CN206057637U - A kind of twin-core fiber collimator tested the speed for laser interference - Google Patents
A kind of twin-core fiber collimator tested the speed for laser interference Download PDFInfo
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- CN206057637U CN206057637U CN201621069597.6U CN201621069597U CN206057637U CN 206057637 U CN206057637 U CN 206057637U CN 201621069597 U CN201621069597 U CN 201621069597U CN 206057637 U CN206057637 U CN 206057637U
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- collimator
- reflecting surface
- lens
- fiber
- twin
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Abstract
This utility model is related to laser interference studying technological domain, for the problem that actual signal is flooded by fundamental frequency signal, there is provided a kind of twin-core fiber collimator tested the speed for laser interference.Can not only solve the problems, such as that signal interference can also realize the test occasion of different operating distance.The overall structure figure of this utility model twin-core fiber collimator, the system include transmitting probe, receive probe and Global Macros set.Structure of the twin-core probe using one one receipts, i.e., one optical fiber are used for the transmitting of laser, and another optical fiber is used for the reception of laser return light.This addresses the problem the big problem of return loss.This utility model includes launching fiber, transmitting probe, receiving transducer, reception optical fiber and collimator package cover；Receiving transducer receives the signal of reflective surface, and the signal is passed to laser interference instrument by reception optical fiber；Transmitting probe central axis and collimator package cover axis angle θ；Receiving transducer is receiving lens.
Description
Technical field
This utility model is related to laser interference studying technological domain, particularly a kind of twin-core light tested the speed for laser interference
Fine collimator.
Background technology
All-fiber-optic displacement interferes the laser interference velocity measuring technique as latest generation to have non-cpntact measurement, temporal resolution
It is high, the advantages of the accuracy that tests the speed is high.It is used widely in detonation physics, it has also become the main means that test the speed.With should
With deepening continuously and extension for field, propose more in terms of the fineness for carrying out tachometric survey and correlation analysiss to object to be measured
High requirement.On this basis, we have proposed using double light source photon Doppler anemometers.Double light source photon Doppler survey
Fast instrument is extended on the basis of original all-fiber displacement interference instrument by the function of realizing upper and lower shift frequency and tests the speed scope and test the speed
Resolution and single channel signal carry out the differentiation of the direction of motion.The optical fiber collimator of traditional all-fiber displacement interference instrument is same
Source type, that is, launch and be received as same lens.As fiber end face return loss can not be completely eliminated, so the signal of test can be all the time
There is straight line signal band（Fundamental frequency）, so for some low speed signals or the survey using time-division WDM device
The situation that examination hall actual signal occurred is flooded by baseline.In order to solve this problem, herein in double light source photon Doppler
On the basis of tachymeter, we devise supporting twin-core probe.
Utility model content
Goal of the invention of the present utility model is：For the problem that actual signal is flooded by fundamental frequency signal, there is provided Yi Zhongyong
In the twin-core fiber collimator that laser interference tests the speed.Can not only solve the problems, such as signal interference can also realize different operating away from
From test occasion.The overall structure figure of twin-core fiber collimator of the present invention, the system include transmitting probe, receive probe and whole
Body protective case.Structure of the twin-core probe using one one receipts, i.e., one optical fiber are used for the transmitting of laser, and another optical fiber is used to swash
The reception of light return light.This addresses the problem the big problem of return loss.
The technical solution adopted in the utility model is such：
It is a kind of to include launching fiber, transmitting probe, receiving transducer, connect for the twin-core fiber collimator that laser interference tests the speed
Receive optical fiber and collimator package cover；
Laser signal is passed to laser emission probe by launching fiber；
Transmitting probe, for by laser signal is converged to reflecting surface；Transmitting probe central axis is sealed with collimator
Encapsulation axis angle θ；Transmitting probe is diversing lens；
The signal for receiving the signal of reflective surface, and is passed to laser by reception optical fiber and is done by receiving transducer
Interferometer device；Transmitting probe central axis and collimator package cover axis angle θ；Receiving transducer is receiving lens；
Collimator package cover, for part diversing lens and part receiving lens are encapsulated in collimation by fiber matrix agent
In device package cover, collimator package cover both ends of the surface are all open structures, by fiber matrix oxidant layer, away from the transmitting of reflecting surface
Lensed endface and the receiving lens end face away from reflecting surface cause to form closing away from the collimator package cover end face of reflecting surface
End face；Diversing lens end face away from reflecting surface and the receiving lens end face away from reflecting surface are with fiber matrix oxidant layer same
In plane；Diversing lens end face near reflecting surface is with the receiving lens end face near reflecting surface beyond the collimation near reflecting surface
Device package cover end face；Collimator package cover end face remainder near reflecting surface forms blind end by fiber matrix oxidant layer
Face；Diversing lens and, the diversing lens of close reflecting surface in larger distance away from the receiving lens of reflecting surface away from reflecting surface
It is in small distance with the receiving lens near reflecting surface；Collimator package cover internal voids are partially filled with fiber matrix agent；Optical fiber glues
Knot oxidant layer be by fiber matrix dosage form into；It is d that reflecting surface is referred to apart from twin-core fiber collimator central point vertical dimension
Plane, can by laser signal reflect plane.
