CN106595861A - Spatial resolution spectrum acquisition system - Google Patents
Spatial resolution spectrum acquisition system Download PDFInfo
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- CN106595861A CN106595861A CN201611130664.5A CN201611130664A CN106595861A CN 106595861 A CN106595861 A CN 106595861A CN 201611130664 A CN201611130664 A CN 201611130664A CN 106595861 A CN106595861 A CN 106595861A
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- optical fiber
- collection
- acquisition system
- fibre
- spatially resolved
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- 238000001228 spectrum Methods 0.000 title abstract description 4
- 239000000835 fiber Substances 0.000 claims abstract description 63
- 239000013307 optical fiber Substances 0.000 claims abstract description 52
- 230000003595 spectral effect Effects 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000004611 spectroscopical analysis Methods 0.000 claims description 29
- 230000003287 optical effect Effects 0.000 claims description 12
- 230000021615 conjugation Effects 0.000 claims description 11
- 238000005286 illumination Methods 0.000 claims 1
- 241000219739 Lens Species 0.000 description 7
- 210000000695 crystalline len Anatomy 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a spatial resolution spectrum acquisition system. Since an acquisition optical fiber is a single-core optical fiber, for an incident light field of any shape, an emergent light field is in total light intensity distribution in approximately circular symmetry, thus spectral signals exported to N spectrographs through beam splitting by optical fiber bundles are spectral signals in the same spatial position to be tested, the problem that measured spatial positions are inconsistent when N fiber optic spectrometers are used concurrently is solved, and high-reliability spatial resolution measurement is guaranteed to be realized when the N spectrometers are used to perform measurement concurrently.
Description
Technical field
The present invention relates to measurement of spatial resolution technical field, more particularly to a kind of spatially resolved spectroscopy acquisition system.
Background technology
Spectral signal is transferred to spectrogrph by fiber spectrometer by optical fiber, if its collecting fiber end face and space to be measured it
Between without other optics, then its collection is whole space to be measured spectrum.And be frequently necessary to only adopt in practical application
Collect the spectral signal in one spatial dimension of very little, i.e. measurement of spatial resolution in space to be measured.At this moment, need in space bit to be measured
The placement signal light collection light path and collecting fiber end face between is put, locus to be measured are imaged onto collecting fiber end face to realize
Measurement of spatial resolution.
In actual application, because the wavelength band of separate unit spectrogrph is limited, multiple stage spectrogrph is used sometimes common
Measurement；Realize that jointly the scheme of measurement is usually to use the fibre bundle more than a point to multiple stage spectrogrph in prior art, referring to Fig. 1,
The fibre bundle includes closing fine and point fibre；It is used for gathering flashlight initially with the fibre of the conjunction comprising several fibre cores (referring to Fig. 2), then
The flashlight is imported into respectively in different point fine (referring to Fig. 3) by every fibre core, and then is delivered separately to different spectrum
Instrument.
But, the program of the prior art, because the conjugate planes of each core end surface in conjunction fibre passes through signal light collection
Light path corresponds to respectively different locus to be measured, as shown in figure 4, surveying space bit when causing multiple stage spectrogrph to measure jointly
Put inconsistent, it is impossible to realize measurement of spatial resolution truly.
The content of the invention
The present invention provides a kind of spatially resolved spectroscopy acquisition system, to solve prior art in multiple stage spectrogrph measure jointly
When, survey the inconsistent problem in locus.
To realize the purpose, the technical scheme that the application is provided is as follows：
A kind of spatially resolved spectroscopy acquisition system, the measurement of spatial resolution being applied to when N platform spectrogrphs are used in conjunction with, N is
Positive integer more than 1；The spatially resolved spectroscopy acquisition system includes：
Signal light collection light path, for gathering the spectral signal at locus to be measured；
Collection optical fiber, for transmitting the spectral signal；The collection optical fiber is single-core fiber, for entering for arbitrary shape
Light field is penetrated, its outgoing light field is and is close to the symmetrical total light intensity distribution of circle；
Fibre bundle, for the spectral signal beam splitting of the collection fiber exit to be derived to N platform spectrogrphs；
Fibre-optical splice, for connecting the exit end of the collection optical fiber and the incidence end of the fibre bundle, makes the collection
The spectral signal of fiber exit is transferred in the fibre bundle.
Preferably, by the connection of the fibre-optical splice, exit end core end surface and the optical fiber of the collection optical fiber
The incidence end of beam each core end surface has overlap.
Preferably, by the connection of the fibre-optical splice, the exit end core end surface of the collection optical fiber is more than and can cover
Cover the incidence end of the fibre bundle each core end surface.
Preferably, the signal light collection light path is conjugation Optical devices, and the locus to be measured are used as the conjugation
The object plane of Optical devices, the collection optical fiber incidence end core end surface is the image planes of the conjugation Optical devices.
