CN106596408A - Triangular structure-based long range spectral absorption cell - Google Patents
Triangular structure-based long range spectral absorption cell Download PDFInfo
- Publication number
- CN106596408A CN106596408A CN201710016679.7A CN201710016679A CN106596408A CN 106596408 A CN106596408 A CN 106596408A CN 201710016679 A CN201710016679 A CN 201710016679A CN 106596408 A CN106596408 A CN 106596408A
- Authority
- CN
- China
- Prior art keywords
- triangular
- speculum
- triangle
- spectral absorption
- range spectral
- 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.)
- Pending
Links
Classifications
-
- 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
- G01N21/03—Cuvette constructions
- G01N21/0303—Optical path conditioning in cuvettes, e.g. windows; adapted optical elements or systems; path modifying or adjustment
Abstract
The invention discloses a triangular structure-based long range spectral absorption cell. The triangular structure-based long range spectral absorption cell comprises a triangular pedestal and a triangular sealing top cover which are mutually correspondingly arranged and folded, the middle portions of the triangular pedestal and a triangular sealing top cover are respectively provided with mounting holes used for mounting an inlet joint and an outlet joint, a triangular reflector composed of a first reflection mirror, a second reflection mirror and a third reflection mirror is arranged between the triangular pedestal and the triangular sealing top cover, the first reflection mirror is provided with light transmission holes, and the triangular reflector, the triangular pedestal and the triangular sealing top cover are mounted in a sealing manner through triangular sealing gaskets at two sides of the triangular reflector. The long range spectral absorption cell effectively avoids the interference effect of lights, fully uses the effective mirror area of the reflector, and substantially improves the reflection frequency of the lights in the absorption cells, so the effective absorption light distance of the lights is realized; and the absorption cell has the advantages of light integral weight, small size, low consumption of a sampled gas, fast gas flow response speed, simplicity in light distance adjustment, and low cost.
Description
Technical field：
The present invention relates to the photoelectric detection technology field such as laser spectrum tech, relates generally to a kind of long-range based on triangular structure
Spectral absorption pond.
Background technology：
As the problem of environmental pollution that the fast development of global industry process causes is increasingly serious, seriously threaten people's
It is healthy.At present, global environment and climate change has become countries in the world question of common concern, even more various countries it is ecological,
Biogeochemistry and the focus and advanced subject of the research of environmental science circle.Quantitatively study atmospheric greenhouse gas or trace gas
The content of body, contributes to us and predicts its following variation tendency and climate change.Laser absorption spectroscopy has highly sensitive
The advantages of degree, high accuracy, high selectivity, fast response time, it is widely used to atmospheric trace gas detection, industrial process control
Industry and the fields such as system, urban pollution resource exhausting control.Effective light path in optical absorption pond is to determine in laser absorption spectroscopy
Determine one of Primary Component of system detectio sensitivity.At present, logical absorption cell is mainly based upon and for incident light to be limited in two more than optics
It is individual or it is multiple be coated with roundtrip between highly reflecting films speculum, so as to increase the original of the effective light path of light-matter interaction
Reason, i.e., by increasing detected uptake of the molecule to incident light, obtain the absorption spectrum signal of high s/n ratio, realizes ppm
(parts per million)-ppb (parts per billion) even lower (ppt, the parts per of magnitude
Trillion detection sensitivity).Traditional long-range absorption cell design mainly has：Waveguide type, integration ball-type, White types,
Herriott types, and Chernin types, wait similar structures.There is minute surface effective area in the design overall of such long-range absorption cell
Utilization rate is low, or volume is big and the various deficiencies such as optical path adjusting complexity, so as to be difficult to realize obtain in miniaturization structure compared with
High order of reflection, and it is unfavorable for the portable sensor system integration.
The content of the invention：
The object of the invention is exactly to make up the defect of prior art, there is provided a kind of long-range spectral absorption based on triangular structure
Pond, whole device simple structure is reasonable in design and easily realize different size of effective light path, and small volume, optical path adjusting was operated
Journey is simple.
