CN107884353A - A kind of gas absorption cell light channel structure suitable for fume continuous monitoring system - Google Patents
A kind of gas absorption cell light channel structure suitable for fume continuous monitoring system Download PDFInfo
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- CN107884353A CN107884353A CN201711416191.XA CN201711416191A CN107884353A CN 107884353 A CN107884353 A CN 107884353A CN 201711416191 A CN201711416191 A CN 201711416191A CN 107884353 A CN107884353 A CN 107884353A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Abstract
The present invention relates to a kind of gas absorption cell light channel structure suitable for fume continuous monitoring system, consists predominantly of the inside light path component that the long light path White pond for including incident optical and being filled the post of the light inputting end component of collimating mirror by non-spherical lens, include the output optical fiber and fill the post of the light extraction end component of focus lamp by aspherical biconvex lens and be made up of three spherical concave mirrors for possessing same curvature radius is filled the post of.Collimating mirror and focus lamp are made by the higher ultraviolet fused silica glass of deep ultraviolet band transmitance, it can ensure that collimated collimated light beam will not dissipate in 500mm, spot diameter is less than 3mm after line focus, and plating is set on concave mirror can reach more than 90% after ultraviolet enhancing aluminium film to the reflectivity of deep ultraviolet band light.Overcome the deficiency that beam collimation degree is poor, restriction optical path length, energy loss is big caused by structure is owed rationally in the prior art, the light channel structure of the present invention is rationally and science, reliable and stable work and accuracy of detection are high, it is a big innovation of low concentration pollution gas context of detection, there is very strong practicality.
Description
Technical field
The present invention relates to gas detection technology field, particularly a kind of gas suitable for fume continuous monitoring system absorbs
Pond light channel structure.
Background technology
There is many advantages, such as strong scalability, wide adaptation range, quilt using the detection technique of gas absorption spectra characteristic
It is widely used in the detection technique of pernicious gas.For the demand of micro low concentration pollution gasmetry, long light path measuring cell
It is a kind of effective solution, is suitably applied in the detecting instrument based on Beer-Lambert law.Long light path measuring cell
Typical structure is White pond, as shown in figure 4, being mainly made up of three plate curvature radius identical concave mirrors, wherein two panels is smaller, if
Put in one end of pond body, it is a piece of larger, it is arranged on the other end of pond body, the centers of curvature of three concave mirrors respectively falls in mutual
On minute surface, by the angle and incident ray position and angle that adjust three concave mirrors, it is possible to achieve light is between three minute surfaces
Repeatedly come and go reflection, realize compared with long light path.
Most of optical detector device on sale selects xenon source in the market, and thus obtained incident beam is in itself
Certain angle of divergence is there is, so the hot spot formed when falling on the mirror after propagating certain distance can be very big, it is so anti-
Penetrate mirror beam energy can not just to be reflected in full, cause to lose portion of energy, thus also limit the length of White pond list backhaul
Degree, so as to have impact on repeatedly turned back, increase light path realize strengthen gas absorption light energy purpose；Further, since
What is mainly utilized in measurement process is 200-400nm deep ultraviolet bands light in xenon lamp, but because its wavelength is shorter, photon energy compared with
Height, and the common aluminium film plated on currently used speculum just has stronger sink effect for deep ultraviolet band light, leads
Cause reflectivity relatively low, so, a big chunk light energy will necessarily be lost during reflection is repeatedly come and gone, along with by pond
Interior tested gas, the especially amount of the absorption of the dusty gas of high concentration, the spectral signal for making detector finally receive can be very
Weak, the signal to noise ratio of detection signal is very high, so as to influence detection sensitivity and the degree of accuracy.Therefore, the standard of collimated light beam how is improved
Straight degree, reduce projected spot to be advantageous to extend optical path length, strengthen the absorptance of gas, it is ensured that detection gas concentration it is accurate
Property, and the reflectivity of speculum how is improved, to reduce luminous energy loss, it is ensured that improve the signal to noise ratio of detection signal, improve inspection
Survey sensitivity, it has also become perplex industry at present and receive much attention and all exploring a big problem of solution.
The content of the invention
The invention aims to overcome light caused by current gas absorption cell deficiency as existing in terms of light channel structure
Beam collimation is poor, is unable to the deficiency that energy loss is big in relatively long distance transmission and transmit process, there is provided one kind can ensure that collimated
Collimated light beam afterwards can keep the collimation of relatively long distance, be easy to expand light path and reduce luminous energy in transmit process be lost, be favourable
In raising accuracy of detection, the gas absorption cell light channel structure especially suitable for fume continuous monitoring system.