Further, meet, wherein D is mirror lens diameter；Diversing lens central point
Distance is x away from the collimator package cover end face distance of reflecting surface；Collimator of the mirror lens central point distance away from reflecting surface
Package cover end face distance is x；Diversing lens central point, receiving lens central point and twin-core fiber collimator central point are located at same
Plane.
Further, collimator height H>2d*tanθ.
Further, the collimator package cover is lucite, copper pipe or earthenware.
Further, launching fiber is attached with diversing lens in fixed position point dispensing by fiber matrix agent；
Receiving lens are attached with reception optical fiber in fixed position point dispensing by fiber matrix agent.
In sum, as a result of above-mentioned technical proposal, the beneficial effects of the utility model are：
1st, Fig. 1 is the overall structure figure of twin-core fiber collimator of the present invention, the system includes transmitting probe, receive probe and
Global Macros set.Structure of the twin-core probe using one one receipts, i.e., one optical fiber are used for the transmitting of laser, and another optical fiber is used for
The reception of laser return light.This addresses the problem the big problem of return loss.
2nd, in order to be applied to different operating distances, the twin-core probe of this paper adopts twin-lens structure, launching fiber
Laser is converged on the reflecting surface of certain operating distance after diversing lens 1, and the laser of reflective surface is entered and receives saturating
Mirror is finally received by laser interferometer.
Wherein the size for being smaller in size than receiving lens of diversing lens, so can reduce optical fiber collimator as far as possible
Overall dimensions, so as to be applied to different occasions, receiving lens as far as possible can receive the Signal-to-Noise that return light makes more
Improve.Shape 2 θ at a certain angle between diversing lens and receiving lens, so by adjust diversing lens and receiving lens it
Between angle can just realize the test request of different operating distance.
Description of the drawings
Fig. 1 is this utility model structure.
It is utility model works principle in Fig. 2.
Labelling in figure：
4. reception optical fiber of 1- launching fiber 2- diversing lens 3- receiving lens
5- collimator package covers 6- reflecting surface 17,2 8- reflectings surface 3 of reflecting surface
1 10- reflection lights of 9- reflection lights, 2 11- reflection lights 3.
Specific embodiment
Below in conjunction with the accompanying drawings, this utility model is described in detail.
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only to explain
This utility model, is not used to limit this utility model.
This utility model related description：
1st, as shown in figure 1, mirror lens and receiving lens are all lens.
2nd, the fixed position point determination process of diversing lens and launching fiber connection is：Plane mirror is placed on into receiving lens work
Make at the distalmost end and most proximal end of distance, laser instrument sends laser and double light cores are entered after three port circulators, launching fiber
After optical fiber collimator, then after the plane mirror by receiving lens and after receiving optical fiber Jing overpower meters, when launching fiber and send out
Penetrate lens to bond in certain fixed position point A by fiber matrix agent, receive optical fiber and receive lens to exist by fiber matrix agent
When certain fixed position point B bonds, laser when 2 points of magnitude of powers of the distalmost end and most proximal end are minimum, then fixed position
Point A is the location point of diversing lens and the fiber matrix agent point gemel connection of transmitting light.Fixed position point B is to receive lens and connect
Receive the location point of the fiber matrix agent point gemel connection of optical fiber connection.
Operation principle is as shown in Figure 2：
Laser instrument converges to reflecting surface 1 after transmitting probe, through 1 back reflection of reflecting surface laser through reflection light
1 is received by receiving transducer.Finally enter laser interference instrument.In the same manner, laser instrument is not entering in the same time respectively through transmitting probe
Be mapped to the surface of emission 2, after reflecting surface 3, respectively through reflection light 2, reflection light 3, after received by receiving transducer, finally enter dry
Interferometer device.
