CN206618658U - A kind of particle device for fast detecting - Google Patents
A kind of particle device for fast detecting Download PDFInfo
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- CN206618658U CN206618658U CN201720040259.8U CN201720040259U CN206618658U CN 206618658 U CN206618658 U CN 206618658U CN 201720040259 U CN201720040259 U CN 201720040259U CN 206618658 U CN206618658 U CN 206618658U
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Abstract
The utility model discloses a kind of particle device for fast detecting.Including the illumination optical and detection device for collecting Simulated dynamic scattering light signals parallel by particulate samples dispersal device of the candidate particles sample dispersion into space and for building multiple sampling bodies, it specifically may include broadband low-coherence light source, optical circulator, fiber coupler, two Polarization Controllers, three optical fiber collimating devices, condenser lens, plane high reflection mirror, scanning galvanometer, object lens, sample dispersion unit, grating, Fourier transform lens and high speed linear array camera.The utility model contributes to real-time detection, has spatial resolving power to the detection of particle, can be used in determining the particle motion feature of spatial discrimination.
Description
Technical field
The utility model belongs to field of optical measuring technologies, more particularly to a kind of particle device for fast detecting, available for work
The information such as size, viscosity of particle of detection sub-micron and nanometer scale in terms of industry production.
Background technology
Particle, these tiny dispersed substances, with stastus formats such as solid, gas and liquid, be prevalent in nature,
The every aspect such as manufacturing process and mankind's daily life.Information and the materials such as dimension information (granularity), the viscosity of particle or
The performance of product and quality are closely related, or even have great influence to the health of environmental quality and the mankind.Therefore, it is possible to accurate
Rapidly detect and obtain particle information, there is important meaning to fields such as industrial production closely related therewith and scientific researches
Justice.
It is less than 1 μm of sub-micron and nano level particle for size, due to its skin effect and small-size effect, thus
The material that these particles are constituted has the general characteristic not having.For example, sub-micron and nano level iron particle sample,
Apparently higher than the iron powder that stock size is big on catalytic efficiency；Sub-micron and the optical characteristics of nano-scale particle material, which also exceed, seeks
Often, such as high novel solar battery of photoelectric transformation efficiency etc. can be prepared using nano semiconductor material.
It is existing due to measuring the limitation of magnitude typically in the measurement of sub-micron and the particle size of nanometer scale
The particle size detection means is mainly included：Particle size analyzer based on micrometering and the particle size analyzer based on dynamic light scattering method
Deng.Particle size analyzer based on micrometering uses electron microscope method and scanning probe microscopy, and it can intuitively measure Asia
The dimension information of micron and nano particle.
For particle suitable with optical wavelength in suspended particulate sample, due to Brownian movement so that the scattered light of the particle
There is Doppler frequency shift relative to incident light in frequency.So as to the scattered light signal of each particle scattered optical field coherent superposition
Optical signal show fluctuations with the time.Traditional particle size analyzer based on dynamic light scattering is based on above-mentioned principle, by visiting
The scattered light signal changed over time is surveyed, and scattered signal is characterized using time correlation function and is changed with time.According to this support
Gram this Einstein equation, the decorrelation rate of the time correlation function is relevant with the size and viscosity of particle, so that using should
Method can detect the size or viscosity information of particulate samples.This dynamic light scattering technique is otherwise known as photon correlation spectroscopy
(Photon Correlation Spectroscopy,PCS).However, above-mentioned PCS accurate measurement methods are just for scattering,single
Particulate samples, the suspension of such as low concentration.The statistics knot for the scattered signal that any Multiple Scattering composition is obtained for detection
Fruit can produce deviation.In order to which to contain in the high concentration scattering sample measurement of Multiple Scattering, PCS methods are occurred in that into photon intersects
Correlation spectrometry (Photon Cross Correlation Spectroscopy, PCCS).But in this method, in order to obtain
Correct time correlation function needs the sufficiently long time of integration.In addition, the measurement apparatus is complex, cost is high.
Utility model content
The purpose of this utility model is the deficiency for the existing particle size analyzer based on dynamic light scattering, it is proposed that a kind of
Grain device for fast detecting.
The purpose of this utility model is achieved through the following technical solutions：
The utility model includes being used for particulate samples dispersal device of the candidate particles sample dispersion into space and being used for
Build illumination optical and detection device that multiple sampling bodies collect Simulated dynamic scattering light signals parallel.
Described illumination optical is to use following one kind with detection device：
Including low-coherence light source, interferometer and detector；
Or including low-coherence light source, interferometer and spectrometer；
Or including frequency sweep broad spectrum light source, interferometer and detector.
