CN215910687U - Optical module - Google Patents

Abstract

The utility model provides an optical module, which solves the problems of poor repeated insertion performance and poor concentricity of optical fibers in the conventional optical module. The optical module comprises a module main body, an ST connector, a convex lens and a convex lens pressure head; a first light through hole and a second light through hole which are sequentially enlarged in aperture and communicated are arranged in the module main body; the convex lens is arranged in the second light through hole, the convex lens pressing head comprises a first sleeve and a second sleeve which are connected and coaxially arranged, the first sleeve is arranged in the second light through hole, the convex lens is pressed in the second light through hole along the axial direction, the second sleeve is arranged in a through hole of the ST connector, and the ST connector is arranged on one side of the module main body and connected with the module main body.

Description

Optical module

Technical Field

The utility model belongs to the field of optoelectronic devices, and particularly relates to an optical module.

Background

The optical module is a photoelectronic device for photoelectric and electrooptical conversion, is a core component of a fluorescent optical fiber temperature measuring device, and is mainly used for coupling an optical path, filtering light waves, receiving and transmitting optical signals and the like. The stability and consistency of the optical module are mainly determined by the concentricity of the optical path, so how to accurately control the concentricity becomes the key to influence the performance of the optical module.

Currently, an optical module mainly consists of a module body and an ST fiber coupler, which has the following problems:

as shown in fig. 1, the front coupling portion of the ST fiber coupler 6 is connected to an optical fiber, and a ceramic sleeve 7 is disposed inside the ST fiber coupler 6, so that for the convenience of processing, a gap between the ceramic sleeve 7 and the ST fiber coupler 6 is large, and thus, the position of the optical fiber after each insertion into the ST fiber coupler 6 is different, and therefore, the repeated insertion of the optical fiber is extremely poor, and the difference can be more than 10 degrees. In addition, module body 1 needs to electroplate when processing, and under current environmental protection requirement, processing cost, cycle all can be very high, are unfavorable for the mass production.

As shown in fig. 2, the ST fiber coupler 6 is provided with fine threads 61, and is connected with the module body 1 through a thread locking structure, and since there is a certain gap between the threads, the concentricity of the optical module is poor, and further the measurement accuracy is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems of poor repeated insertion performance and poor concentricity of optical fibers of the conventional optical module and provides an optical module.

In order to realize the purpose of the utility model, the technical proposal of the utility model is as follows:

an optical module, includes module main part and ST connector, its characterized in that: the device also comprises a convex mirror and a convex mirror pressure head; a first light through hole and a second light through hole which are sequentially enlarged in aperture and communicated are formed in the module main body; the convex lens sets up in the second logical unthreaded hole, the convex lens pressure head is including first sleeve and the second sleeve that is connected and coaxial setting, first sleeve sets up in the second logical unthreaded hole, and compresses tightly the convex lens in the second logical unthreaded hole along the axial, the second sleeve sets up in the through-hole of ST connector, the ST connector sets up in one side of module main part, and is connected with the module main part.

Further, still be provided with the sealing washer between convex mirror and the first sleeve, the material of sealing washer specifically is silica gel.

Furthermore, the concentricity of the inner hole and the outer peripheral surface of the second sleeve is within 0.02 mm.

Further, be provided with the flange on the ST connector, the ST connector passes through flange and the fixed setting of bolt on the module main part.

Further, the convex mirror is a focusing mirror.

Furthermore, the convex lens pressure head is made of polytetrafluoroethylene.

Further, the module main body is a rectangular body.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

1. the ST connector is used at the front end of the optical module and is tightly matched with the convex lens pressure head, the concentricity of the optical module and the optical fiber connecting part is ensured by the convex lens pressure head, the clearance after the external optical fiber is inserted is extremely small, the repeated plugging error is small, and the temperature measuring precision is extremely high.

2. The installation mode of the ST connector in the optical module is changed from the original threaded screwing into the insertion type tight fit, so that the concentricity of the optical module is greatly improved, and the temperature measuring performance of the optical module is stable.

Drawings

FIG. 1 is a cross-sectional view of a prior art ST fiber optic coupler;

FIG. 2 is a diagram of an external form of a conventional ST fiber coupler;

fig. 3 is a schematic structural diagram of an optical module according to the present invention.

Reference numerals: 1-module body, 2-convex lens, 3-sealing ring, 4-convex lens pressure head, 5-ST connector, 11-first light through hole, 12-second light through hole, 41-first sleeve, 42-second sleeve, 51-flange, 6-ST optical fiber coupler, 61-fine thread and 7-ceramic sleeve.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention and are not intended to limit the scope of the present invention.

