Lens with adjustable optical power, optical module and preparation method thereof

Abstract

The invention discloses an optical power adjustable lens, an optical module and a preparation method thereof, and belongs to the technical field of optical communication, the optical power adjustable lens comprises a lens main body and a reflecting surface arranged on the lens main body, the reflecting surface is provided with a first converging lens along a first direction, and a first module is arranged in the first direction or a second direction relative to the reflecting surface; the reflecting surface, the first module and the first converging lens are all located on a light transmission path, and the light transmittance of the first module is adjustable. According to the optical power adjustable lens, the first module is arranged on the optical transmission path, and the optical power received by the photoelectric assembly in the optical module is changed by adjusting the light transmittance of the first module, so that the optical power is adjustable; and after the optical module is assembled and cured, an operator can adjust the optical power of the optical module to a set range by adjusting the optical module of the first module, so that the yield of an optical module product is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical communications, and in particular relates to an optical power adjustable lens, an optical module and a preparation method thereof. Background Art

[0002] Optical modules are usually composed of optoelectronic devices, functional circuits, and optical interfaces. Optoelectronic devices include a transmitter and a receiver. The transmitter is used to convert electrical signals into optical signals, and the receiver is used to convert optical signals into electrical signals. In the process of transmitting and receiving signals, the lens structure is particularly important for optoelectronic devices, which are mainly used for focusing, beam shaping, and correction of optical signals.

[0003] During the installation of the optical module, it is usually necessary to install each device to the set position, couple the devices to determine the optimal output optical power, and then use glue to cure, bake, and temperature cycle the devices to obtain it. During this process, the glue shrinks due to curing, baking, and temperature cycling, which will cause the output optical power of the molded optical module to deviate from the set coupling optical power to a certain extent, ultimately making it difficult to debug the optical module, reducing performance, and affecting product yield. Summary of the invention

[0004] In response to one or more of the above defects or improvement needs in the prior art, the present invention provides a lens with adjustable optical power to solve the problem of deviation in the output optical power of the existing optical module after curing, and the problem of inconsistent output optical power of a large number of optical modules produced on a large scale.

[0005] To achieve the above object, the present invention provides an optical power adjustable lens, comprising: A lens body, a reflective surface arranged on the lens body, which is equivalent to a first converging lens arranged along a first direction on the reflective surface, the first converging lens is used to couple optoelectronic components, and a first module arranged along the first direction or along the second direction relative to the reflective surface, the reflective surface, the first module and the first converging lens are all located on the light transmission path of the optical power adjustable lens, the transmittance of the first module is adjustable, and the first direction and the second direction are two directions on the light transmission path.

[0006] As a further improvement of the present invention, a first electrode and a second electrode are respectively provided on both sides of the first module, and the first module has different light transmittances after different action times when different voltages, temperatures or magnetic fields are applied.

[0007] As a further improvement of the present invention, the first module includes one or more of crystal, amorphous, liquid crystal, magnetic material or photoelectric material, and the transmittance of the first module remains unchanged after the applied voltage, temperature or magnetic field is removed.

[0008] As a further improvement of the present invention, the first module is made of a conductive material, and the first electrode and the second electrode are both spaced apart from the first module.

[0009] As a further improvement of the present invention, the first module is made of insulating material, and the first electrode and / or the second electrode may be arranged adjacent to the first module.

[0010] As a further improvement of the present invention, the projections of the first electrode and the second electrode perpendicular to the light transmission path cover the projection of the first module perpendicular to the light transmission path; Alternatively, an effective area of ​​the first electrode and the second electrode on the first module is larger than an effective area of ​​the first module on the light transmission path.

[0011] As a further improvement of the present invention, the shape of the first electrode and / or the second electrode matches the shape of the first module.

[0012] As a further improvement of the present invention, the first electrode is a positive electrode, and the second electrode is a negative electrode.

[0013] As a further improvement of the present invention, the first module is an electrically variable material, and the first electrode and the second electrode are arranged at positions matching the first module.

[0014] As a further improvement of the present invention, the first module is symmetrically arranged along the optical axis of the first converging lens, and the first electrode and the second electrode are symmetrically arranged on both sides of the first module along the optical axis of the first converging lens.

[0015] As a further improvement of the present invention, the first module is arranged between the reflection surface and the first converging lens along a first direction, and the first electrode and the second electrode are arranged on both sides of the first module along a second direction.