The present invention is achieved by the following technical solutions：
A kind of long-range spectral absorption pond based on triangular structure, it is characterised in that：Include mutually correspondence and install the three of pairing
Installation is respectively provided with the middle part of angular base and triangle top pressure closure, the triangle base and triangle top pressure closure
Have the installing hole of inlet-outlet connector, be provided between the triangle base and triangle top pressure closure by the first speculum,
Two-mirror and the 3rd speculum group into triangular mirror, first speculum is provided with loophole, the triangle
Speculum is installed by the delta ring sealing gasket piece of its both sides with triangle base and the sealing of triangle top pressure closure.
Described triangle base and three turnings of triangle top pressure closure has respectively three screwed holes, and by screw
It is locked.
Described triangle base and the medial surface of triangle top pressure closure is respectively provided with clamp delta ring sealing gasket
The triangular groove of piece.
Described the first speculum, the second speculum and the 3rd speculum are rectangular planes optical mirror slip, its interior table
Face is coated with high reflection golden film or high reflection silverskin, and its length of side is equal, constitutes the triangular mirror of an equilateral triangle.
The inner surface of the first described speculum leaves three loopholes, and aperture radius are 2 millimeters, and difference is at its center
And both sides of the edge.
The corner that described the first speculum, the second speculum and the 3rd speculum are mutually linked passes through respectively compensation block
Realize sealed coupling.
Its principle is：There is the loophole of three about 2 millimeters of radiuses respectively by the center and peripheral both sides of the first speculum,
By the way of the long-range spectral absorption pond of triangular structure is using series connection, incident beam is with certain incidence angle from the first reflection
The center loophole of mirror is entered in absorption cell and reaches the second speculum, and the 3rd speculum is reached after being reflected by the second speculum, then
First speculum is reflected back into by the 3rd speculum, it is such, through the n-th (n>1, order of reflection is related to incident angle)
After secondary roundtrip, finally transmit away from the side loophole of the first speculum.
It is an advantage of the invention that：
It is of the invention with it is traditional based on single cylindrical absorbent pond compared with, physical length improves three times, and the reflection based on light is former
Reason, is prevented effectively from the interference effect of light, takes full advantage of the minute surface effective area of speculum, significantly improves light in absorption cell
Order of reflection, so as to realize improve light effective absorption light path；Absorption cell overall weight is light, small volume, sample gas consumption
Low, air-flow fast response time, optical path adjusting is easy, with low cost.
Description of the drawings：
Fig. 1 is the configuration schematic diagram of the present invention.
Fig. 2 is the optical transport schematic diagram of the triangular mirror of the present invention.
Specific embodiment：
Referring to accompanying drawing.
A kind of long-range spectral absorption pond based on triangular structure, includes the triangle base that mutually correspondence installs pairing
1 and the middle part of triangle top pressure closure 2, triangle base 1 and triangle top pressure closure 2 be respectively provided with import and export be installed
The installing hole 14,15 of joint 11,12, be provided between triangle base 1 and triangle top pressure closure 2 by the first speculum 3,
The triangular mirror of two-mirror 4 and the composition of the 3rd speculum 5, first speculum 3 is provided with loophole, and triangle is anti-
Penetrate mirror to install with triangle base 1 and the sealing of triangle top pressure closure 2 by the delta ring sealing gasket piece 6,7 of its both sides.
Described triangle base 1 and three turnings of triangle top pressure closure 2 has respectively three screwed holes 10, and passes through
Screw 9 is locked.Described triangle base 1 and the medial surface of triangle top pressure closure 2 is respectively provided with clamp triangle
The triangular groove 13 of shape gasket seal 6,7.
Described the first speculum 3, the second speculum 4 and the 3rd speculum 5 are rectangular planes optical mirror slip, in it
Surface is coated with high reflection golden film or high reflection silverskin, and its length of side is equal, constitutes the triangular mirror of an equilateral triangle.Institute
The inner surface of the first speculum 3 stated leaves three loopholes, and aperture radius are 2 millimeters, respectively at its center and two sides
Edge.The corner that described the first speculum 3, the second speculum 4 and the 3rd speculum 5 are mutually linked passes through respectively compensation block 8
Realize sealed coupling.
