CN209590271U - A kind of measuring device of space length - Google Patents
A kind of measuring device of space length Download PDFInfo
- Publication number
- CN209590271U CN209590271U CN201822096235.1U CN201822096235U CN209590271U CN 209590271 U CN209590271 U CN 209590271U CN 201822096235 U CN201822096235 U CN 201822096235U CN 209590271 U CN209590271 U CN 209590271U
- Authority
- CN
- China
- Prior art keywords
- optical
- laser
- detection
- space length
- ccd
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of measuring devices of space length, the super continuous spectrums laser of this measuring device accesses optical combiner through reference optical fiber through the reference laser that optical splitter separates, detection laser emits through optical circulator to the detection optical transmitting set of space length L, the light being reflected back is through circulator to optical combiner, each wavelength laser after grating dispersion device dispersion reaches CCD waveguide array detector, and the output of CCD connects data processing unit.The relevant testing laser light beam that super continuous spectrums laser generates when the present apparatus measures, dispersion beam splitting, CCD waveguide array detector sample it to obtain wavelength-strength signal, are converted to spatial-intensity relationship, realize the measurement of high-precision space length.High-precision linear measure longimetry can be realized without wavelength tuning in the utility model, and measurement accuracy is high, and realization principle is simple.
Description
Technical field
The utility model relates to a kind of length measurement technique fields, and in particular to a kind of space length measuring device.
Background technique
Length carries out high-precision measurement as one of seven fundamental physical quantities, to it, the basic exploratory development to forward position
Application with advanced technology has vital meaning.With industrial technologies such as aerospace, car networking, laser radar ranges
Fast development, the demand to space length accurate measurement is also more more and more urgent." space length " refers to that tested media is rolled over
The length that rate is surveyed by 1 (such as vacuum or air), that is, the distance that laser transmits in air are penetrated, is different from light in other Jie
Light path in matter.
It is at present laser light splitting, the detection through certain space distance L with the method for common laser of narrowband measurement space length
Light and reference light are relevant, and both CCD sampled measurements phase interference state obtains space length L.But due to laser of narrowband spectrum
Very narrow, the data sample of CCD sampling is limited, is unable to get high-precision resolution ratio.In addition common laser of narrowband spectrum is uneven,
The error of CCD sampled data is larger, and the accuracy of measurement is not high, and current highest measurement accuracy is only 20 μm.
A kind of space length measuring device of more high measurement accuracy is needed at present.
Utility model content
The purpose of this utility model is to design a kind of space length measuring device, using super continuous spectrums laser, through optical branching
Device separates reference laser and detection laser, and reference laser accesses optical combiner through reference optical fiber, and detection laser connects through optical circulator
Enter and detects optical transmitting set, the detection reflective optical system of transmitting to distance L；The light being reflected back closes Shu Gan through circulator to optical combiner
Enter grating dispersion device after relating to, each wavelength laser after dispersion completely arrives at the detection window of ccd array detector, CCD wavelength
The output end of detector array accesses data processing unit through electrical signal line.Reference laser accesses optical combiner through reference optical fiber；
Detection laser becomes reception laser through optical circulator, detection optical transmitting set, detection reflective optical system and also accesses optical combiner, photosynthetic
The two-beam of road device input closes beam, multi-wavelength light interference, and interference laser is output to grating dispersion device, multi-wavelength light dispersion beam splitting,
It is irradiated to the waveguide array detector of CCD, CCD waveguide array detector samples it to obtain wavelength-strength signal, thus obtain
Spatial-intensity relationship realizes the measurement of space length, has measurement accuracy height, the simple feature of realization principle.
A kind of space length measuring device of the utility model design, including super continuous spectrums laser source, optical splitter, reference
Optical fiber, optical circulator, detection optical transmitting set, detection reflective optical system, optical combiner, grating dispersion device, CCD waveguide array detector
And data processing unit.
