CN110989103A

CN110989103A - Optical module

Info

Publication number: CN110989103A
Application number: CN201911329907.1A
Authority: CN
Inventors: 杨思更; 付深圳; 刘旭霞
Original assignee: Hisense Broadband Multimedia Technology Co Ltd
Current assignee: Hisense Broadband Multimedia Technology Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-04-10

Abstract

The application discloses optical module includes: a circuit board; a photoelectric chip; a lens assembly; an optical fiber holder; the lens assembly, comprising: a lens base body; a first positioning post; a second positioning column; the fiber optic support, comprising: the first positioning hole is formed in one side of the second assembling surface, opposite to the position of the lens base body, of the optical fiber support and penetrates through the first side surface, on the same side, of the optical fiber support; the second positioning hole is formed in the other side of the second mounting surface and penetrates through the second side surface of the optical fiber support, which is positioned on the same side; the first positioning column can be inserted into the first positioning hole, and the second positioning column can be inserted into the second positioning hole, so that the optical fiber support and the lens assembly are connected. The structural design of the optical module can solve the problems of high processing and assembling difficulty of the positioning columns and the positioning holes on the one hand and the problems of stability and reliability after assembly on the other hand.

Description

Optical module

Technical Field

The application relates to the technical field of optical fiber communication, in particular to an optical module.

Background

In an optical fiber communication system, an optical transceiver module, referred to as an optical module for short, is a standard module in the field of optical communication. The optical module is a connection module which plays a role in photoelectric conversion. A standard optical module typically includes a light emitting device, a light receiving device, and the like. The optical transmitter is used for converting the electrical signal into an optical signal and then transmitting the optical signal through the optical fiber, and the optical receiver is used for converting the optical signal transmitted by the optical fiber into the electrical signal. In addition, there are some optical modules in which a single light emitting device and a light receiving device are packaged together in a metal housing to make a bidirectional optical device, also called an optical transceiver.

An optical module generally includes an upper housing and a lower housing, and a circuit board is disposed between the upper housing and the lower housing. An opening at one end of the optical module is an electric port, and a part of one end of the circuit board, which extends out of the electric port, is a golden finger. Through the electric port and the golden finger, the optical module is inserted into a corresponding interface of a corresponding optical network terminal, so that electric signal transmission is realized.

The core component of an optical module is an optical transceiver, which generally includes a lens assembly, a laser, and a driver chip. The optical module also comprises an optical fiber support, wherein optical fibers are arranged on the optical fiber support, and a row of high-precision optical fiber core penetrating holes are designed on the optical fiber support so as to ensure that the optical fibers can be accurately fixed at the light convergence place of the lens component. When the assembly, the lens subassembly can design a pair of reference column of high accuracy, and the fiber support designs a pair of locating hole of high accuracy, and both can realize that the high accuracy closely cooperates. The lens assembly is small in size, and the positioning hole and the positioning column are small in size, so that the precision required by the positioning hole and the positioning column is very high, the processing technology requirement is high, the processing difficulty is high, and the assembly difficulty is high; in addition, the stability and reliability of the two after assembly are also weak.

Disclosure of Invention

The technical problem that this application will solve is for providing an optical module, when the reference column of lens subassembly and fiber support locating hole assemble, the great problem of its processing and the assembly degree of difficulty can be solved to this optical module's structural design on the one hand, and the problem of stability and reliability after on the other hand can solve the assembly.

In order to solve the above technical problem, the present application provides an optical module, including:

a circuit board having a signal circuit for providing signal electrical connections;

the photoelectric chip is arranged on the circuit board and used for generating optical signals or receiving optical signals;

the lens component is arranged on the circuit board and covers the photoelectric chip;

the optical fiber support is connected with the lens component and is provided with an optical fiber array;

the lens assembly, comprising:

the lens comprises a lens base body, a first groove is formed in the top surface of the lens base body, and a reflecting surface is formed on the inclined side wall of the first groove and used for changing the propagation direction of an optical signal;

the first positioning column extends out of one end of the side face of the lens base body and points to the direction of the optical fiber support; the second positioning column extends out from the other end of the side face of the lens base body and points to the direction of the optical fiber support;

the fiber optic support, comprising:

the first positioning hole is formed in the front end face of the optical fiber support, faces the first positioning column and is used for inserting the first positioning column;

the first positioning hole is provided with an opening on the front end face of the optical fiber bracket and the side face connected with the front end face respectively, and the two openings are communicated;

the second positioning hole is formed in the front end face of the optical fiber support, faces the second positioning column and is used for inserting the second positioning column;

the second positioning hole is provided with an opening on the front end face of the optical fiber support and the side face connected with the front end face respectively, and the two openings are communicated.

