CN105403962B - A kind of optical module - Google Patents

A kind of optical module Download PDF

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Publication number
CN105403962B
CN105403962B CN201510893054.XA CN201510893054A CN105403962B CN 105403962 B CN105403962 B CN 105403962B CN 201510893054 A CN201510893054 A CN 201510893054A CN 105403962 B CN105403962 B CN 105403962B
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CN
China
Prior art keywords
electric conductor
optical module
lower casing
interface end
optical
Prior art date
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.)
Active
Application number
CN201510893054.XA
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Chinese (zh)
Other versions
CN105403962A (en
Inventor
赵伟
崔伟
潘红超
刘寅龙
于琳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hisense Broadband Multimedia Technology Co Ltd
Original Assignee
Hisense Broadband Multimedia Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hisense Broadband Multimedia Technology Co Ltd filed Critical Hisense Broadband Multimedia Technology Co Ltd
Priority to CN201510893054.XA priority Critical patent/CN105403962B/en
Publication of CN105403962A publication Critical patent/CN105403962A/en
Priority claimed from US15/222,550 external-priority patent/US9746625B2/en
Application granted granted Critical
Publication of CN105403962B publication Critical patent/CN105403962B/en
Active legal-status Critical Current
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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • G02B6/4201Packages, e.g. shape, construction, internal or external details
    • G02B6/4274Electrical aspects
    • G02B6/428Electrical aspects containing printed circuit boards [PCB]
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • G02B6/4201Packages, e.g. shape, construction, internal or external details
    • G02B6/4274Electrical aspects
    • G02B6/4277Protection against electromagnetic interference [EMI], e.g. shielding means

Abstract

The invention discloses a kind of optical module, including upper casing, lower casing and the circuit board being arranged between the upper casing and lower casing, one end of the optical module is optical interface end, other end is electrical interface end, the electrical interface end has golden finger, the golden finger is arranged on the circuit board, and at least one electric conductor is provided between the optical interface end and the electrical interface end, and the electric conductor extends to the lower casing from the upper casing.The optical module of the present invention, by being provided with least one electric conductor on the inside of golden finger, space between described two side plates is at least divided into two parts by electric conductor, there is the principle of function of shielding according to space to electromagnetic wave, optical module after electric conductor is set, script space maximum straight-line dimension is diminished, the electromagnetic intensity by this space can be weakened, the electromagnetic wave that can effectively reduce golden finger radiation is leaked through the space between circuit board and housing from optical interface end.

