Collimator assembly structure

Abstract

The utility model discloses a collimator assembly structure which comprises a metal piece, an assembly cavity arranged inside the metal piece, an insertion core assembled at one end inside the assembly cavity, a sleeve sleeved at one side of the insertion core inside the assembly cavity, a tail plug sleeved at one end of the sleeve inside the assembly cavity, and an optical fiber head positioning port arranged at one end of the metal piece at the insertion core. The utility model has the following advantages: compared with the traditional coupling lens technology, the distance between the optical fiber head and the lens is directly controlled; the process steps are reduced, and tools required for coupling the LENS are saved; and meanwhile, the assembling time is effectively shortened, the assembling efficiency is improved, and batch production is more suitable.

Description

Technical Field

[0001] The utility model relates to the technical field of collimators, in particular to a collimator assembly structure. Background Art

[0002] In the operation of optical devices such as optical isolators, optical circulators, optical switches, optical attenuators, and optical wavelength division multiplexers, very high requirements are placed on the collimation of Gaussian beams, which is why fiber collimators are introduced.

[0003] The current optical collimator is to collimate the divergent light emitted from the optical fiber into a nearly parallel beam with a very small divergence angle, or to converge the parallel beam into the optical fiber (visible Figure 1 ) to improve the coupling efficiency of optical devices. Therefore, it has very strict requirements for assembly. Utility Model Content

[0004] The technical problem to be solved by the utility model is that, when assembling the existing optical collimator, the assembly time is increased due to the strict assembly requirements, so a collimator assembly structure is provided to solve the above problem.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a collimator assembly structure, which includes: a metal part, an assembly cavity is opened inside the metal part, a core is assembled at one end of the assembly cavity, a sleeve is sleeved at one side of the core inside the assembly cavity, a tail plug is sleeved at one end of the sleeve inside the assembly cavity, an optical fiber head positioning port is arranged at one end of the optical fiber head positioning port of the metal part, and a docking port is arranged on one side of the optical fiber head positioning port of the metal part.

[0006] As a preferred technical solution of the utility model, the distance between the upper port of the optical fiber head positioning port and the top of the ferrule is L, and a plug hole is provided in the middle of the ferrule.

[0007] As a preferred technical solution of the utility model, the inner diameter of the sleeve is the same as the outer diameter of the core, and the sleeve is sleeved on the outer wall of one end of the core.

[0008] As a preferred technical solution of the utility model, an expansion structure is provided at one end of the tail plug away from the sleeve, and the expansion structure abuts against the inner wall of the assembly cavity.

[0009] As a preferred technical solution of the utility model, a first annular structure is arranged on the outer wall of one end of the metal member, and a second annular structure is arranged on one end of the metal member close to the first annular structure.

[0010] As a preferred technical solution of the utility model, a dust cap is provided at the docking interface.

[0011] The utility model has the following advantages: compared with the traditional coupling lens technology, it directly controls the distance between the optical fiber head and the lens; reduces the process steps and saves the tooling required for coupling LENS; at the same time, it effectively reduces the assembly time and improves the assembly efficiency, making it more suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the coupling principle diagram of the prior art collimator;

[0013] Figure 2 It is a schematic cross-sectional view of a preferred embodiment of the utility model;

[0014] Figure 3 It is a schematic diagram of the dust cap assembly structure of a preferred embodiment of the utility model.

[0015] Explanation of the reference numerals: 1. Metal part; 101. Assembly cavity; 102. First annular structure; 103. Second annular structure; 2. Insert core; 201. Insert hole; 3. Sleeve; 4. Tail plug; 401. Expansion structure; 5. Fiber optic head positioning port; 6. Docking port; 7. Dust cap. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] The utility model will be further described below in conjunction with the accompanying drawings.

[0019] Please refer to Figure 1-Figure 3The collimator assembly structure of the utility model comprises: a metal part 1, an assembly cavity 101 is opened inside the metal part 1, a ferrule 2 is assembled at one end inside the assembly cavity 101, a sleeve 3 is sleeved on one side of the ferrule 2 inside the assembly cavity 101, a tail plug 4 is sleeved on one end of the sleeve 3 inside the assembly cavity 101, an optical fiber head positioning port 5 is arranged at one end of the metal part 1 at the ferrule 2, and a docking port 6 is arranged on one side of the optical fiber head positioning port 5 of the metal part 1.

