CN110411564A - A kind of all band is without the long standard sources of empty window wave and Wavelength calibration method - Google Patents
A kind of all band is without the long standard sources of empty window wave and Wavelength calibration method Download PDFInfo
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- CN110411564A CN110411564A CN201910784967.6A CN201910784967A CN110411564A CN 110411564 A CN110411564 A CN 110411564A CN 201910784967 A CN201910784967 A CN 201910784967A CN 110411564 A CN110411564 A CN 110411564A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000003595 spectral effect Effects 0.000 claims abstract description 79
- 238000001228 spectrum Methods 0.000 claims abstract description 36
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000001675 atomic spectrum Methods 0.000 claims description 2
- 238000009738 saturating Methods 0.000 claims 1
- 238000001069 Raman spectroscopy Methods 0.000 description 4
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000001237 Raman spectrum Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/44—Raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
- G01J2003/102—Plural sources
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
A kind of all band is related to standard of wavelength light source field without the long standard sources of empty window wave and Wavelength calibration method.Including set gradually wide spectrum light source, achromatic lens to, pin hole, the first collimation lens, optical standard tool, half-reflection and half-transmission beam splitter, the second collimation lens, atomic spectral line light source；Wide spectrum light source combination achromatic lens to and pin hole to emit the continuous spectrum light beam by space filtering, the continuous spectrum light beam generates the light beam of comb δ function formula by optical standard tool filtering, it recycles half-reflection and half-transmission beam splitter that the light beam of the light beam of comb δ function formula and the known atomic spectral line of transmitting is carried out conjunction beam, the light beam for carrying known atomic spectral line in comb δ function formula secretly is obtained with this.
Description
Technical field
The present invention relates to standard of wavelength light source fields more particularly to a kind of all band without the long standard sources of empty window wave and wavelength
Scaling method.
Background technique
Currently, for spectrometer wavelength calibration standard sources generally use such as neon lamp of the light source with atomic emission line,
Mercury lamp, argon lamp etc. (Wang Pengcheng etc., metering journal, 2007, volume 28, the z1 phase, 169-173 pages), these standard lamp source packets
It the spectral line limited amount that contains and is unevenly distributed, usually can leave sky window in some wave bands.Using these atomic spectral line lamp sources into
When row spectroscopic calibration, due to standard spectrum line limited amount and it is unevenly distributed, it is difficult to the wavelength offset trend of each position on spectrum axis
With accurate perception, although the available preferable calibration near position of spectral line, and the farther away place of spectral line is being left, wavelength
Accuracy is often difficult to ensure.
It realizes with the light source that spectral line quantity is intensive and is evenly distributed, it can be by utilizing the optics with high-fineness
The comb filtering function of etalon filter to wide spectrum light source obtain (Xiong Sheng army etc., Chinese patent,
It CN2015102613599), is in comb teeth-shaped spectral line by the light source light spectrum that optical standard tool filters, the wavelength of these spectral lines is method
The resonant wavelength of F-P etalon resonant cavity is evenly distributed and intensive spectral line it is hereby achieved that a series of.However,
The chamber that the wavelength of these spectral lines depends on etalon is long, is influenced by machining accuracy, and the shadow vulnerable to factors such as temperature, stress
It rings and changes, therefore, it is difficult to become a constant standard of wavelength light source.
Summary of the invention
It is an object of the invention to solve the above problem in the prior art, a kind of all band is provided without empty window standard of wavelength
One wide spectrum light source is filtered out pectination spectral line by optical standard tool, then mutually tied with atomic spectral line by light source and Wavelength calibration method
It closes, has the wavelength of each comb teeth spectral line by real-time calibration optical standard, to realize that spectral line quantity is intensive and be evenly distributed
Standard of wavelength light source.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of all band without the long standard sources of empty window wave, including set gradually wide spectrum light source, achromatic lens is to, needle
Hole, the first collimation lens, optical standard tool, half-reflection and half-transmission beam splitter, the second collimation lens, atomic spectral line light source；The wide range
Light source, achromatic lens to, pin hole, the first collimation lens and optical standard tool coaxial arrangement, the half-reflection and half-transmission beam splitter inclines
Tiltedly setting, second collimation lens and atomic spectral line light source are sequentially coaxially set to the lower section of half-reflection and half-transmission beam splitter；
The wide spectrum light source is used to emit the light of continuous spectrum, and the achromatic lens is to for launching wide spectrum light source
Light refocusing, the pin hole is used to carry out the light of refocusing space filtering, and first collimation lens is for will be through
The light beam of needle passing hole space filtering is collimated, and the optical standard tool carries out comb filtering for being directed at collimated optical beam, so that light
The spectrum of beam becomes pectination spectral line by continuous spectrum；
The atomic spectral line light source is used to emit the atomic spectral line of known wavelength value, and second collimation lens is used for will be former
Sub- spectral line light beam is collimated；
The half-reflection and half-transmission beam splitter is used for atomic spectral line light beam and the comb spectrum linear light filtered by optical standard tool
Shu Jinhang closes beam, to obtain spectral shape as the light beam of pectination spectral line mixing atomic spectral line.
