JP2014044347A - Method of manufacturing infra-red image bundle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of extremely easily and uniformly bonding closely arranged fiber or laminated tape-like fiber with each other in a method of manufacturing an infra-red image bundle that forms longitudinal and horizontal arrays by laminating tape-like fiber in multi-stages.SOLUTION: Pixel fiber is coated by thermoplastic resin or resin that is soluble in organic solvent. Fiber or tape-like fiber is bonded with each other by making coated resin subjected to heating melting or solved by a solvent under the state of being closely attached with each other.

Description

  The present invention relates to a method of manufacturing an image bundle having optical fibers as pixels, and in particular, a vertical and horizontal array is formed by laminating a plurality of tape-like fibers in which a number of optical fibers equal to the number of horizontal arrays are aligned in a row. The present invention relates to a method for manufacturing an infrared image bundle.

  An image bundle in which pixel fibers at both ends are aligned is useful for image transmission, and various manufacturing methods have been proposed. In particular, the development of an infrared image bundle that uses a fiber with good infrared transmission characteristics, such as a fluoride fiber and a chalcogenide fiber, as a pixel is suitable for transmission of infrared images and thermal images. Manufacture is difficult because it is easily damaged during the process, and water resistance is poor and water cannot be used in the manufacturing process.

  Patent Documents 1 and 2 disclose a method for manufacturing an image bundle and a jig to be used that are aligned so as to be linearly aligned in both the vertical direction and the horizontal direction.

  Patent Document 3 discloses a method for producing an infrared image bundle by an elution method.

Patent Document 4 discloses a method for manufacturing an infrared image bundle in which tape-shaped fibers are laminated.

Japanese Patent Laid-Open No. 10-251037 Japanese Patent Laid-Open No. 10-239536 Japanese Patent Laid-Open No. 10-251037 Japanese Patent Application No. 2011-226644

  However, in the image bundle manufacturing methods disclosed in Patent Documents 1 and 2, since the fiber from which the coating has been removed is pressed and fitted into the V-groove, the fiber is likely to be damaged by the V-groove and to be broken. In particular, in the case of an infrared fiber, since the material is soft, this manufacturing method significantly deteriorates the yield due to fiber strength deterioration and disconnection. In addition, since it is necessary to remove the coating for each fiber and arrange them in the V-groove, it takes a lot of time for manufacturing, and disconnection occurs when the coating is removed. In the manufacturing method disclosed in Patent Document 3, it is necessary to use a glass tube or a clad layer that should be finally dissolved and removed. However, in the case of a material having low water resistance, water cannot be used in the melting step. Therefore, it is difficult to apply this manufacturing method. In order to solve such a problem, the same inventors of the present application disclosed in Patent Document 4 that a fiber covered with a resin soluble in a solvent is formed into a tape shape, fibers in the vicinity of the end portions are brought into close contact with each other, and then laminated. A manufacturing method for creating vertical and horizontal arrays is disclosed. In this manufacturing method, a process of adhering and fixing fibers that are closely contacted and aligned in parallel and a process of laminating adhesive fixing parts in multiple stages and adhering to each other are indispensable, but details of the adhering method are not disclosed.

  The present invention has been made in view of the above. The purpose of the present invention is to produce an infrared image bundle in which vertical and horizontal arrays are formed by laminating tape-like fibers and bonding them to each other. Alternatively, it is an object of the present invention to provide a method for bonding laminated tape-like fibers very simply and uniformly.

  In a method of manufacturing an infrared image bundle by aligning both ends of a large number of fibers, an infrared fiber coated with a thermoplastic resin or a resin soluble in an organic solvent has a required fiber length of one turn. The number of turns equal to the number of arrangement in the horizontal direction of the image bundle is wound around the drum, and the infrared fibers are temporarily fixed while holding the wound arrangement, and then the fiber temporary fixing portion is divided to divide the fibers at both ends. And a step of producing a tightly bonded portion in which the fibers in the vicinity of both ends of the tape-shaped fiber are brought into close contact with each other by the adhesive force of the coating resin.

In addition, the method includes a step of laminating the number of close contact adhesive portions in the bundle vertical direction after the step of producing the close contact adhesive portions, and bonding the close contact adhesive portions to each other by the adhesive force of the coating resin. .

  In addition, the bonding step of the tight adhesion portion is a step of bonding the fibers by heating and melting the coating resin.

In addition, the bonding step of the close contact bonding portion is a step of bonding the fibers by dissolving the coating resin with a solvent.