In the above embodiments, the circuit board is configured to provide signal electrical connections to the optoelectronic chip during operation, so that the optoelectronic chip emits optical signals or receives optical signals. The lens component is arranged on the circuit board and covers the photoelectric chip. When the photoelectric chip emits light signals or receives incoming light signals transmitted from the outside, the lens base body of the lens component plays a role in changing the propagation direction of light. The optical fiber support is used for being connected with the lens component, and optical fibers (the optical fibers can be arranged in an array mode) are connected onto the optical fiber support, so that optical signals with the propagation direction changed by the lens component are emitted into the optical fiber array, or the optical signals emitted by the optical fiber array are received by the photoelectric chip after the direction is changed by the lens component.

In the embodiment of the application, a first positioning column extends from one end of the side surface of the lens base body and points to the direction of the optical fiber support; the second positioning column extends out from the other end of the side face of the lens base body and points to the direction of the optical fiber support; the first positioning hole is formed in the front end face of the optical fiber support, faces the first positioning column and is used for inserting the first positioning column; the first positioning hole is provided with an opening on the front end face and the connected side face of the optical fiber bracket respectively, and the two openings are communicated; the second positioning hole is formed in the front end face of the optical fiber support, faces the second positioning column and is used for inserting the second positioning column; the second positioning hole is provided with an opening on the front end face and the connected side face of the optical fiber support respectively, and the two openings are communicated.

Therefore, in the structure, the two positioning holes are semi-closed holes, so that the processing technology is simpler, and the processing difficulty is reduced by a large amount. In addition, because the locating post is a semi-closed hole, when the locating post is assembled with the locating hole, the assembling difficulty is reduced. Moreover, because the processing difficulty and the assembly difficulty are both reduced, the sizes of the positioning hole and the positioning column can be larger, and the stability and the reliability of the positioning hole and the positioning column after assembly are also improved.

In conclusion, when the positioning column of the lens assembly is assembled with the positioning hole of the optical fiber support, the structural design of the optical module can solve the problem that the processing and assembling difficulty of the optical module is high on the one hand, and can solve the problems of stability and reliability after the assembly on the other hand.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a connection relationship of an optical communication terminal;

fig. 2 is a schematic structural diagram of an optical network terminal;

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

fig. 4 is an exploded structural diagram of an optical module according to an embodiment of the present disclosure;

FIG. 5-1 is a schematic diagram illustrating an example of an optical module according to the present invention, the lens assembly and the optical fiber holder being disassembled;

FIG. 5-2 is a schematic view of the component structure of FIG. 5-1 from another perspective;

FIG. 5-3 is a cross-sectional view of the lens assembly and fiber holder of FIG. 5-1 assembled together;

FIG. 6 is a schematic view of the assembled lens assembly and fiber holder and laser chip of FIG. 5-1;

fig. 7 is an exploded view of the structure of the components of fig. 6.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

In the following, some embodiments of the present application will be described in detail with reference to the drawings, and features in the following examples and examples may be combined with each other without conflict.

One of the core links of optical fiber communication is the interconversion of optical and electrical signals. The optical fiber communication uses optical signals carrying information to transmit in information transmission equipment such as optical fibers/optical waveguides, and the information transmission with low cost and low loss can be realized by using the passive transmission characteristic of light in the optical fibers/optical waveguides; meanwhile, the information processing device such as a computer uses an electric signal, and in order to establish information connection between the information transmission device such as an optical fiber or an optical waveguide and the information processing device such as a computer, it is necessary to perform interconversion between the electric signal and the optical signal.

