CN101794004A - Lens coupling photocoupler - Google Patents
Lens coupling photocoupler Download PDFInfo
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- CN101794004A CN101794004A CN 201010118522 CN201010118522A CN101794004A CN 101794004 A CN101794004 A CN 101794004A CN 201010118522 CN201010118522 CN 201010118522 CN 201010118522 A CN201010118522 A CN 201010118522A CN 101794004 A CN101794004 A CN 101794004A
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- lens
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- optical detection
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Abstract
The invention provides a lens coupling photocoupler. The structure of the lens coupling photocoupler comprises a light emitting element, an optical detecting element and a transistor element packaged in the same shell, wherein the light emitting element is fixed on a carrier; the optical detecting element and the light emitting element are oppositely fixed at the bottom of the shell in parallel; the light emitting element is provided with a lead-out wire t is connected with a signal input end; the optical detecting element is provided with a lead-out wire to connected with a signal output end; and a lens is arranged between the light emitting element and the optical detecting element. The photocoupler solves the problem that light emitted from the light emitting element in the conventional photocoupler cannot be utilized sufficiently and that current transmission is low.
Description
Technical field
The present invention relates to field of photoelectric technology, relate in particular to a kind of photoelectrical coupler that is used for opto-electronic conversion.
Background technology
Photoelectrical coupler is to be a kind of electrical-optical-power conversion device of media transmission electric signal with light.It is made up of light-emitting component, optical detection device and transistor etc., is assembled in one the housing, isolates with transparent insulator to each other.Adding electric signal at the photoelectrical coupler input end can make light-emitting component luminous, light intensity depends on the size of exciting current, after this illumination is mapped on the optical detection device, because of photoelectric effect produces photocurrent, can amplify output by transistor to this photocurrent again, so just realize the conversion of electrical-optical-electricity.
The current transfer ratio of photoelectrical coupler (CTR) is commonly defined as the output current of photoelectrical coupler and the ratio of input current, that is:
The roughly situation that has compared the anti-neutron irradiation ability of different process photoelectric coupled device in the paper that Zhou Kaiming, Yang Youli, Li Xiaowei deliver " research of photoelectric coupled device neutron irradiation damage ", analyzed the reason that device neutron displacement damage there are differences, experimental study shows that the photoelectric coupled device of low input current, high current delivery ratio has stronger anti-neutron irradiation ability.Therefore improve the current transfer ratio of photoelectrical coupler as can be known and reduce to import the capability of resistance to radiation that drive current can improve photoelectrical coupler.
Fig. 1 shows the structural representation of the photoelectrical coupler of present use, and light-emitting component and optical detection device etc. is encapsulated in the housing.The photoelectrical coupler of this kind structure can not make photo-detector make full use of the light that it sends, so efficient is lower because the angle of divergence of light-emitting component is bigger, and the input drive current is bigger, and capability of resistance to radiation is relatively poor relatively.
Summary of the invention
The technical problem to be solved in the present invention is by between the light-emitting component of photoelectrical coupler and optical detection device lens being set, to solve the shortcoming that light that light-emitting component sends can not be made full use of by photo-detector, raise the efficiency, reduce the purpose importing drive current and increase the photoelectrical coupler current transfer ratio thereby reach, improve the capability of resistance to radiation of photoelectrical coupler.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of lens coupling photocoupler, comprise the light-emitting component, optical detection device, the transistor that are encapsulated in the same housing in its structure, light-emitting component is fixed on the carrier, optical detection device is relative with light-emitting component and be fixed on the bottom of housing abreast, from the light-emitting component end extension line being set links to each other with signal input part, from the optical detection device end extension line is set and is connected, wherein: between light-emitting component and optical detection device, be provided with lens with output signal end.
Adopt the beneficial effect that technique scheme produced to be: by between the light-emitting component of photoelectrical coupler and optical detection device, being provided with lens, compare with the situation that does not have lens, can be so that optical detection device be collected more rays, thereby increase the output current of optical detection device, therefore the output current of photoelectrical coupler increases too, so just increased the current transfer ratio of photoelectrical coupler greatly, that is to say under same output current situation, reduced the input drive current of photoelectrical coupler.The current transfer ratio of the photoelectrical coupler behind the increase lens can increase more than 40%, and high reaches more than 100%, has improved the capability of resistance to radiation of photoelectrical coupler to a great extent.