The super continuous spectrums laser source connects optical splitter, the reference of the output port output of optical splitter through optical fiber
Laser connects an input port of optical combiner, the detection laser of the another output mouth output of optical splitter through reference optical fiber
The first port of optical circulator is connect through optical fiber, the second port of optical circulator is through optical fiber connecting detection optical transmitting set, detection light hair
It is atmosphere or vacuum, the two distance L between emitter and detection reflective optical system；The third port of optical circulator connects photosynthetic through optical fiber
Another input port of road device, two-way inputs photosynthetic beam interferometer in optical combiner, and the interference laser of optical combiner output connects
Enter grating dispersion device, the detection window of the output end face CCD waveguide array detector of grating dispersion device, grating dispersion device dispersion
Each wavelength laser afterwards completely arrives at the detection window of ccd array detector, and the output end of CCD waveguide array detector is through telecommunications
Number line accesses data processing unit.
The broad band laser spectral centroid wavelength that the super continuous spectrums laser source generates is 1525nm~1625nm, spectral width
For 0.8nm~80nm.
The detection reflective optical system is the reflector that frequency domain reflection is carried out to broad band laser.
The broad band laser is spectral flatness better than 7dB/nm, and output power variation is less than or equal to 0.5dB per minute
Broad band laser.
A kind of space length measuring device of the utility model design, the super continuous spectrums laser source generate steady and continuous
Broad band laser accesses the optical splitter, is divided into reference laser and detection laser.Reference laser accesses photosynthetic road through reference optical fiber
Device；Detection laser enters the first port of optical circulator, is output to detection optical transmitting set through second port, detection optical transmitting set will
Detection laser orientation emits to form transmitting laser, and the space length for detecting optical transmitting set and detecting between reflective optical system is L, described
The transmitting laser reflection that detection reflective optical system will test optical transmitting set transmitting returns detection optical transmitting set, forms reflection laser.Detection
Optical transmitting set receives reflection laser and makes reception laser, and is sent into the second port of optical circulator, and optical circulator is by second
The reception laser of port input is sent to third port and is output to optical combiner.Pass through the ginseng of reference optical fiber in the optical combiner
The reception laser for examining laser and the output of optical circulator third port carries out conjunction beam interferometer, forms interference laser and is output to grating dispersion
Device.The interference laser that the grating dispersion device exports optical combiner carries out spatial dispersion, is split by different wave length, is formed
For the light distribution of different wave length in the spatial beam of the different position in space, which is irradiated to CCD waveguide array detector
On, CCD waveguide array detector samples the strength signal of different wavelengths of light, obtains wavelength-strength signal, this signal hair
It is sent to data processing unit, the relationship being changed between spatial-intensity obtains detection optical transmitting set and detects between reflective optical system
Space length value.
Compared with prior art, a kind of space length measuring device of the utility model has the advantage that 1, sheet is practical new
The scheme that type provides is based on super continuous spectrums laser and CCD detection carries out space length measurement, and super continuous spectrums laser generates spectrum
Width reaches the coherent laser beam of tens nanometer, and high-precision linear measure longimetry can be realized without wavelength tuning；If 2, super continuous
The central wavelength of laser is composed as 1550nm, spectral width 80nm, measurement accuracy resolution ratio can reach 15 μm, compare the prior art
Measurement accuracy it is about high by 25%；3, using existing optical instrument, it is easy to accomplish；Suitable for aerospace, car networking, laser thunder
Up to ranging etc. to the high-acruracy survey of space length.
Detailed description of the invention
Fig. 1 is this space length measuring device example structure block diagram.
Specific embodiment
Further to illustrate that the utility model is the technical means and efficacy reaching predetermined purpose and being taken, below in conjunction with
The utility model is described in detail as rear in attached drawing.
