Optical module

Abstract

An optical module disclosed by the present application comprises an optical transmit-receive component, the optical transmit-receive component comprises a lens assembly, an optical fiber support and a positioning column, the optical fiber support is provided with a first positioning hole, one surface of the lens assembly facing the optical fiber support is provided with a second lens and a second positioning hole, and the second positioning hole is located at one side of the second lens. And the positioning columns are fixed in the first positioning holes and the second positioning holes. The face where the second lens is located is not recessed inwards relative to the face, facing the optical fiber support, of the lens assembly, so that the thickness of an antireflection film of the second lens is uniform. The lens assembly or the optical fiber support is provided with a first limiting boss, the lens assembly and the optical fiber support are in limiting connection through the first limiting boss, and a gap exists between the second lens assembly and the end face of an optical fiber carried by the optical fiber support. According to the invention, the second positioning hole is located at one side of the second lens, and the surface where the second lens is located is not recessed inwards relative to the surface, facing the optical fiber support, of the lens assembly, so that the thickness of the antireflection film of the second lens is uniform.

Description

Technical Field

[0001] The present application relates to the field of optical fiber communication technology, and in particular to an optical module. Background Art

[0002] The optical module includes a circuit board, a lens assembly and an optical fiber bracket. An optical chip is arranged on the circuit board. The lens assembly is covered on the circuit board. A first lens is arranged on the side of the lens assembly facing the circuit board, and a second lens is arranged on the side of the lens assembly facing the optical fiber bracket. At present, the optical module reduces reflected light by coating an anti-reflection film on the first lens, and / or the side of the optical fiber of the optical fiber bracket facing the lens assembly is an inclined surface. However, the optical signal will also be reflected by the second lens, thereby affecting the performance of the optical chip. Therefore, the reflected light can be further reduced by coating the second lens with an anti-reflection film.

[0003] The second lens is generally recessed in the lens assembly. For example, there are three or four walls around the second lens. However, due to the limitation of the walls, the second lens has a shielding effect during coating, so that the coating cannot be uniform during coating, resulting in different thicknesses of the anti-reflection film on the second lens. Summary of the invention

[0004] The present application provides an optical module, wherein the anti-reflection film of the second lens has a uniform thickness.

[0005] An optical module, comprising:

[0006] Circuit boards;

[0007] An optical transceiver component is fixed on a circuit board; wherein the optical transceiver component includes a lens assembly, an optical fiber bracket and a positioning column, the optical fiber bracket has a first positioning hole, a second lens and a second positioning hole are provided on a side of the lens assembly facing the optical fiber bracket, the second positioning hole is located on one side of the second lens, the positioning column is fixed to the second positioning hole and the first positioning hole, the second lens is coated with an anti-reflection film, and the surface where the second lens is located is not recessed inward relative to a side of the lens assembly facing the optical fiber bracket; the lens assembly or the optical fiber bracket is provided with a first limiting boss, the lens assembly and the optical fiber bracket are limitedly connected by the first limiting boss, and there is a gap between the second lens and the end face of the optical fiber carried by the optical fiber bracket.

[0008] An optical module, comprising:

[0009] Circuit boards;

[0010] An optical transceiver component is fixed on a circuit board; wherein the optical transceiver component includes a lens assembly, an optical fiber bracket and a positioning column, the optical fiber bracket has a first positioning hole, a second lens and a second positioning hole are provided on a side of the lens assembly facing the optical fiber bracket, the second positioning hole is located on one side of the second lens, the first positioning hole and the second positioning hole are provided correspondingly, the positioning column is fixed to the first positioning hole and the second positioning hole, the second lens is plated with an anti-reflection film, and the second lens is fixed to the lens assembly through a supporting boss; the lens assembly or the optical fiber bracket is provided with a first limiting boss, the lens assembly and the optical fiber bracket are limitedly connected through the first limiting boss, and there is a gap between the second lens and the end face of the optical fiber carried by the optical fiber bracket.

[0011] Beneficial effects: The present application provides an optical module, comprising a circuit board and an optical transceiver component, wherein the optical transceiver component is fixed on the circuit board. The optical transceiver component comprises a lens assembly, an optical fiber bracket and a positioning column, wherein the optical fiber bracket has a first positioning hole, and the optical fiber bracket has a second positioning hole, wherein the first positioning hole and the second positioning hole are arranged correspondingly, and the fixing column is fixed to the second positioning hole and the first positioning hole to achieve alignment between the lens assembly and the optical fiber bracket. A second lens is arranged on one side of the lens assembly facing the optical fiber bracket, and the second lens is coated with an anti-reflection film to reduce reflected light. The second positioning hole is located on one side of the second lens, and the distance between the second positioning hole and the second lens is small. If a positioning column integrated with the lens assembly is arranged at the position of the second positioning hole, when the second lens is coated, the positioning column acts as a shield to affect the coating effect. Therefore, only the second positioning hole can be arranged on one side of the second lens. The second positioning hole is located on one side of the second lens, and the surface where the second lens is located is not recessed inward relative to the side of the lens assembly facing the optical fiber bracket, so as to reduce shielding around the second lens assembly, thereby reducing the shielding effect during coating, so that the thickness of the anti-reflection film of the second lens is uniform. The lens assembly or the optical fiber holder is provided with a first limiting boss, and the lens assembly and the optical fiber holder are limitedly connected through the first limiting boss, and there is a gap between the second lens and the end face of the optical fiber carried by the optical fiber holder, so that the optical signal converged by the second lens is coupled to the optical fiber carried by the optical fiber holder. In the present application, the second positioning hole is located on one side of the second lens, and the surface where the second lens is located is not recessed inward relative to the side of the lens assembly facing the optical fiber holder, so as to reduce the obstructions around the second lens assembly, so that the thickness of the anti-reflection film of the second lens is uniform; the lens assembly or the optical fiber holder is provided with a first limiting boss, and the lens assembly and the optical fiber holder are limitedly connected through the first limiting boss, so that the optical signal converged by the second lens is coupled to the optical fiber carried by the optical fiber holder. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 is a partial structural diagram of an optical communication system provided according to some embodiments;

[0014] Figure 2 A partial structural diagram of a host computer provided according to some embodiments;

[0015] Figure 3 A structural diagram of an optical module provided according to some embodiments;

[0016] Figure 4 is an exploded view of an optical module provided according to some embodiments;

[0017] Figure 5 A cross-sectional view of an optical transceiver component and a circuit board according to some embodiments;

[0018] Figure 6 An exploded view of an optical transceiver component and a circuit board according to some embodiments;

[0019] Figure 7 A structural diagram of an optical transceiver component provided according to some embodiments;

[0020] Figure 8 An exploded view of an optical transceiver component provided according to some embodiments;

