CN108426834A - A kind of quick light path scanning means - Google Patents
A kind of quick light path scanning means Download PDFInfo
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- CN108426834A CN108426834A CN201810451052.9A CN201810451052A CN108426834A CN 108426834 A CN108426834 A CN 108426834A CN 201810451052 A CN201810451052 A CN 201810451052A CN 108426834 A CN108426834 A CN 108426834A
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- regular hexahedron
- fiber coupler
- light path
- light beam
- circulator
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- 239000000835 fiber Substances 0.000 claims abstract description 34
- 230000010287 polarization Effects 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims description 13
- 239000006117 anti-reflective coating Substances 0.000 claims description 3
- 239000007888 film coating Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000000644 propagated effect Effects 0.000 abstract description 3
- 238000003384 imaging method Methods 0.000 description 13
- 238000012014 optical coherence tomography Methods 0.000 description 13
- 238000001514 detection method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Abstract
The invention discloses a kind of quick light path scanning means, including processor, analog-digital converter, bandpass filter, SLD light sources, balanced detector, circulator, fiber coupler, sample arm module and reference arm module；The sample arm module includes Polarization Controller, the first collimating mirror, light path module and regular hexahedron.The effect that the invention passes through regular hexahedron and retroreflector, the light beam exported from fiber coupler is set to be propagated between regular hexahedron and retroreflector, the scan depths of device are big, in addition light path is adjusted by linear motion compared with the existing technology, the invention rotates regular hexahedron by motor, to adjust the light path of reference arm light beam transmission, governing speed is fast, and present apparatus overall structure is simple, it is easy to accomplish, it is at low cost.
Description
Technical field
The present invention relates to coherence tomography technique fields, more specifically to a kind of quick light path scanning means.
Background technology
Optical Coherence Tomography Imaging Technology is that one kind being based on low-coherent light principle of interference, is a kind of non-contact, high-precision
Detection Techniques.Optical Coherence Tomography Imaging Technology point sometimes domain optical coherence tomography, domain optical coherence tomography and
Frequency sweep optical coherent chromatographic imaging.Time Domain Optical coherence chromatographic imaging is to be based on Michelson's interferometer, passes through optical delay line
Light path scanning is longitudinally carried out to detection direction.This method is the optical signal modulated to reference arm and sample arm by photodiode
It is detected.Domain optical coherence tomography is developed based on Time Domain Optical coherence tomography technique, domain optical
Coherence chromatographic imaging is detected to the optical signal of modulation using Dichroic Optical Elements, and Fourier transformation is carried out to spectral signal
Reconstruct the information of depth direction.This method sweep speed considerably beyond time-domain coherence chromatography imaging technique, it is current in image at
As in equipment.Frequency sweep Optical Coherence Tomography Imaging Technology speed is also faster than domain optical coherence tomography technology, Ke Yiyong
In a wide range of big Depth Imaging, but frequency sweep Optical Coherence Tomography Imaging Technology is expensive, and commercial application value is not high.
In field of industry detection, non-contact automatic detection is increasingly taken seriously, and especially high-precision detection means is more
It is the direction of future development.It is of less demanding to the review time in terms of industrial detection, but the precision and repeatability of inspection are wanted
Ask high.For contact type measurement, although measurement accuracy is very high, human error is insoluble in detection methods.
It can be solved the above problems using Optical Coherence Tomography Imaging Technology, can be realized and be detected with quick high accuracy, simultaneously
Operating personnel need not do any operation, and automatic detection may be implemented.But technical barrier there are one it：For longitudinal depth
Larger detection is relatively difficult, and Time Domain Optical coherence tomography technique may be implemented, but what optical delay line needed
Time is too long, and frequency Optical Coherence Tomography Imaging Technology scan depths are limited, and frequency sweep Optical Coherence Tomography Imaging Technology
Cost is too high.
Invention content
The technical problem to be solved by the present invention is to：How high speed, scan depths height and lower-cost optical coherence are realized
Laminated imaging device.