[0020] The distance between the upper side port of the optical fiber head positioning port 5 and the top of the ferrule 2 is L, the middle of the ferrule 2 is provided with a plug hole 201, the inner diameter of the sleeve 3 is the same as the outer diameter of the ferrule 2, and the sleeve 3 is sleeved on the outer wall of one end of the ferrule 2

[0021] An expansion structure 401 is provided at one end of the tail plug 4 away from the sleeve 3, and the expansion structure 401 abuts against the inner wall of the assembly cavity 101. A first annular structure 102 is provided on the outer wall of one end of the metal part 1, and a second annular structure 103 is provided at one end of the metal part 1 close to the first annular structure 102. A dust cap 7 is worn at the docking port 6.

[0022] Specifically, during assembly, the present invention determines the working distance, spot diameter, and point accuracy of the collimator according to actual needs, and determines the distance L between the upper port of the optical fiber head positioning port 5 and the top of the ferrule 2 (the length, diameter, curvature radius of the collimator, and the spacing between the optical fiber and the collimator) based on Gaussian beam transmission theory.

[0023] When assembling the ferrule 2: make the metal part 1 used to assemble the base of the ferrule 2 according to the designed distance between the optical fiber and the collimator, and ensure that the metal part 1 can control the distance L between the collimator and the optical fiber head within the designed tolerance range. Assemble the ferrule 2 to the specified position, and ensure that the APC end is clean before press-fitting, so as to avoid the dead angle of the APC end after press-fitting and inability to completely clean.

[0024] When assembling the sleeve 3 and the tail plug 4: use the sleeve 3 assembly machine and the tail plug 4 automatic pressing machine to assemble the relevant parts in place to ensure that the tail plug 4 is flush with the base of the metal part 1.

[0025] When assembling the lens: The lens assembly must be assembled as shown in the figure, without any bulging, skewing, etc. When assembling, it is necessary to ensure that both sides of the collimator are clean and the coating layer is not damaged, otherwise it will affect the point accuracy and spot diameter. Cleaning: Use an automatic cleaning machine to clean the PC surface and check its optical performance. Wear a dust cap 7 to keep the end face clean.

[0026] In summary, compared with the traditional process of coupling to determine the light spot, the new process of the utility model fixes the distance from the optical fiber head to the collimator through the design of the metal part 1, avoids repeated debugging during the assembly process, and saves time and tooling costs.

[0027] The above are only preferred implementations of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

[0028] Other parts of the present invention not described in detail belong to the prior art and will not be described in detail here.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. Collimator assembly structure, including: The metal component (1) is characterized in that an assembly cavity (101) is provided inside the metal component (1), a core (2) is assembled inside one end of the assembly cavity (101), a sleeve (3) is sleeved on one side of the core (2) inside the assembly cavity (101), a tail plug (4) is sleeved on one end of the sleeve (3) inside the assembly cavity (101), an optical fiber head positioning port (5) is provided on one end of the optical fiber head positioning port (2), and a docking port (6) is provided on one side of the optical fiber head positioning port (5) on the metal component (1).

2. The collimator assembly structure according to claim 1, characterized in that: The distance between the upper side port of the optical fiber head positioning port (5) and the top of the ferrule (2) is L, and a plug hole (201) is provided in the middle of the ferrule (2).

3. The collimator assembly structure according to claim 1, characterized in that: The inner diameter of the sleeve (3) is the same as the outer diameter of the insert core (2), and the sleeve (3) is sleeved onto the outer wall of one end of the insert core (2).

4. The collimator assembly structure according to claim 1, characterized in that: An expansion structure (401) is provided at one end of the tail plug (4) away from the sleeve (3), and the expansion structure (401) abuts against the inner wall of the assembly cavity (101).

5. The collimator assembly structure according to claim 1, characterized in that: A first annular structure (102) is arranged on the outer wall of one end of the metal component (1), and a second annular structure (103) is arranged on one end of the metal component (1) close to the first annular structure (102).

6. The collimator assembly structure according to claim 1, characterized in that: The docking port (6) is provided with a dustproof cap (7).

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