the period of the structure. All of the above leads to a deterioration in the information characteristics of the products and to the formation of a fixed noise in the image transmitted by them.

 The objective of the present invention is to improve the quality of the image transmitted by fiber products (GRGV, VOP, and MCP), by reducing the defectiveness of the hexagonal structure at the stages of its formation from the primary (laying a package of single rods for drawing it into a multicore rod) to laying packets of MSS and SMZHS for drawing multicore rods of higher orders (super- and super-super-multicore) and assembling them into sintering blocks.

 Another objective of the present invention is the manufacture of regular polychrome (line and point) GPs.

 The tasks are solved by creating a perfect hexagonal structure due to a change in the shape of the assembly elements: MZHS and SMZHS-, and their subsequent assembly in a certain order.

 To solve the problem, a method for forming a regular hexagonal fiber structure is proposed, which consists in collecting a hexagonal cross-sectional packet from single glass rods consisting of a core and one or several shells to form a regular hexagonal lattice from the centers of the rods, which is heated and pulled into geometrically similar to it MZHS, the latter for products that do not require high resolution, in order, based on a horizontal plane, assembled in the block of the desired cross section Nia and sintered under pressure, and for products with a high resolution is placed in the package in the same way as the single rods and subjected to repeated pulling in SMZHS which are then collected in a block and sintered in the same way that the rods or stranded; at the same time, packages of single rods and MZHs are given a sectional shape obtained by changing the assembly diagram of a package of a regular hexagonal sectional shape so that on one, or three adjacent, or five sides of a regular hexagon there is no one outer row of constituent rods, and the assembly of the MZHS and SMZhS carry out in such a way that the number of elements in any outer row of one rod differs by one from the number of elements of the outer row of the adjacent rod adjacent to it.

 The assembly of the MZHS and SMZhS, in which there is no outer row of elements on one side of the hexagon in the cross section, is made by orderly oriented laying so that in any pair of adjacent rods located in the same row, the largest face of one hexagon is adjacent to the face opposite to it, another hexagon.

 MZHS and SMZHS, in which there are no outer rows of elements in the cross section on three adjacent sides of the hexagon, are assembled by orderly oriented laying so that in any pair of rods located in the same row, the large face of one hexagon is adjacent to the smaller face of the other hexagon.

 MZHS and SMZHS, in which there are no outer rows of elements in the cross section on the five sides of the hexagon, are assembled by orderly oriented laying so that in any pair of adjacent rods located in the same row, the smallest face of one hexagon is adjacent to the opposite face of the other hexagon.

 The proposed method can be successfully used in the manufacture of polychrome fiber structures. It should be borne in mind that, along with the problem of geometric regularity that exists for monochrome structures, a requirement arises for the quantitative equality of structural elements of all colors included in the assembly structure (a package of single rods of specified colors intended for drawing MZHS). This condition imposes a restriction on the choice of the order of the hexagon corresponding to the cross section of the packet, i.e. the number of single monochrome rods laid on the side of the initially regular hexagon. To do this, in order to obtain a linear regular three-color fiber structure, single rods having monochrome cores of three colors, for example, red, green and blue, are collected in a package in rows consisting of rods of the same color and alternating in a given sequence, for example, red, green, blue , red, etc., while the number of rods in the first row n for packages in which the outer row is absent on one or three adjacent sides is determined by the ratio n = 3a + 1, and for packages in which the outer row is absent em on five sides - the ratio n = 3a, where a is the number of the natural number; a = 1, 2, 3, ...

 For the assembly of a polychrome line structure with the number of colors K, the number of rods in the first row n for packages in which the outer row is absent on one or three adjacent sides is determined by the relation n = Ka + 1, and for packages in which the outer row is absent on five sides - by the relation n = Ka, where a is the number of the natural number: a = 1, 2, 3, ...

 To obtain a point regular three-color fiber structure, single rods having monochrome veins of three colors, for example red, green and blue, are collected in a packet in order, providing a given order of color alternation both within each row and relative to the rods of the previous row, while the shape of the section of the packet differs from the regular hexagon by the absence of one outer row of component rods on three adjacent sides, and the number of rods in the first row of the packet can be chosen arbitrarily, ay from three.