[0021] Fig. 9 is a cross-sectional view of an optical transceiver component provided according to some embodiments;

[0022] Fig.10 A structural diagram of a conventional lens assembly provided according to some embodiments;

[0023] Fig.11 A structural diagram of an optical fiber support provided according to some embodiments;

[0024] Fig.12 A structural diagram of a first lens assembly provided according to some embodiments at a first viewing angle;

[0025] Fig.13 is a structural diagram of a first lens assembly provided in some embodiments at a second viewing angle;

[0026] Fig.14A cross-sectional view of a first lens assembly and an optical fiber support provided according to some embodiments;

[0027] Fig.15 is a structural diagram of a second lens assembly provided according to some embodiments;

[0028] Fig.16 A structural diagram of another optical fiber support provided according to some embodiments;

[0029] Fig.17 is a structural diagram of a third lens assembly provided according to some embodiments;

[0030] Fig.18 sectional view of a third lens assembly and another optical fiber support according to some embodiments. DETAILED DESCRIPTION

[0031] Some embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. However, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0032] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be interpreted as having an open, inclusive meaning, that is, "including, but not limited to"; the terms "first" and "second" are not to be understood as indicating or implying relative importance or indicating an upper limit on quantity; the term "plurality" means two or more; the term "connected" is to be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium; the use of the terms "suitable for" or "configured to" implies open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps; descriptions such as "parallel", "perpendicular", "same", "consistent", and "flush" are not limited to absolute mathematical theoretical relationships, but also include an acceptable error range generated in practice, and also include differences based on the same design concept but due to manufacturing reasons.

[0033] In optical communication technology, in order to establish information transmission between information processing devices, it is necessary to load information onto light and use the propagation of light to achieve information transmission. Here, the light loaded with information is an optical signal. When optical signals are transmitted in information transmission equipment, the loss of optical power can be reduced, so high-speed, long-distance, and low-cost information transmission can be achieved. The signals that information processing equipment can recognize and process are electrical signals. Information processing equipment usually includes optical network terminals (Optical Network Unit, ONU), gateways, routers, switches, mobile phones, computers, servers, tablets, televisions, etc., and information transmission equipment usually includes optical fibers and optical waveguides.

[0034] The optical module can realize the mutual conversion between optical signals and electrical signals between information processing equipment and information transmission equipment. For example, at least one of the optical signal input end or the optical signal output end of the optical module is connected to an optical fiber, and at least one of the electrical signal input end or the electrical signal output end of the optical module is connected to an optical network terminal; the first optical signal from the optical fiber is transmitted to the optical module, and the optical module converts the first optical signal into a first electrical signal, and transmits the first electrical signal to the optical network terminal; the second electrical signal from the optical network terminal is transmitted to the optical module, and the optical module converts the second electrical signal into a second optical signal, and transmits the second optical signal to the optical fiber. Since multiple information processing devices can transmit information through electrical signals, at least one of the multiple information processing devices needs to be directly connected to the optical module, and all information processing devices do not need to be directly connected to the optical module. Here, the information processing device directly connected to the optical module is called the upper computer of the optical module. In addition, the optical signal input end or the optical signal output end of the optical module can be called an optical port, and the electrical signal input end or the electrical signal output end of the optical module can be called an electrical port.

[0035] Figure 1 FIG. 1 is a partial structural diagram of an optical communication system provided according to some embodiments. Figure 1 As shown, the optical communication system mainly includes a remote information processing device 1000 , a local information processing device 2000 , a host computer 100 , an optical module 200 , an optical fiber 101 and a network cable 103 .

[0036] One end of the optical fiber 101 extends toward the remote information processing device 1000, and the other end of the optical fiber 101 is connected to the optical module 200 through the optical port of the optical module 200. The optical signal can be totally reflected in the optical fiber 101, and the propagation of the optical signal in the total reflection direction can almost maintain the original optical power. The optical signal undergoes multiple total reflections in the optical fiber 101 to transmit the optical signal from the remote information processing device 1000 to the optical module 200, or to transmit the optical signal from the optical module 200 to the remote information processing device 1000, thereby realizing long-distance, low-power loss information transmission.

[0037] The optical communication system may include one or more optical fibers 101, and the optical fibers 101 are detachably connected or fixedly connected to the optical module 200. The host computer 100 is configured to provide data signals to the optical module 200, receive data signals from the optical module 200, or monitor or control the working state of the optical module 200.

[0038] The host computer 100 includes a substantially rectangular housing and an optical module interface 102 disposed on the housing. The optical module interface 102 is configured to connect to the optical module 200 so that the host computer 100 and the optical module 200 establish a unidirectional or bidirectional electrical signal connection.

[0039] The host computer 100 also includes an external electrical interface, which can be connected to an electrical signal network. For example, the external electrical interface includes a Universal Serial Bus (USB) interface or a network cable interface 104, and the network cable interface 104 is configured to access the network cable 103 so that the host computer 100 establishes a unidirectional or bidirectional electrical signal connection with the network cable 103. One end of the network cable 103 is connected to the local information processing device 2000, and the other end of the network cable 103 is connected to the host computer 100, so as to establish an electrical signal connection between the local information processing device 2000 and the host computer 100 through the network cable 103. For example, the third electrical signal sent by the local information processing device 2000 is transmitted to the host computer 100 through the network cable 103, and the host computer 100 generates a second electrical signal according to the third electrical signal. The second electrical signal from the host computer 100 is transmitted to the optical module 200, and the optical module 200 converts the second electrical signal into a second optical signal, and transmits the second optical signal to the optical fiber 101, and the second optical signal is transmitted to the remote information processing device 1000 in the optical fiber 101. For example, the first optical signal from the remote information processing device 1000 is transmitted through the optical fiber 101, and the first optical signal from the optical fiber 101 is transmitted to the optical module 200, and the optical module 200 converts the first optical signal into a first electrical signal, and the optical module 200 transmits the first electrical signal to the host computer 100, and the host computer 100 generates a fourth electrical signal according to the first electrical signal, and transmits the fourth electrical signal to the local information processing device 2000. It should be noted that the optical module is a tool for realizing the mutual conversion between optical signals and electrical signals. During the conversion process between the optical signals and electrical signals, the information does not change, but the encoding and decoding methods of the information can change.

[0040] In addition to the optical network terminal, the host computer 100 also includes an optical line terminal (OLT), an optical network device (ONT), or a data center server.

[0041] Figure 2 FIG. 1 is a partial structural diagram of a host computer according to some embodiments. In order to clearly show the connection relationship between the optical module 200 and the host computer 100, Figure 2 Only the structure of the host computer 100 related to the optical module 200 is shown. Figure 2 As shown, the host computer 100 further includes a PCB circuit board 105 disposed in the housing, a cage 106 disposed on the surface of the PCB circuit board 105, a heat sink 107 disposed on the cage 106, and an electrical connector disposed inside the cage 106. The electrical connector is configured to access the electrical port of the optical module 200; the heat sink 107 has a protruding structure such as fins to increase the heat dissipation area.

