Uniform-light optical fiber bundle for projection and laser platemaking and preparation method of uniform-light optical fiber bundle

Abstract

The invention discloses a dodging optical fiber bundle for projection and laser platemaking and a preparation method thereof, and relates to the technical field of optical fiber bundle processing, the optical fiber bundle is composed of a conventional circular optical fiber structure and a polygonal optical fiber structure subjected to hot melting processing, the optical fiber bundle is composed of a plurality of single optical fibers, the front section and the rear section of each single optical fiber are respectively a round optical fiber body and a polygonal optical fiber body, the polygonal section of each polygonal optical fiber body is the same as the polygonal section of the rear section part, and the position and the length between the round optical fiber body and the front section part of the optical fiber bundle are correspondingly matched with the position and the length between the polygonal optical fiber body and the rear section part. A traditional dodging rod structure is replaced through a hot melting forming process, coupling loss between light beams is effectively reduced, and the dodging optical fiber bundle has the advantages of being simple in structure, easy to implement, capable of effectively improving light beam uniformity, suitable for optical systems such as laser projection, printing and display equipment and the like and wide in application prospect.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber technology, and in particular to a light-homogenizing optical fiber bundle for projection and laser platemaking and a preparation method thereof. Background Art

[0002] Fiber optic bundles are made by gluing the two ends of many single optical fibers together to form fiber optic components of different cross-sectional shapes and sizes. With the development of projection technology and laser platemaking technology, uniform and high-quality beam output has become an important factor affecting the quality of projection images and platemaking accuracy.

[0003] In the prior art, the homogenization of the light beam is usually achieved by introducing a homogenizing rod at the end of the optical fiber bundle. This solution has obvious limitations. The optical coupling efficiency between the optical fiber bundle and the homogenizing rod is low, resulting in a large amount of light energy being lost during the coupling process, which directly affects the light output efficiency and brightness of the system. Since the optical fiber bundle and the homogenizing rod need to be precisely aligned, mechanical errors are prone to occur during the installation process, thus affecting the uniformity of the light beam. At the same time, the assembly and adjustment of the homogenizing rod are complicated, which increases the production cost and maintenance difficulty. In the applications of projection and laser platemaking, even if a homogenizing rod is used, the light beam still has the problem of local uneven brightness, which affects the quality of the projected image and the accuracy of laser platemaking.

[0004] Therefore, we designed a uniform light fiber bundle for projection and laser platemaking and its preparation method to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art, such as low optical coupling efficiency of existing optical fiber bundles, large amount of light energy loss during coupling, easy occurrence of mechanical errors affecting beam uniformity, local uneven brightness problems, affecting the quality of projected images and the accuracy of laser platemaking, and propose a uniform light fiber bundle for projection and laser platemaking and its preparation method, aiming to solve the problems of uneven light output, large coupling loss and difficult installation of optical fiber bundles in the prior art. Although the traditional uniform light rod can achieve uniformity of optical fiber bundles to a certain extent, it has the disadvantages of large coupling loss, low beam filling efficiency and cumbersome installation process, which limits its application in high-performance optical systems, the quality of projected images and the accuracy of laser platemaking.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A method for making a uniform light optical fiber bundle for projection and laser plate making comprises the following steps: Step 1, the front section of the optical fiber bundle is processed into a circle, and the coating layer of the rear section of the optical fiber bundle is stripped to obtain a bare optical fiber section; Step 2, using a polygonal mold, whose inner cavity has a polygonal mold cross-sectional shape, placing the rear section of the optical fiber bundle with the coating stripped off in the polygonal mold, and ensuring that the outer surface of the rear section of the optical fiber bundle fits the inner cavity of the polygonal mold; Step 3, using a high-frequency induction heating device to heat the polygonal mold. During the hot melt molding process, the optical fiber bundle material gradually softens, and under the action of the polygonal mold, the rear section of the optical fiber bundle is shaped into a polygonal cross-sectional structure; Step 4: Connect the front section of the optical fiber bundle and the rear section of the optical fiber bundle by hot-melt smooth transition, and add a coating layer on the outer surface of the rear section of the optical fiber bundle.

