CN108513425B - Optical module - Google Patents
Optical module Download PDFInfo
- Publication number
- CN108513425B CN108513425B CN201810276067.6A CN201810276067A CN108513425B CN 108513425 B CN108513425 B CN 108513425B CN 201810276067 A CN201810276067 A CN 201810276067A CN 108513425 B CN108513425 B CN 108513425B
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- China
- Prior art keywords
- positioning
- laser
- light
- lens assembly
- optical
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0274—Optical details, e.g. printed circuits comprising integral optical means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
Abstract
The invention relates to the technical field of optical fiber communication, in particular to an optical module, which comprises: the laser positioning device comprises a printed circuit board, a laser is fixed on the surface of the printed circuit board, a positioning support is also fixedly arranged on the surface of the printed circuit board, and a lens assembly is fixedly arranged on the positioning support; the bottom of the lens component is provided with an accommodating groove for accommodating the positioning bracket; a first positioning piece is arranged in the positioning support, and a second positioning piece butted with the first positioning piece is arranged in the accommodating groove at the bottom of the lens component; the lens component is internally provided with an optical part, the optical part is aligned with the light emitting surface of the laser, and the optical part is emitted from the light outlet of the lens component after changing the propagation direction of the light emitted by the laser; the positioning support is matched and fixed with the lens assembly, so that the lens assembly can be precisely superposed with the light emitting surface of the laser, the light transmission effect is effectively ensured, the laser does not need to be started in the assembling process, the assembling efficiency is high, and the environment is protected.
Description
Technical Field
The invention relates to the technical field of optical fiber communication, in particular to an optical module.
Background
With the progress of technology, Chip On Board (COB) technology is also widely used, in which a Chip is mounted On a Printed Circuit Board (PCB). In the existing optical module, COB technology is also used, which mounts a Vertical Cavity Surface Emitting Laser (VCSEL) on a PCB board, and since the VCSEL emits light vertically upwards, a lens assembly needs to be installed above the VCSEL to refract and transmit the light, and the Laser light emitted from the VCSEL is transmitted into an optical fiber. When the lens component is fixed with the PCB, the lens component is required to be precisely superposed with the light emitting surface of the laser to ensure the transmission of light, and finally the light can be coupled into the optical fiber.
Therefore, in the prior art, when the lens assembly is installed on the PCB, the laser needs to be electrified to work, the alignment of the lens assembly can be realized by monitoring the optical power in real time, the lens assembly can be fixed on the PCB after the alignment, the lens assembly needs to be positioned and the optical power needs to be observed at the same time, the operation is very inconvenient, the assembly efficiency is not high, and the laser needs to work all the time in the assembly process; it consumes more energy and is not beneficial to environmental protection.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks, an object of the present invention is to provide an optical module capable of realizing passive assembly.
The purpose of the invention is realized by the following technical scheme:
the present invention is an optical module including:
the laser positioning device comprises a printed circuit board, a positioning bracket and a lens assembly, wherein a laser is fixed on the surface of the printed circuit board, and the positioning bracket is fixedly provided with the lens assembly; the bottom of the lens component is provided with a containing groove for containing the positioning bracket; a first positioning piece is arranged in the positioning support, and a second positioning piece butted with the first positioning piece is arranged in the accommodating groove at the bottom of the lens assembly; and an optical part is arranged in the lens component, is aligned with the light emitting surface of the laser and shapes the light emitted by the laser.
The optical module is provided with the positioning support on the printed circuit board and is matched and fixed with the positioning column on the lens assembly through the positioning hole of the positioning support, so that the assembled lens assembly can be precisely coincided with the light emitting surface of the laser, the light transmission effect is effectively ensured, the laser does not need to be started in the assembling process, the assembling efficiency is high, the energy consumption in the assembling process is reduced, and the environment protection is facilitated.
Drawings
For the purpose of easy explanation, the present invention will be described in detail with reference to the following preferred embodiments and the accompanying drawings.