This space length measuring device embodiment is as shown in Figure 1, include super continuous spectrums laser source, optical splitter, reference light
Fibre, optical circulator, detection optical transmitting set, detection reflective optical system, optical combiner, grating dispersion device, CCD waveguide array detector and
Data processing unit.Solid line connecting line indicates optical fiber connection in figure, and dashed connection line indicates the light connects in atmosphere, click and sweep connection
Line indicates electric signal connection.
The broad band laser spectral wavelength ranges that this example super continuous spectrums laser source generates are 1550nm ± 40nm.
This example super continuous spectrums laser source connects optical splitter, the reference of the output port output of optical splitter through optical fiber
Laser connects an input port of optical combiner, the detection laser of the another output mouth output of optical splitter through reference optical fiber
The first port of optical circulator is connect 1. through optical fiber, and the second port of optical circulator is 2. through optical fiber connecting detection optical transmitting set, this example
Detecting between optical transmitting set and detection reflective optical system is atmosphere, the two distance L；This example detect reflective optical system be to broad band laser into
The reflector of line frequency domain reflection.3. the third port of optical circulator connects grating dispersion device, the output of grating dispersion device through optical fiber
Rectify the detection window to CCD waveguide array detector, be therebetween also atmosphere, each wavelength after grating dispersion device dispersion swashs
Light completely arrives at the detection window of ccd array detector, and the output end of CCD waveguide array detector accesses data through electrical signal line
Processing unit.
Above-described embodiment is only further described the purpose of this utility model, technical scheme and beneficial effects
Specific case, the utility model are not limited to this.All any modifications made within the scope of disclosure of the utility model,
Equivalent replacement, improvement etc., are included in the protection scope of the present invention.
Claims (4)
1. a kind of space length measuring device, including super continuous spectrums laser source and optical splitter, it is characterised in that: further include reference
Optical fiber, optical circulator, detection optical transmitting set, detection reflective optical system, optical combiner, grating dispersion device, CCD waveguide array detector
And data processing unit；
The super continuous spectrums laser source connects optical splitter, the reference laser of the output port output of optical splitter through optical fiber
An input port of optical combiner is connect through reference optical fiber, the detection laser of the another output mouth output of optical splitter is through light
Fibre connects the first port of optical circulator, and the second port of optical circulator detects optical transmitting set through optical fiber connecting detection optical transmitting set
It is atmosphere or vacuum, the two distance L between detection reflective optical system；The third port of optical circulator connects grating dispersion through optical fiber
Device, the detection window of the output end face CCD waveguide array detector of grating dispersion device, each wavelength after grating dispersion device dispersion
Laser completely arrives at the detection window of ccd array detector, and the output end of CCD waveguide array detector accesses number through electrical signal line
According to processing unit.
2. space length measuring device according to claim 1, it is characterised in that:
The broad band laser spectral centroid wave-length coverage that the super continuous spectrums laser source generates is 1525nm~1625nm, spectral width
For 0.8nm~80nm.
3. space length measuring device according to claim 1, it is characterised in that:
The detection reflective optical system is the reflector that frequency domain reflection is carried out to broad band laser.