Laser signal after optical fiber collimator process passes to laser interference instrument, is further processed.
Preferred embodiment of the present utility model is the foregoing is only, it is not to limit this utility model, all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in this utility model
Protection domain within.
Claims (5)
1. a kind of twin-core fiber collimator tested the speed for laser interference, it is characterised in that including launching fiber, transmitting probe, connect
Receive probe, reception optical fiber and collimator package cover；
Laser signal is passed to laser emission probe by launching fiber；
Transmitting probe, for by laser signal is converged to reflecting surface；Transmitting probe central axis and collimator package cover
Axis angle θ；Transmitting probe is diversing lens；
The signal for receiving the signal of reflective surface, and is passed to laser interferometer by reception optical fiber by receiving transducer
Device；Transmitting probe central axis and collimator package cover axis angle θ；Receiving transducer is receiving lens；
Collimator package cover, for part diversing lens and part receiving lens are encapsulated in collimator envelope by fiber matrix agent
In encapsulation, collimator package cover both ends of the surface are all open structures, by fiber matrix oxidant layer, away from the diversing lens of reflecting surface
End face and the receiving lens end face away from reflecting surface cause to form Closed End away from the collimator package cover end face of reflecting surface；
Diversing lens end face away from reflecting surface and the receiving lens end face away from reflecting surface are with fiber matrix oxidant layer in same plane
It is interior；Diversing lens end face near reflecting surface is sealed beyond the collimator near reflecting surface with the receiving lens end face near reflecting surface
Encapsulation end face；Collimator package cover end face remainder near reflecting surface forms Closed End by fiber matrix oxidant layer；Far
Diversing lens from reflecting surface and the receiving lens away from reflecting surface are in larger distance, near reflecting surface diversing lens with it is close
The receiving lens of reflecting surface are in small distance；Collimator package cover internal voids are partially filled with fiber matrix agent；Fiber matrix oxidant layer
Be by fiber matrix dosage form into；Reflecting surface refers to the plane apart from twin-core fiber collimator central point vertical dimension for d,
The plane that laser signal can be reflected.
2. a kind of twin-core fiber collimator tested the speed for laser interference according to claim 1, it is characterised in that meet, wherein D is mirror lens diameter；Collimator of the diversing lens central point distance away from reflecting surface
Package cover end face distance is x；Mirror lens central point distance is x away from the collimator package cover end face distance of reflecting surface；Transmitting
Lens centre point, receiving lens central point and twin-core fiber collimator central point are generally aligned in the same plane.
3. according to a kind of twin-core fiber collimator tested the speed for laser interference described in claim 1, it is characterised in that the standard
Straight device height H>2d*tanθ.
4. according to a kind of twin-core fiber collimator tested the speed for laser interference described in claim 1, it is characterised in that the standard
Straight device package cover is lucite, copper pipe or earthenware.
5. according to a kind of twin-core fiber collimator tested the speed for laser interference described in claim 1, it is characterised in that by light
Launching fiber is attached with diversing lens by fine binding agent in fixed position point dispensing；By fiber matrix agent in fixed position
Receiving lens are attached by point dispensing with reception optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621069597.6U CN206057637U (en) | 2016-09-22 | 2016-09-22 | A kind of twin-core fiber collimator tested the speed for laser interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621069597.6U CN206057637U (en) | 2016-09-22 | 2016-09-22 | A kind of twin-core fiber collimator tested the speed for laser interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206057637U true CN206057637U (en) | 2017-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621069597.6U Expired - Fee Related CN206057637U (en) | 2016-09-22 | 2016-09-22 | A kind of twin-core fiber collimator tested the speed for laser interference |
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| Country | Link |
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| CN (1) | CN206057637U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110764248A (en) * | 2019-09-26 | 2020-02-07 | 浙江大学 | Probe with optimized focal depth, working distance and axial light intensity uniformity |
-
2016
- 2016-09-22 CN CN201621069597.6U patent/CN206057637U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110764248A (en) * | 2019-09-26 | 2020-02-07 | 浙江大学 | Probe with optimized focal depth, working distance and axial light intensity uniformity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170329 Termination date: 20200922 |