CN2786619Y - Single particle aerosol ultraviolet fluorescence analysis optical measuring equipment - Google Patents
Single particle aerosol ultraviolet fluorescence analysis optical measuring equipment Download PDFInfo
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- CN2786619Y CN2786619Y CN 200520072174 CN200520072174U CN2786619Y CN 2786619 Y CN2786619 Y CN 2786619Y CN 200520072174 CN200520072174 CN 200520072174 CN 200520072174 U CN200520072174 U CN 200520072174U CN 2786619 Y CN2786619 Y CN 2786619Y
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Abstract
The utility model discloses single particle aerosol ultraviolet fluorescence analysis optical measuring equipment, which comprises a laser, a nozzle (20) and a light detector which are on a light path of the laser, wherein the light path (21) of the laser (1) is orderly provided with a quarter of wave sheet (3), calcite (6), a cylindrical mirror (7) and one focus of an ellipsoidal mirror (9) for collecting scattered light especially. A light path (22) of an ultraviolet laser (12) is orderly provided with a cylindrical mirror (15) and one focus of an ellipsoidal mirror (16) for collecting fluorescence. The nozzle (20) is positioned on a common focus between the ellipsoidal mirror (9) and the ellipsoidal mirror (16), and the air injection direction of the nozzle passes through the light path (21) and the light path (22) which are parallel. An avalanche diode (10) which is used as a light detector is positioned on the other focus of the ellipsoidal mirror (9) for collecting scattered light, and a photomultiplier (18) is positioned on the other focus of the ellipsoidal mirror (16) for collecting fluorescence. The utility model can exactly count and measure the number, the size, the concentration and the distribution state of components of aerosol particles.
Description
Technical field the utility model relates to a kind of optical measuring device, and especially optical measuring device is analyzed in the Ultraluminescence of single-particle gasoloid.
Particulate in the background technology atmosphere is closely related with people's life, its size, concentration and composition are playing an important role aspect the living environment quality of determining people, and the organic principle in the particle influences the principal element of human health especially.Correctly understand distribution and the transmission of particulate in atmosphere, have important application for the selection of pollution prevention measure.At present, people measure and count for the distribution situation to size, concentration and the composition of particulate, often use light scattering device.It is made of the particulate nozzle, the photo-detector that set gradually on laser instrument and its output light path.During measurement,, by way of the output light path of laser instrument the time, will produce scattering to laser beam, thereby on photo-detector, reflect the characteristic of particulate by the particulate of nozzle ejection.But this device exists weak point, at first, surveys the size that scattered intensity is obtained particulate because of it only relies on, so the precision of measuring is not high, is difficult to accurately measure the definite size of particulate; Secondly, be subjected to the influence of the factors such as shape, size of particulate, make its measurement exist bigger error aerosol particle concentration; Once more, can not carry out on-the-spot real-time measurement to the composition of particulate, can only after sampling, draw the distribution character of particulate again through the subsequent analysis processing, belong to the non real-time on-line measurement, and this moment, variation took place in environmental baseline already, therefore, the source of polluting for identification, hazard level, Rapid Alarm and reaction in time all can't be accomplished real-time response.
The summary of the invention the technical problems to be solved in the utility model provides single-particle gasoloid Ultraluminescence a kind of simple in structure, practical, easy to use to analyze optical measuring device for overcoming weak point of the prior art.
The technical scheme that is adopted comprises on the light path of nozzle, photo-detector, particularly laser instrument on laser instrument and its light path and is disposed with the focus that quarter wave plate, kalzit, cylindrical mirror and scattered light are collected ellipsoidal mirror; Be disposed with a focus of cylindrical mirror and phosphor collection ellipsoidal mirror on the light path of ultraviolet laser; Said scattered light is collected a focus of ellipsoidal mirror and a focus of said phosphor collection ellipsoidal mirror is confocal point, and said nozzle is positioned at this confocal some place, and its jet direction is to pass the parallel two-beam road of laser instrument and the light path of ultraviolet laser; Said photo-detector is avalanche diode and photomultiplier, and said avalanche diode is positioned at another focus place that scattered light is collected ellipsoidal mirror, and said photomultiplier is positioned at another focus place of phosphor collection ellipsoidal mirror.