4. space length measuring device according to any one of claim 1 to 3, it is characterised in that:
The broad band laser that the super continuous spectrums laser source generates is spectral flatness better than 7dB/nm, and output power variation is per minute
Broad band laser less than or equal to 0.5dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822096235.1U CN209590271U (en) | 2018-12-13 | 2018-12-13 | A kind of measuring device of space length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822096235.1U CN209590271U (en) | 2018-12-13 | 2018-12-13 | A kind of measuring device of space length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209590271U true CN209590271U (en) | 2019-11-05 |
Family
ID=68349278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822096235.1U Active CN209590271U (en) | 2018-12-13 | 2018-12-13 | A kind of measuring device of space length |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209590271U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109343068A (en) * | 2018-12-13 | 2019-02-15 | 中国电子科技集团公司第三十四研究所 | A kind of measuring device and measuring method of space length |
| CN111232557A (en) * | 2020-01-09 | 2020-06-05 | 中国矿业大学 | Distributed scraper conveyor working surface straightness detection device and method based on optical fiber sensing |
| CN114152591A (en) * | 2021-12-03 | 2022-03-08 | 中国电子科技集团公司第三十四研究所 | Position and wavelength demodulation system and method for cascade fiber grating sensing array |
-
2018
- 2018-12-13 CN CN201822096235.1U patent/CN209590271U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109343068A (en) * | 2018-12-13 | 2019-02-15 | 中国电子科技集团公司第三十四研究所 | A kind of measuring device and measuring method of space length |
| CN111232557A (en) * | 2020-01-09 | 2020-06-05 | 中国矿业大学 | Distributed scraper conveyor working surface straightness detection device and method based on optical fiber sensing |
| CN111232557B (en) * | 2020-01-09 | 2020-11-24 | 中国矿业大学 | Distributed scraper conveyor working surface straightness detection device and method based on optical fiber sensing |
| CN114152591A (en) * | 2021-12-03 | 2022-03-08 | 中国电子科技集团公司第三十四研究所 | Position and wavelength demodulation system and method for cascade fiber grating sensing array |
| CN114152591B (en) * | 2021-12-03 | 2024-02-13 | 中国电子科技集团公司第三十四研究所 | Position and wavelength demodulation system and method of cascade fiber bragg grating sensing array |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Withayachumnankul et al. | Fundamentals of measurement in terahertz time-domain spectroscopy | |
| JP5250736B2 (en) | Criteria for beat spectrum of optical frequency comb | |
| CN209590271U (en) | A kind of measuring device of space length | |
| CN107872274B (en) | Method for measuring dispersion coefficient of optical fiber | |
| CN103063304B (en) | Image plane interference Hyper spectral Imaging device and method is sheared in dispersion | |
| CN110646805B (en) | Frequency modulation continuous wave laser ranging system based on virtual sweep frequency light source | |
| CN104568819A (en) | All-fiber transmission reflection integrated terahertz time-domain spectroscopy system | |
| CN105699317A (en) | Terahertz time-domain spectrograph capable of entering at fixed angle and simultaneously detecting transmission and reflection | |
| CN103076092B (en) | Interference imaging spectroscopy device and method for improving spectral resolution | |
| CN103674287B (en) | A kind of optical maser wavelength based on etalon monitors device | |
| CN108562237B (en) | Device and method for performing spectrum calibration in optical frequency domain reflection sensing system by adopting HCN (hydrogen cyanide) air chamber | |
| CN113503901B (en) | Device and method for eliminating measurement signal jitter of white light interferometer | |
| CN107894327B (en) | Measuring device for optical fiber dispersion coefficient | |
| CN110207733B (en) | Optical fiber interferometer arm length difference measuring device and method based on sweep frequency laser | |
| CN110375781B (en) | Adaptive data acquisition system with variable measurement range in OFDR (offset OFDR) | |
| CN110132138A (en) | Double swept light source range-measurement systems and method based on cascade interferometer | |
| CN114384045B (en) | Trace gas concentration and path length real-time detection system and method | |
| CN110274880A (en) | A kind of optical spectrum detecting method and system of high-precision spatial resolution | |
| CN111678584A (en) | Optical fiber vibration measuring device with light source frequency shift calibration auxiliary channel and method | |
| CN106093962B (en) | A kind of interference velocity-measuring system and method | |
| CN105785386A (en) | High-precision frequency-modulation continuous wave laser ranging system based on F-P etalon | |
| CN103644859A (en) | Device and method used for measuring deformation of diamond anvil under high temperature high pressure condition | |
| CN110243472B (en) | Self-calibration integrated high-speed real-time spectrum analyzer based on dispersion Fourier transform | |
| CN109269418A (en) | Optical fiber calibration system and application method based on gas absorption cell calibration | |
| CN104655029B (en) | A kind of position phase reinforced membranes method for measuring thickness and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |