CN207114412U - A kind of optoacoustic pool structure for total-reflection prism group increase light path of arranging in pairs or groups - Google Patents
A kind of optoacoustic pool structure for total-reflection prism group increase light path of arranging in pairs or groups Download PDFInfo
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- CN207114412U CN207114412U CN201721105514.9U CN201721105514U CN207114412U CN 207114412 U CN207114412 U CN 207114412U CN 201721105514 U CN201721105514 U CN 201721105514U CN 207114412 U CN207114412 U CN 207114412U
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Abstract
It the utility model is related to optoacoustic spectroscopy field of gas detection, especially a kind of optoacoustic pool structure for total-reflection prism group increase light path of arranging in pairs or groups, include the resonator of two surge chambers of two surge chambers and connection, air inlet is provided with one of surge chamber, is provided with gas outlet on another surge chamber, microphone is provided with resonator, and the side wall of microphone through resonator is connected with external；Two identical total reflection prisms are respectively arranged with the both ends of resonator, and two total reflection prism in the vertical directions have minor shifts；Being horizontally disposed with surge chamber has collimater, and incident direction alignment resonator, the light beam that collimater projects horizontal can be mapped on the prism of the resonator other end.A kind of optoacoustic pool structure of collocation total-reflection prism group increase light path obtained by the utility model, can just be emitted from resonator after multiple reflections, the light path of resonator is added by multiple reflections, so as to strengthen the photoacoustic signal in resonator.
Description
Technical field
Optoacoustic spectroscopy field of gas detection is the utility model is related to, especially a kind of collocation total-reflection prism group increase light path
Optoacoustic pool structure.
Background technology
Optoacoustic spectroscopy be based on optoacoustic effect by direct measurement material because absorb luminous energy and caused by heat energy one
Kind spectrum Calorimetric Techniques.When the gas in light intermittently radiation and seal container, sound wave generation, this phenomenon are had in container
The as optoacoustic effect of gas.Substantially, optoacoustic effect is due to periodicity caused by gas molecules sorb discontinuity luminous energy
Non-radiative relaxation processes, macroscopically show as the cyclically-varying of gas pressure.This pressure fluctuation just turns into sound wave, so as to
Perceived by acoustic sensor.The synchronized obtained electric signal that amplifies of acoustic signals that acoustic sensor is perceived is optical signal.If will
Photoacoustic signal is recorded as the function of incident light frequency, so that it may obtains Photoa-counstic spectra.Used here as to container be exactly
Photoacoustic cell.Yun Yuxin is in paper " Gases Dissolved in Transformer Oil on-line monitoring principle and method based on resonance optoacoustic spectroscopy "
（The P77-85 of University Of Chongqing Ph.D. Dissertation 2008）In propose a kind of longitudinal resonance photoacoustic cell.But prior art is total to
Shake photoacoustic cell light path it is too short, acoustic signals are too weak.
Utility model content
The purpose of this utility model be in order to solve above-mentioned technology deficiency and resonance in photoacoustic cell can be increased by providing one kind
The light path of chamber increases the optoacoustic pool structure of light path to strengthen the collocation total-reflection prism group of photoacoustic signal in resonator.
In order to achieve the above object, the optoacoustic of a kind of collocation total-reflection prism group increase light path designed by the utility model
Pool structure, include two surge chambers and connect the resonator of two surge chambers, air inlet, another is provided with one of surge chamber
Be provided with gas outlet on one surge chamber, be provided with microphone in resonator, and microphone through resonator side wall with it is outer
Connect connected；Two identical total reflection prisms are respectively arranged with the both ends of resonator, and two total reflection prisms are perpendicular
Nogata has minor shifts upwards；Being horizontally disposed with surge chamber has collimater, and incident direction alignment resonator, collimater are penetrated
The light beam gone out horizontal can be mapped on the prism of the resonator other end.
The cross section of total reflection prism is isosceles right triangle, and the face where the long side of isosceles right triangle is in
In the perpendicular at resonator both ends.
Wavelength is 200-4000nm optical fiber collimator centered on described collimater.
In above-mentioned technical proposal, under test gas is passed through into photoacoustic cell from entrance port, after concentration is stable, collimator will
The laser that laser is sent is collimated, and is incided in photoacoustic cell resonator, has minor shifts by two vertical direction
Total reflection prism carries out multiple reflections in resonator, is finally projected from prism group, and signal caused by gas absorption passes through micro-
Sound device receives.The multiple reflections of prism group substantially increase the light path of gas absorption, therefore the caused optoacoustic in resonator
Signal is significantly enhanced.
A kind of optoacoustic pool structure of collocation total-reflection prism group increase light path obtained by the utility model, two total reflections
Prism cross-section is isosceles right triangle, therefore according to the incident light beam meeting exiting parallel in the vertical base of geometrical principle, is passed through
It can be just emitted after multiple reflections from resonator, the distance dependent that the number of reflection is offset up with prism Vertical Square, offset distance
From smaller, number is more；The light path of resonator is added by multiple reflections, so as to strengthen the letter of the optoacoustic in resonator
Number.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Wherein：1 is air inlet, and 2 be gas outlet, and 3 be surge chamber, and 4 be collimater, and 5 be microphone, and 6 be resonator, and 7 are
Total reflection prism.
