CN112162378A - Interferometer - Google Patents
Interferometer Download PDFInfo
- Publication number
- CN112162378A CN112162378A CN202011017947.5A CN202011017947A CN112162378A CN 112162378 A CN112162378 A CN 112162378A CN 202011017947 A CN202011017947 A CN 202011017947A CN 112162378 A CN112162378 A CN 112162378A
- Authority
- CN
- China
- Prior art keywords
- light
- beam splitter
- reflector
- reflected
- reflecting mirror
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/1821—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors for rotating or oscillating mirrors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
- G01B9/02049—Interferometers characterised by particular mechanical design details
Abstract
The invention discloses an interferometer, which comprises a base, wherein a light source, a beam splitter, a first reflector, a second reflector and a swinging piece are arranged on the base; the beam splitter splits incident light generated by the light source into a transmitted first light beam and a reflected second light beam; the first light beam is reflected by the first reflector and then is divided into first reflected light and first transmitted light by the beam splitter; the second light beam is reflected by the second reflecting mirror and then is divided into second reflected light and second transmitted light by the beam splitter; the first reflecting mirror and the second reflecting mirror are arranged on the swinging piece through the fixing frame, when the swinging piece is at the initial position, the optical paths of the first transmission light and the second reflection light are equal, and when the swinging piece drives the first reflecting mirror and the second reflecting mirror to swing back and forth, the optical path difference is generated between the first transmission light and the second reflection light. The invention has the advantages of high interference precision and convenient use.
Description
Technical Field
The invention relates to the field of optics, in particular to an interferometer.
Background
An interferometer is an instrument made based on the phenomenon of light interference. A light beam emitted by a light source is divided into two (or more) beams, and the two (or more) beams are converged into a light beam after passing through different paths, so that an interference pattern is generated in an interference pattern detector, and if the time difference of the light beam reaching the detector through different paths is changed, the interference pattern is changed. The speed of light is composed of the speed and direction of light, and the current interferometers generally change the relative speed and optical path of light to realize the change of an interference pattern, for example, flowing water enables light in water to reach a detector more quickly; moving the mirror shortens the optical path, etc. These interferometers are not sensitive to small changes in the direction of the beam and thus do not satisfy the need for measurement of small angular changes in the beam.
Disclosure of Invention
The invention aims to provide an interferometer which is high in interference precision and convenient to use.
In order to solve the technical problems, the invention adopts the following technical scheme:
an interferometer comprises a base, wherein a light source, a beam splitter, a first reflector, a second reflector and a swinging piece are arranged on the base;
the beam splitter splits incident light generated by the light source into a transmitted first light beam and a reflected second light beam;
the first light beam is reflected by the first reflector and then is divided into first reflected light and first transmitted light by the beam splitter;
the second light beam is reflected by the second reflecting mirror and then is divided into second reflected light and second transmitted light by the beam splitter;
the first reflecting mirror and the second reflecting mirror are arranged on the swinging piece through the fixing frame, when the swinging piece is at the initial position, the optical paths of the first transmission light and the second reflection light are equal, and when the swinging piece drives the first reflecting mirror and the second reflecting mirror to swing back and forth, the optical path difference is generated between the first transmission light and the second reflection light.
Preferably, a fixed seat is arranged on the base, and the light source, the beam splitter, the first reflector, the second reflector and the swinging piece are all fixedly arranged on the fixed seat.
Preferably, the swinging member comprises a first swinging arm, a second swinging arm and a driving shaft, the first reflector is arranged on the first swinging arm, the second reflector is arranged on the second swinging arm, and the driving shaft is arranged at the joint of the first swinging arm and the second swinging arm.
Preferably, the driving shaft includes a rotating shaft, a driving coil and a driving magnet, the first swing arm and the second swing arm are disposed on the base through the rotating shaft, the driving magnet is disposed at a joint of the first swing arm and the second swing arm, and the driving coil is disposed on the fixing seat.