In addition, the step of producing the tight adhesion portion is performed by fitting the tape-like fiber into a U-shaped jig having a width of the tight adhesion tape portion.

Further, the step of adhering the tight adhesion portions by the adhesive force of the coating resin is a step of heating and melting the coating resin to bond them.

Further, the step of adhering the tight adhesion portions by the adhesive force of the coating resin is a step of dissolving the coating resin with an organic solvent and bonding them.

Further, the step of laminating the adhesive adhesion portions of the number of arrangement in the bundle vertical direction and bonding the adhesion adhesive portions to each other by the adhesive force of the coating resin is applied to the U-shaped jig having the width of the adhesion adhesive portion. It is characterized in that it is carried out by fitting the tight adhesion part.

  According to the present invention, in the manufacture of an infrared image bundle in which tape-like fibers are laminated in multiple stages to form a vertical and horizontal arrangement, the fibers that are closely aligned or the adhesive bonding portions that are laminated in multiple stages can be bonded extremely simply and uniformly. Thus, it is possible to manufacture in a short time and at a low cost.

It is a figure for demonstrating the manufacturing method of a tape-shaped fiber. It is the figure which looked at the tape-like fiber from the top. It is a cutaway view of a tape-like fiber temporary fixing part. It is a figure for demonstrating the method of sticking the both ends vicinity of a tape-shaped fiber. It is a cutaway view of a tape-shaped fiber loaded in a U-shaped jig. It is a figure for demonstrating the method of performing the adhesion | attachment of the fibers loaded in the U-shaped jig | tool by heat-melting coating resin. It is the figure which looked at the tape-like fiber which adhered the edge part from the top. It is a figure which shows the end surface of the tape-shaped fiber which adhere | attached the edge part closely. It is a figure for demonstrating the method of performing the adhesion | attachment of the fibers loaded in the U-shaped jig | tool by the solvent melt | dissolution of coating resin. It is a figure for demonstrating the method of carrying out the lamination | stacking adhesion | attachment of the close_contact | adherence adhesion part in multiple stages. It is a figure which shows an infrared image bundle end surface.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The manufacturing method of this example is as follows. Step-1: Preparation of an infrared fiber coated with a thermoplastic resin or an organic solvent-soluble resin, Step-2: Preparation of a tape-like fiber corresponding to the fiber arrangement at both ends, Step-3: Adhering and aligning the ends of the tape-like fiber, and bonding and fixing, Step-4: Laminating and adhering the closely aligned ends, and Step-5: Sleeving and polishing. Hereinafter, details of the five steps will be sequentially described.

  First, step-1 will be described.

At present, almost all ultraviolet curable urethane acrylate resins are used as coating materials for optical fibers. Since this resin is three-dimensionally crosslinked, it is not softened by heating and does not dissolve in an organic solvent. On the other hand, the coating resin 21 of this embodiment is made thermoplastic by using a chain polymer that is not three-dimensionally crosslinked. Moreover, it can also make it soluble in the organic solvent with a component. The purpose of making the coating resin thermoplastic is to use the coating resin as a hot-melt adhesive in a later manufacturing process. The purpose of making it soluble in an organic solvent is to use the coating resin as a solvent-type adhesive in a later manufacturing process. Soluble in an organic solvent is a resin that is soluble in any solvent such as isopropyl alcohol, acetone, dichloromethane, 1,3-dioxolane, ethylene glycol dimethyl ether, methyl ethyl ketone, N-methyl-2-pyrrolidone, This can be realized with a resin mainly composed of acrylic. In order to coat such a resin with a fiber, an ultraviolet curable resin is desirable, but an ultraviolet curable resin can be obtained by adding a photoinitiator.

In the present embodiment, the resin coating is performed by using a coating cup and an ultraviolet irradiation device at the time of drawing an optical fiber in the same manner as a normal coating material. The optical fiber has a good infrared transmission characteristic such as a fluoride fiber mainly composed of a fluorine compound such as ZrF4, InF3, AlF3 or a chalcogenide fiber mainly composed of a chalcogenide such as arsenic sulfide or arsenic selenide. Use infrared fiber. With respect to the coating thickness, the thinner the fiber, the more advantageous it is that the fibers can be arranged at a high density.

  Next, process-2 is demonstrated based on FIG. 1, FIG. In the following description, an infrared fiber cut to a required length for an infrared image bundle is referred to as a pixel fiber.