The solution that the present invention solves its technical problem is：
A kind of quick light path scanning means, including processor, analog-digital converter, bandpass filter, SLD light sources, balance are visited
Survey device, circulator, fiber coupler, sample arm module and reference arm module；The circulator is configured with input terminal, first defeated
Outlet and second output terminal, the optical signal that the circulator is inputted from input terminal are successively transferred to the first output end and second
Output end, the fiber coupler are configured with signal input part, interference signal output end and two signal branch ends；It is described
SLD light sources are connected with circulator input terminal, and the first output end of the circulator is connected with the signal input part of fiber coupler,
Two signal branch ends of the fiber coupler are connected with sample arm module and reference arm module respectively, the fiber coupling
Device interference signal output end and circulator second output terminal are connected with balanced detector input terminal respectively, the balanced detector
Output end is connected with bandpass filter input terminal, and the bandpass filter output end is connected with analog-digital converter input terminal, described
AfD converter output is connected with processor input terminal；The sample arm module includes Polarization Controller, the first collimating mirror, light
Post anti-reflection film and Anti-reflective coating, the light path module packet in four sides of journey module and regular hexahedron, the regular hexahedron
Retroreflector and coupled mirrors are included, the light beam that a signal branch end of the fiber coupler is exported successively passes through
Polarization Controller and the first collimating mirror enter in regular hexahedron, and by regular hexahedron internal reflection, light beam is from regular hexahedron
Outgoing reaches retroreflector, translates and reflects by retroreflector, re-enters into regular hexahedron, again pass by positive six face
Body internal reflection, light beam is emitted from regular hexahedron reaches coupled mirrors, and the light beam of coupled speculum reflection passes through the first standard
Straight mirror enters the signal branch end of fiber coupler.
As a further improvement of the above technical scheme, the light path mould retroreflector in the block is configured with multiple, more
A retroreflector is arranged at outside regular hexahedron, the light beam exported from a signal branch end of fiber coupler,
After the first collimating mirror, transmitted between regular hexahedron and each retroreflector, final beam is emitted to from regular hexahedron
Up to coupled mirrors, the light beam of coupled speculum reflection enters the signal branch of fiber coupler by the first collimating mirror
End.
As a further improvement of the above technical scheme, the sample arm module includes that the second collimating mirror and optically focused are saturating
Mirror, the light beam exported from another signal branch end of fiber coupler successively pass through the second collimating mirror and collector lens
It is radiated in sample to be tested.
The beneficial effects of the invention are as follows：The present invention is made by the effect of regular hexahedron and retroreflector from optical fiber coupling
The light beam of clutch output is propagated between regular hexahedron and retroreflector, and the scan depths of device are big, in addition relative to existing
There is technology to adjust light path by linear motion, the invention rotates regular hexahedron by motor, to adjust reference arm light beam biography
The light path passed, governing speed is fast, and present apparatus overall structure is simple, it is easy to accomplish, it is at low cost.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described.Obviously, described attached drawing is a part of the embodiment of the present invention, rather than is all implemented
Example, those skilled in the art without creative efforts, can also be obtained according to these attached drawings other designs
Scheme and attached drawing.
Fig. 1 is the device of the invention integrated connection schematic diagram.
Specific implementation mode
The technique effect of the design of the present invention, concrete structure and generation is carried out below with reference to embodiment and attached drawing clear
Chu, complete description, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this hair
Bright a part of the embodiment, rather than whole embodiments, based on the embodiment of the present invention, those skilled in the art are not being paid
The other embodiment obtained under the premise of creative work, belongs to the scope of protection of the invention.In addition, be previously mentioned in text
All connection/connection relations not singly refer to component and directly connect, and refer to that can be added deduct according to specific implementation situation by adding
Few couple auxiliary, to form more preferably coupling structure.Each technical characteristic in the invention, in not conflicting conflict
Under the premise of can be with combination of interactions.