Description

A kind of optical module
Technical field
It is to be related to a kind of optical module specifically the invention belongs to optical module technical field.
Background technology
In optical communication system, optical module is used to transmit the optical signal of the transmission such as optical connector to mainboard, or will be main The electric signal that plate is sent is converted into optical signal launch and gone out.It is optical-path interface in wherein one end of optical module, for passing through connection Device connects optical cable, and other end is sets golden finger on circuit boards, and golden finger connects equipment by connecting plug-in unit.Current , there is space in optical module, cause the electromagnetic wave that golden finger is radiated through the sky between circuit board and housing between circuit board and housing Gap is leaked out from optical interface, and electromagnetic interference is caused to other equipment.
The content of the invention
The present invention is easy through between circuit board and housing in order to solve the electromagnetic wave that the golden finger of existing optical module is radiated Space is leaked out from optical interface, and the technical problem of electromagnetic interference is caused to other equipment, it is proposed that a kind of optical module, can be solved Certainly above mentioned problem.
In order to solve the above-mentioned technical problem, the present invention is achieved using following technical scheme:
A kind of optical module, including upper casing, lower casing and the circuit board that is arranged between the upper casing and lower casing, the light One end of module is optical interface end, and other end is electrical interface end, and the electrical interface end has golden finger, and the golden finger is set In on the circuit board, it is characterised in that be provided with least one electric conductor between the optical interface end and the electrical interface end, The electric conductor extends to the lower casing from the upper casing.
Compared with prior art, advantages and positive effects of the present invention are:The optical module of the present invention, by golden finger Inner side is provided with least one electric conductor, and the space between upper casing or two sides of lower casing is at least divided into two by electric conductor Point, the stronger principle of screening ability is had to electromagnetic wave according to the smaller space of diameter, the optical module after electric conductor, golden hand are set The electromagnetic wave for referring to radiation is transmitted between the holetransport of electric conductor both sides, or two neighboring electric conductor respectively(With multiple During electric conductor), former space maximum straight-line dimension is diminished, the electromagnetic intensity by this hole, electric conductor quantity can be weakened More, the maximum straight-line dimension in Electromagnetic Wave Propagation space is smaller, and corresponding electromagnetic shielding capability is stronger, can effectively reduce golden finger The electromagnetic wave of radiation is leaked through the space between circuit board and housing from optical interface end.
It is read in conjunction with the figure after the detailed description of embodiment of the present invention, the other features and advantages of the invention will become more Plus it is clear.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of example structure schematic diagram of optical module proposed by the invention;
Fig. 2 is Fig. 1 disassembly and assembly structure schematic diagram;
Fig. 3 is Fig. 1 lateral plan;
Fig. 4 is the simplification figure for circuit board in Fig. 3 and its rectangular structure;
Fig. 5 is simplification figure when Fig. 4 is not provided with electric conductor.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
Embodiment one, the present embodiment proposes a kind of optical module, as shown in Figure 1 and Figure 2, including upper casing 11, lower casing 12, with And the circuit board 13 between the upper casing 11 and lower casing 12 is arranged on, the upper casing 11 or lower casing 12 have two sides, optical mode One end of block is optical interface end 10a, and other end is electrical interface end 10b, and electrical interface end 10b has golden finger 14, golden finger 14 It is arranged on circuit board 13, at least one electric conductor 15 is provided between optical interface end 10a and the electrical interface end 10b, it is conductive Body 15 extends to lower casing 12 from upper casing 11.Existing optical module does not have electric conductor 15, and when its optical module works, golden finger 14 is produced Electromagnetic radiation, is leaked out through the space between circuit board and upper casing 11 or circuit board 13 and lower casing 12 from optical interface 10a, by In optical module when in use, optical interface end 10a is located at the outside of equipment, and then can cause electromagnetic interference, this reality to other equipment The optical module in example is applied by setting electric conductor 15, the upper casing 11, lower casing 12 are metal material, as shown in figure 3, being Fig. 1 In from electrical interface end 10b invest optical interface end projection view, as shown in figure 4, being the letter of circuit board in Fig. 3 13 and its rectangular structure Change figure, Fig. 5 is simplification figure when Fig. 4 is not provided with electric conductor, and the space between two sides is at least divided into two by electric conductor 15 Individual part, namely the space between electric conductor 15 and a wherein side 16a and electric conductor 15 and opposite side as shown in Figure 4 Space between the 16b of side, if electric conductor 15 is multiple, also has space, any sky after being separated between adjacent conductive body Gap maximum straight-line dimension d1 and d2 are respectively less than the maximum straight-line dimension dn in former space, set the optical module electromagnetic radiation