Description of drawings
Fig. 1 is the structural representation of the photoelectrical coupler of prior art;
Fig. 2 is the structural representation of photoelectrical coupler of the present invention;
Among the figure: 1-light-emitting component, 2-optical detection device, 3-housing, 4-leaded light glue, 5-carrier, 6-lens.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 2, a kind of lens coupling photocoupler provided by the invention, comprise elements such as the light-emitting component 1 that is encapsulated in the same housing 3, optical detection device 2, transistor in its structure, light-emitting component 1 is fixed on the carrier 5, optical detection device 2 and light-emitting component 1 are relative and be fixed on the bottom of housing 3 abreast, link to each other with signal input part from light-emitting component 1 end lead-in wire, be connected with output signal end from optical detection device 2 ends lead-in wire, wherein: between light-emitting component 1 and optical detection device 2, be provided with lens 6.Optical detection device 2 preferably is arranged on the focal plane of lens 6.This structure setting can make optical detection device 2 collect more rays, exports bigger electric current.When the input current of photoelectrical coupler is identical, adopt the photoelectrical coupler of lens 6 like this, so the output current of photoelectrical coupler increases too, thereby improved current transfer ratio greatly because the electric current of inner optical detection device 2 outputs is bigger.
The 1-light-emitting component, 2-optical detection device, 3-housing, 4-leaded light glue, 5-lens.
The high refractive index lens that said lens 6 is preferably made with the material of refractive index＞1.5, for example available sapphire is made the lens of high index of refraction.This is because when the refractive index of lens 6 during greater than the refractive index of place medium, lens can play congregation to incident ray near the focus of lens 6.Owing to generally need to fill leaded light glue 4 in that photoelectrical coupler is inner, the refractive index of leaded light glue 4 generally be slightly smaller than 1.5 and the refractive index (being generally 1.5) of glass comparatively approaching, if the lens 6 that adopt glass to make, then the optically focused effect of lens 6 is not strong.Therefore when the inner use of photoelectrical coupler lens 6, to adopt the lens 6 of high index of refraction.Certainly, if leaded light glue 4 is not filled in photoelectrical coupler inside, can adopt common glass lens.According to experimental result, the current transfer ratio that increases lens 6 back photoelectrical couplers can increase more than 40%, and high reaches more than 100%.
The convex lens that said lens 6 can have any shape, comprise sphere and non-spherical lens, make for convenience and use, preferred lens 6 are shaped as sphere in the present embodiment, can certainly for semisphere cylindrical or other be easy to process and the convenient lens 6 that use.The current transfer ratio that increases and the refractive index of lens 6, the shape of lens 6, the size of lens 6, the area of photo-detector, the structure of photoelectrical coupler housing 3 etc. all have relation.Generally speaking, the refractive index of lens 6 is high more, and the light capacity gauge is strong more; Non-spherical lens is better than the light capacity gauge of spherical lens; The light capacity gauge of big lens 6 is better; The photo-detector area is big more, and the light capacity gauge is strong more.The structure of housing 3 has determined the distance between light-emitting component 1 and the optical detection device 2 substantially, and suitable distance just can make the function of lens 6, optical detection device 2 etc. fully be optimized.
Claims (4)
1. lens coupling photocoupler, comprise the light-emitting component (1), optical detection device (2), the transistor that are encapsulated in the same housing (3) in its structure, light-emitting component (1) is fixed on the carrier (5), optical detection device (2) is relative with light-emitting component (1) and be fixed on the bottom of housing (3) abreast, from light-emitting component (1) end extension line being set links to each other with signal input part, from optical detection device (2) end extension line is set and is connected, it is characterized in that: between light-emitting component (1) and optical detection device (2), be provided with lens (6) with output signal end.
2. lens coupling photocoupler according to claim 1 is characterized in that described optical detection device (2) is positioned on the focal plane of lens (6).