FIG. 1 is a schematic cross-sectional view of an optical module according to the present invention;
FIG. 2 is a schematic diagram of the overall structure of the lens assembly of the present invention;
FIG. 3 is a schematic view of the positioning bracket assembly of the present invention;
FIG. 4 is a schematic view of the assembly position of the positioning frame and the lens assembly of the present invention;
FIG. 5 is a schematic view of the overall structure of the printed wiring board according to the present invention;
FIG. 6 is a schematic diagram of an overall structure of an optical module according to the present invention;
FIG. 7 is a schematic view of the work flow of an assembly process of an optical module according to the present invention;
fig. 8 is a schematic workflow diagram of another assembling process of the optical module of the present invention.
Description of reference numerals: 10. a printed wiring board; 11. a guide mark; 20. a laser; 30. positioning the bracket; 31. positioning holes; 40. a lens assembly; 41. accommodating grooves; 42. a positioning column; 43. a transmission surface; 44. A reflective surface; 45. an accommodating cavity; 50. an optical fiber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
An optical module according to an embodiment of the present invention is described in detail below with reference to fig. 1 to 6, which includes:
the laser device comprises a printed circuit board 10, wherein a laser device 20 is attached to the surface of the printed circuit board 10, the laser device 20 is a vertical cavity surface emitting laser device, a positioning support 30 is fixedly arranged on the surface of the printed circuit board 10, and the positioning support 30 can be arranged on the surface of the printed circuit board 10 in a welding, sticking and other modes; the positioning bracket 30 is fixedly provided with a lens assembly 40; the bottom of the lens assembly 40 is provided with a containing groove 41 for containing the positioning bracket 30; for better positioning, the outer contour of the receiving groove 41 and the inner contour of the positioning bracket 30 can be configured to be the same shape; a first positioning piece is arranged in the positioning bracket 30, and a second positioning piece butted with the first positioning piece is arranged in the accommodating groove 41 at the bottom of the lens assembly 40; the lens assembly 40 is provided with an optical part, the optical part is aligned with the light emitting surface of the laser 20, and the light emitted by the laser 20 is shaped and then emitted from the light outlet of the lens assembly 40; and the light outlet can be provided with an optical fiber interface for butting with the optical fiber.
According to the invention, the second positioning piece on the lens assembly 40 is butted with the first positioning piece in the positioning bracket 30, so that the positioning between the positioning bracket 30 and the lens assembly 40 can be realized; according to the invention, the positioning support 30 is used as a positioning reference, the first positioning piece is arranged on the positioning support 30, and the laser 20 and the lens assembly 40 are placed according to the reference, so that the alignment of the positions is ensured, the laser 20 does not need to work all the time during assembly, real-time coupling equipment is not needed, the assembly quality is ensured, and the assembly efficiency can be improved.
In this embodiment, two optical components are disposed in the lens assembly 40, and the accommodating groove 41 is disposed between the two optical components; two optical components are distributed on both sides of the receiving groove 41, which better positions the mounting position of the lens assembly 40 using the positioning bracket 30. Since two sets of optical components are provided in the lens assembly 40, the number of lasers 20 corresponds to the number of optical components. The two lasers 20 can be operated independently, greatly increasing their operating efficiency.
In this embodiment, the first positioning element is a positioning hole 31, and the second positioning element is a positioning column 42 matched with the positioning hole 31. During assembly, the positioning posts 42 of the lens assembly 40 are inserted into the positioning holes 31 of the positioning bracket 30.
In the present embodiment, a guide mark 11 is further provided on the surface of the printed wiring board 10, and the guide mark 11 is used for determining the mounting position of the positioning bracket 30 on the surface of the printed wiring board 10; the guide mark 11 may be provided on the surface of the printed wiring board 10 by painting, etching, or the like.