[0042] The optical module 200 is inserted into the cage 106 of the host computer 100, and the cage 106 fixes the optical module 200. The heat generated by the optical module 200 is transferred to the cage 106 and then diffused through the heat sink 107. After the optical module 200 is inserted into the cage 106, the electrical port of the optical module 200 is connected to the electrical connector inside the cage 106, so that the optical module 200 establishes a bidirectional electrical signal connection with the host computer 100. In addition, the optical port of the optical module 200 is connected to the optical fiber 101, so that the optical module 200 establishes a bidirectional optical signal connection with the optical fiber 101.

[0043] Figure 3 is a structural diagram of an optical module provided according to some embodiments, Figure 4 FIG. 1 is an exploded view of an optical module provided according to some embodiments. Figure 3 and Figure 4 As shown, the optical module 200 includes a shell, a circuit board 300 disposed in the shell, and an optical transceiver component 900 .

[0044] The housing comprises an upper housing 201 and a lower housing 202 . The upper housing 201 covers the lower housing 202 to form the housing having two openings 204 and 205 . The outer contour of the housing is generally a square body.

[0045] In some embodiments, the lower shell 202 includes a bottom plate 2021 and two lower side plates 2022 located on both sides of the bottom plate 2021 and arranged perpendicular to the bottom plate 2021; the upper shell 201 includes a cover plate 2011, and the cover plate 2011 covers the two lower side plates 2022 of the lower shell 202 to form the above-mentioned shell.

[0046] In some embodiments, the lower shell 202 includes a bottom plate 2021 and two lower side plates 2022 located on both sides of the bottom plate 2021 and vertically arranged with the bottom plate 2021; the upper shell 201 includes a cover plate 2011 and two upper side plates located on both sides of the cover plate 2011 and vertically arranged with the cover plate 2011, and the two upper side plates are combined with the two lower side plates 2022 to realize that the upper shell 201 covers the lower shell 202.

[0047] The direction of the line connecting the two openings 204 and 205 may be consistent with the length direction of the optical module 200, or may be inconsistent with the length direction of the optical module 200. For example, the opening 204 is located at the end of the optical module 200 ( Figure 3 The opening 205 is also located at the end of the optical module 200 ( Figure 3 Alternatively, the opening 204 is located at the end of the optical module 200, and the opening 205 is located at the side of the optical module 200. The opening 204 is an electrical port, and the gold finger of the circuit board 300 extends from the electrical port and is inserted into the electrical connector of the host computer 100; the opening 205 is an optical port, which is configured to access the external optical fiber 101 so that the optical fiber 101 is connected to the optical transceiver component 900 in the optical module 200.

[0048] The upper housing 201 and the lower housing 202 are combined to facilitate the installation of the circuit board 300 and the optical transceiver component 900 into the housing, and the upper housing 201 and the lower housing 202 can encapsulate and protect the components. In addition, when assembling the circuit board 300 and the optical transceiver component 900, the positioning components, heat dissipation components, and electromagnetic shielding components of these components are conveniently arranged, which is conducive to automated production.

[0049] In some embodiments, the upper shell 201 and the lower shell 202 are made of metal materials to facilitate electromagnetic shielding and heat dissipation.

[0050] In some embodiments, the optical module 200 further includes an unlocking component 600 located outside its housing. The unlocking component 600 is configured to achieve a fixed connection between the optical module 200 and the host computer, or to release the fixed connection between the optical module 200 and the host computer.

[0051] For example, the unlocking component 600 is located on the outside of the two lower side plates 2022 of the lower housing 202, and includes a snap-fit ​​component that matches the cage 106 of the host computer 100. When the optical module 200 is inserted into the cage 106, the snap-fit ​​component of the unlocking component 600 fixes the optical module 200 in the cage 106; when the unlocking component 600 is pulled, the snap-fit ​​component of the unlocking component 600 moves accordingly, thereby changing the connection relationship between the snap-fit ​​component and the host computer, so as to release the fixation of the optical module 200 and the host computer, so that the optical module 200 can be pulled out of the cage 106.

[0052] The circuit board 300 includes circuit traces, electronic components and chips, etc. The electronic components and chips are connected according to the circuit design through the circuit traces to realize the functions of power supply, electrical signal transmission and grounding. The electronic components may include capacitors, resistors, transistors, metal-oxide-semiconductor field-effect transistors (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET), etc. The chips may include microcontroller units (Microcontroller Unit, MCU), laser driver chips, transimpedance amplifiers (Transimpedance Amplifier, TIA), limiting amplifiers (Limiting amplifier), clock and data recovery chips (Clock and Data Recovery, CDR), power management chips, digital signal processing (Digital Signal Processing, DSP) chips.

[0053] The circuit board 300 is generally a rigid circuit board. Due to its relatively hard material, the rigid circuit board can also realize the load-bearing function. For example, the rigid circuit board can stably carry the above-mentioned electronic components and chips; the rigid circuit board can also be inserted into the electrical connector in the cage 106 of the host computer 100.

[0054] The circuit board 300 also includes a gold finger formed on the end surface thereof, and the gold finger is composed of a plurality of independent pins. The circuit board 300 is inserted into the cage 106, and the gold finger is connected to the electrical connector in the cage 106. The gold finger can be provided on the surface of only one side of the circuit board 300 (for example, Figure 4 The upper surface shown in the figure) can also be set on the upper and lower surfaces of the circuit board 300 to provide a larger number of pins, so as to adapt to occasions where the number of pins is large. The gold finger is configured to establish an electrical connection with the host computer to achieve power supply, grounding, two-wire synchronous serial (Inter-Integrated Circuit, I2C) signal transmission, data signal transmission, etc. Of course, flexible circuit boards are also used in some optical modules. Flexible circuit boards are generally used in conjunction with rigid circuit boards to supplement rigid circuit boards.

[0055] Figure 5 A cross-sectional view of an optical transceiver component and a circuit board according to some embodiments. Figure 6 FIG. 1 is an exploded view of an optical transceiver component and a circuit board according to some embodiments. Figure 5 and Figure 6As shown, in some embodiments, an optical matching chip 302 and an optical chip 301 are provided on the circuit board 300. The optical matching chip 302 may be a bare chip such as a laser driver chip 321 and / or a TIA chip 322. The bare chip is bonded to the circuit board 300 by silver glue to play a role of fixing and heat dissipation, and then the bare chip is connected to the circuit board 300 by gold wire bonding. The optical chip 301 may be an optical transmitter chip 311 and / or an optical receiver chip 312. The optical transmitter chip 311 and the optical receiver chip 312 may be fixed side by side on the circuit board 300.