Preferably, a spring bearing is arranged on the rotating shaft.
Preferably, the first swing arm and the second swing arm are convexly provided with fixing parts, and the fixing parts are provided with U-shaped fixing frames for fixing the driving magnets. The drive magnets are provided with a plurality of blocks and are divided into two groups, two groups of drive magnets are respectively arranged on the inner side wall of the U-shaped fixing frame, and the drive coil is arranged between the two groups of drive magnets in a suspension mode.
Preferably, the first mirror and the second mirror are both corner mirrors.
Preferably, the fixing seat is provided with two mounting seats, the two mounting seats are respectively arranged on two sides of the fixing seat, and the two mounting seats are respectively provided with a reflector.
Preferably, the fixing seat is provided with a first supporting portion and a second supporting portion, the first supporting portion is provided with a light source, and the second supporting portion is provided with an optical fiber connector.
Preferably, the middle part of the fixing seat is provided with a clamping groove for placing the beam splitter, and the beam splitter is clamped in the clamping groove.
Compared with the prior art, the optical path difference detection device comprises a base, wherein a light source, a beam splitter, a first reflector, a second reflector and a swinging piece are arranged on the base, the optical paths of the first transmission light and the second reflection light are equal when the swinging piece is at the initial position, and the first transmission light and the second reflection light generate an optical path difference when the swinging piece drives the first reflector and the second reflector to swing back and forth.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a schematic structural view of a swinging member according to a preferred embodiment of the present invention;
FIG. 4 is a partial schematic view of the oscillating member according to a preferred embodiment of the present invention;
FIG. 5 is a cross-sectional view of the oscillating member in a preferred embodiment of the invention;
the names of the components marked in the figures are as follows:
1. a base; 2. a first swing arm; 201. a first reflector; 21. a second swing arm; 211. a second reflector; 22. a rotating shaft; 23. a drive coil; 24. a drive magnet; 25. a spring bearing; 3. a connecting portion; 31. a fixed part; 32. a U-shaped fixing frame; 4. a mounting seat; 41. a reflective mirror; 5. a first support section; 51. a light source; 52. a second support portion; 53. an optical fiber splice; 6. a fixed seat; 61. a card slot; 62. a beam splitter.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings 1 to 5 and the embodiments.
The invention discloses an interferometer, which comprises a base 1, wherein a light source 51, a beam splitter 62, a first reflector 201, a second reflector 211 and a swinging piece are arranged on the base 1; the beam splitter 62 splits incident light generated by the light source 51 into a projected first light beam and a reflected second light beam; the first light beam is reflected by the first reflector 201 and then is divided into first reflected light and first transmitted light by the beam splitter 62; the second light beam is reflected by the second reflecting mirror 211 and then split into second reflected light and second transmitted light by the beam splitter 62; the first reflecting mirror 201 and the second reflecting mirror 211 are arranged on the swinging piece through the fixing frame, when the swinging piece is at the initial position, the optical paths of the first transmission light and the second reflection light are equal, and when the swinging piece drives the first reflecting mirror 201 and the second reflecting mirror 211 to swing back and forth, the optical path difference is generated between the first transmission light and the second reflection light.
Preferably, the base 1 is provided with the fixing base 6, and the light source 51, the beam splitter 62, the first reflector 201, the second reflector 211 and the swinging member are all arranged on the fixing base 6, so that the positions of the components in the processing process of the fixing base 6 are determined, the installation accuracy of the components on the fixing base 6 is improved, the number of the components needing to be manually adjusted in the installation process is reduced, the installation of the components is facilitated, and the installation accuracy of the components is also improved.