The gas absorption cell light channel structure suitable for fume continuous monitoring system of the present invention is such.First, design
One structure novelty, the divergent shape light beam from light source can be carried out after collimation processing generation with relatively high degree of collimation, be easy to compared with
The collimating mirror of the collimated light beam of transmission over long distances, meanwhile, change the coating structure of mirror reflection surface, to reduce reflecting surface pair
The absorptivity of dark purple band of light, reflectivity is improved, reduce light beam and coming and going energy loss excessive in refracting process, so that it is guaranteed that
Tested gas fully absorbs to light, improves detection accuracy.
The gas absorption cell light channel structure of the present invention mainly comprising light inputting end component, light extraction end component and is arranged on pond body chamber
Interior inside light path component, wherein：Light inputting end component includes the incident optical being connected with bright lamp divergent shape light beam of light source light path
With with by divergent shape light beam of light source refractive transition be collimated light beam function collimating mirror；Light extraction end component includes outgoing
The output optical fiber that collimated light beam refractive transition is the focus lamp of emergent light spot function, is connected with spectroanalysis instrument light path；Interior lights
The light path Zigzag type long light path White pond that road component is made up of three spherical concave mirrors for possessing same curvature radius is filled the post of, wherein
Concave mirror A two small is identical with A ' physical dimension, is mounted on one end of pond body side by side, and big concave mirror B installations are set
The other end in pond body is put, is characterised by：Described collimating mirror is by the higher ultraviolet vitreous silica glass of deep ultraviolet band transmitance
Glass is made, and has the divergent shape light beam of light source refractive transition that incident optical transmission comes into will not dissipate at least in 500mm
The function of collimated light beam, the integral type non-spherical lens being made up of flat cylinder A and outer gibbosity arc plane of refraction A interconnection fill
Appoint；Described focus lamp is made up of the higher ultraviolet fused silica glass of deep ultraviolet band transmitance, has collimated light beam is first
For refractive transition into converging beam, refocusing is transformed into diameter less than 3mm, the relatively small light spot work(for being easy to the output optical fiber to receive in full
Can, one be made up of the flat-shaped cylinder A of middle flat and the outer gibbosity arc plane of refraction B positioned at the flat-shaped cylinder A front and rear sides of middle flat
The aspherical biconvex lens of body formula is filled the post of；Concave mirror A and A ' two small and big concave mirror B described in described inside light path component
Inner concave on respectively plating be provided with the reflectivity of deep ultraviolet band light is reached more than 90% ultraviolet enhancing aluminium film.
The present invention based on above-mentioned design is applied to the gas absorption cell light channel structure of fume continuous monitoring system, due to
Employed in light inputting end and be made up, have divergent shape light source light of the higher ultraviolet fused silica glass of deep ultraviolet band transmitance
Beam refractive transition instead of traditional collimation into the non-spherical lens for the collimated light beam function that will not be dissipated at least in 500mm
Mirror；Employ at light extraction end and be made up of the higher ultraviolet fused silica glass of deep ultraviolet band transmitance, had collimated light beam
For first refractive transition into converging beam, refocusing is transformed into diameter less than 3mm, the relatively small light spot work(for being easy to the output optical fiber to receive in full
The aspherical biconvex lens of energy, instead of traditional focus lamp；To the concave mirror A two small described in internal light path component and
A ' and big concave mirror B inner concave plate respectively sets the ultraviolet enhancing aluminium film for reaching more than 90% to the reflectivity of deep ultraviolet band light,
It instead of traditional common aluminium film.So make effectively to overcome tradition using the gas absorption cell light channel structure of the present invention program
Beam collimation degree in the presence of technical scheme is poor, big, the Yi Jisheng that is unable to energy loss in relatively long distance transmission and transmit process
Into hot spot it is also big, constrain the growth of light path Zigzag type long light path White pond light path, while also had a strong impact on that detection is sensitive
Degree and accuracy, and technical scheme can ensure that collimated collimated light beam can keep the collimation of relatively long distance,
It is easy to expand light path and reduces luminous energy loss in transmit process, is advantageous to improve detection sensitivity and the degree of accuracy, can meets conscientiously
The Precision measurement of environmentally friendly dusty gas, particularly low concentration pollution gas, solves puzzlement industry in fume continuous monitoring system
A great problem, be the big innovation in the detection of environmentally friendly gas in fact, hence it is evident that there is very strong practicality and valuable market to apply
Prospect.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of the embodiment of the present invention；
Fig. 2 is the structure and operating diagram of collimating mirror in the embodiment of the present invention；
Fig. 3 is the structure and operating diagram of focus lamp in the embodiment of the present invention；
Fig. 4 is the structure and operating diagram in White pond in the embodiment of the present invention；.
