Homogenizing optical fiber collimator

Abstract

The homogenized optical fiber collimator comprises an insertion tube, an optical fiber exposed end is inserted into the insertion tube, the outer ring end face of the insertion tube is flush with an optical fiber coating layer, the butt joint position of the outer ring end face of the insertion tube and the optical fiber coating layer is sleeved with a sleeve, a tube body of the insertion tube is inserted into a collimator tube, and one end of the inner wall of the collimator tube is provided with a homogenized lens; the exposed end of the optical fiber is inserted into the intubation tube, the intubation tube body is inserted into the collimator tube, the homogenizing lens is arranged at one end of the collimator tube, and light transmitted in the axial direction can be continuously refracted through the homogenizing lens, so that signal light emitted by the optical fiber is smoothly and continuously converged to one point, and light beams output by the optical fiber are converted into uniform light spots. The focusing performance of optical signals is improved, attenuation distortion of the optical signals is avoided, and the transmission efficiency of the optical signals in optical fibers is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical fiber transmission, and in particular relates to a homogenizing optical fiber collimator. Background Art

[0002] Homogenized optical fiber is widely used in the medical field, industrial control and industrial manufacturing. Optical sensors and optical devices in industrial control usually use homogenized optical fiber to transmit optical signals. It can operate stably under harsh environmental conditions such as high temperature, high humidity and corrosive gas environments, and can transmit different parameters such as temperature, pressure and humidity.

[0003] The problem encountered in practice is that tiny defects and density fluctuations in the optical fiber material can cause the signal light in the optical fiber to scatter, causing the transmitted signal beam to diverge, resulting in only a portion of the light being able to enter the target area, causing the optical signal to attenuate and reduce the optical signal transmission efficiency. Utility Model Content

[0004] To solve the problems existing in the above background technology, the present application proposes a homogenizing fiber collimator for converting the light beam output by the optical fiber into a uniform light spot, so as to improve the focusing of the optical signal and avoid attenuation and distortion of the optical signal.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A homogenizing optical fiber collimator comprises an insert tube, an exposed end of an optical fiber is inserted into the insert tube, an outer ring end face of the insert tube is flush with the optical fiber coating, a sleeve is sleeved at the joint between the outer ring end face of the insert tube and the optical fiber coating, the insert tube body is inserted into a collimating tube, and a homogenizing lens is provided at one end of the inner wall of the collimating tube.

[0007] In one embodiment of the present application, the outer wall of the cannula is provided with an external thread, and the inner wall of the collimating tube is provided with an internal thread.

[0008] In one embodiment of the present application, the homogenizing lens is a self-focusing lens.

[0009] In one embodiment of the present application, the collimating tube is a titanium alloy tube.

[0010] In one embodiment of the present application, a thin slot is formed on the outer side of the sleeve.

[0011] In one embodiment of the present application, a convex ring is provided on the inner wall of one end of the collimating tube.

[0012] In one embodiment of the present application, a polytetrafluoroethylene tube is sleeved on the outer wall of the collimating tube.

[0013] In summary, the technical solution proposed in this application includes the following beneficial technical effects: the exposed end of the optical fiber is inserted into the cannula, the cannula body is inserted into the collimating tube, and a homogenizing lens is provided at one end of the collimating tube. The homogenizing lens can cause the light transmitted along the axial direction to produce continuous refraction, thereby realizing the smooth and continuous convergence of the signal light emitted by the optical fiber to one point, so that the light beam output by the optical fiber is converted into a uniform light spot, so as to improve the focusing of the optical signal and avoid the attenuation and distortion of the optical signal, which is beneficial to improving the transmission efficiency of the optical signal in the optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 A schematic diagram of the three-dimensional structure of a homogenizing fiber collimator provided in one embodiment of the present application;

[0016] Figure 2 A schematic diagram of the structure of the assembly components of a homogenizing fiber collimator provided in one embodiment of the present application;

[0017] Figure 3 A schematic diagram of the structure of the assembly components of a homogenizing fiber collimator provided in one embodiment of the present application;

[0018] Figure 4 A schematic diagram of the structure of the assembly components of a homogenizing fiber collimator provided in one embodiment of the present application;