[0016] As a further improvement of the present invention, the first module is arranged on one side of the reflective surface along the second direction, and the first electrode and the second electrode are arranged on both sides of the first module along the first direction.

[0017] As a further improvement of the present invention, a plurality of first modules are arranged at intervals along the third direction, a plurality of first converging lenses are arranged along the third direction, and each of the first converging lenses is arranged in a one-to-one correspondence with each of the first modules.

[0018] As a further improvement of the present invention, a plurality of the first electrodes and the second electrodes are arranged at intervals along the third direction, and each of the first electrodes and the second electrodes is arranged in a one-to-one correspondence with each of the first modules.

[0019] As a further improvement of the present invention, it further comprises a second converging lens, which is arranged on one side of the reflecting surface along the second direction and is used for coupling with the optical fiber.

[0020] As a further improvement of the present invention, the length of the first module along the second direction is greater than the clear aperture of the light transmission path.

[0021] As a further improvement of the present invention, the length of the first module along the first direction is greater than the clear aperture of the light transmission path.

[0022] As a further improvement of the present invention, the first electrode and the second electrode are respectively connected with leads, and the leads are used to transmit external electricity, heat or magnetic field to the first module to change the transmittance of the first module, and the leads at least partially expose the end face of the lens body.

[0023] As a further improvement of the present invention, the lead is a conductive wire.

[0024] As a further improvement of the present invention, the first converging lens, the first reflecting surface and the first module are integrally formed with light-transmitting material.

[0025] As a further improvement of the present invention, the second converging lens and the first module are integrally formed with light-transmitting material.

[0026] As a further improvement of the present invention, the optical power adjustable lens is integrally formed.

[0027] As a further improvement of the present invention, the first module is a doped region in the light-transmitting material, and the first module is formed by doping one or more of crystal, amorphous, liquid crystal, magnetic material or photoelectric material in the light-transmitting material.

[0028] The present application also includes an optical module, which includes: A PCB board, an optoelectronic component and at least one of the optical power adjustable lenses, wherein the optoelectronic component is arranged on the PCB board for photoelectric conversion, and the optoelectronic component is arranged along a first direction on a side of the first converging lens away from the reflecting surface.

[0029] As a further improvement of the present invention, the optical power adjustable lens includes an optical port, which is arranged on one side of the second converging lens along the second direction and is used for connecting to the optical fiber jumper.

[0030] As a further improvement of the present invention, it also includes an optical fiber, one end of which is coupled to the optical power adjustable lens, and the other end of which is used to connect to the optical fiber jumper.

[0031] The present application also includes a method for preparing an optical module, which is used for preparing the optical module, and comprises the following steps: S1, mounting the optoelectronic components, mounting the optoelectronic components on the preset position of the PCB board; S2, mounting the optical power adjustable lens on the PCB board to obtain a PCBA assembly; S3, temperature cycle test, placing at least one of the PCBA components in a preset high and low temperature alternating environment for reliability testing; S4, optical power adjustment, for one, part or all of the PCBAs, power-on adjustment is performed so that the optical power of the optical power adjustable lens meets the design requirements.

[0032] As a further improvement of the present invention, mounting the optical power adjustable lens in step S2 includes the following steps: S201, power on the PCB board; S202, monitoring the optical power of the optical module, and determining the mounting position of the optical power adjustable lens on the PCB board; S203, using glue to assemble the optical power adjustable lens to a set position of the PCB board; S204, curing glue.

[0033] As a further improvement of the present invention, the optical power adjustment in step S4 includes the following steps: S401, energizing the optical module and the first electrode and the second electrode on both sides of the first module; S402, monitor the optical power of the optical module. When the monitored optical power is within the set range, there is no need to adjust the voltage. When the optical power received by the optoelectronic component is not within the set range, adjust the voltage and / or voltage application time until the monitored optical power is within the set range, and then disconnect the power supply to the first electrode and the second electrode.

[0034] As a further improvement of the present invention, the powering on of the PCB board in step S201 further includes: fixing the optical fiber in the optical power adjustable lens.

[0035] As a further improvement of the present invention, it also includes: S5. Install the housing and encapsulate the PCBA in the optical module housing.