The optical module realizes the function of interconversion of optical signals and electrical signals in the technical field of optical fiber communication, and the interconversion of the optical signals and the electrical signals is the core function of the optical module. The optical module is electrically connected with an external upper computer through a golden finger on an internal circuit board of the optical module, and the main electrical connection comprises power supply, I2C signals, data signals, grounding and the like; the electrical connection mode realized by the gold finger has become the mainstream connection mode of the optical module industry, and on the basis of the mainstream connection mode, the definition of the pin on the gold finger forms various industry protocols/specifications.

Fig. 1 is a schematic diagram of connection relationship of an optical communication terminal. As shown in fig. 1, the connection of the optical communication terminal mainly includes the interconnection among the optical network terminal 100, the optical module 200, the optical fiber 101 and the network cable 103;

one end of the optical fiber 101 is connected with a far-end server, one end of the network cable 103 is connected with local information processing equipment, and the connection between the local information processing equipment and the far-end server is completed by the connection between the optical fiber 101 and the network cable 103; and the connection between the optical fiber 101 and the network cable 103 is made by the optical network terminal 100 having the optical module 200.

An optical port of the optical module 200 is externally accessed to the optical fiber 101, and establishes bidirectional optical signal connection with the optical fiber 101; an electrical port of the optical module 200 is externally connected to the optical network terminal 100, and establishes bidirectional electrical signal connection with the optical network terminal 100; the optical module realizes the interconversion of optical signals and electric signals, thereby realizing the establishment of information connection between the optical fiber and the optical network terminal; specifically, the optical signal from the optical fiber is converted into an electrical signal by the optical module and then input to the optical network terminal 100, and the electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module and input to the optical fiber.

The optical network terminal is provided with an optical module interface 102, which is used for accessing an optical module 200 and establishing bidirectional electric signal connection with the optical module 200; the optical network terminal is provided with a network cable interface 104, which is used for accessing the network cable 103 and establishing bidirectional electric signal connection with the network cable 103; the optical module 200 is connected to the network cable 103 through the optical network terminal 100, specifically, the optical network terminal transmits a signal from the optical module to the network cable and transmits the signal from the network cable to the optical module, and the optical network terminal serves as an upper computer of the optical module to monitor the operation of the optical module.

At this point, a bidirectional signal transmission channel is established between the remote server and the local information processing device through the optical fiber, the optical module, the optical network terminal and the network cable.

Common information processing apparatuses include routers, switches, electronic computers, and the like; the optical network terminal is an upper computer of the optical module, provides data signals for the optical module, and receives the data signals from the optical module, and the common upper computer of the optical module also comprises an optical line terminal and the like.

Fig. 2 is a schematic diagram of an optical network terminal structure. As shown in fig. 2, the optical network terminal 100 has a circuit board 105, and a cage 106 is disposed on a surface of the circuit board 105; an electric connector is arranged in the cage 106 and used for connecting an electric port of an optical module such as a golden finger; the cage 106 is provided with a heat sink 107, and the heat sink 107 has a projection such as a fin that increases a heat radiation area.

The optical module 200 is inserted into the optical network terminal, specifically, the electrical port of the optical module is inserted into the electrical connector inside the cage 106, and the optical port of the optical module is connected to the optical fiber 101.

The cage 106 is positioned on the circuit board, and the electrical connector on the circuit board is wrapped in the cage, so that the electrical connector is arranged in the cage; the optical module is inserted into the cage, held by the cage, and the heat generated by the optical module is conducted to the cage 106 and then diffused by the heat sink 107 on the cage.

Fig. 3 is a schematic view of an optical module according to an embodiment of the present disclosure, and fig. 4 is a schematic view of an exploded structure of an optical module according to an embodiment of the present disclosure. As shown in fig. 3 and 4, an optical module 200 provided in the embodiment of the present application includes an upper housing 201, a lower housing 202, an unlocking member 203, a circuit board 300, a lens assembly 400, an optical fiber array 500, and an optical fiber socket 501.