[0056] Since the optical chip 301 is attached to the circuit board 300, its light-emitting surface or light-incident surface is located on the top surface of the optical chip 301, so the light beam emitted by the optical transmitting chip is perpendicular to the circuit board 300, and the light beam received by the optical receiving chip is perpendicular to the circuit board 300; and the optical fiber 101 connected to the optical module is parallel to the circuit board 300, and it is necessary to change the transmission direction of the light beam emitted by the optical transmitting chip and the external light beam transmitted to the optical receiving chip. Therefore, the light beam emitted by the optical transmitting chip is changed by the optical transceiver component 900, so that the light beam emitted by the optical transmitting chip is reflected by the lens assembly, and the reflected light beam is parallel to the circuit board 300, so as to facilitate the coupling of the reflected light beam into the optical fiber; the receiving light beam transmitted by the external optical fiber is reflected by the lens assembly, and the reflected light beam is perpendicular to the circuit board 300, so as to be convenient for being received by the optical receiving chip.

[0057] like Figure 5 As shown, a first lens 9121 is provided on the side of the optical transceiver component 900 facing the circuit board 300, a reflective surface 9131 is provided on the side of the optical transceiver component 900 facing away from the circuit board 300, a second lens 9142 is provided on the side of the optical transceiver component 900 facing the light port, and the first lens 9121 is located above the optical chip 301.

[0058] Figure 7 A structural diagram of an optical transceiver component provided according to some embodiments. Figure 8 An exploded view of an optical transceiver component provided according to some embodiments. Fig. 9 FIG. 4 is a cross-sectional view of an optical transceiver component provided according to some embodiments. Figure 7 , Figure 8 and Fig. 9 As shown, in some embodiments, the optical transceiver component 900 includes a lens assembly 901 and an optical fiber bracket 902, the transparent lens assembly 901 is connected to the optical fiber bracket 902, and the lens assembly 901 is covered on the optical matching chip 302 and the optical chip 301 on the circuit board 300 to place the optical matching chip 302 and the optical chip 301 in the covering cavity formed by the lens assembly 901 and the circuit board 300.

[0059] like Fig. 9As shown, the side of the lens assembly 901 facing the circuit board 300 is recessed inward to form a cover groove 911, and the cover groove 911 is provided with a first lens 9121, and the first lens 9121 is located directly above the optical chip 301 to achieve collimation or convergence of the light beam; the side of the lens assembly 901 facing away from the circuit board 300 is recessed inward to form an optical port groove 913, and the side wall of the optical port groove 913 is a reflective surface 9131, and the reflective surface 9131 is located above the first lens 9121 to achieve reflection of the light beam; the side of the lens assembly 901 facing the optical fiber bracket 902 is provided with a second lens 9142 to achieve convergence or collimation of the light beam.

[0060] The optical transmitting chip 311 emits a divergent light beam, which is converted into a collimated light beam by the first lens 9121. The collimated light beam is projected to the reflective surface 9131 for reflection. The reflected collimated light beam is converted into a convergent light beam by the second lens 9142 and coupled to the optical fiber, and is transmitted to the outside of the optical module by the optical fiber to realize the emission of the optical signal. The light beam outside the optical module is transmitted to the second lens 9142 via the optical fiber, and is collimated into a collimated light beam by the second lens 9142. The collimated light beam is projected to the reflective surface 9131 for reflection. The reflected collimated light beam is transmitted vertically downward, and after being coupled by the first lens 9121, it is vertically incident on the optical receiving chip 312 to realize the reception of the optical signal.

[0061] As the transmission rate of optical modules is getting higher and higher, the optical transmitter chip used in the current single-wavelength 100G optical module is particularly sensitive to reflected light. The reflected light will affect the performance of the optical transmitter chip itself, thereby destroying the original characteristics of the optical transmitter chip and causing errors and other defects. At present, the optical module reduces the reflected light by coating the first lens of the lens assembly with an anti-reflection film, and / or the side of the optical fiber of the optical fiber holder facing the lens assembly is an inclined surface. However, the optical signal will also be reflected on the surface where the second lens is located in the lens assembly, thereby affecting the performance of the optical transmitter chip. Therefore, the second lens can be coated with an anti-reflection film to improve the reduction of reflected light. However, due to the requirements of the optical path, there must be a certain distance between the lens assembly and the optical fiber end face of the optical fiber holder as the focal length of the second lens, and the optical fiber holder and the lens assembly need to be tightly matched to accurately fix the position of the optical fiber and the lens assembly. Therefore, the second lens is generally recessed in the lens assembly.

[0062] Fig.10 FIG. 1 is a structural diagram of a conventional lens assembly provided according to some embodiments. Fig.10As shown, the side of the lens assembly 901 facing the optical fiber bracket is a fixed surface 9146, and a second lens 9142 is arranged on the fixed surface 9146. The first limiting boss 9144 is arranged on both sides of the second lens 9142. The first limiting boss 9144 is arranged with a positioning column 903. The distance between the first limiting boss 9144 and the second lens 9142 is relatively close, so that there is a wall around the second lens 9142. Due to the limitation of the wall, the second lens 9142 has a shielding effect during coating, so that the coating cannot be uniform during coating, resulting in different thicknesses of the anti-reflection film of the second lens. In order to solve this problem, the first limiting boss 9144 is cut to make the first limiting boss 9144 away from the second lens 9142. However, the space of the first limiting boss 9144 away from the second lens 9142 is small, and the positioning column 903 cannot be set on it. The distance between the positioning column 903 and the second lens 9142 is a fixed value, so the positioning column 903 can only be set on the side of the lens assembly 901 facing the optical fiber bracket 902, that is, the fixed surface 9146. However, the distance between the positioning column 903 and the second lens 9142 is relatively close, and the positioning column 903 and the lens assembly 901 are an integrally formed structure. When the second lens 9142 is coated, the positioning column 903 will act as a shield and affect the coating effect. Therefore, in some embodiments, the second lens 9142 and the second positioning hole are provided on the side of the lens assembly 901 facing the optical fiber bracket, and the surface where the second lens 9142 is located is not recessed inward relative to the side of the lens assembly 901 facing the optical fiber bracket 902, and the second positioning hole is located on one side of the second lens 9142.

[0063] The positioning post 903 and the lens assembly 901 are two independent structural parts. When the second lens 9142 is not coated, the positioning post 903 is not fixed to the second positioning hole. After the coating of the second lens 9142 is completed, the positioning post 903 is fixed to the second positioning hole. Therefore, the surface where the second lens 9142 is located is not concave inward relative to the surface of the lens assembly 901 facing the optical fiber bracket 902, and the second positioning hole is located on one side of the second lens 9142 to reduce the obstructions around the second lens 9142 and reduce the obstruction effect, thereby making the thickness of the anti-reflection film of the second lens 9142 the same.

