CN105928922B - A kind of N2Molecule, which shakes, turns the measuring system of Raman spectrums - Google Patents
A kind of N2Molecule, which shakes, turns the measuring system of Raman spectrums Download PDFInfo
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- CN105928922B CN105928922B CN201610226530.7A CN201610226530A CN105928922B CN 105928922 B CN105928922 B CN 105928922B CN 201610226530 A CN201610226530 A CN 201610226530A CN 105928922 B CN105928922 B CN 105928922B
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- G—PHYSICS
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- 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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
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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
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- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
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- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/44—Raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
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- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
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Abstract
The invention discloses a kind of N2Molecule, which shakes, turns the measuring system of Raman spectrums.The system is received by transmitter unit and optics and formed with detecting signal unit.Transmitter unit uses 354.8 nm UV light atmospheric molecules of the solid state laser output stage narrow linewidth of injection seeded；Optics receives to be collected by N with detecting signal unit2Shaken caused by molecule and turn Raman spectrum signals, use double grating dispersion system by 384.9 388.6 nm scopes light with 8.3 mm nm‑1Linear dispersion spatially dispersion is come, differentiated using the linear array detector of 32 passages and record N2Molecule, which shakes, turns Raman spectrum O branch（Rotational quantum numberJ=16‑2）And S branch（Rotational quantum numberJ=0‑14）Each discrete spectral Lines signal, while the suppression better than 13 orders of magnitude is produced to light near 354.8 nm.The present invention is realized to N2Molecule Stokes, which shakes, turns resolution and the record of Raman spectrums, and can obtain temperature information.
Description
Technical field
It can differentiate and record by N the present invention relates to one kind2Shaken caused by molecule and turn the measuring system of Raman spectrums.
Background technology
In pole narrow linewidth (<0.1pm) under the irradiation of laser, atmospheric molecule is (mainly including N2And O2Molecule etc.) meeting and laser
Interact and produce secondary radiation.Spectrum caused by secondary radiation, at the same including elasticity Rayleigh spectrum and it is stiff
Raman is composed.Rayleigh composes relative transmission optical maser wavelength without frequency displacement, identical with transmitting optical maser wavelength；Raman spectrum relative transmissions swash
Light wave is different from transmitting optical maser wavelength with frequency displacement.Raman spectrums include pure rotation Raman spectrums and shaken to turn two kinds of Raman spectrums.It is pure
Raman spectrum relative transmission laser waves are rotated with certain frequency displacement, are lived apart in transmitting optical maser wavelength both sides, it is pure caused by different molecular
Raman is rotated to compose the distribution difference on frequency spectrum and mutually overlap mutually.Shake and turn Raman spectrum relative transmission laser waves with bigger frequency
Move, on frequency spectrum range transmission laser farther out, shaken as caused by different molecular turn Raman spectrum also generally divide completely on frequency spectrum
From.
The Raman spectrums of atmospheric molecule are related to temperature, but temperature dependent properties of the spectral intensity on different spectral position are
Different.If the Raman completely as caused by single molecule can be obtained to compose, then, can based on the envelope of whole molecule Raman spectrums
Demarcated without ambient temperature source and directly obtain temperature！But on frequency spectrum, N2And O2The pure rotation Raman spectrums of molecule are mutually overlapping,
It is complete to differentiate N2Or O2The pure rotation Raman spectrums of molecule are extremely difficult, such as, it is desirable to spectrometer system spectrum resolving accuracy reaches
1pm magnitudes, traditional spectrometer can not be competent at this work.Another thinking be measure single molecule Stokes shake turn
Raman is composed.Because shaking for different molecular turns Raman and composed to be separated from each other on frequency spectrum, singlet spacing also relatively more it is big (for example,
0.1nm magnitudes), therefore, molecule shake turn Raman spectrum in theory may by spectrometer differentiate and complete documentation.
N2Molecule abundance in natural atmosphere is maximum, volume accounting 78%, therefore in an atmosphere by N2Shake and turn caused by molecule
Raman spectrum signals are generally most strong.Under wavelength 354.8nm ultraviolet laser radiations, in theory by N2Stokes shakes caused by molecule
Turn Raman spectrums, the discrete spectral line of a rule is shown as on frequency spectrum：Centre wavelength is 386.8nm, and its Q branch spectrum is confined to extremely narrow
Spectral range in (~0.3nm), its O branch is symmetrically distributed in centre wavelength both sides with S branch spectrum, and O branch is composed each spectral line with S branch and existed
Approximate equidistantly (about 0.12nm) distribution on frequency spectrum.Therefore, research and development one kind can be differentiated and record N2Molecule, which shakes, turns Raman spectrums
Measuring system, can carry out for real atmosphere N2Molecule, which shakes, turns the measurement of Raman spectrums, further can obtain based on actual measurement spectrum
Temperature information, this to temperature real-time high-precision detection be very helpful.
The content of the invention
The purpose of the present invention is to propose to a kind of N2Molecule, which shakes, turns the measuring system of Raman spectrums, and the system can be realized to big
By N in gas2Shaken caused by molecule and turn resolution and the record of Raman spectrums.The system is received by transmitter unit and optics and examined with signal
Survey unit composition.Transmitter unit uses the 354.8nm UV lights of the solid state laser output stage narrow linewidth of injection seeded
Atmospheric molecule；Optics receives to be collected by air N with detecting signal unit2Shaken caused by molecule and turn Raman spectrum signals, using double light
Grid dispersion system is by 384.9-388.6nm scopes light with 8.3mm nm-1Linear dispersion scatter in focal plane colouring, it is logical using 32
The linear array detector in road is differentiated and records N2Molecule, which shakes, turns Raman spectrum O branch (rotational quantum number J=16-2) and S branch (rotation quantum
Number J=0-14) each discrete spectral Lines signal, while the suppression better than 13 orders of magnitude is produced to light near 354.8nm.