In figure：
1. the flat cylinder A of 11. incident optical of light inputting end component, 12. collimating mirror 121.
122. the focus lamp of 2. light extraction end components of outer gibbosity arc plane of refraction A 21.
The output optical fibers of 211. flat cylinder B, 212. outer gibbosity arc plane of refraction B 22.
3. the small concave mirror A ' of small concave mirror A 32. of inside light path component 31.
33. the big pond bodies of concave mirror B 4..
Embodiment
The invention will be further described with exemplary embodiments below in conjunction with the accompanying drawings.
In Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the gas absorption cell light path knot suitable for fume continuous monitoring system of the invention
Structure mainly includes light inputting end component 1, light extraction end component 2 and the inside light path component 3 for being arranged on the intracavitary of pond body 4, wherein：Light inputting end
Component 1, which includes the incident optical 11 being connected with bright lamp divergent shape light beam of light source light path and had, reflects divergent shape light beam of light source
It is transformed to the collimating mirror 12 of collimated light beam function；It is outgoing that light extraction end component 2, which includes the collimated light beam refractive transition of outgoing,
The focus lamp 21 of hot spot function, the output optical fiber 22 being connected with spectroanalysis instrument light path；Internal light path component 3 possesses phase by three
The light path Zigzag type long light path White pond formed with the spherical concave mirror of radius of curvature is filled the post of, the small Hes of concave mirror A 31 of two of which
A ' 32 physical dimension is identical, is mounted on one end of pond body 4 side by side, and big concave mirror B 33 is mounted on pond body 4
The other end, be characterised by：Described collimating mirror 12 is made up of the higher ultraviolet fused silica glass of deep ultraviolet band transmitance,
With the divergent shape light beam of light source refractive transition for carrying out incident optical transmission into the collimated light beam that will not be dissipated at least in 500mm
Function, the integral type non-spherical lens formed is interconnected by flat cylinder A 121 and outer gibbosity arc plane of refraction A 122 and filled
Appoint；Described focus lamp 21 is made up of the higher ultraviolet fused silica glass of deep ultraviolet band transmitance, has collimated light beam
For first refractive transition into converging beam, refocusing is transformed into diameter less than 3mm, the relatively small light spot for being easy to the output optical fiber 22 to receive in full
Function, by the flat-shaped cylinder A 211 of middle flat and the outer gibbosity arc plane of refraction positioned at the flat-shaped front and rear sides of cylinder A 211 of middle flat
The aspherical biconvex lens of integral type that B212 is formed is filled the post of；Concave mirror A two small described in described inside light path component 3
Plating reaches more than 90% provided with the reflectivity to deep ultraviolet band light respectively on 31 and A ' 32 and big concave mirror B 33 inner concave
Ultraviolet enhancing aluminium film.
Claims (1)
1. a kind of gas absorption cell light channel structure suitable for fume continuous monitoring system, mainly include light inputting end component（1）, go out
Light end component（2）Be arranged on pond body（4）The inside light path component of intracavitary（3）, wherein：Light inputting end component（1）Include with it is bright
The connected incident optical of lamp divergent shape light beam of light source light path（11）With with being directional light by divergent shape light beam of light source refractive transition
The collimating mirror of beam function（12）；Light extraction end component（2）It is emergent light spot function to include the collimated light beam refractive transition of outgoing
Focus lamp（21）, the output optical fiber that is connected with spectroanalysis instrument light path（22）；Internal light path component（3）Possessed by three identical
The light path Zigzag type long light path White pond that the spherical concave mirror of radius of curvature is formed is filled the post of, the small concave mirror A of two of which（31）With
A’（32）Physical dimension it is identical, be mounted on pond body side by side（4）One end, big concave mirror B（33）It is mounted on
Pond body（4）The other end, it is characterised in that：
Described collimating mirror（12）It is made up, has incident light of the higher ultraviolet fused silica glass of deep ultraviolet band transmitance