[0019] Figure 5 A schematic diagram of the cross-sectional structure of a homogenizing optical fiber collimator provided in one embodiment of the present application;

[0020] Figure 6 A schematic diagram of the cross-sectional structure of a homogenizing optical fiber collimator provided in one embodiment of the present application;

[0021] In the figure: cannula-1, external thread-11;

[0022] Optical fiber exposed end-2, optical fiber coating layer-21;

[0023] Casing-3, slot hole-31;

[0024] Collimator-4, convex ring-41;

[0025] Homogenizing lens-5;

[0026] PTFE tube-6. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0028] It should be noted that in the description of this application, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0029] The terms "mounted," "connected," and "connected" in this application should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0030] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0031] This embodiment provides a homogenizing optical fiber collimator, see Figures 1-6 As shown, it includes a cannula 1, an exposed end of an optical fiber 2 is inserted into the cannula 1, the outer ring end face of the cannula 1 is flush with the optical fiber coating layer 21, a sleeve 3 is sleeved at the joint between the outer ring end face of the cannula 1 and the optical fiber coating layer 21, the cannula 1 body is inserted into a collimating tube 4, and a homogenizing lens 5 is provided at one end of the inner wall of the collimating tube 4.

[0032] In the above embodiment, the exposed end 2 of the optical fiber is inserted into the cannula 1. The exposed end 2 of the optical fiber is the optical fiber core. The cannula 1 is used to position and fix the exposed end 2 of the optical fiber so that the exposed end 2 of the optical fiber remains in a straight state along the direction of the cannula 1. The outer ring end face of the cannula 1 is flush with the docking surface of the optical fiber coating 21. The optical fiber coating 21 can protect the optical fiber core from physical damage and chemical corrosion, and can also isolate the optical fiber core from the external environment to prevent crosstalk and signal attenuation between the optical fiber cores. The outer ring end face of the cannula 1 is flush with the docking surface of the optical fiber coating 21, which can be used to improve the stability of the docking between the optical fiber and the cannula 1. A sleeve 3 is sleeved at the docking point to improve the stability of the docking point and prevent the optical fiber from detaching from the cannula 1. Optionally, adding glue into the sleeve 3 can further improve the stability of the docking between the optical fiber and the cannula 1. The cannula 1 is inserted into the collimating tube 4. A homogenizing lens 5 is provided at one end of the collimating tube 4. The homogenizing lens 5 can cause the light transmitted along the axial direction to produce continuous refraction, thereby realizing smooth and continuous convergence of the signal light emitted by the optical fiber to one point, so that the light beam output by the optical fiber is converted into a uniform light spot, so as to improve the focusing of the optical signal and avoid the attenuation and distortion of the optical signal, which is beneficial to improving the transmission efficiency of the optical signal in the optical fiber.

[0033] In one embodiment of the present application, see Figure 4 As shown, the outer wall of the cannula 1 is provided with an external thread 11, and the inner wall of the collimating tube 4 is provided with an internal thread.

[0034] In the above embodiment, the external thread 11 on the outer wall of the cannula 1 is rotationally matched with the internal thread on the inner wall of the collimator tube 4. On the one hand, screwing the cannula 1 into the collimator tube 4 can increase the stability of the connection. On the other hand, when the cannula 1 is inserted into the collimator tube 4, the signal light in the optical fiber passes through the homogenizing lens 5 to form a light spot. It is necessary to adjust the distance between the optical fiber and the homogenizing lens 5, that is, adjust the distance between the insertion end of the cannula 1 and the homogenizing lens 5, and adjust the light spot until the boundary of the light spot is clear and sharp, and there is no gap at the edge. By screwing the cannula 1 into and out of the collimator tube 4 to adjust the distance between the insertion end of the cannula 1 and the homogenizing lens 5, the stability and accuracy of the distance adjustment can be improved.

[0035] In one embodiment of the present application, the homogenizing lens 5 is a self-focusing lens.

[0036] In the above embodiment, the self-focusing lens has a stronger light beam control capability than the existing spherical lens, and can achieve focusing, collimation, shaping and other control of the light beam through the continuous change of its internal refractive index, which is beneficial to improving the focusing of the optical signal.