Described illumination optical includes one or more of with detection device：
A kind of multiple beam illuminates the lighting device and multi-detector of the different horizontal space positions perpendicular to optical axis direction
Detection device, to build multiple sampling bodies in Spatial Dimension；
A kind of multiple beam illuminates same or different spatial lighting device and multi-detector with different incidence angles
Detection device, to build multiple sampling bodies in incidence angle dimension；
A kind of lighting device for the single beam being made up of multiple beamlets, beamlet has different optical path delay, and with not
Same or different spatial is illuminated with incident angle, to build multiple sampling bodies in incidence angle dimension, and light is utilized
Journey coded system realizes the parallel detecting of multiple sampling bodies；
A kind of to include the lighting device of multiple detection light beams containing different spectrum, different beam lightings are in the same space area
Domain or different spaces region, are specifically included and are illuminated using the light source of multiple different spectrum, or single broad spectrum light source is shone
Spectrum segmentation, or two ways combination are carried out after bright, to build multiple sampling bodies in spectral Dimensions.
It is 50 that the detection means, which specifically includes broadband low-coherence light source, optical circulator, splitting ratio,:50 fiber coupling
Device, the first Polarization Controller, the first optical fiber collimating device, condenser lens, plane high reflection mirror, the second Polarization Controller, second
Optical fiber collimating device, scanning galvanometer, object lens, sample dispersion unit, the 3rd optical fiber collimating device, grating, Fourier transform lens
With high speed linear array camera；The light that Low coherence wideband light source is sent, enters fiber coupler after optical circulator, from optical fiber coupling
The light of clutch outgoing is divided into two parts beamlet, wherein a beamlet is connected to ginseng by optical fiber by the first Polarization Controller
The first optical fiber collimating device in arm is examined, plane high reflection mirror is irradiated to after collimation and focusing；Another beamlet passes through light
Fibre is connected to the second optical fiber collimating device by the second Polarization Controller, and the emergent light of the second optical fiber collimating device is scanned to shake
On the sample that sample dispersion unit is incided after mirror, object lens；The emergent light of optical circulator is successively through the 3rd optical fiber collimator
High speed linear array camera is incided after part, grating and Fourier transform lens
Described broadband low-coherence light source uses superluminescent diode light source, and described object lens 39 are double glued using achromatism
Lens, described high speed linear array camera uses linear array scanning camera.
The utility model has the advantages that and advantage compared with prior art：
Compared to existing dynamic light scattering particle size instrument, it is only capable of the one-dimensional light intensity signal of acquisition and does temporal correlation point
Analysis.The utility model can be used for obtaining including depth direction, the horizontal space perpendicular to depth, spectrum in different time points detection
Dimension, the detection various dimensions such as angle of light dimension and optical polarization dimension space particle scattering data.
Compared to existing dynamic light scattering particle size instrument, it is calculated only for the scattered signal sample of One-dimension Time Series
Time autocorrelation function.Passage time sampling obtains independent sample during being somebody's turn to do.In order to ensure the reliability for measuring statistical result
And accuracy, the one-shot measurement needs considerably long overall measurement time (about several seconds), add time cost.The utility model energy
It is enough including deep space etc. various dimensions sampling parallel obtain enough scattering data in vivo, and the single measurement time can shorten
In to several milliseconds, repeatability is high, available for quick detection particle information.
Compared to existing dynamic light scattering particle size instrument, it only detects the light intensity signal of one-dimensional time change.
The utility model can parallel detecting two dimension or various dimensions space scattered light signal, can measurement space it is high-resolution scattering
Grain sample.
Brief description of the drawings
Fig. 1 is the schematic diagram of the utility model device；
Fig. 2 is the schematic diagram of the utility model embodiment.
Wherein：1- particles disperse；2- builds multiple sampling bodies and collects scattered signal parallel；3- scattered signal samples system
Comprehensive analysis；11- light sources；12- beam splitters；13- reference arm collimating mirrors；14- plane high reflection mirrors；15- sample arm collimating mirrors；16-
Scanning galvanometer；17- object lens；18- particle dispersal devices；19- interference signal detection devices；21- Polarization Controllers；31- Low coherences
Wideband light source；32- optical circulators；33- fiber couplers；The optical fiber collimating devices of 34- first；35- condenser lenses；36- planes are high
Speculum；The optical fiber collimating devices of 37- second；38- scanning galvanometers；39- object lens；40- sample dispersion units；The optical fiber of 41- the 3rd is accurate
Straight device；42- gratings；43- Fourier transform lenses；44- high speed linear array cameras；The Polarization Controllers of 46- first；47- second is inclined
Shake controller.