[0007] Further preferably, the optical fiber bundle is made of any one of quartz, glass or plastic, and the softening temperature of the quartz optical fiber made of quartz material is 1700°C.

[0008] Further preferably, in step 1, the length of the coating layer stripped from the rear section of the optical fiber bundle is greater than 20 cm.

[0009] Further preferably, in step 2, the material of the polygonal mold used is tungsten steel, whose melting point temperature is greater than the melting point temperature of the optical fiber bundle material, the cavity cross-section inside the polygonal mold is any one of a hexagonal cross-section, a square cross-section or a triangular cross-section, and the length of the polygonal mold is greater than 20 cm.

[0010] Further preferably, in step 3, the high-frequency induction heating device provides a heating temperature of 1600°C-2000°C to the polygonal mold.

[0011] Further preferably, in step 3, during the hot melt molding process, a clamp is used to clamp and fix the optical fiber bundle and the polygonal mold, and the length of the clamp is not less than the length of the polygonal mold.

[0012] A light-homogenizing optical fiber bundle for projection and laser platemaking, wherein the front section of the optical fiber bundle is a circular optical fiber structure, and the rear section of the optical fiber bundle is processed into an optical fiber structure with a polygonal cross-section through hot-melt molding.

[0013] Further preferably, the optical fiber bundle is composed of multiple single optical fibers, the front and rear sections of the single optical fiber are respectively a circular optical fiber body and a polygonal optical fiber body, the polygonal cross-section of the polygonal optical fiber body is the same as the polygonal cross-section of the rear section, the position and length set between the circular optical fiber body and the front section of the optical fiber bundle, and the position and length set between the polygonal optical fiber body and the rear section correspond to each other.

[0014] Further preferably, the polygonal cross-section of the rear section and the polygonal optical fiber body is any one of a hexagonal cross-section, a square cross-section or a triangular cross-section, and the cross-section types selected for both are the same.

[0015] Further preferably, the optical fiber bundle is made of any one of quartz, glass or plastic.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention forms a polygonal structure at the rear section of the optical fiber bundle through hot-melt processing, reduces the coupling loss between the light beams, and thus improves the overall transmission efficiency of the light beam. The polygonal optical fiber structure design optimizes the filling factor of the light beam, achieves higher light beam uniformity, and ensures higher quality of output light during projection and laser platemaking. Compared with the traditional light homogenizing rod, the optical fiber bundle structure of the present invention is simpler, eliminating the dependence on the light homogenizing rod, thereby reducing the complexity of installation and improving the convenience of use. The circular cross-section at the front end of the optical fiber bundle and the polygonal cross-section at the rear end are connected by a smooth transition, which ensures the overall structural integrity of the optical fiber bundle and reduces potential light loss and output unevenness. The light homogenizing optical fiber bundle of the present invention can be widely used in various optical systems, such as laser projection, printing and display equipment, to meet the requirements of different application scenarios for light beam uniformity. By reducing light loss and improving light beam uniformity, the energy consumption of the system can be reduced, with better economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a light-homogenizing optical fiber bundle for projection and laser platemaking proposed by the present invention; Figure 2 This is a schematic diagram of the overall structure of a single optical fiber in a light-homogenizing optical fiber bundle for projection and laser platemaking proposed by the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the front section of a uniform light fiber bundle for projection and laser platemaking proposed by the present invention. Figure 4 The present invention provides a schematic diagram of the cross-sectional structure of the rear section of a light-homogenizing optical fiber bundle for projection and laser platemaking.

[0018] Reference numerals in the figure: 101, front section; 102, rear section; 201, circular optical fiber body; 202, polygonal optical fiber body. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] A method for making a uniform light optical fiber bundle for projection and laser plate making comprises the following steps: Step 1, the front section of the optical fiber bundle is processed into a circle, and the coating layer of the rear section of the optical fiber bundle is stripped off, and the length of the coating layer of the rear section of the optical fiber bundle is greater than 20 cm, so as to obtain a bare optical fiber section.

[0021] Step 2: Use a polygonal mold whose inner cavity has a polygonal mold cross-sectional shape, place the rear section of the optical fiber bundle with the coating stripped off in the polygonal mold, and ensure that the outer surface of the rear section of the optical fiber bundle fits the inner cavity of the polygonal mold.