As the further improvement of technical scheme, described laser instrument is a diode laser, and ultraviolet laser is a ultraviolet pulse laser; Be equipped with collimation lens on the light path between described laser instrument and quarter wave plate; Be equipped with negative lens and positive lens on the light path between described quarter wave plate and kalzit; Cylindrical mirror on cylindrical mirror on the described laser light path and the ultraviolet laser light path is negative cylindrical mirror; Be equipped with catoptron and window on the light path behind the cylindrical mirror on the described laser light path successively; Be equipped with catoptron and positive lens on the light path between the cylindrical mirror on described ultraviolet laser and the ultraviolet laser light path, the catoptron pairing on the light path behind the cylindrical mirror on this catoptron and the laser light path is provided with; Be equipped with bandpass filter on the light path between described photomultiplier and phosphor collection ellipsoidal mirror; The perpendicular setting of transmission direction of the light path of the jet direction of described nozzle and the light path of laser instrument and ultraviolet laser; Be equipped with optical beam dump on the light path of the laser instrument behind the described nozzle.
Beneficial effect with respect to prior art is, one, the quarter wave plate that sets gradually on the laser instrument output light path, kalzit and cylindrical mirror, make laser beam through changing circularly polarized light into by linearly polarized light earlier thereafter, again by being divided into the two bundle directional lights that intensity equates behind the kalzit, the expansion that all upwards is stretched of last this two bundles directional light in the perpendicular footpath of light path and the jet direction of nozzle, restraint parallel Gaussian beam and form two of flat ellipse, thereby the movement locus that has guaranteed the particulate that sprays in the nozzle can drop in the focal spot on this two-beam road all the time, scattered intensity and the travel time number that both obtained particulate when making the Gaussian beam that the utility model can pass this two bundles flat ellipse according to particulate, again simultaneously because of obtain the particulate of the different size of identical power at spout, because its inertia difference, the time of flight is just variant, and obtain the definite size of particulate thus, also can therefore know the CONCENTRATION DISTRIBUTION situation of particulate, and provide the trigger pip of ultraviolet pulse laser simultaneously; They are two years old, adopt ellipsoidal mirror to collect scattered light, the interaction area of the two-beam parallel laser of particle detection and particulate is positioned at a focus of ellipsoidal mirror, the scattered light of particle is focused at the another one focus by ellipsoidal mirror, and in this focus place arrangement photo-detector avalanche diode, obtained best light scattering signal, improved widely and survey the aerocolloidal sensitivity of small-particle; They are three years old, in like manner, a focus of cylindrical mirror that sets gradually on the light path of ultraviolet laser and phosphor collection ellipsoidal mirror, above-mentioned in addition scattered light is collected a focus of ellipsoidal mirror and a focus of this phosphor collection ellipsoidal mirror is confocal point, and nozzle is positioned at this confocal some place, its jet direction be pass the two-beam road of the parallel expansion that upwards is stretched in the footpath of laser instrument and ultraviolet laser by the cylindrical mirror on its light path with upwards the be stretched light path of expansion of the perpendicular footpath of the jet direction of nozzle, and be positioned at another focus place of phosphor collection ellipsoidal mirror again as the photomultiplier of photodetector, make its decapacitation accurately obtain the size and the CONCENTRATION DISTRIBUTION situation of particulate, can also assemble the composition information that obtains particulate to photomultiplier immediately by the phosphor collection ellipsoidal mirror because of Ultra-Violet Laser excites single-particle gasoloid fluorescence; Its four, the employing of collimation lens and negative lens, positive lens can make laser beam be easy to focus on the basis that forms the less angle of divergence, is beneficial to follow-up beam splitting; They are five years old, use negative cylindrical mirror, make two bundle directional lights of laser instrument be drawn into two partly overlapping flat ellipse Gaussian beams, the light beam of ultraviolet laser is drawn into the flat ellipse Gaussian beam, the major axis of the Gaussian beam of this three beams flat ellipse is all greater than nozzle of air supply, and the central shaft of nozzle of air supply is a symcenter with this major axis, so can avoid disturbance because of air-flow to make the particulate of same size when movement locus has small skew behind the outgoing spout, still can record the flight time of particulate, avoid the miscount that produces that departs from of particle movement track that particle causes because of the disturbance of air-flow; They are six years old, two catoptrons on be placed in laser light path and the ultraviolet laser light path are used in pairing, both made complete machine simple in structure, volume is little, can be used for adjusting the distance between two parallel beams of the light beam of ultraviolet laser and laser instrument