 The proposed method for constructing new simple forms of assembly elements (MFM and SMF) ensures the creation of an ordered hexagonal structure at all stages of the manufacturing process of FGR, VOP or MCP. Its main advantage is that, while solving the problem of forming a perfect hexagonal structure, it is as effective as an analogue (US patent 5049176, С 03 В 23/207, ISM 5-1993), devoid of all its shortcomings noted. Compared with the prototype, the proposed method eliminates its most important disadvantages, while maintaining all its advantages.

 The proposed method provides a perfect hexagonal structure both inside the assembly elements and at their borders when using MSS of any order. At the same time, the cross sections of the new assembly elements are optimal in shape, have smooth borders, are easy to manufacture, and the assembly of elements is laid on a horizontal plane for MFWs of any order.

 Another advantage of the proposed method is that, along with providing high quality monochrome fiber products, it is possible to produce regular polychrome structures of various types. Products of this kind have no analogues both in domestic and (as far as we know) in world production. Regular polychrome structures cannot fundamentally be made by the methods claimed both in the analogue and in the prototype. The latter is due to the fact that the forms of MJ used in them do not possess quantitative color symmetry, the necessary condition of which for three-color structures is formulated as follows: the number of single fibers in the MJ should be a multiple of three. In support of the foregoing, we will carry out a simple quantitative comparison of the properties of the known forms of MHC with the proposed ones.

It is known that, if there are n unit rods on the packet side of a regular hexagonal cross-sectional shape, then their total number in the packet N is determined by the relation N = 3n (n-1) +1, which directly implies that N is not a multiple of three. Therefore, neither all regular hexagons of the prototype, nor 7 ⁿ -core MJS analogs are suitable for the assembly of polychrome structures. The same statement is true for all hexagons of the analogue obtained by removing the same number of unit rods on six faces, because the sum of the removed rods is a multiple of three and, therefore, the remaining number cannot be a multiple of three. An exception is the shape of the analogue, composed of triangles, but it could be suitable only for the assembly of a point colored structure.

In the proposed method, any form of MZHS satisfies the above condition. A packet with one missing row contains the total number of unit rods N _-1 = Nn = 3n (n-1) + 1-n = (n-1) (3n-1), i.e. N _{-1 is a} multiple of three when (n-1) is a multiple of three. A packet with missing rows on three adjacent sides contains N-s = Nn-2 (l-1) = 3 (n-1) ² , i.e. the condition of multiplicity three holds for any n. Similarly, it can be shown that the number of unit rods in a packet that does not have one row on five sides is N _-5 = (n-1) (3n-5), i.e. N _{-5 is a} multiple of three in the same way as N _{-1 is} at (n-1) a multiple of three.

 The method is illustrated by drawings, which depict the following.

 Figure 1 - fragments of assemblies on the horizontal plane MZHS (a) and SMZHS (b), made by the method prototype; 1 - horizontal plane, 2 - MZHS, 3 - voids between MZhS, 4 - SMZhS, 5 - voids between SMZhS.

 Figure 2 is a cross-sectional view of packages of single rods assembled according to a modified assembly diagram of a package of regular hexagonal cross-sectional shape, in which there is no one outer layer of constituent rods on one side (a), on three adjacent sides (b) and five sides (c) , and fragments of assemblies on the horizontal plane of the MZHS obtained from these packages: (d), (e) and (e), respectively; 6 - missing rows (shaded), 7 - the largest face of the MJS, 8 - the diagonal of the MJS parallel to the largest face, 9 - a layer of component rods added to the packet of the correct hexagonal section shape to obtain a shape similar to that which is formed in the absence of one outer row on five sides, 10 is the smallest facet of the MHS.

 FIG. 3 is a fragment of the assembly of SMGS made, as well as the components of their SMZH, from a bag with an outer row missing on one side, similar to that shown in Fig. 2a and differing only in the number of rods in the first row of the original bag: in Fig. 2a, four, figure 3 - three; 11 - MZHS, 12 - SMZhS.

