CN205193355U - Novel michelson interferometer - Google Patents
Novel michelson interferometer Download PDFInfo
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- CN205193355U CN205193355U CN201520955497.2U CN201520955497U CN205193355U CN 205193355 U CN205193355 U CN 205193355U CN 201520955497 U CN201520955497 U CN 201520955497U CN 205193355 U CN205193355 U CN 205193355U
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- splitter
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Abstract
The utility model provides a michelson interferometer, includes: the light source, first barn door and second barn door, a pedestal, the beam -splitter, the compensating plate, first speculum and the second mirror, wherein the beam -splitter is sheet glass, two of this sheet glass side nonparallels and have and be less than 0.1 degree contained angle, and have the base between light source 1 and beam -splitter, this base is provided with two high first barn door and second barn doors such as be parallel to each other, wherein the base is located the plane parallel with the second mirror, the light source emit light bundle that highly just in time makes of first and second barn doors sweeps from the top edge of first barn door and second barn door.
Description
Technical field
The utility model relates to Michelson interferometer, belongs to optical technical field.
Background technology
Michelson interferometer is modal one in optical interdferometer.The principle of Michelson interferometer is that a branch of incident light is divided into two bundles to be returned by the flat mirror reflects of correspondence separately afterwards, this two-beam thus can interfere.In interference, the different light paths of two-beam can realize by regulating the refractive index of interfering arm lengths and changing medium, thus can form different interference patterns.Interference fringe is the not good enough track of aplanatism, therefore, analyze certain and interfere the pattern produced, must obtain the function of the optical path difference position distribution of coherent light.
If interference fringe is moved, must be that the optical path difference that field point is corresponding there occurs change, cause the reason that optical path difference changes, may be that fiber lengths L changes, or the refractive index n of certain section of medium there occurs change in light path, or the thickness e of film there occurs change.
As shown in Figure 1, A is that one side plates semi-transparent semi-reflecting film, and B is compensating plate, and M1, M2 are plane mirror, M1 is fixing, and M2 is connected with precision screw, makes it move forwards, backwards, least count is 10-4mm, can estimate 10-5mm, respectively has several primary screw its orientation adjustable after M1 and M2.When M1 and M2 ' perfect parallelism, M2 can move, and the annular striped showing as equal inclination interference constantly " spues " from center or to center " gulp down into ".When " clearance " distance between two level crossings increases, center will " spue " striped one by one; Otherwise then " gulp down into ".M1 and M2 ' not perfect parallelism time, then show as equal thick interference fringe, when M2 moves, striped constantly moves past a certain mark position in visual field, and the relation of M2 translation distance d and move of stripe number N meets: d=N λ/2, λ is lambda1-wavelength.
Light through M2 reflection passes beam-splitter three times, and passes through beam-splitter only once through the light of M1 reflection.The setting of compensating plate is this asymmetric in order to eliminate.When using monochromatic source, air light path can be utilized compensate, not necessarily wanting compensating plate; But when secondary color light source, because glass is different with the dispersion of air, compensating plate is then indispensable.
If observe the interference fringe of white light, arm is full symmetric substantially, and namely the optical path difference of two coherent lights is very little, at this time can see color fringe; If M1 or M2 has inclination slightly, colored vertical bar line symmetrical centered by the interference fringe that just can obtain the intersection place (d=0) of uniform thickness, central fringe due to half-wave loss be dark fringe.
The above is about Michelson interferometer in prior art, this device also exists two large defects, a kind of defect be beam-splitter adopt be all sheet glass, also be the glass plate that two surfaces are parallel to each other, the parallel glass plate in this two surfaces is adopted to there will be the interference fringe of the roundtrip light between the parallel surface of glass plate two, this interference fringe also can be detected device and received, thus the interpretation of real interference fringe is had an impact, the incident light of second defect Michelson interferometer needs strict becoming miter angle with beam-splitter and impinge perpendicularly on M2 and M1, even beam-splitter, M1, when M2 strictly sets, all need the definitely accurate of incident light, but ensure the severe steps definitely precisely often needing to aim in incident light direction, process is complicated, expend time in length, the utility model puts forward for above-mentioned two defects just.
Utility model content
The utility model provides a kind of novel Michelson interferometer, this Michelson interferometer, by using the sheet glass with very low-angle angle as beam-splitter and use two parallel contour light barriers, well solves two large defects existing in prior art.