Fibre transmits next divergent shape light beam of light source refractive transition into the function for the collimated light beam that will not be dissipated at least in 500mm, by flat
Flat-shaped cylinder A（121）With outer gibbosity arc plane of refraction A（122）The integral type non-spherical lens that interconnection is formed is filled the post of；
Described focus lamp（21）It is made up, has directional light of the higher ultraviolet fused silica glass of deep ultraviolet band transmitance
Into converging beam, refocusing is transformed into diameter and is less than 3mm, is easy to the output optical fiber beam elder generation refractive transition（22）What is received in full is smaller
Hot spot function, by the flat-shaped cylinder A of middle flat（211）With positioned at the flat-shaped cylinder A of middle flat（211）The outer gibbosity arc of front and rear sides
Plane of refraction B（212）The aspherical biconvex lens of integral type of composition is filled the post of；
Described inside light path component（3）Described in concave mirror A two small（31）And A '（32）And big concave mirror B（33）It is interior
Plating reaches more than 90% ultraviolet enhancing aluminium film provided with the reflectivity to deep ultraviolet band light respectively on concave surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711416191.XA CN107884353A (en) | 2017-12-25 | 2017-12-25 | A kind of gas absorption cell light channel structure suitable for fume continuous monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711416191.XA CN107884353A (en) | 2017-12-25 | 2017-12-25 | A kind of gas absorption cell light channel structure suitable for fume continuous monitoring system |
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| CN107884353A true CN107884353A (en) | 2018-04-06 |
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| CN201711416191.XA Pending CN107884353A (en) | 2017-12-25 | 2017-12-25 | A kind of gas absorption cell light channel structure suitable for fume continuous monitoring system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956407A (en) * | 2018-09-21 | 2018-12-07 | 安徽农业大学 | A kind of optical path aggregation infrastructure |
| CN108956406A (en) * | 2018-09-21 | 2018-12-07 | 安徽农业大学 | A kind of smoke intensity detection optical system and its method |
| CN110596007A (en) * | 2019-09-25 | 2019-12-20 | 安徽理工大学 | Novel multi-element plane mirror optical multi-pass absorption tank |
| US11313779B2 (en) | 2019-03-26 | 2022-04-26 | Eaton Intelligent Power Limited | Liquid debris sensor and system |
| CN116908132A (en) * | 2023-09-05 | 2023-10-20 | 南京诺令生物科技有限公司 | Gas concentration detection device, adjustment method, and gas concentration detection system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636265A (en) * | 2012-04-17 | 2012-08-15 | 中国科学院合肥物质科学研究院 | Optical system based on portable efficient-measurement ultraviolet absorption spectrum |
| CN203479700U (en) * | 2013-09-25 | 2014-03-12 | 河南省日立信股份有限公司 | Fine-turning long path gas detection device |
| CN205593914U (en) * | 2016-05-03 | 2016-09-21 | 青岛海纳光电环保有限公司 | Portable gaseous pollutants concentration detection device |
-
2017
- 2017-12-25 CN CN201711416191.XA patent/CN107884353A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636265A (en) * | 2012-04-17 | 2012-08-15 | 中国科学院合肥物质科学研究院 | Optical system based on portable efficient-measurement ultraviolet absorption spectrum |
| CN203479700U (en) * | 2013-09-25 | 2014-03-12 | 河南省日立信股份有限公司 | Fine-turning long path gas detection device |
| CN205593914U (en) * | 2016-05-03 | 2016-09-21 | 青岛海纳光电环保有限公司 | Portable gaseous pollutants concentration detection device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956407A (en) * | 2018-09-21 | 2018-12-07 | 安徽农业大学 | A kind of optical path aggregation infrastructure |
| CN108956406A (en) * | 2018-09-21 | 2018-12-07 | 安徽农业大学 | A kind of smoke intensity detection optical system and its method |
| CN108956407B (en) * | 2018-09-21 | 2023-09-19 | 安徽农业大学 | Light path converging structure |
| CN108956406B (en) * | 2018-09-21 | 2023-09-19 | 安徽农业大学 | Smoke detection optical system and method thereof |
| US11313779B2 (en) | 2019-03-26 | 2022-04-26 | Eaton Intelligent Power Limited | Liquid debris sensor and system |
| EP3715830B1 (en) * | 2019-03-26 | 2024-01-03 | Eaton Intelligent Power Limited | System for detection of particles in fluids |
| CN110596007A (en) * | 2019-09-25 | 2019-12-20 | 安徽理工大学 | Novel multi-element plane mirror optical multi-pass absorption tank |
| CN116908132A (en) * | 2023-09-05 | 2023-10-20 | 南京诺令生物科技有限公司 | Gas concentration detection device, adjustment method, and gas concentration detection system |
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