3. lens coupling photocoupler according to claim 1 is characterized in that the high refractive index lens of described lens (6) for preferably making with the material of refractive index＞1.5.
4. lens coupling photocoupler according to claim 1 is characterized in that described lens (6) are sphere or semisphere or columniform convex lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010118522 CN101794004A (en) | 2010-03-05 | 2010-03-05 | Lens coupling photocoupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010118522 CN101794004A (en) | 2010-03-05 | 2010-03-05 | Lens coupling photocoupler |
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| CN101794004A true CN101794004A (en) | 2010-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010118522 Pending CN101794004A (en) | 2010-03-05 | 2010-03-05 | Lens coupling photocoupler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819075A (en) * | 2012-09-05 | 2012-12-12 | 日月光半导体制造股份有限公司 | Optical communication assembly and optical communication package module using same |
| CN106449778A (en) * | 2016-11-16 | 2017-02-22 | 中国电子科技集团公司第四十四研究所 | Photoelectric coupler package structure used for large-scale integration |
| CN107370484A (en) * | 2017-06-26 | 2017-11-21 | 西安微电子技术研究所 | A kind of Infra red photo electric device transfer ratio adjusting method |
| CN113219602A (en) * | 2021-05-20 | 2021-08-06 | 通号(北京)轨道工业集团有限公司轨道交通技术研究院 | Optical coupler |
| CN113359249A (en) * | 2021-06-07 | 2021-09-07 | 通号(北京)轨道工业集团有限公司轨道交通技术研究院 | Optical coupling structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05304311A (en) * | 1992-04-24 | 1993-11-16 | Nec Corp | Photocoupler |
| CN1447141A (en) * | 2002-03-27 | 2003-10-08 | 松下电器产业株式会社 | Photo complexing assembly, lightwave length complexer/decomplexer and mfg. method of photo complexing assembly |
| CN101194195A (en) * | 2005-06-09 | 2008-06-04 | 惠普开发有限公司 | Optically coupled integrated circuit layers using super lens components |
| CN101442043A (en) * | 2008-12-31 | 2009-05-27 | 清华大学 | Organic light coupling device |
-
2010
- 2010-03-05 CN CN 201010118522 patent/CN101794004A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05304311A (en) * | 1992-04-24 | 1993-11-16 | Nec Corp | Photocoupler |
| CN1447141A (en) * | 2002-03-27 | 2003-10-08 | 松下电器产业株式会社 | Photo complexing assembly, lightwave length complexer/decomplexer and mfg. method of photo complexing assembly |
| CN101194195A (en) * | 2005-06-09 | 2008-06-04 | 惠普开发有限公司 | Optically coupled integrated circuit layers using super lens components |
| CN101442043A (en) * | 2008-12-31 | 2009-05-27 | 清华大学 | Organic light coupling device |
Non-Patent Citations (1)
| Title |
|---|
| 《中国优秀硕士学位论文全文数据库》 20051231 张亮 高压隔离线性光电耦合组件研究 21-47 1-3 , 2 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819075A (en) * | 2012-09-05 | 2012-12-12 | 日月光半导体制造股份有限公司 | Optical communication assembly and optical communication package module using same |
| CN106449778A (en) * | 2016-11-16 | 2017-02-22 | 中国电子科技集团公司第四十四研究所 | Photoelectric coupler package structure used for large-scale integration |
| CN107370484A (en) * | 2017-06-26 | 2017-11-21 | 西安微电子技术研究所 | A kind of Infra red photo electric device transfer ratio adjusting method |
| CN107370484B (en) * | 2017-06-26 | 2020-06-09 | 西安微电子技术研究所 | Transmission ratio adjusting method for infrared photoelectric coupler |
| CN113219602A (en) * | 2021-05-20 | 2021-08-06 | 通号(北京)轨道工业集团有限公司轨道交通技术研究院 | Optical coupler |
| CN113359249A (en) * | 2021-06-07 | 2021-09-07 | 通号(北京)轨道工业集团有限公司轨道交通技术研究院 | Optical coupling structure |
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Application publication date: 20100804 |