Embodiment
Embodiment of the present utility model is elaborated below in conjunction with accompanying drawing, accompanying drawing forms one of this paper
Point.It should be noted that what these explanations and example were merely exemplary, it is impossible to be considered as limiting model of the present utility model
Enclose, protection domain of the present utility model is limited by appended claims, it is any on the basis of the utility model claim
Change be all protection domain of the present utility model.
For the ease of understanding embodiment of the present utility model, each operation is described as multiple discrete operations, still, description
Order do not represent implement operation order.
Fig. 1 is illustrated that a kind of particle device for fast detecting schematic diagram of the present utility model.Using particle dispersal device 18
Particulate samples are sufficiently disperseed in certain space, including particle wet dispersion in the liquid phase and in the gas phase
Dry dispersion etc., thus provides the particle testing sample of the spatial dispersion for detection.For building multiple sampling bodies and simultaneously
Row collects the illumination optical and detection device of dynamic scattering signal, can be realized by the method for low coherence interference.The device
The agent structure of low coherence interferometry part is an interferometer, is constituted by 11~17,19 and 21, the light that wherein light source 11 is sent
Two parts light beam is divided into by beam splitter 12：Light beam therein enters the reference arm of interferometer, by reference to arm collimating mirror 13
It is irradiated on plane high reflection mirror 14；Another light beam enters sample arm, is focused on after collimation 15 and light path reflection to be measured
On sample.Wherein sample is carried out after disperseing using particle dispersal device 18, sample is placed in the focal plane of sample arm object lens 17
Place.The light that then reference arm and sample arm are each reflected back is received after interfering by interference signal detection device 19.For light
Fine type light path, the polarization state of light beam is adjusted using Polarization Controller 21, maximizes signal interference effect.
According to the different modes of low coherence interference detectable signal, a kind of particle device for fast detecting device tool shown in Fig. 1
Body includes：
1) time-domain measurement apparatus.Light source 11 uses broadband low-coherent light, and plane mirror 14 can be moved along optical axis direction,
Interference signal detection device 19 is a point probe.Reference arm light path, the interference of two-arm are changed by plane of motion speculum 14
Signal is detected by point probe 19, and the low coherence interference of the scattered signal in the z directions of a certain spatial depth is detected, so that
To the sampling body of deep space dimension.
2) spectral domain measurement apparatus.Light source 11 uses broadband low-coherent light, and plane mirror 14 is fixed, interference signal
Detection device 19 uses spectrometer.The line-scan digital camera that interference signal passes through in spectrometer records interference spectrum simultaneously.Using in Fu
Leaf analysis method analyzes interference spectrum signal, the parallel scattered information for obtaining depth z directions, so as to obtain depth dimension space
Sampling body.
3) sweep measurement device.Light source 11 uses swept light source, and plane mirror 14 is fixed, interference signal detection dress
Put 19 and use point probe.The low coherence interference spectrum of point probe time-sharing recording swept light source.Sampled Fourier analysis interference
Spectral signal, the parallel scattered information for obtaining depth z directions, so as to obtain the sampling body in depth dimension space.
Embodiment can obtain the sampling body of the particle of multiple dimensions using different detection modes, be implemented as follows：
A kind of multiple beam illuminates the lighting device and multi-detector of the different horizontal space positions perpendicular to optical axis direction
Detection device, build multiple sampling bodies in Spatial Dimension.Multiple devices as shown in Figure 1, each detection light can be used
Beam is irradiated to after sample arm object lens 17 perpendicular to the different horizontal space positions of optical axis direction, and each interfering beam is by each
From interference signal detection device 19 receive.
A kind of multiple beam illuminates same or different spatial lighting device and multi-detector with different incidence angles
Detection device, to build multiple sampling bodies in incidence angle dimension.Polarization Controller 21 Jing Guo sample arm can be come out
Single beam carries out one-to-many beam splitting, produces spatially separated light beam, enters at different angles after sample arm object lens 17
It is mapped to the surface of sample 18 and realizes that multi-angle is detected.
A kind of lighting device for the single beam being made up of multiple beamlets, beamlet has different optical path delay, and with not
Same or different spatial is illuminated with incident angle, to build multiple sampling bodies in incidence angle dimension, and light is utilized
Journey coded system realizes the parallel detecting of multiple sampling bodies.
