CN104089884A - Optical front-end structure of gas analyzer - Google Patents
Optical front-end structure of gas analyzer Download PDFInfo
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- CN104089884A CN104089884A CN201310698623.6A CN201310698623A CN104089884A CN 104089884 A CN104089884 A CN 104089884A CN 201310698623 A CN201310698623 A CN 201310698623A CN 104089884 A CN104089884 A CN 104089884A
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- lens
- light source
- gas analyzer
- air chamber
- end structure
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Abstract
The invention relates to an optical front-end structure of a gas analyzer. The structure comprises a light source, a light source installation cylinder, a connecting piece, a gas chamber and a lens. The light source is installed in the light source installation cylinder, the connecting piece connects the light source installation cylinder and the gas chamber so as to lead the light source emitted light to the gas chamber, and the lens is mounted at the front end of the gas chamber. According to the optical front-end structure of the gas analyzer provided by the invention, by placing the lens at the front end of the gas chamber, the use of glass optical lenses is reduced, light attenuation is lowered, the light utilization rate is improved, and the service life of the light source is prolonged.
Description
Technical field
The present invention relates to a kind of checkout equipment, relate in particular to a kind of optical front-end structure of gas analyzer.
Background technology
Gas analyzer is to utilize the absorption characteristic of spectrum the dusty gas in atmosphere or flue gas to be carried out to the analytical instrument of Real-Time Monitoring, generally comprises ultraviolet gas analyzer, visible ray gas analyzer and infrared gas analyzer.Fig. 1 is the optical front-end structure of a kind of typical ultraviolet gas analyzer in prior art, it comprises light source 12, light source mounting cylinder 11, two lens 13, web member 14, air chamber 16 and diaphragms 15, light source 12 is arranged in light source mounting cylinder 11, two lens 13 are arranged in light source mounting cylinder 11 abreast, and are positioned at the place ahead of light source 12.Web member 14 connects light source mounting cylinders 11 and air chambers 16, and diaphragm 15 is arranged in air chamber 16 one end with closed air chamber 16.In the optical front-end structure of this gas analyzer, the light sending from light source 12 has passed through three sheet glass sheets to entering air chamber 16, even and best saturating ultraviolet quartz glass eyeglass, its transmitance at ultraviolet band also only has 90% left and right, therefore every many through a slice eyeglasses, light intensity 10% left and right of all can decaying.The optical front-end structure of existing gas analyzer is generally provided with two and above glass mirror between light source and air chamber, has therefore reduced light utilization efficiency, has shortened the serviceable life of light source.
Summary of the invention
Based on the deficiencies in the prior art, the technical issues that need to address of the present invention are to provide the optical front-end structure of the gas analyzer that a kind of light utilization efficiency is higher.
For solving the problems of the technologies described above, the invention provides a kind of optical front-end structure of gas analyzer, it comprises light source, light source mounting cylinder, web member, air chamber and lens, described light source is arranged in described light source mounting cylinder, described web member connects described light source mounting cylinder and described air chamber, with photoconduction that described light source is sent, to described air chamber, described lens are arranged on the front end of described air chamber.
As the improvement on the one hand of the optical front-end structure of a kind of gas analyzer of the present invention, described lens are arranged on the junction of described air chamber and described web member.
As the improvement on the one hand of the optical front-end structure of a kind of gas analyzer of the present invention, between the periphery of described lens and the inwall of described air chamber, be provided with seal.
As the improvement on the one hand of the optical front-end structure of a kind of gas analyzer of the present invention, described seal is annular, and coaxially arranges with described lens, and described seal is positioned at the inner side of described lens.
As the improvement on the one hand of the optical front-end structure of a kind of gas analyzer of the present invention, described lens are simple lens.
As the improvement on the one hand of the optical front-end structure of a kind of gas analyzer of the present invention, described lens are biconvex lens or plano-convex lens.
As the improvement on the one hand of the optical front-end structure of a kind of gas analyzer of the present invention, described air chamber is cylindrical, and the primary optical axis of described lens is coaxial with the axis of described air chamber.
As the improvement on the one hand of the optical front-end structure of a kind of gas analyzer of the present invention, described web member is hollow frustum structure, the miner diameter end of described web member is connected with the end of described light source mounting cylinder, and the bigger diameter end of described web member is connected with the end of described air chamber.
As the improvement on the one hand of the optical front-end structure of a kind of gas analyzer of the present invention, described web member is open circles frustum structure, and its axis is coaxial with the primary optical axis of described lens.