Further, the swinging member includes a first swing arm 2, a second swing arm 21 and a driving shaft, the first reflector 201 is disposed on the first swing arm 2, the second reflector 211 is disposed on the second swing arm 21, a cylindrical connecting portion 3 is formed at a connecting portion of the first swing arm 2 and the second swing arm 21, and the driving shaft is disposed in a middle portion of the connecting portion 3, so that the first swing arm 2 and the second swing arm 21 can reciprocate in the circumferential direction around the driving shaft.
Further, the driving shaft includes a rotating shaft 22, a driving coil 23 and a driving magnet 24, the first swing arm 2 and the second swing arm 21 are disposed on the base 1 through the rotating shaft 22, the driving magnet 24 is disposed on the connecting portion 3, the driving coil 23 is disposed on the fixing base 6, the driving coil 23 is connected to an external power source, when the external power source introduces positive and negative currents into the driving coil 23 in a form of pulses, the driving coil 23 forms a corresponding magnetic field, and the magnetic field and the driving magnet 24 cause the first swing arm 2 and the second swing arm 21 to rotate clockwise or counterclockwise around the rotating shaft 22 under the action of magnetic force.
Further, the rotating shaft 22 is provided with a spring bearing 25, and the spring bearing 25 generates an elastic force along with the deformation of the connecting portion 3 in the circumferential rotation process, and the elastic force has a tendency of returning the connecting portion 3 to the initial position, specifically, when the driving coil 23 is electrified with positive current, the first swing arm 2 and the second swing arm 21 are made to swing clockwise to the preset position, and the duration of the forward current is a preset value, then the driving coil 23 is electrified with reverse current to enable the first swing arm 2 and the second swing arm 21 to swing anticlockwise to preset positions, and the spring bearing 25 is formed to generate an elastic force to cooperate with the magnetic force generated by both the driving magnet 24 and the driving coil 23, therefore, the first swing arm 2 and the second swing arm 21 swing back and forth within the preset range, and the optical path difference generated by the first transmission light and the second reflection light is constant.
Preferably, a fixing portion 31 is formed on the connecting portion 3 in a protruding manner, specifically, a U-shaped fixing frame 32 for fixing the driving magnet 24 is disposed on the fixing portion 31, the driving magnet 24 is disposed in a plurality of groups, the driving magnets 24 are divided into two groups, the two groups of driving magnets 24 are respectively disposed on the inner side wall of the U-shaped fixing frame 32, the driving coil 23 is disposed between the two groups of driving magnets 24 in a suspended manner, when the driving coil 23 is energized to generate a magnetic field and generate an attractive or repulsive magnetic force with the driving magnets 24, and the driving coil 23 is fixed, so that the driving magnet 24 can drive the first swing arm 2 and the second swing arm 21 to reciprocate in the circumferential direction around the rotating shaft 22 through the U-shaped fixing frame 32.
Preferably, the fixing base 6 is provided with two mounting bases 4, the two mounting bases 4 are respectively arranged on two sides of the fixing base 6, and the two mounting bases 4 are respectively provided with a first reflective mirror 41 and a second reflective mirror 41.
Preferably, the fixing base 6 is further provided with a first supporting portion 5 and a second supporting portion 52, the first supporting portion 5 is provided with a light source 51, and the second supporting portion 52 is provided with a spectrometer.
Incident light generated by the light source 51 is reflected to the beam splitter 62 through the reflective mirror 41, the beam splitter 62 divides the incident light into a first transmitted light beam and a second reflected light beam, the first light beam is reflected by the first reflective mirror 201, then passes through the beam splitter 62 again and is divided into a first reflected light and a first transmitted light by the beam splitter 62, the second light beam is reflected by the second reflective mirror 211, then passes through the ice cup of the beam splitter 62 again and is divided into a second reflected light and a second transmitted light, the first transmitted light and the second reflected light form interference light and are emitted to the second reflective mirror 41, and the second reflective mirror 41 reflects the interference light to the optical fiber connector 53 and then is connected with an external spectrometer.