A kind of to include the lighting device of multiple detection light beams containing different spectrum, different beam lightings are in the same space area
Domain or different spaces region, are specifically included and are illuminated using the light source of multiple different spectrum, or single broad spectrum light source is shone
Spectrum segmentation, or two ways combination are carried out after bright, to build multiple sampling bodies in spectral Dimensions.The light source that can be used
11 include multiple different light sources, and it has different spatial distributions, and the light sent incides beam splitter 12 after overcoupling
One end, into interference detection apparatus main body, detection light beam is irradiated to the same position of sample.Final receiving portion is by different
Interference signal detection device 19 receives the interference signal of the light of corresponding different spectrum.
Exemplary embodiment of the present utility model：
Fig. 2 is illustrated that a utilization disclosed herein exemplary embodiment of the present utility model.For detection particle
It is a kind of based on dynamic light scattering sample assemblage analyze detection means, including broadband low-coherence light source 31, optical circulator 32,
Splitting ratio is 50:It is 50 fiber coupler 33, the first Polarization Controller 46, the first optical fiber collimating device 34, condenser lens 35, flat
Face high reflection mirror 36, the second Polarization Controller 47, the second optical fiber collimating device 37, scanning galvanometer 38, object lens 39, sample dispersion dress
Put the 40, the 3rd optical fiber collimating device 41, grating 42, Fourier transform lens 43, high speed linear array camera 44.Its middle width strip Low coherence
Light source 31 uses centre wavelength for 1325nm, the superluminescent diode light source with a width of 100nm, object lens 39 use focal length for
30mm achromatic doublet, high speed linear array camera 44 is using the linear array scanning camera being made up of 2048 pixel cells.
The light that wherein the Low coherence wideband light source 31 as used in the utility model device is sent, after optical circulator 32
It is 50 to enter splitting ratio:50 fiber coupler 33, beamlet is divided into two parts from the light of the outgoing of fiber coupler 33：Its
Middle light beam is connected to the first optical fiber collimating device 34 in reference arm by optical fiber by the first Polarization Controller 46, by standard
Plane high reflection mirror 36 is irradiated to after straight and focusing；Another light beam is connected to sample by optical fiber by the second Polarization Controller 47
Second optical fiber collimating device 37 of arm section, is irradiated on sample by collimation, light path reflection and after focusing on.
Using sample dispersion unit 40 in the way of wet method by polystyrene microsphere particle it is fully dispersed arrive distilled water solution
In, obtain testing sample.Scanning galvanometer 38 in sample arm is fixed so that low coherence interferometer can parallel detecting obtain
Scattered signal of the sample space same position in depth direction not in the same time.The light path in sample arm passes through single-mode fiber simultaneously
Light beam is conducted, plays a part of space filtering to the back scattered light of testing sample, i.e., is effectively reduced multiple in scattered signal
Scatter composition.The light of sample backscattering is in light in the light and sample arm that are reflected by reference arm midplane high reflection mirror 36
Interfere at fine coupler 33, interference light is detected and is recorded by spectrometer (including device 41~44).
The utility model can obtain the sampling body of different spatial by detecting, and realize and the particle of spatial discrimination is transported
The imaging of dynamic feature (such as diffusion coefficient).When collecting scattered signal, detection light beam focuses on a certain spatial point of sample, with certain
Time interval collect include the plural scattered signals of all depth directions parallel.Meanwhile, visited using in the utility model device
The scanning galvanometer 38 of part is surveyed, changes the focal position of detection light beam, by the multiple positions of transverse shifting, is finally collected into difference
Scattered signal sampling body comprising all depth directions while horizontal space position.
Claims (4)
1. a kind of particle device for fast detecting, it is characterised in that including for the particle by candidate particles sample dispersion into space
Sample dispersion unit and the illumination optical and detection device for collecting Simulated dynamic scattering light signals parallel for building multiple sampling bodies；
Described illumination optical is to use following one kind with detection device：
Including low-coherence light source, interferometer and detector；
Or including low-coherence light source, interferometer and spectrometer；
Or including frequency sweep broad spectrum light source, interferometer and detector.
2. a kind of particle device for fast detecting according to claim 1, it is characterised in that：Described illumination optical and detection
Device includes one or more of：
A kind of multiple beam illuminates the spy of the lighting device and multi-detector of the different horizontal space positions perpendicular to optical axis direction
Survey device；
A kind of multiple beam illuminates the detection of same or different spatial lighting device and multi-detector with different incidence angles
Device；
A kind of lighting device for the single beam being made up of multiple beamlets, beamlet has different optical path delay, and is entered with difference
Penetrate that angle illumination is same or different spatial；
It is a kind of to include the lighting device of multiple detection light beams containing different spectrum, different beam lightings in the same space region or
Person's different spaces region.