Referring to Fig.1, the invention discloses a kind of quick light path scanning means, including processor, analog-digital converter, band
Bandpass filter, SLD light sources, balanced detector, circulator, fiber coupler, sample arm module and reference arm module；The ring
Shape device is configured with input terminal, the first output end and second output terminal, and the optical signal that the circulator is inputted from input terminal is successively
It is transferred to the first output end and second output terminal, the fiber coupler is configured with signal input part, interference signal output end
And two signal branch ends；The SLD light sources are connected with circulator input terminal, the first output end and optical fiber of the circulator
The signal input part of coupler is connected, two signal branch ends of the fiber coupler respectively with sample arm module and reference
Arm module is connected, and the fiber coupler interference signal output end and circulator second output terminal are defeated with balanced detector respectively
Enter end to be connected, the balanced detector output end is connected with bandpass filter input terminal, the bandpass filter output end and mould
Number converter input terminal is connected, and the AfD converter output is connected with processor input terminal；The sample arm module includes
Post increasing in four sides of Polarization Controller, the first collimating mirror 1, light path module and regular hexahedron 4, the regular hexahedron 4
Permeable membrane and Anti-reflective coating, the light path module include retroreflector 3 and coupled mirrors 2, one of the fiber coupler
The light beam that signal branch end is exported successively is entered by Polarization Controller and the first collimating mirror 1 in regular hexahedron 4, is passed through
4 internal reflection of regular hexahedron, light beam are emitted from regular hexahedron 4 and reach retroreflector 3, translate and reflect by retroreflector 3,
It re-enters into regular hexahedron 4, again passes by 4 internal reflection of regular hexahedron, light beam is emitted from regular hexahedron 4 reaches coupling instead
Mirror 2 is penetrated, the light beam that coupled speculum 2 reflects enters the signal branch end of fiber coupler by the first collimating mirror 1.
Specifically, in the invention, the circulator can allow light beam unidirectionally to pass through, while ensure reflected light beam
It can detect.The balanced detector is to convert optical signals into electric signal, and can consider common mode DC and remove.Institute
Polarization Controller is stated for changing light beam in the polarization state of inside of optical fibre, interference is made to be optimal effect.
The invention described device, in use, a signal branch end of the fiber coupler are exported
Light beam successively it is as follows by the transmission path after Polarization Controller and the first collimating mirror 1：Light beam from regular hexahedron 4 one
A face is incident, and the face is defined as front end face herein, and light beam is reflected in front end face, and light reaches rear end face after incidence,
Rear end face reflects, and reaches right side, is reflected in right side, returns to front end face and reflects outgoing in front end face, reaches
The retroreflector 3 being arranged outside regular hexahedron 4, the retroreflector 3 actually include in a certain angle two anti-
Plane is penetrated, light beam is successively reflected from two planes of reflection, and is returned in regular hexahedron 4, and light beam is rolled over by front end face
It is mapped to and reaches right side, reflected in right side and reach rear end face, reflected in rear end face and return to front end face again, be emitted to from front end face
Up to coupled mirrors 2, coupled speculum 2 is reflected into fiber coupler.It can be seen that from the propagation path of above-mentioned light beam
Motor often controls regular hexahedron 4 and rotates one week, you can four scanning.
The light beam of reference arm module described in the invention transmits the following institute of relationship of light path and 4 rotational angle of regular hexahedron
Show.
Wherein S (θ) indicates that light path, L indicate that 4 length of side of regular hexahedron, n indicate the refractive index of 4 end face of regular hexahedron, in other words
It is the refractive index of anti-reflection film, θ indicates the rotation angle of regular hexahedron 4.
The invention makes the light beam exported from fiber coupler by the effect of regular hexahedron 4 and retroreflector 3
It is propagated between regular hexahedron 4 and retroreflector 3, the scan depths of device are big, in addition compared with the existing technology by straight
Line motor adjustment light path, the invention rotate regular hexahedron 4 by motor, to adjust the light path of reference arm light beam transmission, adjust
It is fast to save speed, and present apparatus overall structure is simple, it is easy to accomplish, it is at low cost.
It is further used as preferred embodiment, to further increase the scan depths of device, the invention is specifically real
It applies in mode, configured with multiple, multiple retroreflectors 3 are arranged at just the light path mould retroreflector 3 in the block
Outside hexahedron 4, the light beam exported from a signal branch end of fiber coupler, after the first collimating mirror 1, in positive six face
It is transmitted between body 4 and each retroreflector 3, final beam is emitted from regular hexahedron 4 reaches coupled mirrors 2, coupled anti-
The light beam for penetrating the reflection of mirror 2 enters the signal branch end of fiber coupler by the first collimating mirror 1.