[0022] In this step, the material of the polygonal mold used is tungsten steel, whose melting point temperature is greater than the melting point temperature of the optical fiber bundle material. The cavity cross-section inside the polygonal mold is any one of a hexagonal cross-section, a square cross-section or a triangular cross-section. The length of the polygonal mold is greater than 20 cm. In this embodiment, the preferred internal cavity cross-section of the polygonal mold is a hexagonal cross-section.

[0023] Step 3: Use a high-frequency induction heating device to heat the polygonal mold. During the hot-melt molding process, the fiber bundle material gradually softens, and under the action of the polygonal mold, the rear section of the fiber bundle is shaped into a polygonal cross-sectional structure. Using a polygonal mold for hot-melt processing can ensure that the cross-sections of each fiber are uniform and consistent during the processing, thereby avoiding the phenomenon of uneven beam output.

[0024] The high-frequency induction heating equipment provides a heating temperature of 1600℃-2000℃ to the polygonal mold. During the hot melt molding process, a clamp is used to clamp and fix the optical fiber bundle and the polygonal mold. The length of the clamp is not less than the length of the polygonal mold. This prevents the optical fiber bundle from deformation or displacement during the heating and molding process, thereby ensuring that the processed optical fiber bundle has a high-precision geometric structure.

[0025] Step 4, the front section of the optical fiber bundle and the rear section of the optical fiber bundle are connected by hot-melt smooth transition, and a coating layer is added to the outer surface of the rear section of the optical fiber bundle to achieve the integrity of the overall structure of the optical fiber bundle and ensure seamless connection and uniform output of the light beam.

[0026] By adopting the above manufacturing method, any material among quartz, glass or plastic can be selected to manufacture the optical fiber bundle. In this embodiment, quartz material is preferably selected, and the softening temperature of quartz optical fiber manufactured by high-purity quartz material is 1700°C.

[0027] This production method has the advantages of high structural stability, good beam transmission effect, and efficient heating and molding process. By using a special tungsten steel hexagonal mold and precision fixture, the geometric accuracy of the optical fiber bundle is ensured during the molding process. The circular cross-section of the front section is conducive to beam transmission, and the hexagonal cross-section of the rear section replaces the homogenizing rod to achieve beam homogenization. High-frequency induction heating equipment speeds up the processing process, and hot-melt molding technology makes the front and rear sections transition smoothly, ensuring the integrity of the optical fiber bundle and the stability of optical signal transmission, reducing light loss, and overall improving production efficiency and equipment durability.

[0028] like Figure 1As shown, a uniform light optical fiber bundle for projection and laser plate making is prepared according to the above-mentioned manufacturing method. The optical fiber bundle is made of any one of quartz, glass or plastic. In this embodiment, quartz material can be preferably used. The front section 101 of the optical fiber bundle is a circular optical fiber structure (its cross section is as shown in FIG. Figure 3 As shown in FIG. 1 ), the rear section 102 of the optical fiber bundle is processed into an optical fiber structure with a polygonal cross section by hot melt molding. In this embodiment, a hexagonal cross-sectional structure (such as Figure 4 As shown in the figure), the homogenization effect of the output light is achieved, replacing the traditional homogenization rod structure.

[0029] Reference Figure 2 The optical fiber bundle is composed of multiple single optical fibers, and the front and rear sections of the single optical fiber are respectively a circular optical fiber body 201 and a polygonal optical fiber body 202. The polygonal cross section of the polygonal optical fiber body 202 is the same as the polygonal cross section of the rear section 102. The position and length between the circular optical fiber body 201 and the front section 101 of the optical fiber bundle, as well as the position and length between the polygonal optical fiber body 202 and the rear section 102 correspond to each other. The lengths of the circular optical fiber body 201 and the polygonal optical body 202 match the optical path design of the optical fiber bundle to ensure that the homogenization effect of the light beam on the entire transmission path is optimal.

[0030] The polygonal cross-section of the rear section 102 and the polygonal optical fiber body 202 is any one of a hexagonal cross-section, a square cross-section or a triangular cross-section, and the cross-section types selected for the two are the same. In this embodiment, a hexagonal cross-section structure is preferred, which can effectively transmit optical signals within a predetermined wavelength range. The processing of the hexagonal optical fiber structure is achieved by optimizing the hot melt parameters to ensure that the optical fiber maintains stability after processing, and can effectively improve the filling factor of the light beam, thereby reducing the coupling loss between the light beams.