As the improvement on the one hand of the optical front-end structure of a kind of gas analyzer of the present invention, it is characterized in that, the luminous point of described light source is positioned at the focus place of described lens.
The optical front-end structure of gas analyzer provided by the invention, by lens being arranged on to the front end of air chamber, thereby has reduced the use of glass mirror, has reduced light sorrow and has subtracted, and has improved light utilization efficiency, has extended light source serviceable life.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.
Fig. 1 is the structural representation of the optical front-end structure of ultraviolet gas analyzer of the prior art.
Fig. 2 is the structural representation of the optical front-end structure of the gas analyzer that provides of the embodiment of the present invention.
Embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the present invention can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Please refer to Fig. 2, the embodiment of the present invention provides a kind of optical front-end structure of gas analyzer, and it comprises light source 22, light source mounting cylinder 21, web member 23, air chamber 25 and lens 24.
Light source mounting cylinder 21 has light-emitting window.Light source 22 is arranged in light source mounting cylinder 21.This light source 22 can be continuous spectrum light source, and for example deuterium lamp or xenon lamp also can be for line spectrum light source, as mercury lamp.Web member 23 connects the light-emitting window of light source mounting cylinders 21 and the light inlet of air chamber 25, for photoconduction that light source 22 is sent to air chamber 25.Air chamber 25 is collection chambers of mobility dusty gas.Lens 24 are arranged on the front end of air chamber 25, for the divergent rays that light source 22 is sent, collimate, and become directional light.Lens 24 can fix with the mechanical fastener of level.
Light source 22 is luminous incessantly, and the light that web member 23 sends light source 22 imports in air chamber 25, then passes through the spectral absorption characteristics of the gas in other device analysis air chambers 25, thereby detects the content of contaminants in gas matter.
Because lens 24 are arranged on the front end of air chamber 25, the front end of air chamber 25, without diaphragm is set in addition again, has therefore reduced the use of glass mirror in light path, has reduced light sorrow and has subtracted, and has improved light utilization efficiency, has extended light source serviceable life.
It should be noted that, indication gas analyzer of the present invention, can be ultraviolet gas analyzer, can be also visible ray gas analyzer, can also be infrared gas analyzer.
In a preferred embodiment, lens 24 are arranged on the junction of air chamber 25 and web member 23, are also that lens 24 seal one end of air chamber 25, can make like this structure of air chamber 25 be simplified.
In a preferred embodiment, between the periphery of lens 24 and the inwall of air chamber 25, be provided with seal 26, thereby by one end sealing of air chamber 25.Particularly, seal 26 is annular, and coaxially arranges with lens 24, and seal 26 is positioned at the inner side of lens 24.Seal 26 can be the O-ring seal (for example O shape circle) of ring-type, can be also the fluid sealant of smearing circlewise.
In a preferred embodiment, lens 24 are simple lens, to reduce optical attenuation.In other embodiments, lens 24 can be also the synthetic lens combination of a plurality of lens combination.
In a preferred embodiment, lens 24 are biconvex lens or plano-convex lens, thereby the light that light source 22 can be sent collimates.
In a preferred embodiment, air chamber 25 is cylindrical, and the primary optical axis of lens 24 is coaxial with the axis of air chamber 25.
In a preferred embodiment, web member 23 is hollow frustum structure, is also that web member 23 has miner diameter end (one end that radius is less) and bigger diameter end (one end that radius is larger).The miner diameter end of web member 23 is connected with the end of light source mounting cylinder 21, and the bigger diameter end of web member 23 is connected with the end of air chamber 25.The bigger diameter end of lens 24 contiguous web members 23.The web member 23 so arranging has good light guide effect.It should be noted that, in other embodiments, web member 23 can be also hollow cylinder structure.
Further, web member 23 is open circles frustum structure, and its axis is coaxial with the primary optical axis of lens 24.Particularly, web member 23 is made by opaque material.
In a preferred embodiment, the luminous point of light source 22 is positioned at the focus place of lens 24, so can make the light that light source 22 sends be collimated preferably, also becomes directional light.
The optical front-end structure of the gas analyzer that the embodiment of the present invention provides, by lens being arranged on to the front end of air chamber, thereby has reduced the use of glass mirror, has reduced light sorrow and has subtracted, and has improved light utilization efficiency, has extended light source serviceable life.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the optical front-end structure of a gas analyzer, it is characterized in that, comprise light source, light source mounting cylinder, web member, air chamber and lens, described light source is arranged in described light source mounting cylinder, described web member connects described light source mounting cylinder and described air chamber, with photoconduction that described light source is sent, to described air chamber, described lens are arranged on the front end of described air chamber.