The upper shell 201 is covered on the lower shell 202 to form a wrapping cavity with two openings; the outer contour of the wrapping cavity is generally a square body, and specifically, the lower shell comprises a main plate and two side plates which are positioned at two sides of the main plate and are perpendicular to the main plate; the upper shell comprises a cover plate, and the cover plate covers two side plates of the upper shell to form a wrapping cavity; the upper shell can also comprise two side walls which are positioned at two sides of the cover plate and are perpendicular to the cover plate, and the two side walls are combined with the two side plates to realize that the upper shell covers the lower shell.

The two openings may be two ends (204, 205) in the same direction, or two openings in different directions; one opening is an electric port 204, and a gold finger of the circuit board extends out of the electric port 204 and is inserted into an upper computer such as an optical network terminal; the other opening is an optical port 205 for external optical fiber access to connect with the lens assembly 400 inside the optical module; the photoelectric devices such as the circuit board 300 and the lens assembly 400 are positioned in the packaging cavity.

The assembly mode of combining the upper shell and the lower shell is adopted, so that the circuit board 300, the lens assembly 400 and other devices can be conveniently installed in the shells, and the upper shell and the lower shell form the outermost packaging protection shell of the optical module; the upper shell and the lower shell are made of metal materials generally, so that electromagnetic shielding and heat dissipation are facilitated; generally, the housing of the optical module is not made into an integrated component, so that when devices such as a circuit board and the like are assembled, the positioning component, the heat dissipation component and the electromagnetic shielding component cannot be installed, and the production automation is not facilitated.

The unlocking component 203 is located on the outer wall of the wrapping cavity/lower shell 202, and is used for realizing the fixed connection between the optical module and the upper computer or releasing the fixed connection between the optical module and the upper computer.

The unlocking component 203 is provided with a clamping component matched with the upper computer cage; the end of the unlocking component can be pulled to enable the unlocking component to move relatively on the surface of the outer wall; the optical module is inserted into a cage of the upper computer, and the optical module is fixed in the cage of the upper computer by a clamping component of the unlocking component; by pulling the unlocking component, the clamping component of the unlocking component moves along with the unlocking component, so that the connection relation between the clamping component and the upper computer is changed, the clamping relation between the optical module and the upper computer is released, and the optical module can be drawn out from the cage of the upper computer.

The circuit board 300 is provided with a light emitting chip, a driving chip, a light receiving chip, a transimpedance amplifier chip, an amplitude limiting amplifier chip, and a microprocessor chip, wherein the light emitting chip and the light receiving chip are directly attached to the circuit board of the optical module, and such a configuration is referred to as cob (chip on board) package in the industry.

The circuit board connects the electrical appliances in the optical module together according to the circuit design through circuit wiring to realize the functions of power supply, electrical signal transmission, grounding and the like.

The circuit board is generally a hard circuit board, and the hard circuit board can also realize a bearing effect due to the relatively hard material of the hard circuit board, for example, the hard circuit board can stably bear a chip; when the lens component and the corresponding optical chip are positioned on the circuit board, the rigid circuit board can also provide stable bearing; the hard circuit board can also be inserted into an electric connector in the upper computer cage, and specifically, a metal pin/golden finger is formed on the surface of the tail end of one side of the hard circuit board and is used for being connected with the electric connector; these are not easily implemented with flexible circuit boards.

A flexible circuit board is also used in a part of the optical module to supplement a rigid circuit board; flexible circuit boards are commonly used in conjunction with rigid circuit boards.

The lens assembly 400 is disposed on the circuit board 300 and disposed above the optical chips (the optical chips mainly include light emitting chips, driving chips, light receiving chips, transimpedance amplification chips, amplitude limiting amplification chips, and other chips related to photoelectric conversion functions) in a covering manner, and the lens assembly 400 and the circuit board 300 form a cavity for covering the light emitting chips, the light receiving chips, and other optical chips. The light emitted by the light emitting chip enters the optical fiber after being reflected by the lens assembly, the light from the optical fiber enters the light receiving chip after being reflected by the lens assembly, and the lens assembly establishes mutual optical connection among the light emitting chip, the optical power monitoring chip and the optical fiber array. The lens assembly not only serves to seal the optical chip, but also to establish optical connection between the optical chip and the optical fiber.