after electric conductor The space maximum straight-line dimension passed through diminishes, and can weaken the electromagnetic intensity by this hole, can effectively reduce golden hand The electromagnetic wave for referring to radiation is leaked through the space between circuit board and housing from optical interface end, wherein, space maximum straight-line dimension is Maximum length in the section of space between any two points, for example, the space section in the present embodiment is rectangle, maximum straight-line dimension It is the cornerwise length of rectangle, when it is circle to be space section, then maximum straight-line dimension is the length of round diameter, golden finger The electromagnetic wave of 14 radiation is transmitted from the space being separated respectively, according to the shield effectiveness formula in space:Se=20lg (λ/2d), wherein λ are electromagnetic wavelength, and d is space maximum straight-line dimension, and Se is shield effectiveness, from above formula, this programme It is middle separated by electric conductor after any space maximum straight-line dimension it is smaller than former maximum straight-line dimension, therefore maximum straight-line dimension D reduces, and corresponding shield effectiveness Se is improved.
By taking 10G optical modules as an example, wavelength X=30mm of electromagnetic wave, still using the space between circuit board 13 and lower casing 12 as Example, if without cylindrical conducting body, as shown in Figure 4, Figure 5, the space maximum length dn of circuit board 13 and lower casing 12 is Space of the circuit board about 13 does not have shielding action before 16.91mm, plus electric conductor, its shield effectiveness Se be 0, plus electric conductor after, It is 7.87mm, the shield effectiveness in space between circuit board 13 and lower casing 12 positioned at any space maximum length d1 in the both sides of electric conductor 15 For:
Se=20lg(λ/2d)=20lg(30/(2*7.87))= 5.60DB。
The shield effectiveness for adding the space after electric conductor between circuit board 13 and upper casing 11, two can be calculated using same method Person's summation can obtain total shield effectiveness, it is known that, it can shield substantial portion of energy after electric conductor is set.
As a preferred embodiment, electric conductor 15 is installed for convenience, reduces the length of electric conductor 15, electric conductor 15 Set perpendicular to upper casing 11 or lower casing 12, generally upper casing 11 be arranged in parallel with lower casing 12, then electric conductor 15 is simultaneously vertical Set in both.
According to faraday cup principle, electric conductor 15 only need to surround closure with upper casing 11, lower casing 12 and side on surface Structure can play shielding action to electromagnetism, without electric conductor 15 is prolonged on the longitudinal direction along upper casing 11 or lower casing 12 Stretch, in order to reduce the materials of electric conductor 15 and reduce the complexity of assembling, electric conductor 15 is preferably column structure.For example may be used To be realized using metallic screw, convenient material drawing, while assembling is also very convenient.
As shown in Fig. 2 circuit board 13, which is provided with, holds the through hole 13a that electric conductor 15 is passed through, due between upper casing 11 and lower casing 12 Distance it is measurable obtain, therefore, the length of electric conductor 15 is according to the distance between upper casing 11 and lower casing 12 relative set, not Influence in circuit board 13 on the premise of cloth order wire, and on the premise of the permission of space, the quantity of electric conductor 15 sets multiple electricity Magnetic Shielding Effectiveness is optimal.
The optical module of the present embodiment is reduced by way of setting electric conductor 15 from electrical interface end 10b to optical interface end 10a The intensity of electromagnetic wave reduce the outside electromagnetic radiation by optical interface end 10a, because electromagnetic interference is produced by golden finger 14 It is raw, preferably electric conductor 15 is arranged at the root of golden finger 14, it is so more preferable to the shield effectiveness of electromagnetic interference.
The tubular structure 17 matched with electric conductor 15 is fixed with the upper surface of lower casing 12, tubular structure 17 is played to leading The electric fixation of body 15, the surface of electric conductor 15, which has, has internal thread in external screw thread, tubular structure 17, electric conductor 15 passes through electricity Screwed in after the through hole 13a of road plate to the tubular structure 17.
In order to improve effectiveness, when the electric conductor 15 is multiple, multiple electric conductors 15 are located at and optical module In the vertical same plane of length direction.
Electromagnetic shielding capability depends on the width of maximum interspace, in order at utmost reduce the width of maximum interspace, when leading When electric body 15 is multiple, the plurality of electric conductor is uniformly laid between upper casing or two sides of lower casing, when electric conductor 15 is At one, the electric conductor 15 is located in the middle of two sides of upper casing or lower casing.Now the width in each space is equal, corresponding maximum The width in space is minimum.
As shown in figure 1, lower casing 12 is compared with 14 outwardly one sections of golden finger tabular protective bulkhead 12a, protective bulkhead 12a is used to work as light When module is not intended to fall, electrical interface end 10b is protected, prevents from directly touching ground when it from falling and causing to damage, protective bulkhead 12a Play a part of buffering simultaneously.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck The variations, modifications, additions or substitutions that the those of ordinary skill in domain is made in the essential scope of the present invention, should also belong to this hair Bright protection domain.