again, make ultraviolet pulse laser obtain the relative trigger signal by the size of this distance; Its seven, be arranged on the window between catoptron and two ellipsoidal mirrors, guaranteed the isolation in beam shaping district and gasoloid sample introduction district, both kept sample cavity to have certain air pressure, can avoid the pollution of particulate again to the optical element in the beam shaping district; Its eight, the interference to photomultiplier of the scattered light of laser instrument and Ultra-Violet Laser has been stopped in the use of the bandpass filter between photomultiplier and phosphor collection ellipsoidal mirror, has avoided the influence that fluorescence signal is surveyed; Its nine, the perpendicular setting of transmission direction of the jet direction of nozzle and light path has promoted the efficient of surveying and has reduced error rate; Its ten, the optical beam dump that the end of laser light path is provided with has been eradicated useless laser to the interference of photo-detector with to the optical radiation damage of other optical component.
Description of drawings is described in further detail optimal way of the present utility model below in conjunction with accompanying drawing.
Fig. 1 is a kind of basic structure synoptic diagram of the present utility model.
Embodiment is referring to Fig. 1, as being disposed with collimation lens 2 on the diode laser of laser instrument 1 and the light path 21 thereof, quarter wave plate 3, negative lens 4, positive lens 5, kalzit 6, negative cylindrical mirror as cylindrical mirror 7, catoptron 8, window 19, scattered light is collected the focus and the optical beam dump 11 of ellipsoidal mirror 9, as being disposed with catoptron 13 on the ultraviolet pulse laser of ultraviolet laser 12 and the light path 22 thereof, positive lens 14, negative cylindrical mirror as cylindrical mirror 15, catoptron 8, window 19, focus of phosphor collection ellipsoidal mirror 16 and optical beam dump 11, wherein, catoptron 13 is provided with catoptron 8 pairings.Aforementioned scattered light is collected a focus of ellipsoidal mirror 9 and a focus overlaid of phosphor collection ellipsoidal mirror 16, is confocal point.Another focus place that scattered light is collected ellipsoidal mirror 9 is equipped with avalanche diode 10, and another focus place of phosphor collection ellipsoidal mirror 16 is equipped with photomultiplier 18, is equipped with bandpass filter 17 on the light path 22 of 18 on phosphor collection ellipsoidal mirror 16 and photomultiplier.Be positioned at scattered light collect the confocal some place of ellipsoidal mirror 9 and phosphor collection ellipsoidal mirror 16 be equipped with jet direction pass parallel two-beam road 21 and light path 22 and with the perpendicular nozzle 20 of the transmission direction of light path (21,22).
During use, the linearly polarized laser bundle that diode laser is launched behind collimation lens 2, forms the less uniform beam of the angle of divergence along light path 21 elder generations; This light beam is transformed into circularly polarized light through quarter wave plate 3 again.Afterwards, this circularly polarized light focuses on through negative lens 4 and positive lens 5 earlier; Be divided into focused spot diameter through kalzit 6 again and be the two bundle directional lights that 60 μ m, spacing are 80 μ m; The back by negative cylindrical mirror with this two bundles directional light all its optical axis with the expansion that upwards is stretched of the perpendicular footpath of the jet direction of nozzle, and each self-forming xsect is the Gaussian beam of the flat ellipse of major axis 1mm, minor axis 60 μ m.The UV laser beam that ultraviolet pulse laser sends is reflected by catoptron 13 after positive lens 14 focuses on, its focus is positioned at the focus rear 1mm of the diode laser bundle at nozzle 20 places, focused spot diameter is 60 μ m, by negative cylindrical mirror with UV laser beam its optical axis with the expansion that upwards is stretched of the perpendicular footpath of the jet direction of nozzle, the formation xsect is the Gaussian beam of the flat ellipse of major axis 1mm, minor axis 60 μ m.Two parallel flat ellipse Gaussian beams of bundle that are transformed into by diode laser and the flat ellipse Gaussian beam that is transformed into by Ultra-Violet Laser are in the way of directive avalanche diode 10 and photomultiplier 18 respectively, collect the confocal some place of ellipsoidal mirror 9 and phosphor collection ellipsoidal mirror 16 through scattered light, and meet with the particulate of nozzle 20 ejection that places this focus place, by particulate with its scattering; Be positioned at scattered light and collect the avalanche diode 10 at ellipsoidal mirror 9 another focus places and will successively collect the scattered light of each particulate twice, and transfer to subsequent parts and obtain the definite size of this particulate and all number and the CONCENTRATION DISTRIBUTION situation of particulates according to the time difference between the strong and weak of its output signal and twice same intensity signal; And the photomultiplier 18 that is positioned at phosphor collection ellipsoidal mirror 16 another focus places will be collected the fluorescence of each particulate after avalanche diode 10 is collected each particulate scattered light, and transfer to subsequent parts and know corresponding composition according to the signal of its output.At last, this three beams flat ellipse Gaussian beam absorbs by optical beam dump 11.