Three described rectangular planes speculum length of sides are 48 millimeters, the center and peripheral both sides point of the first speculum 3
There is not the loophole of three about 2 millimeters of radiuses, incident beam is entered with 1 degree of incidence angle from the center loophole of the first speculum 3
Enter absorption cell and reach the second speculum 4, the 3rd speculum 5 is reached after being reflected by the second speculum 4, then it is anti-by the 3rd speculum 5
It is emitted back towards to the first speculum 3, it is such, through the n-th (n>1) after secondary roundtrip, finally from the side of the first speculum 3
Loophole is transmitted away, finally can receive transmitted light by photodetection.The gaseous sample for being detected can pass through gas circulator
By gas from ventilation hole connector 11 suction prior absorbent pond, then absorption cell is flowed out by ventilation hole connector 15.
Claims (6)
1. a kind of long-range spectral absorption pond based on triangular structure, it is characterised in that：Include mutually correspondence and pairing is installed
Peace is respectively provided with the middle part of triangle base and triangle top pressure closure, the triangle base and triangle top pressure closure
Installing hole equipped with inlet-outlet connector, be provided between the triangle base and triangle top pressure closure by the first speculum,
Second speculum and the 3rd speculum group into triangular mirror, first speculum is provided with loophole, the triangle
The delta ring sealing gasket piece by its both sides of shape speculum is installed with triangle base and the sealing of triangle top pressure closure.
2. the long-range spectral absorption pond based on triangular structure according to claim 1, it is characterised in that：Described triangle
There are respectively three screwed holes at three turnings of shape base and triangle top pressure closure, and are fixed by screw lock.
3. the long-range spectral absorption pond based on triangular structure according to claim 1, it is characterised in that：Described triangle
The medial surface of shape base and triangle top pressure closure is respectively provided with the triangular groove of clamp delta ring sealing gasket piece.
4. the long-range spectral absorption pond based on triangular structure according to claim 1, it is characterised in that：Described first
Speculum, the second speculum and the 3rd speculum are rectangular planes optical mirror slip, its inner surface be coated with high reflection golden film or
High reflection silverskin, its length of side is equal, constitutes the triangular mirror of an equilateral triangle.
5. the long-range spectral absorption pond based on triangular structure according to claim 1, it is characterised in that：Described first
The inner surface of speculum leaves three loopholes, and aperture radius are 2 millimeters, respectively at its center and both sides of the edge.
6. the long-range spectral absorption pond based on triangular structure according to claim 4, it is characterised in that：Described first
The corner that speculum, the second speculum and the 3rd speculum are mutually linked realizes sealed coupling by compensation block respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710016679.7A CN106596408A (en) | 2017-01-10 | 2017-01-10 | Triangular structure-based long range spectral absorption cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710016679.7A CN106596408A (en) | 2017-01-10 | 2017-01-10 | Triangular structure-based long range spectral absorption cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106596408A true CN106596408A (en) | 2017-04-26 |
Family
ID=58583170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710016679.7A Pending CN106596408A (en) | 2017-01-10 | 2017-01-10 | Triangular structure-based long range spectral absorption cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106596408A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991239A (en) * | 2017-11-27 | 2018-05-04 | 上海泽泉科技股份有限公司 | One kind measurement container, measuring system and measuring method |
| CN110596005A (en) * | 2019-09-25 | 2019-12-20 | 安徽理工大学 | Novel annular flat concave mirror optical multi-pass absorption pool |
| CN110596006A (en) * | 2019-09-25 | 2019-12-20 | 安徽理工大学 | Novel folding-shaped optical multi-pass absorption cell |