Claims (8)

1. a kind of optical module, including upper casing, lower casing and the circuit board that is arranged between the upper casing and lower casing, the optical mode One end of block is optical interface end, and other end is electrical interface end, and the electrical interface end has golden finger, and the golden finger is arranged at On the circuit board, it is characterised in that at least one electric conductor, institute are provided between the optical interface end and the electrical interface end State electric conductor and extend to the lower casing from the upper casing, the circuit board is provided with through hole, the electric conductor through the through hole to Under extend to the lower casing.
2. optical module according to claim 1, it is characterised in that the electric conductor is perpendicular to the upper casing and/or lower casing Set.
3. optical module according to claim 2, it is characterised in that the electric conductor is column structure.
4. optical module according to claim 1, it is characterised in that when the electric conductor is multiple, multiple conductive positions In in the same plane vertical with optical module length direction.
5. optical module according to claim 4, it is characterised in that the multiple electric conductor be uniformly laid in the upper casing or Between two sides of person's lower casing.
6. optical module according to claim 1, it is characterised in that when the electric conductor is one, the conductive position In the middle of two sides of the upper casing or lower casing.
7. optical module according to claim 1, it is characterised in that the upper surface of the lower casing is fixed with and the electric conductor The tubular structure matched, the surface of the electric conductor, which has, has internal thread, the conduction in external screw thread, the tubular structure Body is screwed in the tubular structure after passing through the through hole.
8. optical module according to claim 1, it is characterised in that the outwardly one section of plate of the lower casing golden finger Shape protective bulkhead.
CN201510893054.XA 2015-12-08 2015-12-08 A kind of optical module Active CN105403962B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510893054.XA CN105403962B (en) 2015-12-08 2015-12-08 A kind of optical module

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510893054.XA CN105403962B (en) 2015-12-08 2015-12-08 A kind of optical module
US15/222,550 US9746625B2 (en) 2015-12-04 2016-07-28 Optical module

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Publication Number Publication Date
CN105403962A CN105403962A (en) 2016-03-16
CN105403962B true CN105403962B (en) 2017-09-12

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6830383B2 (en) * 2001-10-17 2004-12-14 Hon Hai Precision Ind. Co., Ltd Small form factor pluggable optoelectronic transceiver module
CN101287353A (en) * 2008-05-21 2008-10-15 青岛海信电器股份有限公司 Electronic equipment with electro-magnetic shielding function
CN101938061A (en) * 2009-07-02 2011-01-05 富士康(昆山)电脑接插件有限公司 Cable connector assembly
CN102520494A (en) * 2012-01-13 2012-06-27 河北华美光电子有限公司 Packaging structure of multi-mode QSFP (Quad Small Form-factor Pluggable) parallel optical transceiver module
CN205176335U (en) * 2015-12-08 2016-04-20 青岛海信宽带多媒体技术有限公司 Optical module

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002221644A (en) * 2001-01-26 2002-08-09 Auto Network Gijutsu Kenkyusho:Kk Optical connector and structure of mounting part of optical connector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6830383B2 (en) * 2001-10-17 2004-12-14 Hon Hai Precision Ind. Co., Ltd Small form factor pluggable optoelectronic transceiver module
CN101287353A (en) * 2008-05-21 2008-10-15 青岛海信电器股份有限公司 Electronic equipment with electro-magnetic shielding function
CN101938061A (en) * 2009-07-02 2011-01-05 富士康(昆山)电脑接插件有限公司 Cable connector assembly
CN102520494A (en) * 2012-01-13 2012-06-27 河北华美光电子有限公司 Packaging structure of multi-mode QSFP (Quad Small Form-factor Pluggable) parallel optical transceiver module
CN205176335U (en) * 2015-12-08 2016-04-20 青岛海信宽带多媒体技术有限公司 Optical module

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