Obviously, those skilled in the art can analyze optical measuring device to single-particle gasoloid Ultraluminescence of the present utility model and carries out various changes and modification and do not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (10)
1, optical measuring device is analyzed in a kind of single-particle gasoloid Ultraluminescence, comprises nozzle (20), photo-detector on laser instrument and its light path, it is characterized in that:
1.1, be disposed with the focus that quarter wave plate (3), kalzit (6), cylindrical mirror (7) and scattered light are collected ellipsoidal mirror (9) on the light path (21) of laser instrument (1);
1.2, be disposed with a focus of cylindrical mirror (15) and phosphor collection ellipsoidal mirror (16) on the light path (22) of ultraviolet laser (12);
1.3, said scattered light collects focus of ellipsoidal mirror (9) and a focus of said phosphor collection ellipsoidal mirror (16) is confocal point, said nozzle (20) is positioned at this confocal some place, and its jet direction is to pass parallel two-beam road (21) and light path (22);
1.4, said photo-detector is avalanche diode (10) and photomultiplier (18), said avalanche diode (10) is positioned at another focus place that scattered light is collected ellipsoidal mirror (9), and said photomultiplier (18) is positioned at another focus place of phosphor collection ellipsoidal mirror (16).
2, optical measuring device is analyzed in single-particle gasoloid Ultraluminescence according to claim 1, it is characterized in that laser instrument (1) is a diode laser, and ultraviolet laser (12) is a ultraviolet pulse laser.
3, optical measuring device is analyzed in single-particle gasoloid Ultraluminescence according to claim 1, it is characterized in that being equipped with collimation lens (2) on the light path (21) between laser instrument (1) and quarter wave plate (3).
4, optical measuring device is analyzed in single-particle gasoloid Ultraluminescence according to claim 1, it is characterized in that being equipped with on the light path (21) between quarter wave plate (3) and kalzit (6) negative lens (4) and positive lens (5).
5, optical measuring device is analyzed in single-particle gasoloid Ultraluminescence according to claim 1, it is characterized in that cylindrical mirror (7,15) is negative cylindrical mirror.
6, optical measuring device is analyzed in single-particle gasoloid Ultraluminescence according to claim 1, it is characterized in that being equipped with catoptron (8) and window (19) successively on the light path (21) behind the cylindrical mirror (7).
7, optical measuring device is analyzed in single-particle gasoloid Ultraluminescence according to claim 6, it is characterized in that being equipped with on the light path (22) between ultraviolet laser (12) and cylindrical mirror (15) catoptron (13) and positive lens (14), said catoptron (13) is provided with catoptron (8) pairing.
8, optical measuring device is analyzed in single-particle gasoloid Ultraluminescence according to claim 1, it is characterized in that being equipped with bandpass filter (17) on the light path (22) between photomultiplier (18) and phosphor collection ellipsoidal mirror (16).
9, optical measuring device is analyzed in single-particle gasoloid Ultraluminescence according to claim 1, it is characterized in that the perpendicular setting of transmission direction of the jet direction and the light path (21,22) of nozzle (20).