[0037] In one embodiment of the present application, the collimator tube 4 is a titanium alloy tube.

[0038] In the above embodiment, the density of titanium alloy is lower than that of steel, but the strength is very high. Therefore, the titanium alloy tube has excellent stability, can adapt to various complex working environments, and is beneficial to improving the stability of the collimator.

[0039] In one embodiment of the present application, see Figure 1 As shown, a thin slot 31 is opened on the outer side of the sleeve 3.

[0040] In the above embodiment, it is possible to observe through the fine slot 31 whether the outer ring end face of the cannula 1 and the butt joint surface of the optical fiber coating layer 21 are flush, and it is also possible to inject adhesive into the inner side of the sleeve 3 through the fine slot 31 to make the connection between the outer ring end face of the cannula 1 and the butt joint surface of the optical fiber coating layer 21 more stable.

[0041] In one embodiment of the present application, see Figure 5 As shown, a convex ring 41 is provided on the inner wall of one end of the collimating tube 4 .

[0042] In the above embodiment, the convex ring 41 is used to assist in positioning when installing the homogenizing lens 5 at one end of the collimator 4, preventing the homogenizing lens 5 from sliding into the collimator 4 during installation, which is beneficial to improving the production and assembly efficiency of the collimator.

[0043] In one embodiment of the present application, see Figure 1 As shown, the outer wall of the collimating tube 4 is sleeved with a polyfluoro tube 6.

[0044] In the above embodiment, the polytetrafluoroethylene material has high hardness and wear resistance. Sleeving the polytetrafluoroethylene tube 6 on the outer wall of the collimator tube 4 can protect the collimator tube 4 from wear during use and extend the service life of the accessory.

[0045] During the actual use of this application: insert the exposed end 2 of the optical fiber into the cannula 1, so that the outer ring end face of the cannula 1 is flush with the docking surface of the optical fiber coating 21, and a sleeve 3 is sleeved at the docking point to improve the stability of the docking point and prevent the optical fiber from being separated from the cannula 1. It can be fixed with glue, and the homogenizing lens 5 is installed at one end of the collimating tube 4. It is glued and heated to cure. After curing, the glue marks remaining on the surface of the lens are cleaned, and the cannula 1 body is inserted into the collimating tube 4. The signal light in the optical fiber passes through the homogenizing lens 5 to form a light spot. Adjust the distance between the insertion end of the cannula 1 and the homogenizing lens 5, and adjust the light spot until the boundary of the light spot is clear and sharp, and there is no gap on the edge. Then fix the collimating tube 4 and the cannula 1, so that the signal light emitted by the optical fiber is smoothly and continuously converged to one point, so that the light beam output by the optical fiber is converted into a uniform light spot.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A homogenizing fiber collimator, characterized in that: The invention comprises a cannula (1), an exposed end of an optical fiber (2) is inserted into the cannula (1), an outer ring end face of the cannula (1) is flush with the optical fiber coating layer (21), a sleeve (3) is sleeved at the joint between the outer ring end face of the cannula (1) and the optical fiber coating layer (21), the cannula (1) is inserted into a collimating tube (4), and a homogenizing lens (5) is provided at one end of the inner wall of the collimating tube (4).

2. The homogenizing fiber collimator according to claim 1, characterized in that: The outer wall of the cannula (1) is provided with an external thread (11), and the inner wall of the collimating tube (4) is provided with an internal thread.

3. The homogenizing fiber collimator according to claim 1, characterized in that: The homogenizing lens (5) is a self-focusing lens.

4. The homogenizing fiber collimator according to claim 1, characterized in that: The collimating tube (4) is a titanium alloy tube.

5. The homogenizing fiber collimator according to claim 1, characterized in that: The outer side of the sleeve (3) is provided with a thin slot hole (31).

6. The homogenizing fiber collimator according to claim 1, characterized in that: A convex ring (41) is provided on the inner wall of one end of the collimating tube (4).

7. The homogenizing fiber collimator according to any one of claims 1 to 6, characterized in that: The outer wall of the collimating tube (4) is sleeved with a tetrafluoroethylene tube (6).

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