[0064] In some embodiments, the surface of the second lens 9142 is flush with the surface of the lens assembly 901 facing the optical fiber holder 902, thereby reducing obstructions around the second lens 9142 and reducing the obstruction effect, thereby making the thickness of the anti-reflection film of the second lens 9142 the same.

[0065] When the second lens 9142 is coated, a clamp is required to clamp the lens assembly 901. The clamp includes a clamp frame. When the clamp clamps the lens assembly, the second lens 9142 is located in the clamp frame. However, since the clamp frame also has a certain thickness, a partial shielding effect will still occur when the second lens 9142 is coated, resulting in different thicknesses of the anti-reflection film of the second lens 9142. In order to solve this problem, in some embodiments, the surface where the second lens 9142 is located protrudes outwardly relative to the side of the lens assembly 901 facing the optical fiber holder 902, that is, the surface where the second lens 9142 is located protrudes toward the direction of the optical fiber holder 902 relative to the side of the lens assembly 901 facing the optical fiber holder 902.

[0066] In some embodiments, the surface where the second lens 9142 is located protrudes outward relative to the side of the lens assembly 901 facing the optical fiber bracket 902, and the distance between the surface where the second lens 9142 is located and the side of the lens assembly 901 facing the optical fiber bracket 902 is greater than zero.

[0067] In some embodiments, the surface where the second lens 9142 is located protrudes outward relative to the side of the lens assembly 901 facing the optical fiber bracket 902, and the distance between the surface where the second lens 9142 is located and the side of the lens assembly 901 facing the optical fiber bracket 902 matches the thickness of the fixture frame. For example, the distance between the surface where the second lens 9142 is located and the side of the lens assembly 901 facing the optical fiber bracket 902 is the same as the thickness of the fixture frame.

[0068] In some embodiments, the optical fiber holder 902 has a first positioning hole, and the first positioning hole is arranged corresponding to the second positioning hole of the lens assembly 901. The positioning column 903 and the lens assembly 901 are two independent structural components. The positioning column 903 is fixed to the first positioning hole and the second positioning hole to achieve alignment between the lens assembly 901 and the optical fiber holder 902, thereby achieving that the center axis height of the second lens 9142 of the lens assembly 901 is flush with the center axis height of the optical fiber carried by the optical fiber holder 902.

[0069] Since the positioning post 903 and the lens assembly 901 are two independent structural parts, the positioning post 903 is not assembled to the lens assembly 901 before the second lens 9142 is coated; after the second lens 9142 is coated, the positioning post 903 is assembled to the lens assembly 901. Therefore, when the second lens 9142 is coated, there is no shielding around the second lens 9142, which reduces the shielding effect of the second lens 9142 when it is coated.

[0070] In order to improve the positioning accuracy of the optical fiber support 902 and the lens assembly 901, in some embodiments, the allowable error range of the positioning column 903 matches the assembly error range of the optical fiber support 902 and the lens assembly 901. For example, the allowable error range of the positioning column 903 is the same as the assembly error range of the optical fiber support 902 and the lens assembly 901; the allowable error range of the positioning column 903 is smaller than the assembly error range of the optical fiber support 902 and the lens assembly 901. Preferably, the positioning column 903 is a high-precision metal needle.

[0071] In some embodiments, the optical transceiver component 900 is provided with a first limiting boss, the lens assembly 901 and the optical fiber holder 902 are limitedly connected through the first limiting boss, and there is a gap between the second lens 9142 and the end face of the optical fiber carried by the optical fiber holder 902, so that the optical signal after convergence by the second lens 9142 is coupled to the optical fiber carried by the optical fiber holder 902. That is, the lens assembly 901 or the optical fiber holder 902 is provided with a first limiting boss, and the lens assembly 901 and the optical fiber holder 902 are limitedly connected through the first limiting boss. For example, the first limiting boss is provided on the outer side of the second positioning hole, and the end face of the optical fiber holder 902 is limitedly connected to the first limiting boss of the lens assembly 901; the end face of the optical fiber holder 902 has a first limiting boss, and the side of the lens assembly 901 facing the optical fiber holder 902 is limitedly connected to the first limiting boss of the optical fiber holder 902. Among them, the lens assembly 901 and the optical fiber bracket 902 are limitedly connected by the first limiting boss, which means that when the lens assembly 901 has the first limiting boss, the first limiting boss is located on the side of the second positioning hole away from the second lens, and the optical fiber bracket 902 stops at the first limiting boss, that is, the optical fiber bracket 902 contacts with the first limiting boss, and the optical fiber bracket 902 is fixedly connected to the first limiting boss by glue; or, when the optical fiber bracket 902 has the first limiting boss, the lens assembly 901 stops at the first limiting boss, that is, the lens assembly 901 contacts with the first limiting boss, and the lens assembly 901 is fixedly connected to the first limiting boss by glue.

[0072] Fig.11 FIG. 1 is a structural diagram of an optical fiber support provided according to some embodiments. Fig.11 As shown, in some embodiments, a first positioning hole 921 is provided at the end of the optical fiber bracket 902a, and the first positioning hole 921 is arranged opposite to the second positioning hole of the lens assembly 901, so that the optical fiber bracket 902a is docked with the lens assembly 901, and the positioning column 903 crosses the second positioning hole and the first positioning hole 921 to position and install the optical fiber bracket 902a.

[0073] The end face of the optical fiber holder 902a is also provided with an optical fiber hole, and the front end face of the optical fiber holder 902a (the opposite side of the end face of the optical fiber holder 902a) is provided with an optical fiber socket, and the optical fiber hole is connected with the optical fiber socket, so that the optical fiber 923 is inserted into the optical fiber hole through the optical fiber socket, and the light incident surface of the optical fiber 923 can be located inside the optical fiber holder 902a, or it can protrude from the end face of the optical fiber holder 902a.

[0074] Insert the optical fiber 923 into the optical fiber holder 902a through the optical fiber jack, and use sealant to seal all the gaps between the optical fiber 923 and the optical fiber jack. The sealant is added to the periphery of the contact between the optical fiber 923 and the optical fiber jack, and is accumulated on the front end faces of the optical fiber 923 and the optical fiber holder 902a. After the sealant is cured, a sealing colloid is formed to prevent the cooling liquid from extending into the interior of the optical fiber holder 902a through the optical fiber jack.