Optical fiber array 500 establishes optical connection between lens assembly 400 at one end and optical fiber receptacle 501 at the other end. The optical fiber array is composed of a plurality of optical fibers, transmits light from the lens assembly to the optical fiber socket to send out optical signals to the outside, transmits the light from the optical fiber socket to the lens assembly, and receives the optical signals from the outside of the optical module. The optical fiber array and the lens component have good optical coupling design, the multi-path converged light from the lens component enters the multi-path optical fibers of the optical fiber array, and the optical structure of the lens component is utilized to realize optical connection with the light emission chip; multiple paths of light from the optical fiber array are incident into the lens assembly, and optical connection with the light receiving chip is realized by the optical structure of the lens assembly.

The optical fiber receptacle 501 is a connector for connecting the optical module to an optical fiber outside the optical module. Fiber optic receptacles are generally of a standard shape and size to facilitate insertion of an external fiber optic plug, and have a plurality of fiber optic interfaces therein, including an optical signal outlet interface and an optical signal inlet interface. A common fiber optic plug is an MT plug (e.g., MPO (Multi-fiber Push On) fiber optic jumper connector). The optical fiber plug is inserted into the optical fiber socket of the optical module, so that optical signals inside the optical module can be transmitted into the external optical fiber, and optical signals outside the optical module can be transmitted into the optical module.

As introduced in the background art, the technical problems to be solved by the present application are: the difficulty of processing and assembling the two positioning columns of the lens assembly 410 and the positioning holes of the optical fiber bracket 500, and the reliability and stability after installation between the two positioning columns and the positioning holes. In view of the above, the present application provides an embodiment. Referring to fig. 5-1, 5-2, 5-3, 6 and 7, fig. 5-1 is a schematic exploded view of a lens assembly and a fiber holder of an optical module according to an embodiment of the present disclosure; FIG. 5-2 is a schematic view of the component structure of FIG. 5-1 from another perspective; FIG. 5-3 is a cross-sectional view of the lens assembly and fiber holder of FIG. 5-1 assembled together; FIG. 6 is a schematic view of the assembled lens assembly and fiber holder and laser chip of FIG. 5-1; fig. 7 is an exploded view of the structure of the components of fig. 6.

In this embodiment, the optical module includes an optoelectronic chip 430, and the optoelectronic chip 430 is disposed on the circuit board 300 for generating an optical signal. It should be noted that, as shown in fig. 7, the optoelectronic chip includes a transmitting chip, a receiving chip, a driving chip, and a transimpedance amplifier chip; the driving chip is matched with the transmitting chip and used for driving the transmitting chip to generate an optical signal; the transimpedance amplifier chip is used for being matched with the receiving chip and is used for receiving the optical signal in cooperation with the receiving chip.

The optical module further includes a lens assembly 400 disposed on the circuit board 300 and covering the optoelectronic chip 430 for changing a propagation direction of the optical signal. The optical module further comprises a fiber holder 580 for connecting with the lens assembly 400 and provided with an optical fiber for transmitting optical signals.

As shown in fig. 5-1 and 5-2, lens assembly 400 includes:

lens assembly 400, comprising:

a lens base 411, wherein a top surface of the lens base is provided with a first groove 415, a reflective surface 415a is formed on an inclined side wall of the first groove 415, and an optical signal emitted by the optoelectronic chip is reflected by the reflective surface 415a, then is emitted to the fiber lens array 416a to be converged, and finally enters the fiber array 500; note that the lens base 411 is a general term for the rest of the lens assembly 400 except for the first positioning column 413 and the second positioning column 414.

In operation, the circuit board 300 is used to provide signal electrical connections to the optoelectronic chip 430 so that the optoelectronic chip 430 emits optical signals or receives optical signals. Lens assembly 400 is disposed on a circuit board and covers optoelectronic chip 430. Thus, when the optoelectronic chip 430 emits an optical signal or receives an incoming optical signal transmitted from the outside, the lens body 411 of the lens assembly 400 functions to change the propagation direction of light. The optical fiber holder 580 is used for connecting with the lens assembly 400, and has optical fibers (the optical fibers may be arranged in an array), so that the optical signals whose propagation direction is changed by the lens assembly are incident into the optical fiber array 500, or the optical signals incident through the optical fiber array 500 are changed in direction by the lens assembly and then received by the optoelectronic chip.