| CN110687048A (en) * | 2019-09-25 | 2020-01-14 | 安徽理工大学 | Novel multi-element annular plane mirror optical multi-pass absorption cell |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008505495A (en) * | 2004-06-29 | 2008-02-21 | サイマー インコーポレイテッド | Method and apparatus for reducing coherence of output light of gas discharge laser |
| US8328393B2 (en) * | 2006-12-28 | 2012-12-11 | Seiko Epson Corporation | Light source device having wavelength conversion and separation means, and projector |
| CN104111226A (en) * | 2014-08-07 | 2014-10-22 | 中国科学院上海微系统与信息技术研究所 | Small-size and long-optical-path optical cavity for gas detection |
| CN105445195A (en) * | 2014-12-17 | 2016-03-30 | 邓文平 | Sample measuring cell |
| CN205593910U (en) * | 2016-03-24 | 2016-09-21 | 青岛海纳光电环保有限公司 | Gas absorption pond |
-
2017
- 2017-01-10 CN CN201710016679.7A patent/CN106596408A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008505495A (en) * | 2004-06-29 | 2008-02-21 | サイマー インコーポレイテッド | Method and apparatus for reducing coherence of output light of gas discharge laser |
| US8328393B2 (en) * | 2006-12-28 | 2012-12-11 | Seiko Epson Corporation | Light source device having wavelength conversion and separation means, and projector |
| CN104111226A (en) * | 2014-08-07 | 2014-10-22 | 中国科学院上海微系统与信息技术研究所 | Small-size and long-optical-path optical cavity for gas detection |
| CN105445195A (en) * | 2014-12-17 | 2016-03-30 | 邓文平 | Sample measuring cell |
| CN205593910U (en) * | 2016-03-24 | 2016-09-21 | 青岛海纳光电环保有限公司 | Gas absorption pond |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991239A (en) * | 2017-11-27 | 2018-05-04 | 上海泽泉科技股份有限公司 | One kind measurement container, measuring system and measuring method |
| CN110596005A (en) * | 2019-09-25 | 2019-12-20 | 安徽理工大学 | Novel annular flat concave mirror optical multi-pass absorption pool |
| CN110596006A (en) * | 2019-09-25 | 2019-12-20 | 安徽理工大学 | Novel folding-shaped optical multi-pass absorption cell |
| CN110687048A (en) * | 2019-09-25 | 2020-01-14 | 安徽理工大学 | Novel multi-element annular plane mirror optical multi-pass absorption cell |
| CN110687048B (en) * | 2019-09-25 | 2022-01-11 | 安徽理工大学 | Multi-element annular plane mirror optical multi-pass absorption pool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106596408A (en) | Triangular structure-based long range spectral absorption cell | |
| CN204613085U (en) | A kind of absorption air chamber of adjustable light path | |
| EP3751255A2 (en) | Gas detection using differential path length measurement | |
| GB2323923A (en) | Device for measurement of infrared absorption of gases | |
| CN202916049U (en) | Diffusion-type SF6 gas leakage monitoring device | |
| CN115127673A (en) | Gas detector system with ring reflector | |
| CN103293139B (en) | A kind of sensing device of fluorescence explosive detection instrument | |
| CN109342348A (en) | A kind of binary channels infrared gas sensor | |
| CN205786294U (en) | The many gas-detecting devices of multiband | |
| CN206479447U (en) | A kind of gas measurement device | |
| CN109374536A (en) | Ozone concentration measurement device and method | |
| CN209606313U (en) | The device of sulfur dioxide and nitrogen dioxide in surrounding air is detected simultaneously | |
| WO2023009605A1 (en) | Differential path length sensing using monolithic, dual-wavelength light emitting diode | |
| CN105319176A (en) | Four-series non-dispersive infrared gas sensor | |
| CN212008293U (en) | Gas measuring chamber with ultra-long optical path | |
| CN114486796A (en) | NDIR multi-component gas detection module | |
| CN209182234U (en) | A kind of binary channels infrared gas sensor | |
| CN102778441A (en) | High-precision infrared gas sensor with bent pipe optical cavity gas chamber | |
| CN209264552U (en) | Ozone concentration measurement device | |
| TWI513973B (en) | Gas concentration detection device | |
| TWI592647B (en) | Gas detection device and method for detecting gas concentration | |
| CN109781639B (en) | Device and method for simultaneously detecting sulfur dioxide and nitrogen dioxide in ambient air | |
| CN216646257U (en) | Non-dispersive ultraviolet-infrared combined gas concentration measuring device | |
| CN220040238U (en) | Long-optical-path optical gas absorption cell and gas sensor | |
| US11821836B2 (en) | Fully compensated optical gas sensing system and apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170426 |