Preferably, the middle of the fixed seat 6 is provided with a clamping groove 61 for placing the beam splitter 62, the beam splitter 62 is clamped in the clamping groove 61, the first swing arm 2 and the second swing arm 21 are respectively located at two sides of the beam splitter 62,
the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, i.e. all equivalent variations and modifications made by the present invention are covered by the scope of the claims of the present invention, which is not limited by the examples herein.
Claims (10)
1. An interferometer is characterized by comprising a base, wherein a light source, a beam splitter, a first reflector, a second reflector and a swinging piece are arranged on the base;
the beam splitter splits incident light generated by the light source into a transmitted first light beam and a reflected second light beam;
the first light beam is reflected by the first reflector and then is divided into first reflected light and first transmitted light by the beam splitter;
the second light beam is reflected by the second reflecting mirror and then is divided into second reflected light and second transmitted light by the beam splitter;
the first reflecting mirror and the second reflecting mirror are arranged on the swinging piece through the fixing frame, when the swinging piece is at the initial position, the optical paths of the first transmission light and the second reflection light are equal, and when the swinging piece drives the first reflecting mirror and the second reflecting mirror to swing back and forth, the optical path difference is generated between the first transmission light and the second reflection light.
2. The interferometer according to claim 1, wherein the base has a fixing base, and the light source, the beam splitter, the first reflector, the second reflector and the oscillating member are fixed to the fixing base.
3. An interferometer according to claim 2, wherein the oscillating member comprises a first oscillating arm, a second oscillating arm, and a drive shaft, the first mirror being disposed on the first oscillating arm, the second mirror being disposed on the second oscillating arm, and the drive shaft being disposed at the junction of the first oscillating arm and the second oscillating arm.
4. The interferometer of claim 3, wherein the driving shaft comprises a rotating shaft, a driving coil, and a driving magnet, the first swing arm and the second swing arm are disposed on the base through the rotating shaft, the driving magnet is disposed at a joint of the first swing arm and the second swing arm, and the driving coil is disposed on the fixing base.
5. An interferometer according to claim 4, wherein the shaft is provided with spring bearings.
6. An interferometer according to claim 4, wherein the first and second swing arms are formed with a fixing portion on which a U-shaped fixing frame for fixing the driving magnet is provided. The drive magnets are provided with a plurality of blocks and are divided into two groups, two groups of drive magnets are respectively arranged on the inner side wall of the U-shaped fixing frame, and the drive coil is arranged between the two groups of drive magnets in a suspension mode.
7. An interferometer according to claim 4, wherein the first and second mirrors are each corner mirrors.
8. The interferometer according to claim 1, wherein the holder has two mounting seats, the two mounting seats are respectively disposed on two sides of the holder, and the two mounting seats have reflectors respectively disposed thereon.
9. An interferometer according to claim 1, wherein the holder has a first support and a second support, the first support having a light source and the second support having a fiber stub.
10. The interferometer according to claim 1, wherein a slot for placing the beam splitter is formed in the middle of the fixing base, and the beam splitter is clamped in the slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011017947.5A CN112162378A (en) | 2020-09-24 | 2020-09-24 | Interferometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011017947.5A CN112162378A (en) | 2020-09-24 | 2020-09-24 | Interferometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112162378A true CN112162378A (en) | 2021-01-01 |
Family
ID=73862822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011017947.5A Pending CN112162378A (en) | 2020-09-24 | 2020-09-24 | Interferometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112162378A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397018A (en) * | 2021-12-30 | 2022-04-26 | 杭州春来科技有限公司 | Adjustable spectral correction system and method |
-
2020
- 2020-09-24 CN CN202011017947.5A patent/CN112162378A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397018A (en) * | 2021-12-30 | 2022-04-26 | 杭州春来科技有限公司 | Adjustable spectral correction system and method |
| CN114397018B (en) * | 2021-12-30 | 2023-08-01 | 杭州春来科技有限公司 | Adjustable spectrum correction system and method |
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