FIG. 1 is a view showing an infrared fiber 2 wound around a drum 1, and the infrared fiber 2 is coated with the resin of this embodiment. The outer periphery of the drum 1 has the length of the pixel fiber required for one turn, and the infrared fiber 2 is divided and wound by the same number of turns as the arrangement number in the horizontal direction of the image bundle. Winding the infrared fiber 2 around the drum 1 may be performed at the time of drawing the fiber, or may be rewound into the above-described form after drawing. The infrared fiber 2 that is divided into the drum 1 and wound is temporarily fixed with an adhesive, an adhesive tape, or the like. At least one temporary fixing portion may be provided, but it is desirable to make at least three temporary fixing portions 3, 3-1, 3-2 in order to hold the arrangement of the infrared fibers 2 firmly. In order to prevent the infrared fiber 2 from adhering to the drum 1, the surface of the drum 1 may be made of a fluororesin. By cutting the central temporary fixing part 3 with a knife or the like, a tape-like fiber 4 having the same number and length as shown in FIG. 2 and the same arrangement at both ends can be obtained. FIG. 3 shows a cut surface of the tape-like fiber 4 temporarily fixed with the adhesive tape 5. Since it is difficult to wind the infrared fiber 2 in close contact with the drum 1, there is usually a gap between the fibers of the tape-like fiber 4.

Next, step-3 will be described with reference to FIGS.

FIG. 4 shows a method for closely aligning both ends of the tape-like fiber 4 using a U-shaped jig 6. The groove width when the pixel fiber 20 is in close contact with the pixel fiber 20 between the temporarily fixed portion 3 and the temporarily fixed portion 3-1 of the tape-like fiber 4 or between the temporarily fixed portion 3 and the temporarily fixed portion 3-2. Is fitted into the groove of the U-shaped jig 6 having Since the arrangement of the pixel fibers 20 is fixed by the temporary fixing portions 3, 3-1, 3-2, as shown in the cutaway view of FIG. The coatings 21 can be brought into close contact with each other and aligned in a row.

Next, a first method for bonding and fixing the pixel fibers 20 aligned in the groove of the U-shaped jig 6 will be described. The coating resin 21 is thermoplastic. As shown in FIG. 6, a weight 8 is placed on the aligned pixel fibers 20 and heated using a heating furnace 7. In this way, since the coating resin 21 is thermoplastic, the coating resin 21 of each fiber is overlapped and deformed by the force of 8 to be fused and integrated, and the pixel fibers 20 are bonded to each other by the adhesive force of the coating resin 21. Can be fixed. That is, in this embodiment, by using the coating resin 21 as a hot melt adhesive, time-consuming coating removal work and adhesive application work are unnecessary, so that the fiber bonding work is greatly simplified. As a result, manufacturing time and manufacturing cost can be greatly reduced. In addition, it is difficult to uniformly apply the adhesive, but the fiber coating material is very uniformly coated, so that uniform bonding without thickness unevenness is possible. If the front end portion to which the coating resin 21 is not fused is cut, the coating is performed in a state where the end portions of the pixel fibers 20 are aligned in a one-dimensional manner as shown in the top view of FIG. 7 and the end surface of FIG. It is possible to obtain the tight adhesion portion 13 that is adhered and fixed by the resin 21.

  Next, a second method for bonding and fixing the pixel fibers 20 aligned in the groove of the U-shaped jig 6 will be described. The coating resin 21 is soluble in an organic solvent. As shown in FIG. 9, the organic solvent 10 that dissolves the coating resin 21 is injected into the gap between the pixel fibers 20, and then a weight 8 is placed thereon. In this way, the coating resins 21 are melted and integrated with each other with the pixel fibers 21 aligned by the force of the weight 8. That is, in this embodiment, by using the coating resin 21 as a solvent-type adhesive, the time-consuming coating removal operation and the adhesive application operation are unnecessary, so that the fiber bonding operation is greatly simplified. As a result, manufacturing time and manufacturing cost can be greatly reduced. If the organic solvent 10 is volatilized and then taken out from the U-shape, and the tip portion where the coating resin 21 is not fused is cut, a close adhesion portion 13 as shown in FIGS. 7 and 8 can be obtained.

  Next, step-4 will be described.

The adhesive bonding portions 13 are stacked in the U-shaped jig 6 having the same width as the adhesive bonding portion 13 shown in FIG. And heat. In this way, the coating resins 21 of the tight adhesion portion 13 are fused and integrated, and the pixel fibers 20 can be two-dimensionally aligned. That is, also in this case, by using the coating resin 21 as a hot-melt adhesive, the end portions of the pixel fibers arranged vertically and horizontally can be easily manufactured in a short time.