The half-reflection and half-transmission beam splitter is all band beam splitter of half-reflection and half-transmission.
A kind of Wavelength calibration method of all band without the long standard sources of empty window wave, comprising the following steps: choose known to two
The atomic spectral line of wavelength demarcates the wavelength of two close pectination spectral lines with this two atomic spectral lines, and counts this two
Comb teeth quantity between pectination spectral line, then with the stringent equal principle of optical standard tool pectination spectral line frequency spacing, calculate calibration
The actual wavelength value of each pectination spectral line.
Compared with the existing technology, the beneficial effect that technical solution of the present invention obtains is:
1, the present invention uses optical standard tool and half-reflection and half-transmission beam splitter by atomic spectral line light source and comb spectrum linear light source phase
In conjunction with building standard of wavelength light source of all band without empty window, atomic spectral line standard sources, standard of wavelength light source of the invention are compared
Have the characteristics that spectral line quantity is intensive, be evenly distributed, all band distribution；Light can be observed using standard of wavelength light source of the invention
Exact wavelength shift on spectrometer all wavelengths position, and then all band can accurately be calibrated；
2, the spectral profile situation of standard of wavelength light source of the invention can be carried out by the parameter of selection optical standard tool
Design can also change position and the distribution density of spectral line by changing temperature, the inclination angle etc. of optical standard tool, and have spectrum
Line real-time calibration function, can meet the calibration requirements of different type spectrometer；
3, the present invention feature uniform with optical standard tool spectral profile, makes it in the Raman shift school of Raman spectrometer
There is unique advantage in standard, since the frequency spacing of optical standard tool spectral line is equal, thus the drawing in raman spectrum between spectral line
Graceful displacement will be stringent equal, can also be in the case where not carrying out wavelength (or absolute wave number) correction in conjunction with Raman standard sample
Raman shift is calibrated.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the spectral composition composition schematic diagram that the embodiment of the present invention generates.
Appended drawing reference: wide spectrum light source 1, achromatic lens is to 2, pin hole 3, the first collimation lens 4, optical standard tool 5, atom
Spectral line light source 6, the second collimation lens 7, half-reflection and half-transmission beam splitter 8.
Specific embodiment
In order to be clearer and more clear technical problems, technical solutions and advantages to be solved, tie below
Drawings and examples are closed, the present invention is described in further details.
As shown in Figure 1, the embodiment of the present invention includes wide spectrum light source 1, achromatic lens is to 2, pin hole 3, the first collimation lens
4, optical standard tool 5, atomic spectral line light source 6, the second collimation lens 7, half-reflection and half-transmission beam splitter 8；The wide spectrum light source, achromatism
Lens to, pin hole, the first collimation lens and optical standard tool coaxial arrangement, the half-reflection and half-transmission beam splitter is obliquely installed, described
Second collimation lens and atomic spectral line light source are sequentially coaxially set to the lower section of half-reflection and half-transmission beam splitter.
Working principle of the present invention is as follows:
Wide spectrum light source 1 issues the light of continuous spectrum, focuses on pin hole 3 by achromatic lens to 2, empty through needle passing hole 3
Between filtered light beam be again incident on optical standard tool 5 after first collimation lens 4 collimation, by optical standard tool 5
The spectrum of comb filtering, light beam becomes pectination spectral line by continuous spectrum；The atomic spectra of the transmitting known wavelength value of atomic spectral line light source 6
Line carries out conjunction beam by half-reflection and half-transmission beam splitter 8 and comb spectrum Line beam, ultimately forms light after the second collimation lens 7 collimation
Spectral shape is the light beam of pectination spectral line mixing atomic spectral line.
The wavelength real-time calibration method of pectination spectral line of the present invention is as follows:
Standard sources of the invention is detected using spectrometer to be calibrated, in the spectrogram wave-length coverage that spectrometer collection arrives
Interior, spectrogram includes a series of pectination spectral line { λ1, λ2, λ3... λn... and several atomic spectral lines, as shown in Fig. 2, any choosing
It selects two of them atomic spectral line and is denoted as λa1、λa2, and find out the pectination spectral line nearest with two atomic spectral lines and be denoted as λn1、λn2, on
State spectral line code name λa1、λa2、λn1、λn2The wavelength values of expression are the measured value that spectrometer to be calibrated is surveyed；
Two selected measured values are λa1、λa2The actual value of atomic spectral line beThen measured value is λn1、
λn2The actual value of pectination spectral line can respectively indicate are as follows:
Since the frequency spacing of pectination spectral line is strictly equal, indicate that the spacing difference reciprocal of line wavelength is equal, therefore
It is λ for nth (any one) measured value in spectrogramnPectination spectral line actual valueMeet following formula relationship:
Wherein, n1 and n2 is pectination spectral line λ respectivelyn1And λn2Series number；
The above-mentioned formula of simultaneous (1) (2) (3) can derive the actual value of nth pectination spectral line are as follows:
By above-mentioned scaling method, can obtain every spectral line in real time in the definite wavelength value at measurement moment, overcome by
The uncertainty of line wavelength caused by the long precision of chamber and environmental factor of optical standard tool, obtains all band without empty window with this
Standard of wavelength light source.Standard of wavelength light source of all band of the present invention without empty window is intensively uniformly distributed on spectrum axis comprising a series of
Known spectral line, all wavelengths position of spectrometer spectrum axis can accurately be corrected, be had broad application prospects, it is special
Not in Raman spectrum field.