 FIG. 4 is a fragment of the assembly of SMGS made, as well as the components of their SMZH, from a package with missing outer rows on three adjacent sides, similar to that shown in Fig.2b and differing only in the number of rods in the first row of the original package: in Fig.2b - four , figure 4 is three; 13 - MZHS, 14 - SMZhS.

 FIG. 5 is a cross-sectional view of a package of unit rods assembled according to an altered assembly pattern of a package of regular hexagonal cross section, which does not have one outer row of rods on one side (similar to that shown in FIG. 2 a) for manufacturing a three-color line structure (a) and fragment assembly MZHS obtained from this package (b); the letters "K", "3" and "C" indicate the rods of red, green and blue, respectively.

 6 is a cross-sectional view of a package of unit rods assembled according to an altered assembly pattern of a package of regular hexagonal cross section, which does not have one outer row of assembly rods on three adjacent sides, intended for the manufacture of a three-color dot structure (a) and a fragment of an assembly of MSS obtained from this package (b); the letters "K", "3" and "C" indicate the rods of red, green and blue, respectively.

 All illustration material is made on a hexagonal grid at the disposal of the authors formed by regular hexagons. In all the examples below, the sectional shape of the unit rods is a circle, i.e. considered fiber products have a hexagonal structure consisting of round fibers. This discrepancy is not critical and in no way can question the applicability of the results for specific fiber products. Both structures are identical, which can simply be detected if each regular hexagon of the grid in the drawings is mentally replaced by a circle inscribed in it.

 Consider a specific example of manufacturing a monochrome VOP. At the first stage, a package of single glass cylindrical rods made of a serial combination of glasses is assembled: a core of TBF-10, a reflective sheath of VO-50, a light-absorbing sheath of WTO-73. Rods with a diameter of 1.7 mm are assembled into clamps of a regular hexagonal cross-sectional shape, the height of which is 2H = 25.4 mm. With such ratios of sizes of clamps and single rods, their number in the first row is n = 9. 208 rods are successively stacked in 16 rows, which corresponds to the absence of one row 6 in the packet of the correct hexagonal section (Fig. 2a) (the number of rows of the packet of the correct hexagonal shape is P = 2n-1, i.e., for n = 9 P = 17). Then the bag is clamped like a regular bag of regular hexagonal shape, putting instead of the missing row a gasket equal to its height.

The assembled bag is placed in an oven, heated and dragged into the MZHS, the minimum section height of which is 2h _min = 1.8 mm. 161 MZHs are placed in a package similar to a package of single rods (without one row), but in this case, 8 MZHs are placed in the first row, and the number of rows is 14. Assembling is performed in a special clamp in order, laying each MZH of the first row on the horizontal plane 1 of the clamp base so that its largest face 7 is located vertically and always occupies the same position (left or right) relative to the parallel to this face of the diagonal of the cross section of the MZHS 8 (Fig.2d). Each subsequent row of MZHS is laid in a comb formed by MZHS of the previous row, in the same orientation as the MZH of the first row.

The assembled bag is placed in an oven, heated and pulled into an SMZhS, the minimum section height of which is 2h _min = 1.05 mm. Each SMZhS contains 33488 single veins, and the diameter of each vein is 5 microns. Then SMZHS 12 is collected in a block in the same manner as when assembling the package MZHS (figure 3). When sintering in press furnaces, SMZhS are placed in a rectangular or square section mold. The size of the block should provide the ability to obtain the required dimensions from it.

 Consider a specific example of the manufacture of GRGV. At the first stage, a package of single glass cylindrical rods is assembled, the core of which is made of BC-92 glass, the reflective shell is made of C-52 glass, and the second soluble shell is made of C-78-5 glass. The diameter of the rods is 1.64 mm. The package is assembled into clamps of the correct hexagonal cross-sectional shape, the height of which is 2H = 18.75 mm. With such ratios of sizes of clamps and rods, their number in the first row is n = 7. In this example, the shape of the package is used, corresponding to the absence of one outer row of assembly rods on five sides (Fig.2c). It is easy to see that this form corresponds to adding to the regular hexagon with the number of rods in the first row n and the number of rows P = 2n-1 another row containing n-1 rod. Therefore, 133 rods in 14 rows fit into the package. After assembly, the package is fixed, for which the clamping bar is raised to the height of the added row.