[0036] The present application also includes an active cable, which includes a transmitting end, a receiving end and an optical fiber connecting the transmitting end and the receiving end, the transmitting end and the receiving end both include a PCB board and an optoelectronic component, and at least one of the transmitting end and the receiving end includes the optical power adjustable lens.

[0037] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0038] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects: (1) The optical power adjustable lens of the present invention realizes optical power adjustment by setting a first module on the optical transmission path of the lens and adjusting the light transmittance of the first module to change the optical power received by the optoelectronic components in the optical module. After the optical module is assembled and cured, the operator can adjust the optical power of the optical module within the set range by adjusting the light transmittance of the first module [a1], thereby reducing the difficulty of optical module preparation and improving the yield of optical module products.

[0039] (2) The optical power adjustable lens of the present invention is achieved by arranging a first electrode and a second electrode on both sides of a first module, applying current, temperature and / or magnetic field to the first module by energizing the two electrodes to change the transmittance of the first module, thereby adjusting the optical power of the lens.

[0040] (3) The optical power adjustment method of the optical module of the present invention assembles the optical device through conventional processes, assembles the first optoelectronic component, the optical power adjustable lens and the second optoelectronic component to the PCB board and solidifies, and then energizes the first electrode and the second electrode and adjusts the voltage to achieve the light transmittance adjustment of the first module. When the optical power received by the first optoelectronic component reaches the set range, the optical power adjustment of the optical module is completed. The adjustment method will not affect the installation and commissioning of the original optical module as a whole. It only needs to energize the electrodes after the assembly is completed to achieve the purpose of optical power adjustment. The overall structure is simple and the adjustment method is convenient, which can greatly improve the yield and consistency of the optical module. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic diagram of the overall structure of the optical power adjustable lens in an embodiment of the present invention; Figure 2 is a schematic diagram of the cross-sectional structure of an optical power adjustable lens in an embodiment of the present invention; Figure 3 is a schematic structural diagram of a PCB board in an embodiment of the present invention; Figure 4 It is a schematic flow chart of a method for preparing an optical module in an embodiment of the present invention.

[0042] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. Lens body; 2. Reflection surface; 3. First converging lens; 4. First module; 5. First electrode; 6. Second electrode; 7. Lead wire; 8. Second converging lens; 9. PCB board; 10. Signal processor; 11. Gold finger. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] In the description of the present invention, it should be understood that, unless otherwise specified, terms such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0045] In addition, unless otherwise specified, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] Example: See also Figures 1 to 4 The optical power adjustable lens in the embodiment of the present invention includes a lens body 1, a reflective surface 2 is provided on the lens body 1, and a first converging lens 3 is provided on the reflective surface 2 along a first direction, and the first converging lens 3 is mainly used for coupling optoelectronic components; at the same time, relative to the reflective surface 2, a first module 4 is provided in the first direction or the second direction, and the reflective surface 2, the first module 4 and the first converging lens 3 are all located on the optical transmission path of the optical power adjustable lens, the transmittance of the first module 4 is adjustable, and the first direction and the second direction are two directions on the optical transmission path. Specifically, the optical power adjustable lens in the present application adds a first module 4 on its optical transmission path, and the transmittance of the first module 4 can be adjusted accordingly, so that the intensity of the optical signal passing through the optical power adjustable lens can be correspondingly variable, thereby achieving adjustable optical power received by the optical receiving component, ensuring that the optical power of the finally prepared optical module is within the set range, which can greatly improve the yield and consistency of the optical module.

[0049] Furthermore, the optical transmission path in the present application refers to the path of the optical signal emitted from the optical transmitting component, entering the interior of the lens body 1, being transmitted to the reflecting surface 2, being reflected by the reflecting surface 2, and then passing through the first module 4, and finally being emitted to the optical receiving component. The first direction in the present application is preferably the arrangement direction of the optical power adjustable lens and the laser, and is also the thickness direction of the optical module housing; the second direction is preferably the plugging direction of the receiving optical fiber in the optical module, and is also the length direction of the PCB board 9 in the horizontal direction; the third direction is preferably the width direction of the PCB board 9 in the horizontal direction.