Of course, it is also possible to laminate and integrate the coating resin 21 as a solvent-type adhesive. In this case, the adhesive bonding portions 13 are stacked in the U-shaped jig 6 by the number of vertical arrangements of the infrared image bundles, the organic solvent 10 for dissolving the coating resin 21 is injected, and the weight 8 is placed thereon. If the organic solvent 10 is volatilized and then taken out from the U-shaped mold 6 and the tip portion where the coating resin 21 is not welded is cut, the end portions of the pixel fibers arranged vertically and horizontally can be obtained.

Next, step-5 will be described with reference to FIG.

  The pixel fibers arranged vertically and horizontally are loaded into a sleeve 11 shown in FIG. 11, fixed to each other with a fixing resin 12, and then polished to form an infrared image bundle.

According to the manufacturing method of this embodiment, in the infrared image bundle manufacturing method in which tape-like fibers are laminated in multiple stages to form a vertical and horizontal arrangement, the fibers can be bonded together or the laminated tapes can be bonded together very simply and uniformly. Therefore, it is possible to manufacture at a low cost for a short time.

  Although the invention has been described with reference to specific embodiments, various modifications may be made to the above-described embodiments without departing from the scope of the invention as defined in the claims. Such changes and modifications are also within the technical scope of the present invention.

  The present invention can be used for applications such as temperature distribution measurement and infrared image measurement.

1: Drum 2: Infrared fibers 3, 3-1, 3-2: Temporary fixing part 4: Tape-like fiber 5: Adhesive tape 6: U-shaped jig 7: Heating furnace 8: Weight 10: Organic solvent 11 : Sleeve 12: Fixing resin 13: Adhesion adhesion part 20: Pixel fiber 21: Coating resin

Claims (8)

  In the method of manufacturing an infrared image bundle by arranging and arranging both ends of a large number of fibers, an infrared fiber (2) coated with a thermoplastic resin or a resin soluble in an organic solvent has a required fiber length of one turn. Is wound around the drum (1) having a length equal to the number of turns in the horizontal direction of the image bundle, and the infrared fibers (2) are temporarily fixed while holding the wound array, and then the fiber is temporarily fixed. The step of dividing the portion (3) to obtain a tape-like fiber (4) corresponding to the fiber arrangement at both ends, the fibers in the vicinity of both ends of the tape-like fiber (4) are brought into close contact, and the adhesive strength of the coating resin (21) The manufacturing method of the close_contact | adherence adhesion part (13) which adhere | attaches fibers by this, The manufacturing method of the infrared image bundle characterized by the above-mentioned.   After the manufacturing process of the adhesion bonding part (13), the adhesion adhesion parts (13) of the number of arrangement in the bundle vertical direction are stacked, and the adhesion adhesion parts (13) are bonded to each other by the adhesive force of the coating resin (21). And a process for producing an infrared image bundle.   2. The infrared image bundle manufacturing method according to claim 1, wherein the bonding step of the close contact bonding portion (13) is a step of bonding the fibers by heating and melting the coating resin. 3. Manufacturing method. 2. The infrared image bundle manufacturing method according to claim 1, wherein the bonding step of the close contact bonding portion (13) is a step of bonding the fibers by dissolving the coating resin with a solvent. 3. Bundle manufacturing method. In the manufacturing method of the infrared image bundle of Claim 1, the manufacturing process of the said contact | adherence adhesion part (13) is made into the said tape-shaped fiber (6) which has the width | variety of the said adhesion adhesion part (13), and the said tape-like fiber (6). 4) A method for producing an infrared image bundle, which is performed by fitting. The manufacturing method of the infrared image bundle of Claim 2 WHEREIN: The process of adhere | attaching the said adhesion adhesion part (13) with the adhesive force of the said coating resin (21) heat-melts the said coating resin (21), and adhere | attaches it. A method for producing an infrared image bundle, wherein: 3. The method of manufacturing an infrared image bundle according to claim 2, wherein the step of adhering the tight adhesion portions (13) to each other by the adhesive force of the coating resin (21) dissolves the coating resin (21) with an organic solvent (10). A method for producing an infrared image bundle, wherein the method is a step of adhering to each other. In the manufacturing method of the infrared image bundle of Claim 2, the said adhesion adhesion part (13) of the number of arrangement | sequences of bundle vertical direction is laminated | stacked, and the said adhesion adhesion part (13) is mutually bonded by the adhesive force of the said coating resin (21). The method of manufacturing an infrared image bundle, wherein the bonding step is performed by fitting the close contact bonding portion (13) into a U-shaped jig (6) having a width of the close contact bonding portion (13). .

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