Preferably, the conjugation Optical devices are：Simple lens, lens group, certain surface type reflecting mirror or speculum group.
Preferably, the length of the collection optical fiber is more than preset length；The preset length be and it is described collection optical fiber
The corresponding length of core diameter, numerical aperture.
The spatially resolved spectroscopy acquisition system that the present invention is provided, is single-core fiber due to gathering optical fiber, and for any
The incident field of shape, its outgoing light field is and is close to the symmetrical total light intensity distribution of circle, therefore beam splitting is derived after fibre bundle
To the spectral signal of N platform spectrogrphs, the spectral signal being at same locus to be measured, N platform fiber spectrometers can be solved
The inconsistent problem in measured locus when being used in conjunction with, it is ensured that can realize that height can when measuring jointly using N platform spectrogrphs
By the measurement of spatial resolution of property.
Description of the drawings
For the technical scheme in being illustrated more clearly that the embodiment of the present invention or prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, below the accompanying drawing in description is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the beam splitter that prior art is provided；
Fig. 2 is the end view of the conjunction fibre that prior art is provided；
Fig. 3 is point fine end view that prior art is provided；
Fig. 4 is the structural representation of the spatially resolved spectroscopy acquisition system that prior art is provided；
Fig. 5 is the structural representation of spatially resolved spectroscopy acquisition system provided in an embodiment of the present invention；
Fig. 6 is another structural representation of the spatially resolved spectroscopy acquisition system that another embodiment of the present invention is provided.
Specific embodiment
It is understandable to enable the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
The present invention provides a kind of spatially resolved spectroscopy acquisition system, to solve prior art in multiple stage spectrogrph measure jointly
When, survey the inconsistent problem in locus.
Specifically, the spatially resolved spectroscopy acquisition system, is applied to spatial discrimination when N platform spectrogrphs are used in conjunction with and surveys
Amount, referring to Fig. 5, the spatially resolved spectroscopy acquisition system includes：Signal light collection light path 101, collection optical fiber 102, fibre bundle 103
And fibre-optical splice 104；N is the positive integer more than 1；Wherein：
Signal light collection light path 101 is used to gather the spectral signal at locus to be measured；
Collection optical fiber 102 is used for transmission spectrum signal；And it is single-core fiber to gather optical fiber 102, for entering for arbitrary shape
Light field is penetrated, its outgoing light field is and is close to the symmetrical total light intensity distribution of circle；
Fibre bundle 103 is used to the spectral signal beam splitting of collection fiber exit is derived to N platform spectrogrphs；
Fibre-optical splice 104 is used for the exit end of connection collection optical fiber 102 and the incidence end of fibre bundle 103, makes collection optical fiber
The spectral signal of 102 outgoing is transferred in fibre bundle 103.
Referring to Fig. 5, the spectral signal Jing signal light collections light path 101 at locus to be measured is transferred to the collection light of single
Fine 102, then acquired optical fiber 102 is transferred to beam splitting after the fibre bundle 103 more than a point and derives to multiple stage spectrogrph.
The spatially resolved spectroscopy acquisition system that the present embodiment is provided, is single-core fiber due to gathering optical fiber 102, and for
The incident field of arbitrary shape, its outgoing light field is and is close to the symmetrical total light intensity distribution of circle, therefore divides after fibre bundle 103
Beam is derived to the spectral signal of N platform spectrogrphs, the spectral signal being at same locus to be measured, can solve N platform optical fiber
The inconsistent problem in measured locus when spectrogrph is used in conjunction with, it is ensured that can be real when being measured jointly using N platform spectrogrphs
The measurement of spatial resolution of existing high reliability.
Another embodiment of the present invention provides a kind of specific spatially resolved spectroscopy acquisition system, in Fig. 5 and above-mentioned enforcement
On the basis of example：
Signal light collection light path 101 is the conjugation Optical devices of default focal length, and locus to be measured are used as conjugation optics dress
The object plane put, it is the image planes for being conjugated Optical devices to gather optical fiber incidence end core end surface.
Preferably, the conjugation Optical devices can be：Simple lens, lens group, certain surface type reflecting mirror or speculum group
Deng optics；Such as, referring to Fig. 6, the conjugation Optical devices are single convex lenss, and focal length is 30mm.
And, for the incident field of arbitrary shape, its outgoing light field is axisymmetric optical fiber eigen mode to collection optical fiber 102
Superposition so as to it is symmetrical that total light intensity distribution is close to circle；
In specific practical application, gathering the length of optical fiber 102 can be carried out according to the core diameter of its own and numerical aperture
Optimization, is the performance for ensureing its outgoing light field, and its length must not be less than a certain numerical value corresponding with optical fiber core diameter, numerical aperture.