[0050] Further, as an optional embodiment of the present invention, the first module 4 in the present application is provided with a first electrode 5 and a second electrode 6 on both sides, and the first module 4 will obtain different light transmittances when different voltages, temperatures and / or magnetic fields are applied, and optionally after different action times. The present application selects materials with different light transmittances under the action of voltage, temperature and / or magnetic field as the first module 4, and forms different voltages, temperatures and / or magnetic fields through the first electrode 5 and the second electrode 6 to act on the first module 4 for a period of time, so as to achieve a change in the light transmittance of the first module 4, and then adjust the optical power of the lens.

[0051] Further, as an optional embodiment of the present invention, the first module 4 in the present application includes one or more of crystal, amorphous, liquid crystal, magnetic material or photoelectric material, and the transmittance of the first module 4 remains unchanged after the applied voltage, temperature or magnetic field is removed. When the first module 4 in the present application is crystal, amorphous or liquid crystal, under the electric field and thermal action of the first electrode 5 and the second electrode 6, the first module 4 changes from an amorphous state to a crystalline state, and its light transmittance property changes accordingly, thereby realizing the adjustment of the optical power output. When the first module 4 is a magnetic material, under the electric field of the first electrode 5 and the second electrode 6, the disordered magnetic material particles in the first module 4 become ordered under the electric field, and its light transmittance property changes accordingly, thereby realizing the adjustment of the optical power output. When the first module 4 is a crystalline material or a photoelectric material, the first electrode 5 and the second electrode 6 conduct electricity and generate heat, the lattice structure and electronic state of the crystalline material change accordingly, and its light transmittance property changes accordingly, thereby realizing the adjustment of the optical power output. At the same time, when the first module 4 is a photoelectric material, if the change in the transmittance of the photoelectric material is related to the electrode direction, the arrangement positions of the first electrode 5 and the second electrode 6 need to be adjusted accordingly. When the first module 4 is an amorphous material, the first electrode 5 and the second electrode 6 conduct electricity and generate heat, the temperature rises, the molecular motion in the amorphous material intensifies, the material structure is loose, and the scattering effect of light is enhanced, thereby changing the transmittance and achieving the adjustment of the optical power output. At the same time, the transmittance of the first module 4 remains unchanged after the applied voltage, temperature or magnetic field is revoked. Since there is a magnetic field in the use environment of the optical module, and there are problems such as temperature rise and voltage change in the PCBA during operation, in order to ensure that the transmittance of the first module 4 remains stable, the first module 4 in this application is prepared using a material whose transmittance remains unchanged after the applied voltage, temperature or magnetic field is revoked.

[0052] As an optional embodiment of the present invention, the transmittance of the first module 4 in the present application is adjustable in real time as the voltage at both ends of the first electrode 5 and the second electrode 6 changes, so that the transmittance of the first module 4 can be adjusted on site by the user. In addition to adjusting the transmittance of the first module 4 once by voltage, temperature or magnetic field, the present application can also select a material with adjustable transmittance in real time as the first module 4. Correspondingly, when the transmittance of the first module 4 is adjustable in real time, in order to avoid the influence of the heat generated by the optical module itself and the magnetic field on the transmittance, the transmittance of the first module 4 is adjustable when voltage is applied. When the transmittance of the first module 4 needs to be adjusted, the transmittance of the first module 4 is adjustable in real time by energizing the first electrode 5 and the second electrode 6 and controlling the voltage thereof.

[0053] Further, as an optional embodiment of the present invention, the first module 4 in the present application is a conductive material, and the first electrode 5 and the second electrode 6 are both spaced apart from the first module 4. The first electrode 5 and the second electrode 6 in the present application are conductors. When the first module 4 is a conductive material, the first electrode 5 and / or the second electrode 6 contact the first module 4, which may cause a short circuit problem. Therefore, the first electrode 5 and the second electrode 6 need to be spaced apart from the first module 4 to ensure that the first electrode 5, the first module 4 and the second electrode 6 are not connected.

[0054] Further, as an optional embodiment of the present invention, the first module 4 in the present application is an insulating material, and the first electrode 5 and / or the second electrode 6 can be arranged adjacent to the first module 4. Since the optical power adjustable lens itself is small in size, it is difficult to set the first module 4, the first electrode 5 and the second electrode 6, and it is necessary to reserve enough space between the first module 4 and the first electrode 5 and the second electrode 6 to avoid short circuit problems. Based on this, the present application can select an insulating material as the first module 4, so that the first electrode 5 and / or the second electrode 6 can be arranged adjacent to the first module 4, thereby reducing the difficulty of preparing the optical power adjustable lens.