[0075] like Fig.11 As shown, an observation hole 922 is also provided at the upper end of the optical fiber bracket 902a, and the observation hole 922 is communicated with the optical fiber hole in the optical fiber bracket 902a, and the insertion of the optical fiber 923 into the optical fiber bracket 902a can be checked through the observation hole 922. After the optical fiber 923 is inserted into the optical fiber bracket 902a through the optical fiber insertion hole, sealing glue can be added to the observation hole 922 to form a sealing colloid, so that the observation hole 922 is sealed by the sealing colloid to prevent the coolant from penetrating into the interior of the optical fiber bracket 902a through the observation hole 922.

[0076] Fig.12 This is a structural diagram of a first lens assembly provided according to some embodiments at a first viewing angle. Fig.13 This is a structural diagram of a first lens assembly provided according to some embodiments at a second viewing angle. Fig.14 1 is a cross-sectional view of a first lens assembly and an optical fiber support provided according to some embodiments. Fig.12 , Fig.13 and Fig.14As shown, the side of the lens assembly 901a facing the circuit board 300 is recessed inward to form a cover groove 911, and a placement protrusion 912 is provided on the cover groove 911. The placement protrusion 912 is provided with a first lens 9121, and the first lens 9121 is located directly above the optical chip to achieve collimation or convergence of the light beam; the side of the lens assembly 901a facing away from the circuit board 300 is recessed inward to form an optical port groove 913, and the side wall of the optical port groove 913 is a reflection surface 9131, and the reflection surface 9131 is located above the first lens 9121 to achieve the collimation or convergence of the light beam. Reflection; one side of the lens assembly 901a facing the optical fiber bracket 902a is a fixed surface 9146, and the fixed surface 9146 is provided with a second lens 9142 to achieve light beam convergence or collimation; the fixed surface 9146 is also provided with a second positioning hole 9143, and the surface where the second lens 9142 is located is not recessed relative to the fixed surface 9146, and the second positioning hole 9143 is located on one side of the second lens 9142 to reduce the obstructions around the second lens 9142 and reduce the obstruction effect, thereby making the thickness of the anti-reflection film of the second lens 9142 the same.

[0077] like Fig.12 As shown, in some embodiments, the second lens 9142 is fixed to the fixing surface 9146 via the supporting boss 9141, and the thickness of the supporting boss 9141 is zero. That is, the second lens 9142 is directly fixed to the fixing surface 9146, so that the surface where the second lens 9142 of the lens assembly 901a is located is flush with the fixing surface 9146.

[0078] In some embodiments, the second lens 9142 is fixed to the fixing surface 9146 via the supporting boss 9141 , and the thickness of the supporting boss 9141 is greater than zero, that is, the surface where the second lens 9142 of the lens assembly 901 a is located protrudes outward relative to the fixing surface 9146 .

[0079] In some embodiments, the second lens 9142 is fixed to the fixing surface 9146 via a supporting boss 9141, and the thickness of the supporting boss 9141 matches the preset thickness. For example, the thickness of the supporting boss 9141 is the same as the preset thickness, which is the thickness of the fixture frame.

[0080] like Fig.12 As shown, the second positioning hole 9143 extends from the fixing surface 9146 to one end away from the optical fiber bracket 902a. After the second lens 9142 is coated, glue is injected into the second positioning hole 9143 and the first positioning hole 921 to fix the positioning column 903 in the second positioning hole 9143 and the first positioning hole 921.

[0081] Since the longer the second positioning hole 9143 extends toward the end away from the optical fiber bracket 902a, the better the stability of the positioning column 903 and the second positioning hole 9143. Therefore, in some embodiments, the stability of the positioning column 903 and the second positioning hole 9143 can be improved by extending the length of the second positioning hole 9143. For example, the second positioning hole 9143 crosses the lens assembly 901a, that is, the second positioning hole 9143 passes through from the side of the lens assembly 901a facing the optical fiber bracket 902a to the side of the lens assembly 901a facing away from the optical fiber bracket 902a.

[0082] However, since the size of the second positioning hole 9143 matches the size of the positioning column 903, the amount of glue that can be placed in the second positioning hole 9143 is limited. In order to further improve the stability of the positioning column 903 and the second positioning hole 9143, in some embodiments, a placement recess 915 is provided behind the optical port slot 913 of the lens assembly 901a, and the positioning column 903 and a sealing colloid are placed in the placement recess 915. The gap between the positioning column 903 and the placement recess 915 is filled with sealing colloid, and the second positioning hole 9143 is also filled with sealing colloid, so that the positioning column 903 is fixedly connected to the second positioning hole 9143. That is, after the positioning column 903 is inserted into the second positioning hole 9143 and the first positioning hole 921, glue is injected into the storage recess 915, there is glue in the gap between the positioning column 903 located in the storage recess 915 and the lens assembly 901a, and water glue is injected into the second positioning hole 9143. After the glue is cured, the positioning column 903 located at the storage recess 915 is fixed on the lens assembly 901a, and the positioning column 903 located in the second positioning hole 9143 is fixed to the second positioning hole 9143, so that the positioning column 903 is fixedly connected to the second positioning hole 9143.

[0083] In some embodiments, one end of the positioning column 903 is located at the placement recess 915 , and the other end of the positioning column 903 is located in the first positioning hole 921 .

[0084] In some embodiments, one end of the positioning post 903 passes over the placement recess 915 and reaches the second positioning hole 9143 at the left end of the placement recess 915, and the other end of the positioning post 903 is located in the first positioning hole 921. The left end of the placement recess 915 refers to the end of the placement recess 915 away from the optical fiber bracket 902a.

[0085] In some embodiments, one end of the positioning column 903 passes over the storage recess 915 and the second positioning hole 9143 at the left end of the storage recess 915 and extends out of the lens assembly 901a, and the other end of the positioning column 903 is located in the first positioning hole 921.

[0086] In order to fix the positioning column 903 in the storage recess 915 , in some embodiments, the storage recess 915 includes a storage groove 9152 , which is connected to the second positioning hole 9143 so that the positioning column 903 can be placed in the storage groove 9152 and the second positioning hole 9143 .

[0087] In some embodiments, the storage slot 9152 is an arc-shaped structure, the curvature of the arc-shaped structure is the same as the curvature of the second positioning hole 9143 in the storage recess 915, and the lowest point of the storage slot 9152 is at the same height as the lowest point of the second positioning hole 9143, so that the positioning column 903 fits better with the storage slot 9152 and the second positioning hole 9143.

[0088] In order to apply glue to the positioning column 903 , in some embodiments, the storage recess 915 also includes a glue dispensing groove 9153 , which is located on one side of the storage groove 9152 , and the height of the glue dispensing groove 9153 is higher than the height of the storage groove 9152 so that the glue can penetrate into the storage groove 9152 .

[0089] In order to improve the uniformity of glue dispensing, in some embodiments, glue dispensing grooves 9153 are provided on both sides of the storage groove 9152. The glue dispensing grooves 9153 on both sides of the storage groove 9152 can be glued to make the glue on the positioning column 903 in the storage groove 9152 uniform.