A first positioning post 413 extending from a side of the first mounting surface 412 of the lens base 411 opposite to the fiber holder 580, that is, from an end of a side surface of the lens base, which can be defined as the first mounting surface 412, and directed toward the fiber holder; it should be noted that the first mounting surface 412 is not particularly limited, and refers to a surface of the lens base 411 opposite to the optical intensity support, from which the first positioning post 413 and the second positioning post 414 extend, and for the sake of description, the surface is defined as the first mounting surface 412 since the first positioning post 413 and the second positioning post 414 are used for mounting with the optical fiber support 580.

The second positioning posts 414 extend from the other end of the side of the lens base 411 and point in the direction of the fiber holder 580, i.e., from the other side of the first mounting surface 412.

As shown in fig. 5-1 and 5-2, a fiber holder 580 includes:

a first positioning hole 510 opened on the front end surface of the fiber holder 580 and facing the first positioning post 413, for insertion of the first positioning post 413, the first positioning hole 510 having an opening on the front end surface and a corresponding side surface of the fiber holder 580, respectively, and the two openings communicating with each other; the front end surface of the fiber holder 580 can be defined as a second mounting surface 530, that is, the first positioning hole 510 is opened on one side of the second mounting surface 530 opposite to the lens base 411 of the fiber holder 580 and penetrates through a first side surface of the fiber holder 580 on the same side; similarly, the definition of the second assembly plane 530 is the same as the naming rule of the first assembly plane 412 as described above: the side of the fiber holder 580 opposite to the lens assembly 400, on which the first positioning hole 510 and the second positioning hole 520 are opened for mounting, is defined as a second mounting surface 530 for convenience of description.

In addition, the first and second side surfaces 550 are two side surfaces of the fiber holder 580, and for convenience of description, the side surface on the side of the first positioning hole 510 is the first side surface 540, and the side surface on the side of the second positioning hole 520 is the second side surface 550. In the figure, the first side is not shown in the figure due to the occlusion relationship.

Referring to the meaning that the first positioning hole 510 penetrates the first side 540, as shown in fig. 5-1 and 5-2, the first positioning hole 510 is not closed on the first side 540 and thus is a semi-closed hole. The processing technology can be that the second assembly surface 530 is formed by punching and then penetrates through to the first side surface 540; it is also possible to cut a groove on the first side 540 and then penetrate to the second mounting surface 530, which is not limited in this application.

A second positioning hole 520 opened on the front end surface of the fiber holder 580 and facing the second positioning column 414 for inserting the second positioning column 414; the second positioning holes 520 have one opening on the front end surface and the corresponding side surface of the fiber holder 580, respectively, and the two openings communicate. That is, the second side surface 550 is opened at the other side of the second mounting surface and penetrates through the fiber holder 580 at the same side; referring to the second positioning hole 520 extending through the second side 550, as shown in fig. 5-1 and 5-2, the second positioning hole 520 is not closed at the second side 550 and is thus a semi-closed hole. The processing technology can be that the second assembly surface 530 is punched and then penetrates to the second side surface 550; it is also possible to cut a groove on the second side surface 550 and then penetrate to the second mounting surface 530, which is not limited in this application.

As shown in fig. 5-1 and 5-2, the first positioning post 413 can be inserted into the first positioning hole 510, and the second positioning post 414 can be inserted into the second positioning hole 520, so that the fiber holder 580 can be connected to the lens assembly 400.

In the structure, the two positioning holes are semi-closed holes, so that the processing technology is simpler, and the processing difficulty is reduced. In addition, because the locating post is a semi-closed hole, when the locating post is assembled with the locating hole, the assembling difficulty is reduced. Moreover, because the processing difficulty and the assembly difficulty are both reduced, the sizes of the positioning hole and the positioning column can be larger, and the stability and the reliability of the positioning hole and the positioning column after assembly are also improved.