[0055] Further, as an optional embodiment of the present invention, the projections of the first electrode 5 and the second electrode 6 in the present application perpendicular to the light transmission path cover the projection of the first module 4 perpendicular to the light transmission path. The first electrode 5 and the second electrode 6 in the present application are on both sides of the light transmission path. When the projections of the first electrode 5 and the second electrode 6 perpendicular to the light transmission path cover the projection of the first module 4 perpendicular to the light transmission path, the voltage, temperature or magnetic field generated by the first electrode 5 and the second electrode 6 can act on the entire area of ​​the first module 4, so that the transmittance of the first module 4 changes uniformly to ensure the accuracy of optical power regulation.

[0056] As another optional embodiment of the present invention, in the present application, the effective area of ​​the first electrode 5 and the second electrode 6 on the first module 4 is larger than the effective area of ​​the first module 4 on the light transmission path. The present application may also select other first electrodes 5 and second electrodes 6 that can cover the entire effective area of ​​the first module 4 on the light transmission path. In this case, the first electrode 5 and the second electrode 6 are not limited to covering the entire first module 4, as long as it is ensured that the voltage, temperature or magnetic field generated subsequently can act on the entire area of ​​the first module 4.

[0057] Further, as an optional embodiment of the present invention, the shape of the first electrode 5 and / or the second electrode 6 in the present application matches the shape of the first module 4. In order to ensure that the voltage, temperature or magnetic field generated by the first electrode 5 and the second electrode 6 basically covers the entire area of ​​the first module 4, the shapes of the first electrode 5, the second electrode 6 and the first module 4 are matched. For example, when the first module 4 is a square column structure, the first electrode 5 and the second electrode 6 are correspondingly square sheet structures. Of course, the first electrode 5, the second electrode 6 and the first module 4 can also adopt other shapes or structures that match each other.

[0058] Further, as an optional embodiment of the present invention, the first electrode 5 in the present application is a positive electrode, and the second electrode 6 is a negative electrode. The voltage, temperature or magnetic field is generated by the action of the two to change the transmittance of the first module 4. Optionally, the first electrode 5 and the second electrode 6 in the present application can also be both positive or negative electrodes, so as to adjust the transmittance of the first module 4.

[0059] Further, as an optional embodiment of the present invention, the first module 4 in the present application is an electrically variable material, and the first electrode 5 and the second electrode 6 are arranged at positions that match the first module 4. When the first module 4 in the present application uses an electrically variable material, the positions of the first electrode 5 and the second electrode 6 need to be matched with the first module 4 to ensure that the voltage generated by the first electrode 5 and the second electrode 6 acts on the first module 4, thereby adjusting the light transmittance of the first module 4.

[0060] Further, as an optional embodiment of the present invention, the first module 4 in the present application is symmetrically arranged along the optical axis of the first converging lens 3, and the first electrode 5 and the second electrode 6 are symmetrically arranged on both sides of the first module 4 along the optical axis of the first converging lens 3. In order to ensure that the first module 4 can cover the transmission path of the optical transceiver assembly, the first module 4 in the present application is symmetrically arranged along the optical axis of the first converging lens 3, and the first electrode 5 and the second electrode 6 are symmetrically arranged on both sides of the first module 4 along the optical axis of the first converging lens 3, so as to ensure that the first electrode 5 and the second electrode 6 act on the first module 4 substantially at the same time, so as to achieve accurate adjustment of the light transmittance of the first module 4.

[0061] Further, as an optional embodiment of the present invention, the first module 4 in the present application is arranged between the reflection surface 2 and the first converging lens 3 along the first direction, and the first electrode 5 and the second electrode 6 are arranged on both sides of the first module 4 along the second direction. Optionally, the first module 4 in the present application is arranged on one side of the reflection surface 2 along the second direction, and the first electrode 5 and the second electrode 6 are arranged on both sides of the first module 4 along the first direction. The lens body 1 in the present application is provided with a first converging lens 3 and an optional second converging lens 8, which are respectively located in the first direction and the second direction relative to the reflection surface, and are used to cooperate with the optical emitting component and the optical receiving component. The first module 4 only needs to be arranged on the optical transmission path, so it can be arranged between the reflection surface 2 and the first converging lens 3, or between the reflection surface 2 and the second converging lens 8. The first electrode 5 and the second electrode 6 are arranged on both sides of the first module 4 accordingly, and will not interfere with the optical transmission path. The second converging lens 8 in the present application is arranged on one side of the reflection surface 2 along the second direction, and is used to couple with the optical fiber.