In the present embodiment, the guide mark 11 is a circular mark, the diameter of the guide mark 11 matches the diameter of the mark of the positioning hole 31, and the positioning hole 31 is aligned with the guide mark 11. In other embodiments, the guide mark 11 may be an outer contour line of the positioning bracket 30 or a figure identical to the horizontal cross section of the positioning bracket 30, the positioning bracket 30 is assembled in alignment with the outer contour line or the figure, and the positioning hole 31 is a through hole which facilitates alignment of the bottom of the positioning hole 31 with the guide mark 11.
In the present embodiment, the number of the guide marks 11 is two, and the number of the positioning holes 31 is the same as the number of the guide marks 11 and the positioning posts 42.
In the present embodiment, the optical part includes: a transmission surface 43 and a reflection surface 44; the transmission surface 43 is arranged at the bottom of the lens assembly 40 and is aligned with the light emitting surface of the laser 20; the light entrance axis of the reflective surface 44 is aligned with the light exit axis of the transmissive surface 43, and the light exit axis of the reflective surface 44 is aligned with the light exit port of the lens assembly 40.
In this embodiment, the lens assembly is integrally formed by injection molding, and the transmission surface and the reflection surface are integrally formed on the housing.
When the optical fiber is used, light generated by the laser 20 is output through the light emitting surface, the light is converged through the transmission surface 43 and enters the reflection surface 44, and the light is reflected by the reflection surface 44 and then is input into the optical fiber from the light outlet of the lens component 40.
In another embodiment, the transmitting surface and the reflecting surface of the optical part may be provided by a transmitting mirror and a reflecting mirror, respectively; the transmission mirror is arranged on the light inlet at the bottom of the lens component 40 and is aligned with the light emitting surface of the laser 20; the reflector is arranged inside the lens component 40, the light inlet shaft of the reflector is aligned with the light outlet shaft of the transmission surface, and the light outlet shaft of the reflector is aligned with the light outlet of the lens component 40.
In this embodiment, the bottom of the lens assembly 40 is provided with an accommodating cavity 45, the accommodating cavity 41 and the transmission surface 43 are both disposed on the top end surface of the accommodating cavity 45, and the laser 20 is disposed in the accommodating cavity 45.
An assembling method applied to an optical module of the present invention is specifically described below with an embodiment, wherein a specific structure of the optical module may refer to the above description. Referring to fig. 7, the assembling method includes:
s701, fixedly mounting an upper positioning support
Fixedly installing a positioning bracket on the printed circuit board, wherein a positioning hole is formed in the positioning bracket; and fixing the positioning bracket on the surface of the printed circuit board in a welding or sticking mode in the middle of the printed circuit board.
S702, determining the mounting position of the laser
After the positioning support is fixedly installed, determining the mounting position of the laser on the printed circuit board by taking the positioning hole in the positioning support as an original point and combining the horizontal distance from the transmission surface in the optical part to the positioning column on the lens assembly shell; the horizontal distance from the light emitting surface of the laser to the positioning hole is equal to the horizontal distance from the optical part to the positioning column on the lens component shell; wherein, the horizontal plane is a plane parallel to the surface of the printed circuit board in the embodiment; the horizontal distance is a vector and represents a linear distance from the light-emitting surface to the positioning hole on the horizontal plane or a linear distance from the transmission surface to the positioning column on the horizontal plane; such as: if the distance between the left side transmission surface and the positioning column is 10mm, determining the left side position which is 10mm away from the positioning hole as the mounting position of the left side laser by taking the positioning hole as the original point; since the optical component and the positioning post are both arranged on the lens assembly, a substantially horizontal distance between the transmission surface and the positioning post on the lens assembly housing can be obtained already during production of the lens assembly.
S703. attaching a laser
And a laser is mounted on the mounting position of the printed circuit board.