Claims (3)
1. a kind of all band is without the long standard sources of empty window wave, it is characterised in that: wide spectrum light source, achromatism including setting gradually are saturating
Mirror to, pin hole, the first collimation lens, optical standard tool, half-reflection and half-transmission beam splitter, the second collimation lens, atomic spectral line light source；Institute
State wide spectrum light source, achromatic lens to, pin hole, the first collimation lens and optical standard tool coaxial arrangement, the half-reflection and half-transmission point
Shu Jing is obliquely installed, and second collimation lens and atomic spectral line light source are sequentially coaxially set to the lower section of half-reflection and half-transmission beam splitter；
The wide spectrum light source is used to emit the light of continuous spectrum, and the achromatic lens is to the light for launching wide spectrum light source
Line refocusing, the pin hole are used to carry out space filtering to the light of refocusing, and first collimation lens will be for that will pass through needle
The light beam of hole space filtering is collimated, and the optical standard tool carries out comb filtering for being directed at collimated optical beam, so that light beam
Spectrum becomes pectination spectral line by continuous spectrum；
The atomic spectral line light source is used to emit the atomic spectral line of known wavelength value, and second collimation lens is used for atomic spectra
Line beam is collimated；
The half-reflection and half-transmission beam splitter be used for by atomic spectral line light beam and by optical standard tool filtering comb spectrum Line beam into
Row closes beam, to obtain spectral shape as the light beam of pectination spectral line mixing atomic spectral line.
2. a kind of all band as described in claim 1 is without the long standard sources of empty window wave, it is characterised in that: the half-reflection and half-transmission point
The all band beam splitter of Shu Jingwei half-reflection and half-transmission.
3. a kind of Wavelength calibration method of the described in any item all bands of claim 1~2 without the long standard sources of empty window wave, special
Sign is to be demarcated with this two atomic spectral lines close the following steps are included: choose the atomic spectral line of two known wavelengths
The wavelength of two pectination spectral lines, and the comb teeth quantity between two pectination spectral lines is counted, then have pectination spectral line with optical standard
The stringent equal principle of frequency spacing, calculates the actual wavelength value of each pectination spectral line of calibration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910784967.6A CN110411564A (en) | 2019-08-23 | 2019-08-23 | A kind of all band is without the long standard sources of empty window wave and Wavelength calibration method |
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| CN201910784967.6A CN110411564A (en) | 2019-08-23 | 2019-08-23 | A kind of all band is without the long standard sources of empty window wave and Wavelength calibration method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712689A (en) * | 2014-01-02 | 2014-04-09 | 上海朗研光电科技有限公司 | Continuous laser device spectral line width measurement device based on optical frequency comb |
| CN105241482A (en) * | 2015-10-14 | 2016-01-13 | 中国船舶重工集团公司第七一五研究所 | Active fiber grating sensor wavelength demodulation system and method |
| JP2017181233A (en) * | 2016-03-30 | 2017-10-05 | 国立大学法人東北大学 | Displacement measuring apparatus and displacement measuring method |
| CN210464664U (en) * | 2019-08-23 | 2020-05-05 | 厦门大学 | Full-waveband blank-window-free wavelength standard light source |
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2019
- 2019-08-23 CN CN201910784967.6A patent/CN110411564A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712689A (en) * | 2014-01-02 | 2014-04-09 | 上海朗研光电科技有限公司 | Continuous laser device spectral line width measurement device based on optical frequency comb |
| CN105241482A (en) * | 2015-10-14 | 2016-01-13 | 中国船舶重工集团公司第七一五研究所 | Active fiber grating sensor wavelength demodulation system and method |
| JP2017181233A (en) * | 2016-03-30 | 2017-10-05 | 国立大学法人東北大学 | Displacement measuring apparatus and displacement measuring method |
| CN210464664U (en) * | 2019-08-23 | 2020-05-05 | 厦门大学 | Full-waveband blank-window-free wavelength standard light source |
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