[0062] Further, as an optional embodiment of the present invention, when the first module 4 is arranged between the reflective surface 2 and the first converging lens 3, the length of the first module 4 in the present application along the second direction is greater than the clear aperture of the optical transmission path, and at this time, the first module completely covers the optical transmission path, so that the optical power of the optical power adjustable lens is changed accordingly. When the first module 4 is arranged between the reflective surface 2 and the second converging lens 8, the length of the first module 4 along the first direction is correspondingly greater than the clear aperture on the optical transmission path.

[0063] Further, as an optional embodiment of the present invention, the first modules 4 in the present application are arranged in plurality along the third direction at intervals, and the first converging lenses 3 are arranged in plurality along the third direction, and each first converging lens 3 is arranged in one-to-one correspondence with the first module 4. Further, the first electrodes 5 and the second electrodes 6 in the present application are arranged in plurality along the third direction at intervals, and each first electrode 5, second electrode 6 is arranged in one-to-one correspondence with each first module 4. The optical power adjustable lens in the present application can arrange multiple optical transmission paths at the same time, and in this case, multiple first modules 4 and multiple first converging lenses 3 need to be arranged correspondingly. Accordingly, in order to make the transmittance of each first module 4 adjustable, each first module 4 also needs to be provided with a first electrode 5 and a second electrode 6 correspondingly.

[0064] Further, as an optional embodiment of the present invention, the first electrode 5 and the second electrode 6 in the present application are respectively connected with a lead 7, which is used to transmit external power, heat or magnetic field to the first module 4 to change the transmittance of the first module 4 accordingly, and the lead 7 at least partially exposes the end face of the lens body 1 to connect with an external device. The first electrode 5 and the second electrode 6 in the present application can be used as the transmission body of the above-mentioned power, heat or magnetic field to introduce external power, heat or magnetic field to both sides of the first module 4 through the lead 7 to change the transmittance of the first module 4.

[0065] Optionally, the lead 7 is a wire, and external power is introduced into the first electrode 5 and the second electrode 6 through the wire, and heat or magnetic field is generated by the first electrode 5 and the second electrode 6 to change the transmittance of the first module 4. Optionally, during the actual adjustment of the optical power, the transmittance can be adjusted by setting a pin on the end face of the lens body 1 and connecting the pin to the power supply module of the optical module.

[0066] Further, as an optional embodiment of the present invention, the first converging lens 3, the first reflecting surface 2 and the first module 4 in the present application are integrally formed with a light-transmitting material. Alternatively, the second converging lens 8 and the first module 4 in the present application are integrally formed with a light-transmitting material. The present application can integrally form the first converging lens 3 and the first module 4 or the second converging lens 8 and the first module 4 along the first optical path or the second optical path, so as to facilitate the overall forming of the optical power adjustable lens. Optionally, the optical power adjustable lens in the present application can be formed using an integral forming technology.

[0067] Further, as an optional embodiment of the present invention, the first module 4 in the present application is a doped region in a light-transmitting material, and the first module 4 is formed by doping one or more of crystals, amorphous materials, liquid crystals, magnetic materials, or photoelectric materials in the light-transmitting material. In addition to using an embedded form to embed the first module 4 into the lens body 1, the present application can also use a doping form to dope part of the crystals, amorphous materials, liquid crystals, magnetic materials, or photoelectric materials into the light-transmitting material to form a first module 4 region with variable transmittance in the lens body 1.

[0068] Furthermore, the present application also includes an optical module, which includes: a PCB board 9, an optoelectronic component and at least one of the above-mentioned adjustable optical power lenses, and the optoelectronic component is arranged on the PCB board 9 for photoelectric conversion, and the optoelectronic component is arranged along the first direction on a side of the first converging lens 3 away from the reflecting surface 2. Through the adjustable optical power lens, the optical power in the optical module can be correspondingly adjustable to match the actual needs of the optical module.