Therefore, the length for gathering optical fiber 102 should be greater than preset length；The preset length be with collection optical fiber 102 core diameter,
The corresponding length of numerical aperture；Such as, the core diameter for gathering optical fiber 102 can be 600um, and the length for gathering optical fiber 102 can be with
For 0.5m.
Because the focal length of single convex lenss and the core diameter size of collection optical fiber 102 have together decided on the spatially resolved spectroscopy and have adopted
The size of the spatial resolution of collecting system, therefore, in specific practical application, can be according to its applied environment to single convex lens
The focal length of mirror, the core diameter of collection optical fiber 102 and length are preset, and herein only a kind of example, is not necessarily limited to this,
In the protection domain of the application.
Another embodiment of the present invention provides a kind of specific spatially resolved spectroscopy acquisition system, in Fig. 5 and above-mentioned enforcement
On the basis of example, referring to Fig. 6：
Fibre bundle 103 includes closing fine 301 and N roots point fine 302；N is the positive integer more than 1；
Closing fine 301 includes N root fibre cores；
Points fine 302 include a fibre core, the fibre core in N roots point fine 302 respectively with a pair of the N roots fibre core 1 closed in fine 301
Should communicate；
Specifically, by the connection of fibre-optical splice 104, the exit end core end surface and fibre bundle 103 of optical fiber 102 is gathered
Each core end surface of incidence end has overlap；It is more highly preferred to, the exit end core end surface for gathering optical fiber 102 is more than and can cover
Each core end surface of the incidence end of lid fibre bundle 103.
Preferably, the core diameter for closing the fibre core of the fibre core in fine 301 and point fibre 302 is 200um.
And, fibre-optical splice 104 can be the standard fiber bonders such as SMA905, FC or SC.
In specific practical application, fibre-optical splice 104 can be the fibre-optical splice of arbitrary standards, can realize gathering light
Connection between fine 102 and fibre bundle 103, is not specifically limited herein, can exist depending on its concrete application environment
In the protection domain of the application.
In addition, the core diameter of the fibre core of the fibre core and point fibre 302 in the core diameter of collection optical fiber 102, conjunction fine 301 can also separately be made
Select, as long as ensureing the exit end core end surface (gathering the end face of the core diameter of optical fiber 102) and fibre bundle of collection optical fiber 102
Each core end surface (namely total end face of the N root fibre cores in conjunction fine 301) of 103 incidence end has overlap, herein not
It is specifically limited, can be depending on its concrete application environment, in the protection domain of the application.
Fig. 6 is to be shown as a example by 3 by N, in specific practical application, can be with its actual application environment, and root
According to the actual quantity of spectrogrph, suitable fibre bundle 103 is chosen, the fibre bundle of a point three be not necessarily limited to shown in Fig. 6,
It is only herein a kind of example, the various schemes that can realize the common measurement of multiple stage spectrogrph are in the protection domain of the application.
Preferably, on the basis of Fig. 5, Fig. 6 and above-described embodiment, the spatially resolved spectroscopy acquisition system can also be wrapped
Include：The mechanical parts of fixed signal light collection light path 101 and the collection incidence end of optical fiber 102.
Preferably, the distance between the mechanical parts fixed signal light collection light path 101 and the collection incidence end end face of optical fiber 102
For 35mm.
The installation process of the spatially resolved spectroscopy acquisition system is：
First, by the SMA905 of conjunction fine 301 of the thicker single collection optical fiber 102 of core diameter and the fibre bundle 103 more than a point,
The standard fiber bonder such as FC or SC is connected, and constitutes the light path of fiber section.
Then the mechanical parts are adjusted with the incidence end end face of collection optical fiber 102 and the fixed pass of signal light collection light path 101
System, makes a default locus to be measured be imaged onto on the incident end face of collection optical fiber 102.
Finally, the N roots of fibre bundle 103 point fine 302 are connected into respectively N platform spectrogrphs；Illustrate so that N is for 3 as an example, by light
3 pieces points of fine beam 103 fine 302 connect respectively 3 spectrogrphs, that is, carry out the measurement of spatial resolution of high reliability, do not do herein and have
Body is limited, in the protection domain of the application.
What deserves to be explained is, in prior art, because fibre bundle and the connection of signal light collection light path cannot be fixed all the time, because
This, the repeatability of spectrometer detection signal can be made after plug cannot be ensured.
And the spatially resolved spectroscopy acquisition system that the present embodiment is provided, by above-mentioned installation process, you can by the space
The input application of resolved spectroscopy acquisition system；When the spatially resolved spectroscopy acquisition system is applied to N platform spectrogrphs and measures jointly, can be with
Real measurement of spatial resolution is realized, and the repeatability of spectrometer detection signal is can also ensure that after plug；This need into
The spectroscopy applications occasion of row measurement of spatial resolution is necessary.