Next, the package is pulled into the MZHS, the maximum section height of which is 2h _max = 1.2 mm. The subsequent assembly of the MZHS is the same as in the first example, but with two differences. Firstly, the orientation of the MFW in the first row and all subsequent rows is controlled by the position of the smallest face 10 (Fig. 2e). Secondly, since the constriction of the GRGV package is completed by the constriction of the package of the MFZ, the assembled package is shaped like a dodecagon, i.e. the shape closest to the circle. The number of MSS in the package and the size of the SMZH pulled from them is determined by the required dimensions of the bundle and its resolution.

 Consider a specific example of manufacturing a manual gearbox. At the first stage, a package of single glass cylindrical rods made of serial combinations of glasses is assembled: a core of C-78-5, a shell of 6Ba4. Rods with a diameter of 2.2 mm are assembled into a clamp with a regular hexagonal cross-sectional shape, the height of which is 2H = 25.4 mm. With such ratios of sizes of clamps and single rods, their number in the first row is n = 7. Laying 108 rods, which corresponds to the absence of one row on three adjacent sides of the packet of the correct form (figb), are in the following order. The first six rows are laid in the same way as when assembling a regular package, and starting from the seventh row, the number of stacked rods is reduced by one on each side of the row. After assembling all 12 rows, the package is fixed.

 The assembled bag is placed in an oven, heated and dragged into the MZHS, the cross-sectional height of which in any of the three directions is 2h = 2.1 mm. 108 MZHS are placed in a package similar to a package of single rods (without one row on three adjacent sides). The package is assembled in a special clamp in order, laying each MZH of the first row on the horizontal plane 1 of the base of the clamp so that its large face is vertical and always occupies the same position (on the left or right side of the section of the MZH) (Fig.2d). Each subsequent row of MZHS is laid in a comb formed by MZHS of the previous row, in the same orientation as the MZH of the first row.

 The assembled bag is placed in an oven, heated and pulled into an SMZhS, the cross-sectional height of which in any of the three directions is 2h = 0.72 mm. Each SMZhS contains 11664 single channels, the diameter of each channel is ~ 6 μm, and the step of the structure is ~ 7.5 μm. Then SMZHS 14 is collected in a block in the same manner as when assembling the package MZHS (figure 4). To get the figure closest to the circle, the SMGS block is shaped like a dodecagon. The assembled unit is placed in a monolithic glass flask, heated and sintered in an isostatic pressing unit.

 Consider a specific example of manufacturing a GP with a linear tricolor regular structure. At the first stage, single rods are made from a kit consisting of a staff and two tubes. The racks are made of special glasses with the required optical characteristics, painted with various additives in red, blue and green. The inner tube is made of colorless glass for a BO-type reflective sheath, and the outer one is made of dark glass for a WTO-type light-absorbing sheath.

 To assemble the package, clips of the correct cross-sectional shape with a height of 2H = 30 mm were selected. Since the number of rods stacked in the first row obeys the condition n = 3a + 1, taking a = 8, we have n = 25. Hence, the diameter of a single rod is 0.70 mm.

 The assembly of a package of single rods is carried out in order, observing the specified order of colors: red, green, blue. The shape of the package corresponds to a regular hexagon without one row (figa). Having laid 48 rows in a given sequence (16 colored triads), the package is clamped by laying a gasket in the height of one missing row.

The package is placed in an oven, heated and pulled into the MZHS, the minimum height of which is 2h _min = 0.89 mm. Then the MZHS is cut to the length of the mold (~ 60 mm) and assembled into a block, observing the order of alternating colors (as shown in Fig. 56 for assembling the MSS with n = 4). Block section 40x40 mm. After assembly, the MZhS block is sintered under pressure.