Embodiment
Below by embodiment combination accompanying drawing, the utility model will be further described.
Embodiment 1：
As shown in figure 1, a kind of optoacoustic pool structure of collocation total-reflection prism group increase light path of the present embodiment description, including
Two surge chambers 3 and the resonator 6 for connecting two surge chambers 3, air inlet 1 is provided with one of surge chamber 3, another is slow
Rush on room 3 and be provided with gas outlet 2, be provided with microphone 5 in resonator 6, and microphone 5 through resonator 6 side wall with it is outer
Connect connected；Two identical total reflection prisms 7 are respectively arranged with the both ends of resonator 6, and two total reflection prisms 7 exist
There are minor shifts on vertical direction；Being horizontally disposed with surge chamber 3 has collimater 4, and incident direction alignment resonator 6, accurate
The light beam that straight device 4 projects horizontal can be mapped on the prism of the other end of resonator 6.
The cross section of total reflection prism 7 is isosceles right triangle, and at the face where the long side of isosceles right triangle
In in the perpendicular at the both ends of resonator 6.
Wavelength is 1370nm optical fiber collimator 4 centered on described collimater 4, corresponding water vapor absorption peak.
Under test gas is passed through into photoacoustic cell from entrance port, after concentration is stable, collimator 4 swashs what laser was sent
Light is collimated, and is incided in photoacoustic cell resonator 6, and the total reflection prism 7 for having minor shifts by two vertical direction exists
Multiple reflections are carried out in resonator 6, are finally projected from prism group, signal caused by gas absorption is received by microphone 5.Rib
The multiple reflections of microscope group substantially increase the light path of gas absorption, therefore caused photoacoustic signal is also notable in resonator 6
Enhancing.
Embodiment 2：
A kind of optoacoustic pool structure of collocation total-reflection prism group increase light path of the present embodiment description, itself and embodiment 1
Difference is：Wavelength is 2000nm optical fiber collimator 4 centered on described collimater 4, corresponding carbon dioxide absworption peak.
Embodiment 3：
A kind of optoacoustic pool structure of collocation total-reflection prism group increase light path of the present embodiment description, itself and embodiment 1
Difference is：Wavelength is 760nm optical fiber collimator 4 centered on described collimater 4, corresponding oxygen absorption peak.
Claims (3)
1. a kind of optoacoustic pool structure for total-reflection prism group increase light path of arranging in pairs or groups, it is characterized in that：Including two surge chambers and connection
The resonator of two surge chambers, air inlet is provided with one of surge chamber, is provided with gas outlet on another surge chamber,
Microphone is provided with resonator, and the side wall of microphone through resonator is connected with external；Set respectively at the both ends of resonator
Two identical total reflection prisms are equipped with, and two total reflection prism in the vertical directions have minor shifts；Buffering
Indoor horizontal is provided with collimater, and incident direction alignment resonator, and it is another that the light beam energy level that collimater projects is mapped to resonator
On the prism of one end.
2. a kind of optoacoustic pool structure of total-reflection prism group increase light path of arranging in pairs or groups according to claim 1, it is characterized in that：Entirely
The cross section of reflecting prism is isosceles right triangle, and the face where the long side of isosceles right triangle is in resonator both ends
Perpendicular in.
3. a kind of optoacoustic pool structure of total-reflection prism group increase light path of arranging in pairs or groups according to claim 1, it is characterized in that：Institute
Wavelength is 200-4000nm optical fiber collimator centered on the collimater stated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721105514.9U CN207114412U (en) | 2017-08-31 | 2017-08-31 | A kind of optoacoustic pool structure for total-reflection prism group increase light path of arranging in pairs or groups |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721105514.9U CN207114412U (en) | 2017-08-31 | 2017-08-31 | A kind of optoacoustic pool structure for total-reflection prism group increase light path of arranging in pairs or groups |
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| CN207114412U true CN207114412U (en) | 2018-03-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507959A (en) * | 2018-06-01 | 2018-09-07 | 济南盛泰电子科技有限公司 | A kind of variable light path gas absorption gas chamber sensor-based system |
| WO2022267286A1 (en) * | 2021-06-22 | 2022-12-29 | 南方电网科学研究院有限责任公司 | Gas measurement apparatus |
-
2017
- 2017-08-31 CN CN201721105514.9U patent/CN207114412U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507959A (en) * | 2018-06-01 | 2018-09-07 | 济南盛泰电子科技有限公司 | A kind of variable light path gas absorption gas chamber sensor-based system |
| CN108507959B (en) * | 2018-06-01 | 2024-03-15 | 济南盛泰电子科技有限公司 | Variable optical path gas absorption air chamber sensing system |
| WO2022267286A1 (en) * | 2021-06-22 | 2022-12-29 | 南方电网科学研究院有限责任公司 | Gas measurement apparatus |
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