Specific operation principle is same as the previously described embodiments, no longer repeats one by one herein.
Each embodiment is described by the way of progressive in the present invention, and what each embodiment was stressed is and other realities
Apply the difference of example, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
Speech, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method part illustration
.
The above, is only presently preferred embodiments of the present invention, and any pro forma restriction is not made to the present invention.Though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, under without departing from technical solution of the present invention ambit, all using the methods and techniques content of the disclosure above to the present invention
Technical scheme makes many possible variations and modification, or the Equivalent embodiments for being revised as equivalent variations.Therefore, it is every without departing from
The content of technical solution of the present invention, according to the technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent
Change and modification, still fall within the range of technical solution of the present invention protection.
Claims (6)
1. a kind of spatially resolved spectroscopy acquisition system, it is characterised in that the spatial discrimination being applied to when N platform spectrogrphs are used in conjunction with
Measurement, N is the positive integer more than 1；The spatially resolved spectroscopy acquisition system includes：
Signal light collection light path, for gathering the spectral signal at locus to be measured；
Collection optical fiber, for transmitting the spectral signal；The collection optical fiber is single-core fiber, for the incident illumination of arbitrary shape
, its outgoing light field is and is close to the symmetrical total light intensity distribution of circle；
Fibre bundle, for the spectral signal beam splitting of the collection fiber exit to be derived to N platform spectrogrphs；
Fibre-optical splice, for connecting the exit end of the collection optical fiber and the incidence end of the fibre bundle, makes the collection optical fiber
The spectral signal of outgoing is transferred in the fibre bundle.
2. spatially resolved spectroscopy acquisition system according to claim 1, it is characterised in that by the company of the fibre-optical splice
Connect, each core end surface has overlap to the exit end core end surface of the collection optical fiber with the incidence end of the fibre bundle.
3. spatially resolved spectroscopy acquisition system according to claim 2, it is characterised in that by the company of the fibre-optical splice
Connect, the exit end core end surface of the collection optical fiber more than and can cover the incidence end of the fibre bundle each core end surface.
4. spatially resolved spectroscopy acquisition system according to claim 1, it is characterised in that the signal light collection light path is
Conjugation Optical devices, the locus to be measured are used as the object plane for being conjugated Optical devices, and the collection optical fiber incidence end is fine
Core end face is the image planes of the conjugation Optical devices.
5. spatially resolved spectroscopy acquisition system according to claim 4, it is characterised in that the conjugation Optical devices are：
Simple lens, lens group, certain surface type reflecting mirror or speculum group.
6. spatially resolved spectroscopy acquisition system according to claim 1, it is characterised in that the length of the collection optical fiber is big
In preset length；The preset length is length corresponding with the collection core diameter of optical fiber, numerical aperture.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611130664.5A CN106595861A (en) | 2016-12-09 | 2016-12-09 | Spatial resolution spectrum acquisition system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611130664.5A CN106595861A (en) | 2016-12-09 | 2016-12-09 | Spatial resolution spectrum acquisition system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976254A (en) * | 2017-11-15 | 2018-05-01 | 中国科学院长春光学精密机械与物理研究所 | A kind of fiber spectrometer and multichannel optical fiber spectrometer device |
| CN111366533A (en) * | 2020-05-11 | 2020-07-03 | 上海仪电物理光学仪器有限公司 | Full-spectrum miniature optical fiber spectrometer |
| CN111992854A (en) * | 2020-08-28 | 2020-11-27 | 哈尔滨工业大学（威海） | Method and device for collecting plasma spectrum spatial domain information |
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| CN203732444U (en) * | 2013-11-26 | 2014-07-23 | 中国科学院广州地球化学研究所 | Laser-induced breakdown spectroscopy analyzer |
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| JP2007279194A (en) * | 2006-04-04 | 2007-10-25 | Wired Japan:Kk | Fiber optic cable, optical transmission method, and spectroanalysis system |
| CN102435311A (en) * | 2011-09-07 | 2012-05-02 | 杭州远方光电信息股份有限公司 | Optical fiber bundle spectrometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107976254A (en) * | 2017-11-15 | 2018-05-01 | 中国科学院长春光学精密机械与物理研究所 | A kind of fiber spectrometer and multichannel optical fiber spectrometer device |
| CN111366533A (en) * | 2020-05-11 | 2020-07-03 | 上海仪电物理光学仪器有限公司 | Full-spectrum miniature optical fiber spectrometer |
| CN111992854A (en) * | 2020-08-28 | 2020-11-27 | 哈尔滨工业大学（威海） | Method and device for collecting plasma spectrum spatial domain information |
| CN111992854B (en) * | 2020-08-28 | 2021-12-28 | 哈尔滨工业大学（威海） | Method and device for collecting plasma spectrum spatial domain information |
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