10, optical measuring device is analyzed in single-particle gasoloid Ultraluminescence according to claim 1, it is characterized in that being equipped with optical beam dump (11) on the light path (21) behind the nozzle (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520072174 CN2786619Y (en) | 2005-05-20 | 2005-05-20 | Single particle aerosol ultraviolet fluorescence analysis optical measuring equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520072174 CN2786619Y (en) | 2005-05-20 | 2005-05-20 | Single particle aerosol ultraviolet fluorescence analysis optical measuring equipment |
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| CN2786619Y true CN2786619Y (en) | 2006-06-07 |
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| CN 200520072174 Expired - Fee Related CN2786619Y (en) | 2005-05-20 | 2005-05-20 | Single particle aerosol ultraviolet fluorescence analysis optical measuring equipment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297824A (en) * | 2011-05-18 | 2011-12-28 | 北京汇丰隆经济技术开发有限公司 | Single light source bio-aerosol particle detecting apparatus |
| CN104931471A (en) * | 2015-06-08 | 2015-09-23 | 北京大学 | Laser induced fluorescence detection system for active free radicals in air |
| WO2015180227A1 (en) * | 2014-05-28 | 2015-12-03 | 南京大学 | Multichannel aerosol scattering-absorbing measuring instrument |
| CN105466822A (en) * | 2016-02-06 | 2016-04-06 | 无锡迈通科学仪器有限公司 | Real-time aerosol monitor |
| CN107884372A (en) * | 2017-09-30 | 2018-04-06 | 维科托（北京）科技有限公司 | For the incidence system of atomic fluorescence detection device and the mounting bracket of excitation source |
| WO2018076244A1 (en) * | 2016-10-27 | 2018-05-03 | 西安精英光电技术有限公司 | Ellipsoidal mirror-based biofluorescence capturing structure and capturing method |
| CN113916783A (en) * | 2021-10-13 | 2022-01-11 | 丹东百特仪器有限公司 | Optical method for detecting toxic substances based on time flight method |
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2005
- 2005-05-20 CN CN 200520072174 patent/CN2786619Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297824A (en) * | 2011-05-18 | 2011-12-28 | 北京汇丰隆经济技术开发有限公司 | Single light source bio-aerosol particle detecting apparatus |
| WO2015180227A1 (en) * | 2014-05-28 | 2015-12-03 | 南京大学 | Multichannel aerosol scattering-absorbing measuring instrument |
| US9772278B2 (en) | 2014-05-28 | 2017-09-26 | Nanjing University | Multi-channel aerosol scattering absorption measuring instrument |
| CN104931471A (en) * | 2015-06-08 | 2015-09-23 | 北京大学 | Laser induced fluorescence detection system for active free radicals in air |
| CN105466822A (en) * | 2016-02-06 | 2016-04-06 | 无锡迈通科学仪器有限公司 | Real-time aerosol monitor |
| WO2017133045A1 (en) * | 2016-02-06 | 2017-08-10 | 无锡迈通科学仪器有限公司 | Aerosol real time monitor |
| CN105466822B (en) * | 2016-02-06 | 2018-03-06 | 无锡迈通科学仪器有限公司 | Aerosol real-time monitor |
| US10168269B1 (en) | 2016-02-06 | 2019-01-01 | Wuxi Maitong Scientific Instrument Co., Ltd. | Aerosol real time monitor |
| WO2018076244A1 (en) * | 2016-10-27 | 2018-05-03 | 西安精英光电技术有限公司 | Ellipsoidal mirror-based biofluorescence capturing structure and capturing method |
| CN107884372A (en) * | 2017-09-30 | 2018-04-06 | 维科托（北京）科技有限公司 | For the incidence system of atomic fluorescence detection device and the mounting bracket of excitation source |
| CN113916783A (en) * | 2021-10-13 | 2022-01-11 | 丹东百特仪器有限公司 | Optical method for detecting toxic substances based on time flight method |
| CN113916783B (en) * | 2021-10-13 | 2023-11-24 | 丹东百特仪器有限公司 | Optical method for detecting toxic substances based on time-of-flight method |
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Granted publication date: 20060607 |