3. a kind of particle device for fast detecting according to claim 1, it is characterised in that：The detection means is specifically included
Broadband low-coherence light source (31), optical circulator (32), splitting ratio are 50:50 fiber coupler (33), the first Polarization Controller
(46), the first optical fiber collimating device (34), condenser lens (35), plane high reflection mirror (36), the second Polarization Controller (47),
Two optical fiber collimating devices (37), scanning galvanometer (38), object lens (39), sample dispersion unit (40), the 3rd optical fiber collimating device
(41), grating (42), Fourier transform lens (43) and high speed linear array camera (44)；Low coherence wideband light source (31) is sent
Light, enters fiber coupler (33) after optical circulator (32), is divided into two from the light of fiber coupler (33) outgoing
Molecular beam, wherein the first optical fiber that a beamlet is connected to by optical fiber by the first Polarization Controller (46) in reference arm is accurate
Straight device (34), is irradiated to plane high reflection mirror (36) after collimation and focusing；Another beamlet passes through second by optical fiber
Polarization Controller (47) is connected to the second optical fiber collimating device (37), and the emergent light of the second optical fiber collimating device (37) is scanned to shake
On the sample that sample dispersion unit (40) are incided after mirror (38), object lens (39)；The emergent light of optical circulator (32) is successively
High speed linear array camera (44) is incided after the 3rd optical fiber collimating device (41), grating (42) and Fourier transform lens (43).
4. a kind of particle device for fast detecting according to claim 3, it is characterised in that：Described broadband low-coherence light source
(31) superluminescent diode light source is used, described object lens (39) use achromatic doublet, described high speed linear array phase
Machine (44) uses linear array scanning camera.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844870A (en) * | 2018-08-08 | 2018-11-20 | 重庆交通大学 | PM based on optical fiber structure10And PM2.5Detection instrument device and system |
| CN111239064A (en) * | 2020-02-25 | 2020-06-05 | 东莞理工学院 | Reflection and transmission combined optical measurement system for solution concentration measurement |
| CN111543971A (en) * | 2020-04-14 | 2020-08-18 | 浙江大学 | Blood flow quantification method and system for time-space self-adaptive sample ensemble decorrelation operation |
| CN111868503A (en) * | 2018-03-05 | 2020-10-30 | 马尔文帕纳科 | Particle size improvement by optical diffraction |
| CN112289171A (en) * | 2020-09-30 | 2021-01-29 | 北京德弦科技有限公司 | Data identification processing, reading and detecting method and device for transparent medium |
| CN115290511A (en) * | 2022-06-28 | 2022-11-04 | 佛山科学技术学院 | Device and method for three-dimensional imaging and detection of micro-plastic in water environment |
-
2017
- 2017-01-13 CN CN201720040259.8U patent/CN206618658U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111868503A (en) * | 2018-03-05 | 2020-10-30 | 马尔文帕纳科 | Particle size improvement by optical diffraction |
| CN108844870A (en) * | 2018-08-08 | 2018-11-20 | 重庆交通大学 | PM based on optical fiber structure10And PM2.5Detection instrument device and system |
| CN108844870B (en) * | 2018-08-08 | 2021-09-21 | 重庆交通大学 | PM based on optical fiber structure10And PM2.5Probe instrument apparatus and system |
| CN111239064A (en) * | 2020-02-25 | 2020-06-05 | 东莞理工学院 | Reflection and transmission combined optical measurement system for solution concentration measurement |
| CN111543971A (en) * | 2020-04-14 | 2020-08-18 | 浙江大学 | Blood flow quantification method and system for time-space self-adaptive sample ensemble decorrelation operation |
| CN111543971B (en) * | 2020-04-14 | 2021-08-06 | 浙江大学 | Blood flow quantification method and system for time-space self-adaptive sample ensemble decorrelation operation |
| CN112289171A (en) * | 2020-09-30 | 2021-01-29 | 北京德弦科技有限公司 | Data identification processing, reading and detecting method and device for transparent medium |
| CN112289171B (en) * | 2020-09-30 | 2022-09-27 | 北京德弦科技有限公司 | Data identification processing, reading and detecting method and device for transparent medium |
| CN115290511A (en) * | 2022-06-28 | 2022-11-04 | 佛山科学技术学院 | Device and method for three-dimensional imaging and detection of micro-plastic in water environment |
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