2. the optical front-end structure of gas analyzer according to claim 1, is characterized in that, described lens are arranged on the junction of described air chamber and described web member.
3. the optical front-end structure of gas analyzer according to claim 1 and 2, is characterized in that, between the periphery of described lens and the inwall of described air chamber, is provided with seal.
4. the optical front-end structure of gas analyzer according to claim 3, is characterized in that, described seal is annular, and coaxially arranges with described lens, and described seal is positioned at the inner side of described lens.
5. the optical front-end structure of gas analyzer according to claim 1, is characterized in that, described lens are simple lens.
6. the optical front-end structure of gas analyzer according to claim 5, is characterized in that, described lens are biconvex lens or plano-convex lens.
7. the optical front-end structure of gas analyzer according to claim 1, is characterized in that, described air chamber is cylindrical, and the primary optical axis of described lens is coaxial with the axis of described air chamber.
8. according to the optical front-end structure of the gas analyzer described in claim 1 to 7 any one, it is characterized in that, described web member is hollow frustum structure, and the miner diameter end of described web member is connected with the end of described light source mounting cylinder, and the bigger diameter end of described web member is connected with the end of described air chamber.
9. the optical front-end structure of gas analyzer according to claim 8, is characterized in that, described web member is open circles frustum structure, and its axis is coaxial with the primary optical axis of described lens.
10. according to the optical front-end structure of the gas analyzer described in claim 1 to 7 any one, it is characterized in that, the luminous point of described light source is positioned at the focus place of described lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310698623.6A CN104089884A (en) | 2013-12-18 | 2013-12-18 | Optical front-end structure of gas analyzer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310698623.6A CN104089884A (en) | 2013-12-18 | 2013-12-18 | Optical front-end structure of gas analyzer |
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| CN104089884A true CN104089884A (en) | 2014-10-08 |
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| CN201310698623.6A Pending CN104089884A (en) | 2013-12-18 | 2013-12-18 | Optical front-end structure of gas analyzer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502541A (en) * | 2014-12-30 | 2015-04-08 | 力合科技（湖南）股份有限公司 | Gas chamber device for gas analyzer |
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| CN2426148Y (en) * | 2000-07-04 | 2001-04-04 | 北京天虹智能仪表有限责任公司 | Infrared sulfur dioxide analysis instrument |
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| CN101221123A (en) * | 2008-02-02 | 2008-07-16 | 天津大学 | Air chamber suitable for multiple gas detecting |
| WO2010096074A1 (en) * | 2009-02-18 | 2010-08-26 | The Board Of Regents For Oklahoma State University | Chlorine dioxide sensor |
| CN202189011U (en) * | 2011-07-20 | 2012-04-11 | 郭振铎 | Novel gas absorbing device |
| CN102721662A (en) * | 2011-07-19 | 2012-10-10 | 赵捷 | Mining infrared gas sensor with high efficiency of light sources |
| CN203705329U (en) * | 2013-12-18 | 2014-07-09 | 力合科技（湖南）股份有限公司 | Optical front-end structure of gas analyzer |
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2013
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2426148Y (en) * | 2000-07-04 | 2001-04-04 | 北京天虹智能仪表有限责任公司 | Infrared sulfur dioxide analysis instrument |
| CN2559981Y (en) * | 2002-02-08 | 2003-07-09 | 武汉理工大学 | Optical fibre gas-sensitive sensing measuring apparatus |
| CN101221123A (en) * | 2008-02-02 | 2008-07-16 | 天津大学 | Air chamber suitable for multiple gas detecting |
| WO2010096074A1 (en) * | 2009-02-18 | 2010-08-26 | The Board Of Regents For Oklahoma State University | Chlorine dioxide sensor |
| CN102721662A (en) * | 2011-07-19 | 2012-10-10 | 赵捷 | Mining infrared gas sensor with high efficiency of light sources |
| CN202189011U (en) * | 2011-07-20 | 2012-04-11 | 郭振铎 | Novel gas absorbing device |
| CN203705329U (en) * | 2013-12-18 | 2014-07-09 | 力合科技（湖南）股份有限公司 | Optical front-end structure of gas analyzer |
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| 李武生 等: "《工程制图 第2版》", 31 August 2018, 武汉工业大学出版社 * |
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| CN104502541A (en) * | 2014-12-30 | 2015-04-08 | 力合科技（湖南）股份有限公司 | Gas chamber device for gas analyzer |
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