It is further used as preferred embodiment, in the invention specific implementation mode, the sample arm module includes
Second collimating mirror 5 and collector lens 6, the light beam exported from another signal branch end of fiber coupler successively pass through
Second collimating mirror 5 and collector lens 6 are radiated in sample to be tested.
The better embodiment of the present invention is illustrated above, but the invention is not limited to the implementation
Example, those skilled in the art can also make various equivalent modifications or be replaced under the premise of without prejudice to spirit of that invention
It changes, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (3)
1. a kind of quick light path scanning means, it is characterised in that：Including processor, analog-digital converter, bandpass filter, SLD light
Source, balanced detector, circulator, fiber coupler, sample arm module and reference arm module；The circulator is configured with input
End, the first output end and second output terminal, the optical signal that the circulator is inputted from input terminal are successively transferred to the first output
End and second output terminal, the fiber coupler is configured with signal input part, interference signal output end and two signals point
Zhi Duan；The SLD light sources are connected with circulator input terminal, and the first output end of the circulator and the signal of fiber coupler are defeated
Enter end to be connected, two signal branch ends of the fiber coupler are connected with sample arm module and reference arm module respectively, institute
It states fiber coupler interference signal output end and circulator second output terminal is connected with balanced detector input terminal respectively, it is described
Balanced detector output end is connected with bandpass filter input terminal, the bandpass filter output end and analog-digital converter input terminal
It is connected, the AfD converter output is connected with processor input terminal；The sample arm module includes Polarization Controller, first
The motor that collimating mirror (1), light path module, regular hexahedron (4) and driving regular hexahedron (4) rotate, the regular hexahedron (4)
Anti-reflection film and Anti-reflective coating are posted in four sides, and the light path module includes retroreflector (3) and coupled mirrors (2),
The light beam that one signal branch end of the fiber coupler is exported successively passes through Polarization Controller and the first collimating mirror (1)
It enters in regular hexahedron (4), by regular hexahedron (4) internal reflection, light beam is emitted from regular hexahedron (4) and reaches retroreflection
Mirror (3) is translated by retroreflector (3) and is reflected, and is re-entered into regular hexahedron (4), is again passed by regular hexahedron (4)
Portion is reflected, and light beam is emitted from regular hexahedron (4) reaches coupled mirrors (2), and the light beam of coupled speculum (2) reflection passes through the
One collimating mirror (1) enters the signal branch end of fiber coupler.
2. a kind of quick light path scanning means according to claim 1, it is characterised in that：The light path mould is in the block backward
Speculum (3) is configured with multiple, and it is external that multiple retroreflectors (3) are arranged at regular hexahedron (4), from fiber coupler
A signal branch end output light beam, after the first collimating mirror (1), in regular hexahedron (4) and each retroreflector
(3) it is transmitted between, final beam is emitted from regular hexahedron (4) reaches coupled mirrors (2), coupled speculum (2) reflection
Light beam enters the signal branch end of fiber coupler by the first collimating mirror (1).
3. a kind of quick light path scanning means according to claim 2, it is characterised in that：The sample arm module includes the
Two collimating mirrors (5) and collector lens (6), the light beam exported from another signal branch end of fiber coupler are successively logical
It crosses the second collimating mirror (5) and collector lens (6) is radiated in sample to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810451052.9A CN108426834A (en) | 2018-05-11 | 2018-05-11 | A kind of quick light path scanning means |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810451052.9A CN108426834A (en) | 2018-05-11 | 2018-05-11 | A kind of quick light path scanning means |
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| Publication Number | Publication Date |
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| CN201810451052.9A Pending CN108426834A (en) | 2018-05-11 | 2018-05-11 | A kind of quick light path scanning means |
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Cited By (2)
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Effective date of registration: 20221226 Address after: 528000 room 306, third floor, building a, group 1, phase I, Guangdong biomedical industry base, Xianxi section, national highway 321, Shishan town, Nanhai District, Foshan City, Guangdong Province Applicant after: Foshan Linguistic Technology Co.,Ltd. Address before: 528000 Foshan Institute of science and technology, Xianxi reservoir West Road, Shishan town, Nanhai District, Foshan City, Guangdong Province Applicant before: FOSHAN University |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180821 |