[0069] Optionally, a digital signal processor (DSP) 10 is also provided on the PCB board 9, and a gold finger 11 is provided at the end of the PCB board 9. The signal processor 10 is used to control the overall operation of the optical module, and to control the voltage of the first electrode 5 and the second electrode 6 when necessary; the gold finger 11 is mainly used to connect the optical module to the power supply module. Optionally, the gold finger 11 is also connected to the lead 7.

[0070] Furthermore, the optical module adjustable lens includes an optical port, which is arranged on one side of the second converging lens 8 along the second direction, and is used to connect with the optical fiber jumper. In order to facilitate the setting of the optical fiber jumper, the optical port is arranged at the receiving port of the second converging lens 8 to facilitate the plugging and fixing of the optical fiber and ensure the stability of the optical signal transmission.

[0071] Furthermore, the optical module in the present application also includes an optical fiber, one end of which is plugged into the optical port for coupling with the optical power adjustable lens, and the other end of which is connected to the optical fiber jumper.

[0072] Furthermore, with respect to the above optical module, the present application also includes a method for preparing the optical module, which includes the following steps: S1, mounting the optoelectronic component, mounting the optoelectronic component on a preset position of the PCB board 9; S2, mounting the optical power adjustable lens on the PCB board 9 to obtain a PCBA assembly; S3, temperature cycle test, placing at least one PCBA component in a preset high and low temperature alternating environment for reliability testing; S4. Optical power adjustment: power-on adjustment is performed on one, part or all of the PCBA components so that the optical power of the optical power adjustable lens meets the design requirements.

[0073] Specifically, the preparation method of the optical module in the present application is that after the optoelectronic component is mounted to the set position of the PCB board 9, the optical power adjustable lens is mounted on the PCB board 9, and then the temperature cycle test can be performed to complete the aging test of the optoelectronic component. During the temperature cycle test, the components and the changes between the components are released to ensure the installation stability of the optoelectronic component, the optical power adjustable lens and the PCB board 9. Finally, the optical power of the optical power adjustable lens is adjusted and corrected to complete the preparation of the optical module. Compared with the conventional optical module preparation, the preparation method of the optical module in the present application puts the temperature cycle test step in front. The temperature cycle test is a product mass production verification process. In order to improve production efficiency, reliability tests are generally performed for multiple products at the same time. At least one PCBA is placed in a high and low temperature environment for reliability testing. The transmittance of the lens can be adjusted after the optical module is finalized, so that the optical module meets the set optical power requirements. It avoids the high matching accuracy of conventional optical modules during assembly, and avoids the problems of component offset caused by conventional optical modules when they are finalized with glue, ensuring the efficiency, accuracy and consistency of optical module preparation. It is understandable that conventional temperature cycle tests use batches of products for aging tests, while this solution uses semi-finished PCBAs in the preparation process for testing, which not only simplifies the subsequent optical power adjustment steps, but also ensures the product yield.

[0074] Further, as an optional embodiment of the present invention, mounting the optical power adjustable lens in step S2 of the present application specifically includes the following steps: S201, power on the PCB board 9; S202, monitoring the optical power of the optical module, and determining the mounting position of the optical power adjustable lens on the PCB board 9; S203, using glue to assemble the optical power adjustable lens to the set position of the PCB board 9; S204, curing glue.

[0075] When the optical power adjustable lens is mounted on the PCB board 9, the optical power of the lens is allowed to deviate within a certain range, and the optical power of the lens can be adjusted subsequently by energizing the first electrode 5 and the second electrode 6.

[0076] Furthermore, the optical power adjustment in step S4 of the present application includes the following steps: S401, energizing the optical module and the first electrode 5 and the second electrode 6 on both sides of the first module; S402, monitor the optical power of the optical module. When the monitored optical power is within the set range, there is no need to adjust the voltage. When the optical power received by the optoelectronic component is not within the set range, adjust the voltage and / or voltage application time until the monitored optical power is within the set range, and disconnect the power supply to the first electrode 5 and the second electrode 6.

[0077] Optionally, the transmittance of the optical power adjustable lens is adjusted in real time. In this case, the optical module, the first electrode 5 and the second electrode 6 need to be energized at the same time. The transmittance is adjusted by controlling the voltage size and / or the voltage application time of the first electrode 5 and the second electrode 6. The optical module and the optical power adjustable lens are matched in real time to ensure that the adjusted optical module meets the set requirements.