[0090] In some embodiments, the storage recess 915 also includes a glue partition boss 9151, which is located between the two storage grooves 9152. Glue dispensing grooves 9153 are provided on both sides of the glue partition boss 9151. The height of the glue partition boss 9151 is greater than the height of the glue dispensing grooves 9153 to prevent the glue on one side of the glue partition boss 9151 from flowing to the other side of the glue partition boss 9151.

[0091] In some embodiments, the height of the glue on the glue dispensing groove 9153 is lower than the height of the glue isolation boss 9151 to prevent the glue on both sides of the glue isolation boss 9151 from flowing into each other. That is, after the glue on the glue dispensing groove 9153 is cured, the height of the sealing colloid on the glue dispensing groove 9153 is lower than the height of the glue isolation boss 9151.

[0092] like Fig.12As shown, in some embodiments, the fixing surface 9146 is further provided with a first limiting boss 9144, and the first limiting boss 9144 protrudes outward relative to the surface where the second lens 9142 is located. The first limiting boss 9144 is located on the side of the second positioning hole 9143 away from the second lens 9142, and the distance between the first limiting boss 9144 and the second lens 9142 is greater than the distance between the second positioning hole 9143 and the second lens 9142. The side surface of the first limiting boss 9144 and the fixing surface 9146 form a supporting groove 914, and the end face of the optical fiber bracket 902a contacts the first limiting boss 9144, and the limiting connection is achieved by glue.

[0093] In some embodiments, the first limiting boss 9144 is located at the edge of the fixing surface 9146, and the edge of the end surface of the optical fiber bracket 902a contacts the first limiting boss 9144, and a limiting connection is achieved by glue.

[0094] In some embodiments, the first limiting boss 9144 in the lens assembly 901 a extends from a side of the lens assembly 901 a facing away from the circuit board 300 to a side of the lens assembly 901 a facing the circuit board 300 .

[0095] like Fig.12 As shown, in some embodiments, the fixing surface 9146 is further provided with a second limiting boss 9145, and the second limiting boss 9145 is fixed to the side of the first limiting boss 9144 facing the optical fiber bracket 902a, so that the second limiting boss 9145 and the first limiting boss 9144 form a limiting notch, and the end edge of the optical fiber bracket 902a is clamped in the limiting notch to further realize the limiting connection between the optical fiber bracket 902a and the lens assembly 901a.

[0096] The second lens 9142, the lens assembly 901a, the supporting boss 9141, the first limiting boss 9144 and the second limiting boss 9145 may be independent structural components or components of an integrally formed structural component.

[0097] Fig.15 FIG. 4 is a structural diagram of a second lens assembly provided according to some embodiments. Fig.15 As shown, in some embodiments, the first limiting boss 9144 in the lens assembly 901b includes a first limiting boss portion 9144a and a second limiting boss portion 9144b, the first limiting boss portion 9144a and the second limiting boss portion 9144b are not connected, the first limiting boss portion 9144a extends downward from a side of the lens assembly 901b facing away from the circuit board 300, and does not extend to a side of the lens assembly 901b facing the circuit board 300, and the second limiting boss portion 9144b extends upward from a side of the lens assembly 901b facing the circuit board 300, and does not extend to a side of the lens assembly 901b facing away from the circuit board 300.

[0098] In some embodiments, the first limiting boss portion 9144a and the second limiting boss portion 9144b have the same thickness, and the first limiting boss portion 9144a and the second limiting boss portion 9144b are respectively in contact and connected with the end surface of the optical fiber bracket 902a to prevent the optical fiber carried by the optical fiber bracket 902a from deviating from the preset position.

[0099] Except that the structure of the first limiting boss 9144 is different and the lens assembly 901b does not have a second limiting boss, the other structures are the same as those of the lens assembly 901a and will not be described again here.

[0100] Fig.16 A structural diagram of another optical fiber support provided according to some embodiments. Fig.17 is a structural diagram of a third lens assembly provided according to some embodiments. Fig.18 FIG. 4 is a cross-sectional view of a third lens assembly and another optical fiber support according to some embodiments. Fig.16 , Fig.17 and Fig.18 As shown, the lens assembly 901c does not have the first limiting boss and the second limiting boss, and the other structures are the same as the lens assembly 901a, which will not be repeated here.

[0101] like Fig.16 and Fig.18 As shown, in some embodiments, a first limiting boss 926 is provided at the edge of the end face of the optical fiber bracket 902b, and the first limiting boss 926 protrudes outward relative to the end face of the optical fiber bracket 902b. The edge of the lens assembly 901c facing the optical fiber bracket 902b contacts the first limiting boss 926, and a limiting connection is achieved by glue.

[0102] In some embodiments, the first limiting boss 926 in the optical fiber bracket 902 b extends from a side of the optical fiber bracket 902 b facing away from the circuit board 300 to a side of the optical fiber bracket 902 b facing the circuit board 300 .

[0103] In some embodiments, a second limiting boss 927 is further provided on the side of the optical fiber bracket 902b facing the lens assembly 901c, and the second limiting boss 927 is fixed to the side of the first limiting boss 926 facing the lens assembly 901c, so that the second limiting boss 927 and the first limiting boss 926 form a limiting notch, and the end edge of the lens assembly 901c is clamped in the limiting notch to further realize the limiting connection between the optical fiber bracket 902b and the lens assembly 901c.

[0104] In some embodiments, except for the first limiting boss 926 and the second limiting boss 927, the other structures of the optical fiber bracket 902b are the same as those of the optical fiber bracket 902a, which will not be repeated here.

[0105] like Fig.16 As shown, in some embodiments, in addition to the first limiting boss 926 and the second limiting boss 927, the optical fiber bracket 902b is also provided with an optical fiber slot 924 and an optical fiber hole 925. The optical fiber slot 924 is located at the front end of the optical fiber bracket 902b, and the optical fiber hole 925 is located at the end of the optical fiber bracket 902b. The optical fiber slot 924 is connected to the optical fiber hole 925, and the optical fiber slot 924 has a notch facing rightward and upward so that the optical fiber 923 can be inserted into the optical fiber slot 924 and inserted into the optical fiber hole 925 through the optical fiber slot 924.

[0106] In some embodiments, a glue dispensing groove 928 is provided at the edge of the optical fiber slot 924, and glue is dispensed in the glue dispensing groove 928 so that the glue can completely seal the gap between the optical fiber and the optical fiber socket. The sealing glue is applied to the periphery of the contact between the optical fiber and the optical fiber slot, and is accumulated on the front end face of the optical fiber and the optical fiber bracket 902b. After the sealing glue is cured, a sealing colloid is formed to prevent the cooling liquid from extending into the interior of the optical fiber bracket 902b from the optical fiber socket.