S704, fixing the lens assembly with the positioning support
After the laser is mounted, a positioning column in the lens assembly is connected into a positioning hole of the positioning support, and the lens assembly and the positioning support are fixed in a welding or sticking mode; in this way, both the laser and the lens assembly are already fixed relative to the printed wiring board. The invention takes the positioning bracket as the positioning reference between the laser and the lens component; based on the existing production technology, the production precision of the positioning bracket is higher, and the precise alignment between the laser and the lens component is effectively ensured; and the laser does not need to work all the time during assembly, and real-time coupling equipment is not needed, so that the assembly quality is ensured, and the assembly efficiency can be improved.
In another embodiment, a method for assembling an optical module according to the present invention is described in detail below with reference to fig. 8, which includes:
s801, adding guide marks on printed circuit boards
Adding a guide mark on a preset position of the printed circuit board, wherein a positioning hole is formed in the positioning support; and adding a guide mark at the middle position of the printed circuit board to realize coarse positioning of the mounting position of the positioning bracket.
S802. fixed mounting upper positioning support
Fixedly mounting a positioning bracket at the position indicated by the guide mark, and aligning a positioning hole in the positioning bracket with the circular guide mark; and fixing the positioning bracket on the surface of the printed circuit board in a welding or sticking mode in the middle of the printed circuit board.
S803, measuring the distance between the optical part and the positioning column
Measuring the horizontal distance between the optical part and a positioning column on the lens component shell; while in the production of the lens assembly it is already possible to obtain a substantially horizontal distance between the transmission face and the positioning post on the lens assembly housing; however, in order to increase the assembly accuracy and reduce the influence of the production process on the horizontal distance of the lens assemblies, in the present embodiment, before the lens assemblies in the same batch are assembled, the horizontal distance between the optical parts of the lens assemblies and the positioning columns on the lens assembly shell is measured, and the measurement results are recorded; the mounting position of the laser is determined by the measured horizontal distance.
S804, determining the mounting position of the laser
After the positioning support is fixedly installed, determining the mounting position of the laser on the printed circuit board by taking the positioning hole in the positioning support as an original point and combining the horizontal distance from the transmission surface in the optical part to the positioning column on the lens assembly shell; the horizontal distance from the light emitting surface of the laser to the positioning hole is equal to the horizontal distance from the optical part to the positioning column on the lens component shell; wherein, the horizontal plane is a plane parallel to the surface of the printed circuit board in the embodiment; the horizontal distance is a vector and represents a linear distance from the light-emitting surface to the positioning hole on the horizontal plane or a linear distance from the transmission surface to the positioning column on the horizontal plane; such as: and the distance from the left side transmission surface to the positioning column is 10mm, and the left side position which is 10mm away from the positioning hole is determined as the mounting position of the left side laser by taking the positioning hole as the original point.
S805. attaching laser
And a laser is mounted on the mounting position of the printed circuit board.
S806, fixing the lens assembly with the positioning support
After the laser is mounted, a positioning column in the lens assembly is connected into a positioning hole of the positioning support, and the lens assembly and the positioning support are fixed in a welding or sticking mode; in this way, both the laser and the lens assembly are already fixed relative to the printed wiring board. And finally, inserting and fixing the optical fiber on the light outlet of the lens component to complete the assembly work. The invention takes the positioning bracket as the positioning reference between the laser and the lens component; based on the existing production technology, the production precision of the positioning bracket is higher, and the precise alignment between the laser and the lens component is effectively ensured; and the laser does not need to work all the time during assembly, and real-time coupling equipment is not needed, so that the assembly quality is ensured, and the assembly efficiency can be improved.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A light module, comprising: the laser device comprises a printed circuit board, a laser device and a positioning bracket, wherein the surface of the printed circuit board is fixedly provided with the laser device; the bottom of the lens component is provided with a containing groove for containing the positioning bracket, and the outer contour of the containing groove is matched with the shape of the inner contour of the positioning bracket; a first positioning piece is arranged in the positioning support, and a second positioning piece butted with the first positioning piece is arranged in the accommodating groove at the bottom of the lens assembly; and an optical part is arranged in the lens component, is aligned with the light emitting surface of the laser and shapes the light emitted by the laser.