[0078] Furthermore, the powering on of the PCB board 9 in step S201 of the present application also includes: fixing the optical fiber in a lens with adjustable optical power.

[0079] Further, as an optional embodiment of the present invention, the present application also includes step S5: installing the housing to encapsulate the PCBA in the optical module housing.

[0080] As an optional embodiment of the present invention, the present application also includes an active cable, which includes a transmitting end, a receiving end, and an optical fiber connecting the transmitting end and the receiving end, the transmitting end and the receiving end both include a PCB board 9, an optoelectronic component, and at least one of the transmitting end and the receiving end includes the above-mentioned optical power adjustable lens.

[0081] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lens with adjustable optical power, characterized in that: include: A lens body, a reflective surface arranged on the lens body, which is equivalent to the reflective surface being provided with a first converging lens along a first direction, and the first converging lens is used for coupling optoelectronic components; The first module is arranged along the first direction or the second direction relative to the reflecting surface, the reflecting surface, the first module and the first converging lens are all located on the light transmission path of the optical power adjustable lens, the transmittance of the first module is adjustable, and the first direction and the second direction are two directions on the light transmission path.

2. The optical power adjustable lens according to claim 1, characterized in that: A first electrode and a second electrode are respectively arranged on both sides of the first module, and the first module has different light transmittances after different action times when different voltages, temperatures or magnetic fields are applied; The first module includes one or more of crystal, amorphous, liquid crystal, magnetic material or photoelectric material, and the light transmittance of the first module remains unchanged after the applied voltage, temperature or magnetic field is removed.

3. The optical power adjustable lens according to claim 1 or 2, characterized in that: The projections of the first electrode and the second electrode perpendicular to the light transmission path cover the projection of the first module perpendicular to the light transmission path; Alternatively, an effective area of ​​the first electrode and the second electrode on the first module is larger than an effective area of ​​the first module on the light transmission path.

4. The optical power adjustable lens according to claim 2 or 3, characterized in that: The first module is symmetrically arranged along the optical axis of the first converging lens, and the first electrode and the second electrode are symmetrically arranged on both sides of the first module along the optical axis of the first converging lens.

5. The optical power adjustable lens according to any one of claims 1 to 4, characterized in that: A plurality of the first modules are arranged at intervals along the third direction, a plurality of the first converging lenses are arranged along the third direction, and each of the first converging lenses is arranged in a one-to-one correspondence with each of the first modules.

6. The optical power adjustable lens according to any one of claims 1 to 5, characterized in that: It also includes a second converging lens, which is arranged on one side of the reflecting surface along the second direction and is used for coupling with the optical fiber.

7. The optical power adjustable lens according to any one of claims 1 to 6, characterized in that: The first electrode and the second electrode are respectively connected with leads, and the leads are used to transmit external electricity, heat or magnetic field to the first module to change the transmittance of the first module. The leads at least partially expose the end face of the lens body.

8. An optical module, characterized in that: include: A PCB board, an optoelectronic component and at least one optical power adjustable lens according to any one of claims 1 to 7, wherein the optoelectronic component is arranged on the PCB board for photoelectric conversion, and the optoelectronic component is arranged along a first direction on a side of the first converging lens away from the reflecting surface.

9. A method for preparing an optical module, used for preparing the optical module according to claim 8, characterized in that: The steps include: S1, mounting the optoelectronic components, mounting the optoelectronic components on the preset position of the PCB board; S2, mounting the optical power adjustable lens on the PCB board to obtain a PCBA assembly; S3, temperature cycle test, placing at least one of the PCBA components in a preset high and low temperature alternating environment for reliability testing; S4, optical power adjustment, for one, part or all of the PCBAs, power-on adjustment is performed so that the optical power of the optical power adjustable lens meets the design requirements.

10. The method for preparing an optical module according to claim 9, characterized in that: The optical power adjustment in step S4 includes the following steps: S401, energizing the optical module and the first electrode and the second electrode on both sides of the first module; S402, monitor the optical power of the optical module. When the monitored optical power is within the set range, there is no need to adjust the voltage. When the optical power received by the optoelectronic component is not within the set range, adjust the voltage and / or voltage application time until the monitored optical power is within the set range, and then disconnect the power supply to the first electrode and the second electrode.

Images