It should be noted that, in the above embodiments, the shapes of the two positioning holes and the two positioning pillars are not limited, and therefore any shape of semi-closed positioning hole and corresponding positioning pillar should be within the scope of the present application. Of course, in order to further reduce the processing and assembling difficulty and improve the reliability and stability of the assembly, the first positioning pillar 413 may be a square positioning pillar, the first positioning hole 510 may be a square hole matched with the square positioning pillar, or the second positioning pillar 414 may be a square positioning pillar, and the second positioning hole 520 may be a square hole matched with the square positioning pillar.

In addition, in order to further enhance the connection strength and improve the stability and reliability of the assembly, the first positioning posts 413 are glued into the first positioning holes 510. The second positioning posts 414 are adhered to the second positioning holes 520 by glue. Of course, glue bonding is only an example. To other connected mode, as long as can promote the connection performance of reference column and locating hole, also all should be within the scope of protection of this application like other connected mode such as welding, riveting, lock joint, joint.

In addition, as shown in fig. 6, the fiber holder 580 is opened with a fiber hole 560 penetrating the second mounting surface 530 and the rear side surface thereof for passing the optical fiber therethrough, the fiber hole being located between the first positioning hole and the second positioning hole. Further, as shown in fig. 6, a dispensing hole 570 penetrating the fiber hole 560 is formed on the top surface of the fiber holder 580. Through the dispensing hole 570, glue is injected, so that the optical fiber can be stably coupled in the optical fiber hole 560.

In any of the above technical solutions, further improvements can be made.

The lens assembly 400 and the fiber holder 580, which are fixed together, are placed on the circuit board 300. To improve the stability of placement, the lens assembly 400 and the fiber holder 580, which are fixed together, may be glued to the circuit board 300. Of course, as mentioned above, other connection methods may be adopted, and the present application is not limited thereto.

In addition, as shown in fig. 5-1, a second groove 416 is formed on a side surface of the lens base 411 facing the fiber holder 580, a fiber lens array 416a is disposed in the second groove 416, and the fiber lens array 416a is located between the first positioning column 413 and the second positioning column 414. The optical signal reflected by the reflecting surface 415a can be converged and launched into the corresponding optical fiber array 500 through the optical fiber lens array 416 a.

In addition, a first groove may be disposed on the bottom wall of the lens assembly 400, the first groove 415 and the circuit board 300 enclose an accommodating cavity, and the optoelectronic chip 430 is disposed in the accommodating cavity. Alternatively, the circuit board 300 may be provided with a second groove, the second groove and the lens assembly 400 enclose an accommodating cavity, and the optoelectronic chip 430 is disposed in the accommodating cavity. Obviously, the two structural designs can conveniently realize the function of changing the propagation direction of the optical signal by the lens assembly 400.

The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.

Claims

1. A light module, comprising:

the lens assembly, comprising:

the fiber optic support, comprising:

2. The optical module of claim 1, wherein the first positioning post is a square positioning post, and the first positioning hole is a square hole for mating with the square positioning post.

3. The optical module as claimed in claim 1, wherein the second positioning posts are square positioning posts, and the second positioning holes are square holes matched with the square positioning posts.

4. A light module as claimed in any one of claims 1 to 3, characterized in that the first positioning stud is glued into the first positioning hole.

5. The optical module according to any one of claims 1 to 3, wherein the second positioning posts are adhered to the second positioning holes by glue.

6. The optical module according to any one of claims 1 to 3, wherein the optical fiber holder is provided with an optical fiber hole for the optical fiber array to pass through; the optical fiber hole is positioned between the first positioning hole and the second positioning hole.

7. The optical module according to claim 6, wherein the top surface of the optical fiber holder is provided with dispensing holes penetrating the optical fiber holes.

8. The optical module according to any one of claims 1 to 3, wherein a second groove is formed on a side surface of the lens base body facing the optical fiber holder, a fiber lens array is disposed in the second groove, and the fiber lens array is located between the first positioning column and the second positioning column.

9. A light module as claimed in any one of claims 1 to 3, wherein the lens assembly and the fibre optic support, when joined together, are glued to the circuit board.