According to an embodiment of the present utility model, provide a kind of Michelson interferometer, comprise: light source, first gear tabula rasa and second gear tabula rasa, base, beam-splitter, compensating plate, first catoptron and the second catoptron, wherein beam-splitter is sheet glass, two sides of this sheet glass are not parallel and have the angle being less than 0.1 degree, and between light source 1 and beam-splitter, there is base, this base is provided with two the first gear tabula rasas and second gear tabula rasa that are parallel to each other contour, wherein base is positioned at in the plane of the second mirror parallel, the height of the first and second light barriers just in time makes light source send light beam to skim over from the coboundary of first gear tabula rasa and second gear tabula rasa.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic diagram of Michelson interferometer of the prior art;
Accompanying drawing 2 is the schematic diagram of the beam-splitter that the utility model adopts;
Accompanying drawing 3 is schematic diagram of Michelson interferometer of the present utility model;
In above-mentioned accompanying drawing, 1 represents light source, and 2 and 3 represent light barrier, and 4 represent base, and A represents beam-splitter, and B represents compensating plate, and M1, M2 represent catoptron.
Embodiment
Below by by reference to the accompanying drawings 2 and accompanying drawing 3 basis on describe embodiment of the present utility model in detail, first the beam-splitter adopted in the utility model is described, this beam-splitter is also a glass plate, but two of sheet glass sides are also not parallel, have a very little angle between two sides, this angle is less than 0.1 degree, goes out as shown in Figure 2, after using such beam-splitter, just can eliminate the interference that the roundtrip light between two parallel reflectings surface is formed.Simultaneously, between the light source l and beam-splitter A of Michelson interferometer of the present utility model, there is a base, this base is provided with two contour light barriers that are parallel to each other, wherein base is positioned in the plane parallel with mirror M 1, the height of light barrier just in time makes light source 1 send light beam to pass through from the coboundary of light barrier, as long as ensure that the light beam that light source 1 sends is all skim over from the coboundary of two light barriers the strict demarcation namely achieving optical path direction.
In general, Michelson interferometer of the present utility model comprises: light source 1, first gear tabula rasa and second gear tabula rasa, base 4, beam-splitter, compensating plate, first catoptron and the second catoptron, wherein beam-splitter is sheet glass, two sides of this sheet glass are not parallel and have the angle being less than 0.1 degree, and there is base 4 between light source 1 and beam-splitter, this base 4 is provided with two contour light barriers that are parallel to each other, wherein base is positioned at in the plane of the second mirror parallel, the height of light barrier just in time makes light source 1 send light beam to skim over from the coboundary of light barrier.
Use Michelson interferometer of the present utility model can solve of the prior art two large defects.
Claims (1)
1. a Michelson interferometer, comprise: light source, first gear tabula rasa and second gear tabula rasa, base, beam-splitter, compensating plate, first catoptron and the second catoptron, wherein beam-splitter is sheet glass, two sides of this sheet glass are not parallel and have the angle being less than 0.1 degree, and between light source 1 and beam-splitter, there is base, this base is provided with two the first gear tabula rasas and second gear tabula rasa that are parallel to each other contour, wherein base is positioned at in the plane of the second mirror parallel, the height of the first and second light barriers just in time makes light source send light beam to skim over from the coboundary of first gear tabula rasa and second gear tabula rasa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520955497.2U CN205193355U (en) | 2015-11-24 | 2015-11-24 | Novel michelson interferometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520955497.2U CN205193355U (en) | 2015-11-24 | 2015-11-24 | Novel michelson interferometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205193355U true CN205193355U (en) | 2016-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520955497.2U Expired - Fee Related CN205193355U (en) | 2015-11-24 | 2015-11-24 | Novel michelson interferometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205193355U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132102A (en) * | 2018-02-09 | 2018-06-08 | 广东海洋大学 | A kind of optical-fiber intelligent Michelson's interferometer device and its application method |
-
2015
- 2015-11-24 CN CN201520955497.2U patent/CN205193355U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132102A (en) * | 2018-02-09 | 2018-06-08 | 广东海洋大学 | A kind of optical-fiber intelligent Michelson's interferometer device and its application method |
| CN108132102B (en) * | 2018-02-09 | 2024-01-30 | 广东海洋大学 | Optical fiber intelligent Michelson interferometer device and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20160427 Termination date: 20161124 |