The utility model provides an optical module, wherein the concentricity of the optical module and an optical fiber connecting part is ensured by a convex lens pressure head, the original ST connector structure of a ceramic tube is replaced, and the repeated plugging precision is greatly improved. Meanwhile, the installation mode of the ST connector in the optical module is changed from the original threaded screwing into the insertion type tight fit, and the concentricity of the optical module is greatly improved.

As shown in fig. 3, the optical module of the present invention includes a module body 1, an ST connector 5, a packing 3, a convex lens 2, and a convex lens indenter 4. The module main body 1 is a rectangular body, a light path is arranged in the module main body, and specifically, a first light through hole 11 and a second light through hole 12 which are sequentially enlarged in aperture and communicated are arranged in the module main body 1; the convex lens 2 is arranged in the second light through hole 12, the convex lens pressing head 4 comprises a first sleeve 41 and a second sleeve 42 which are connected and coaxially arranged, the first sleeve 41 is arranged in the second light through hole 12, the convex lens 2 is pressed in the second light through hole 12 along the axial direction, the second sleeve 42 is arranged in a through hole of the ST connector 5, and the ST connector 5 is arranged on one side of the module main body 1 and connected with the module main body 1. Simultaneously, sealing washer 3 sets up between convex mirror 2 and convex mirror pressure head 4 for with convex mirror 2, convex mirror pressure head 4, ST connector 5 zonulae occludens, there is not the gap, this sealing washer 3's material specifically can be silica gel, the material of convex mirror pressure head 4 is polytetrafluoroethylene, needs anti purple light, this convex mirror 2 specifically can be the focusing mirror.

In the embodiment of the present invention, the connection manner of the ST connector 5 and the module main body 1 is as follows: the ST connector 5 is provided with a flange 51, and the ST connector 5 is fixedly arranged on the module body 1 through the flange 51 and bolts.

When the optical module is installed, the convex lens 2 is firstly installed in the module main body 1, then the sealing ring 3 is installed, the size of the sealing ring 3 can not shield a light path, then the convex lens pressure head 4 is inserted into the module main body 1, at the moment, the convex lens pressure head 4 is installed in the module main body 1 and tightly matched and clamped, the convex lens pressure head 4 is of a convex structure, the inner and outer concentricity is required to be within 0.02mm, namely the concentricity of the inner hole and the outer peripheral surface of the second sleeve 42 is required to be within 0.02 mm. Finally, the ST connector 5 is mounted on the convex lens indenter 4, and fixed to the module body 1.

The optical module can be used for temperature measurement and can also be applied to the fields of optical imaging, communication and the like. This optical module uses convex lens pressure head 4 to guarantee the module concentricity for optical module concentricity is high, and module temperature measurement performance is stable. Meanwhile, the ST connector 5 and the convex lens pressing head 4 are tightly matched at the front end of the optical module, the convex lens pressing head 4 and the module are tightly matched, the gap is extremely small after external optical fibers are inserted, repeated plugging errors are small, and the temperature measurement precision is extremely high.

Claims (8)

1. An optical module comprising a module body (1) and an ST connector (5), characterized in that: the device also comprises a convex mirror (2) and a convex mirror pressure head (4);

a first light through hole (11) and a second light through hole (12) which are sequentially enlarged in aperture and communicated are arranged in the module main body (1); the convex lens (2) is arranged in the second light through hole (12), the convex lens pressing head (4) comprises a first sleeve (41) and a second sleeve (42) which are connected and coaxially arranged, the first sleeve (41) is arranged in the second light through hole (12), the convex lens (2) is compressed in the second light through hole (12) along the axial direction, the second sleeve (42) is arranged in a through hole of the ST connector (5), the ST connector (5) is arranged on one side of the module main body (1) and is connected with the module main body (1).

2. The optical module of claim 1, wherein: and a sealing ring (3) is also arranged between the convex mirror (2) and the first sleeve (41).

3. The optical module of claim 2, wherein: the sealing ring (3) is made of silica gel.

4. The optical module of claim 1, 2 or 3, wherein: the concentricity of the inner hole and the outer peripheral surface of the second sleeve (42) is within 0.02 mm.

5. The optical module of claim 4, wherein: be provided with flange (51) on ST connector (5), ST connector (5) pass through flange (51) and bolt fastening sets up on module main part (1).

6. The optical module of claim 5, wherein: the convex lens (2) is a focusing lens.

7. The optical module of claim 6, wherein: the convex lens pressure head (4) is made of polytetrafluoroethylene.

8. The optical module of claim 7, wherein: the module main body (1) is a rectangular body.

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