2. The optical module of claim 1, wherein two optical components are disposed in the lens assembly, and the receiving groove is disposed between the two optical components.
3. The optical module as claimed in claim 2, wherein the first positioning member is a positioning hole, and the second positioning member is a positioning post engaged with the positioning hole.
4. The optical module according to claim 3, wherein a surface of the printed wiring board is further provided with a guide mark for positioning a mounting position of the positioning bracket on the surface of the printed wiring board.
5. The light module as claimed in claim 4, wherein the guide mark is a circular mark having a diameter corresponding to a diameter of the mark of the positioning hole, and the positioning hole is aligned with the guide mark.
6. The optical module according to claim 5, wherein the number of the guide marks is two, and the number of the positioning holes is the same as the number of the guide marks and the number of the positioning posts.
7. The optical module of claim 1, wherein the optical component comprises a transmissive surface and a reflective surface; the transmission surface is arranged at the bottom of the lens component and is aligned with the light emitting surface of the laser; the light inlet shaft of the reflecting surface is aligned with the light outlet shaft of the transmission surface, and the light outlet shaft of the reflecting surface is aligned with the light outlet of the lens component.
8. The optical module of claim 7, wherein the lens assembly is integrally injection molded, and the transmissive surface and the reflective surface are integrally molded on the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810276067.6A CN108513425B (en) | 2018-03-29 | 2018-03-29 | Optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810276067.6A CN108513425B (en) | 2018-03-29 | 2018-03-29 | Optical module |
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| CN108513425A CN108513425A (en) | 2018-09-07 |
| CN108513425B true CN108513425B (en) | 2020-11-24 |
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| CN201810276067.6A Active CN108513425B (en) | 2018-03-29 | 2018-03-29 | Optical module |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113296200B (en) * | 2020-07-09 | 2022-11-29 | 阿里巴巴集团控股有限公司 | Optical module |
| CN111897062B (en) * | 2020-07-28 | 2022-03-08 | 武汉电信器件有限公司 | Optical path coupling method and device and storage medium |
| CN112230350B (en) * | 2020-10-23 | 2022-04-19 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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| CN1208955A (en) * | 1997-07-30 | 1999-02-24 | 精工爱普生株式会社 | IC-mounted structre, liquid crystal device and electronic device |
| CN1751244A (en) * | 2003-02-21 | 2006-03-22 | 日本发条株式会社 | Chip-mounting tape inspecting method and probe unit used for inspection |
| CN104101957A (en) * | 2013-04-02 | 2014-10-15 | 鸿富锦精密工业（深圳）有限公司 | Fiber connector |
| CN104122627A (en) * | 2013-04-23 | 2014-10-29 | 鸿富锦精密工业（深圳）有限公司 | Optical communication module |
| CN203941321U (en) * | 2014-07-02 | 2014-11-12 | 苏州旭创科技有限公司 | Optical module |
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2018
- 2018-03-29 CN CN201810276067.6A patent/CN108513425B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1208955A (en) * | 1997-07-30 | 1999-02-24 | 精工爱普生株式会社 | IC-mounted structre, liquid crystal device and electronic device |
| CN1751244A (en) * | 2003-02-21 | 2006-03-22 | 日本发条株式会社 | Chip-mounting tape inspecting method and probe unit used for inspection |
| CN104101957A (en) * | 2013-04-02 | 2014-10-15 | 鸿富锦精密工业（深圳）有限公司 | Fiber connector |
| CN104122627A (en) * | 2013-04-23 | 2014-10-29 | 鸿富锦精密工业（深圳）有限公司 | Optical communication module |
| CN203941321U (en) * | 2014-07-02 | 2014-11-12 | 苏州旭创科技有限公司 | Optical module |
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