[0031] The above-mentioned optimization processing of the geometric structure of the optical fiber bundle in this embodiment improves the uniformity of the light beam, and is particularly suitable for optical systems that require highly uniform light beam output, such as laser projection, printing and display equipment.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for making a uniform light fiber bundle for projection and laser plate making, characterized in that: The following steps are involved: Step 1, the front section of the optical fiber bundle is processed into a circle, and the coating layer of the rear section of the optical fiber bundle is stripped to obtain a bare optical fiber section; Step 2, using a polygonal mold, whose inner cavity has a polygonal mold cross-sectional shape, placing the rear section of the optical fiber bundle with the coating stripped off in the polygonal mold, and ensuring that the outer surface of the rear section of the optical fiber bundle fits the inner cavity of the polygonal mold; Step 3, using a high-frequency induction heating device to heat the polygonal mold. During the hot melt molding process, the optical fiber bundle material gradually softens, and under the action of the polygonal mold, the rear section of the optical fiber bundle is shaped into a polygonal cross-sectional structure; Step 4: Connect the front section of the optical fiber bundle and the rear section of the optical fiber bundle by hot-melt smooth transition, and add a coating layer on the outer surface of the rear section of the optical fiber bundle.

2. The method for making a uniform light fiber bundle for projection and laser platemaking according to claim 1, characterized in that: The optical fiber bundle is made of any one of quartz, glass or plastic. The softening temperature of the quartz optical fiber made of quartz material is 1700°C.

3. The method for making a uniform light fiber bundle for projection and laser platemaking according to claim 1, characterized in that: In step 1, the length of the coating layer stripped from the rear section of the optical fiber bundle is greater than 20 cm.

4. The method for making a uniform light fiber bundle for projection and laser platemaking according to claim 1, characterized in that: In step 2, the material of the polygonal mold used is tungsten steel, whose melting point temperature is greater than the melting point temperature of the optical fiber bundle material. The cavity cross-section inside the polygonal mold is any one of a hexagonal cross-section, a square cross-section or a triangular cross-section, and the length of the polygonal mold is greater than 20 cm.

5. The method for making a uniform light fiber bundle for projection and laser platemaking according to claim 1, characterized in that: In step 3, the high-frequency induction heating device provides a heating temperature of 1600°C-2000°C to the polygonal mold.

6. The method for making a uniform light fiber bundle for projection and laser platemaking according to claim 1, characterized in that: Step 3: During the hot melt molding process, a clamp is used to clamp and fix the optical fiber bundle and the polygonal mold, and the length of the clamp is not less than the length of the polygonal mold.

7. A light-homogenizing optical fiber bundle for projection and laser platemaking, prepared by the method according to any one of claims 1 to 6, characterized in that: The front section (101) of the optical fiber bundle is a circular optical fiber structure, and the rear section (102) of the optical fiber bundle is processed into an optical fiber structure with a polygonal cross-section through hot-melt molding.

8. The light homogenizing optical fiber bundle for projection and laser platemaking according to claim 7, characterized in that: The optical fiber bundle is composed of a plurality of single optical fibers, the front and rear sections of the single optical fibers are respectively a circular optical fiber body (201) and a polygonal optical fiber body (202), the polygonal cross section of the polygonal optical fiber body (202) is the same as the polygonal cross section of the rear section (102), the position and length between the circular optical fiber body (201) and the front section (101) of the optical fiber bundle, and the position and length between the polygonal optical fiber body (202) and the rear section (102) are correspondingly matched.

9. The light homogenizing optical fiber bundle for projection and laser platemaking according to claim 7 or 8, characterized in that: The polygonal cross-section of the rear section (102) and the polygonal optical fiber body (202) is any one of a hexagonal cross-section, a square cross-section or a triangular cross-section, and the cross-section types selected for both are the same.

10. The light homogenizing optical fiber bundle for projection and laser platemaking according to claim 7, characterized in that: The optical fiber bundle is made of any one of quartz, glass or plastic.

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