[0107] In some embodiments, the optical module includes a circuit board and an optical transceiver component, and the optical transceiver component is fixed on the circuit board. Wherein, the optical transceiver component includes a lens assembly, an optical fiber bracket and a positioning column, the optical fiber bracket has a first positioning hole, the optical fiber bracket has a second positioning hole, the first positioning hole is arranged corresponding to the second positioning hole, and the fixing column is fixed to the second positioning hole and the first positioning hole to achieve alignment between the lens assembly and the optical fiber bracket. A second lens is arranged on the side of the lens assembly facing the optical fiber bracket, and the second lens is coated with an anti-reflection film to reduce reflected light. The second positioning hole is located on one side of the second lens, and the distance between the second positioning hole and the second lens is small. If a positioning column integrated with the lens assembly is arranged at the position of the second positioning hole, when the second lens is coated, the positioning column acts as a shield to affect the coating effect. Therefore, only the second positioning hole can be arranged on one side of the second lens. The second positioning hole is located on one side of the second lens, and the surface where the second lens is located is not recessed inward relative to the side of the lens assembly facing the optical fiber bracket, so as to reduce the shielding around the second lens assembly, thereby reducing the shielding effect during coating, so that the thickness of the anti-reflection film of the second lens is uniform. The lens assembly or the optical fiber holder is provided with a first limiting boss, and the lens assembly and the optical fiber holder are limitedly connected through the first limiting boss, and there is a gap between the second lens and the end face of the optical fiber carried by the optical fiber holder, so that the optical signal converged by the second lens is coupled to the optical fiber carried by the optical fiber holder. In some embodiments, the second positioning hole is located on one side of the second lens, and the surface where the second lens is located is not recessed inward relative to the side of the lens assembly facing the optical fiber holder, so as to reduce the obstructions around the second lens assembly, so that the thickness of the anti-reflection film of the second lens is uniform; the lens assembly or the optical fiber holder is provided with a first limiting boss, and the lens assembly and the optical fiber holder are limitedly connected through the first limiting boss, so that the optical signal converged by the second lens is coupled to the optical fiber carried by the optical fiber holder.

[0108] 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 it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical module, characterized in that: include: Circuit boards; An optical transceiver component is fixed on the circuit board; wherein the optical transceiver component includes a lens assembly, an optical fiber bracket and a positioning post, the optical fiber bracket has a first positioning hole, a second lens and a second positioning hole are provided on a side of the lens assembly facing the optical fiber bracket, the second positioning hole is located on one side of the second lens, the positioning post is fixed to the second positioning hole and the first positioning hole, the second lens is coated with an anti-reflection film, and the surface where the second lens is located is not recessed inward relative to a side of the lens assembly facing the optical fiber bracket; the lens assembly or the optical fiber bracket is provided with a first limiting boss, the lens assembly and the optical fiber bracket are limitedly connected by the first limiting boss, and there is a gap between the second lens and the end face of the optical fiber carried by the optical fiber bracket.

2. The optical module according to claim 1, characterized in that: The surface where the second lens is located protrudes outward relative to a surface of the lens assembly facing the optical fiber support.

3. The optical module according to claim 1, characterized in that: A first limiting boss is provided on the edge of a side of the lens assembly facing the optical fiber holder, the first limiting boss is located on the side of the second positioning hole away from the second lens, and the first limiting boss extends downward from the upper surface of the lens assembly to the lower surface of the lens assembly; a second limiting boss is provided on the side of the first limiting boss facing the optical fiber holder, the second limiting boss and the first limiting boss form a limiting notch; the optical fiber holder is clamped at the limiting notch.

4. The optical module according to claim 1, characterized in that: A first limiting boss is provided on the edge of a side of the lens assembly facing the optical fiber bracket, the first limiting boss is located on the side of the second positioning hole away from the second lens, the first limiting boss includes a first limiting boss portion and a second limiting boss portion, the first limiting boss portion extends downward from the upper surface of the lens assembly but not to the lower surface of the lens assembly, the second limiting boss portion extends upward from the lower surface of the lens assembly but not to the upper surface of the lens assembly, the first limiting boss portion and the second limiting boss portion are arranged opposite to each other, and the first limiting boss portion and the second limiting boss portion are not connected.

5. The optical module according to claim 1, characterized in that: A first limiting boss is arranged on the edge of a side of the optical fiber holder facing the lens assembly, and the first limiting boss extends downward from the upper surface of the optical fiber holder to the lower surface of the optical fiber holder; a second limiting boss is arranged on the side of the first limiting boss facing the lens assembly, and the second limiting boss and the first limiting boss form a limiting notch; the lens assembly is clamped at the limiting notch.

6. The optical module according to claim 1, characterized in that: A light port groove is provided on the side of the lens assembly facing away from the circuit board, a storage recess is provided behind the light port groove, a positioning column and a sealing colloid are placed in the storage recess, the gap between the positioning column and the storage recess is filled with sealing colloid, and the gap between the positioning column and the second positioning hole is also filled with sealing colloid.

7. The optical module according to claim 6, characterized in that: The storage recess includes a storage groove, a glue dispensing groove and a glue isolation boss. The storage groove is connected to the second positioning hole. The positioning column is fixed to the storage groove and the second positioning column. The glue dispensing groove is located on one side of the storage groove. The height of the glue dispensing groove is higher than the height of the storage groove. The glue isolation boss is located between the two storage grooves. The height of the glue isolation boss is higher than the height of the glue dispensing groove.

8. An optical module, characterized in that: include: Circuit boards; An optical transceiver component is fixed on the circuit board; wherein the optical transceiver component includes a lens assembly, an optical fiber bracket and a positioning column, the optical fiber bracket has a first positioning hole, and a second lens and a second positioning hole are provided on a side of the lens assembly facing the optical fiber bracket, the second positioning hole is located on one side of the second lens, the positioning column is fixed to the first positioning hole and the second positioning hole, the second lens is coated with an anti-reflection film, and the second lens is fixed to the lens assembly through a supporting boss; the lens assembly or the optical fiber bracket is provided with a first limiting boss, the lens assembly and the optical fiber bracket are limitedly connected by the first limiting boss, and there is a gap between the second lens and the end face of the optical fiber carried by the optical fiber bracket.

9. The optical module according to claim 8, characterized in that: The thickness of the supporting boss is greater than or equal to zero.

10. The optical module according to claim 8, characterized in that: A light port groove is provided on the side of the lens assembly facing away from the circuit board, a storage recess is provided behind the light port groove, a positioning column and a sealing colloid are placed in the storage recess, the gap between the positioning column and the storage recess is filled with sealing colloid, and the gap between the positioning column and the second positioning hole is also filled with sealing colloid.

Images