 Consider a specific example of manufacturing a GP with a regular three-color dot structure. At the first stage, single rods are made in the same manner as in the previous example. The unit rods are assembled into clamps having the shape of a regular hexagon, while the dimensions of the unit rods and clamps are the same as in the previous example. The cross-sectional shape of the bag for a three-color dot structure corresponds to the correct one without one outer row on three adjacent sides. The package is assembled in the following order: first, 25 rods of the first row are laid, observing the given order of alternating colors, then the second row is laid so that the colors of its rods are consistent with the colors of the rods of the first row, etc. Thus, 24 rows are stacked. Then, starting from the 25th diagonal row, the number of rods stacked in each row is reduced by two - one on each side. Assembly is completed by laying the 48th row, after which the package is fixed and pulled.

 All further operations correspond to the previous example, except that the assembly of the MZHS in the block is carried out, focusing on the colors of the corner cores (Fig.6b).

 In the presented technology, in order to achieve the indicated technical result, the application of specific means and the introduction of new complex operations are not required. The invention allows to create a perfect hexagonal fiber structure without violating the traditional methods of assembling and drawing optical fibers, which can contribute to the widespread use of the new method in the claimed field of technology.

Claims (7)

 1. A method of forming a regular hexagonal fiber structure, which consists in collecting hexagonal cross-sectional packets from single glass rods consisting of a core and one or several shells to form a regular hexagonal lattice from the centers of the rods, which are heated and drawn into geometrically similar they have multicore rods, the latter for products that do not require high resolution, in order, based on a horizontal plane, assembled into blocks of the desired cross section and spec They are pressed under pressure, and for products with high resolution they are packed in bags in the same way as single rods and subjected to repeated pulling into super-multi-core rods, which are then assembled into blocks and sintered in the same way as multi-core rods, characterized in that packages of single and multicore rods are shaped into sections, obtained by changing the assembly diagram of the package of the correct hexagonal shape so that on one, or three adjacent, or five sides of the regular hexagon It exists on one outer row constituent rods, and the assembly of stranded and sverhmnogozhilnyh rods is performed such that the number of elements in the outer row of any one rod characterized by one of the number of elements of the adjoining outer row adjacent stud.  2. The method according to claim 1, characterized in that the multi-core and super-multi-core rods, in which in the cross section there is no outer row of elements on one side of the hexagon, are assembled by orderly oriented stacking so that in any pair of adjacent rods located in one row, the largest face of one hexagon adjoins the face opposite to it, the other hexagon.  3. The method according to claim 1, characterized in that the multi-core and super-multi-core rods, in which in the cross section there are no outer rows of elements on three adjacent sides of the hexagon, are assembled by orderly oriented stacking so that in any pair of adjacent rods located in one row, the large face of one hexagon is adjacent to the smaller face of the other hexagon.  4. The method according to claim 1, characterized in that the multi-core and super-multi-core rods, in which in the cross section there are no outer rows of elements on the five sides of the hexagon, are assembled by orderly oriented stacking so that in any pair of adjacent rods located in the same row , the smallest face of one hexagon adjoins the face opposite to it of the other hexagon.  5. The method according to claim 1, characterized in that, in order to obtain a linear regular three-color fiber structure, single rods having monochrome cores of three colors, for example, red, green and blue, are collected in a package in rows consisting of rods of the same color and alternating in a given sequence, for example, red, green, blue, red, etc., while the number of rods in the first row n for packets in which the outer row is absent on one or three adjacent sides is determined by the ratio n = 3a +1, and for a packet c, in which the outer rows are absent on five sides, by the ratio n = 3a, where a is the number of the natural row: a = 1, 2, 3, ....  6. The method according to p. 1 or 5, characterized in that for the assembly of a polychrome line structure with the number of colors k, the number of rods in the first row n for packages in which the outer row is absent on one or three adjacent sides is determined by the ratio n = ka + 1, and for packages in which the outer row is absent on five sides, by the ratio n = kа, where a is the number of the natural row: a = 1, 2, 3,., ..  7. The method according to claim 1 or 3, characterized in that, in order to obtain a point regular three-color structure, single rods having monochrome cores of three colors, for example, red, green, blue, are collected in a packet in order, providing a given order of alternating colors like inside each row. and relative to the rods of the previous row, while the shape of the cross section of the packet differs from the regular hexagon by the absence of one outer row of constituent rods on three adjacent sides, and the number of rods in the first row of the packet can be chosen arbitrarily, starting with three.

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