To achieve these goals, technical scheme provided by the invention is：
A kind of N2Molecule, which shakes, turns the measuring system of Raman spectrums, and the system is by transmitter unit and optics receives and signal detection
Unit forms.Optics is received with detecting signal unit by converging lenses, aperture diaphragm, collimating mirror, bandpass filter, coupling mirror and double
Grating spectrum instrument system forms.Dual grating light spectrometer system is by optical fiber, the first lens 1 and the first grating 1, the second lens 2 and
Two gratings 2, detector composition.Dual grating light spectrometer system is produced to suppression of the light near 354.8nm better than 6 orders of magnitude, high
Effect is transmitted and with 8.3mm nm-1Linear dispersion by 384.9-388.6nm scopes light focal plane colouring scatter come, differentiate and record
N2Molecule, which shakes, turns Raman spectrum O branch (rotational quantum number J=16-2) and each discrete spectral Lines letter of S branch (rotational quantum number J=0-14)
Number.
Converging lenses collect atmospheric molecule caused scattering light under 354.8nm UV lights.Scatter light through aperture
Directional light is changed into from collimating mirror after diaphragm, irradiated after bandpass filter by coupling mirror feed-in dual grating light spectrometer system.Band logical is filtered
Mating plate produces the suppression better than 7 magnitudes to light near 354.8nm, and transmits 381.5- with the transmitance higher than 93%
392.5nm scope light.
Dual grating light spectrometer system is by optical fiber, the first lens 1 and the first grating 1, the second lens 2 and the second grating 2, detection
Device forms.Optical fiber, which provides, facilitates flexible optics access way, by the follow-up grating dispersion of the flashlight feed-in from coupling mirror
System.First lens 1 and the first grating 1, the second lens 2 and the second grating 2 distinguish quasi- Littrow topology layouts, form two groups
The grating dispersion system of cascade；The focal plane of two grating dispersion systems in same vertical face, in same level put down by optical axis
Row and spacing 82.94mm.Double grating dispersion system produces the suppression better than 6 magnitudes to light near 354.8nm, while efficiently
Transmit and with 8.3mm nm-1Linear dispersion spatially dispersion 384.9-388.6nm scopes light.Detector is differentiated and records color
Flashlight after dissipating.
Optical fiber core diameter 0.6mm, numerical aperture 0.12, exit port center is precisely in the focus of the first lens (1).First
The diameter 100mm of lens 1, focal length 400mm, two-sided plating anti-reflection film, 99% is more than to 384.9-388.6 nm scopes light transmission rate；The
One grating 1 is flat reflective balzed grating, incisure density 1200gr mm-1, blaze wavelength 400nm, flare angle is
46.00 °, 46.10 ° of operating angle, diffraction time is three-level.The diameter 130mm of second lens 2, focal length 800mm, two-sided plating is anti-reflection
Film, 99% is more than to 384.9-388.6 nm scopes light transmission rate；Second grating 2 is flat reflective balzed grating, and groove is close
Spend 600gr mm-1, blaze wavelength 386nm, 54.00 ° of flare angle, 55.86 ° of operating angle, diffraction time is seven grades.Detection
Device includes 32 detection channels altogether, and single detection channels photosurface physical size is the mm of 0.8mm × 7.0, adjacent detector passage it
Between have 0.2mm dead band interval, interchannel is away from 1.0mm.Detector photosurface is accurately positioned on the focal plane of the second lens 2, each
The long 7.0mm sides of detection channels photosurface are parallel to vertical direction.
Double grating dispersion system spectral regions are 384.9-388.6nm scopes, linear dispersion 8.3mm nm-1；Detector records
384.9-388.6nm bands of a spectrum signal, single channel bandwidth 0.1nm.Accurate adjustment detector position, ensure the passage of detector the 1st to the 15th
Photosurface center is directed at N successively2Molecule, which shakes, turns each spectral line convergence light centers of Raman spectrum O branch rotational quantum numbers J=16-2, detection
The passage photosurface center of device the 18th to the 32nd is directed at N successively2Molecule shake turn Raman spectrum S branch rotational quantum numbers J=0-14 respectively compose
Congruence optically focused center, the Air conduct measurement N of detector the 16th to the 17th2Molecule, which shakes, turns Raman spectrum Q branch spectrum signals.Therefore, system is real
To N under present 354.8nm ultraviolet laser radiations2Molecule, which shakes, turns resolution and the record of Raman spectrums.
A kind of N as described above2Molecule, which shakes, turns the measuring system of Raman spectrums, bandpass filter and dual grating light spectrometer system
System combination is produced to suppression of the light near 354.8nm better than 13 magnitudes.
A kind of N as described above2Molecule, which shakes, turns the measuring system of Raman spectrums, and dual grating light spectrometer system is using accurate
The grating dispersion system of two groups of cascades of Littrow topology layouts is realized to wavelength in the efficient of 384.9-388.6nm scope light
Transmit and with 8.3mm nm-1Linear dispersion focal plane colouring scatter come.
A kind of N as described above2Molecule, which shakes, turns the measuring system of Raman spectrums, using the linear array for including 32 detection channels
Detector is differentiated and records 384.9-388.6nm scope spectrum signals, single channel bandwidth 0.1nm.The passage of detector the 1st to the 15th according to
Secondary record N2Molecule shake turns Raman spectrum each spectral line signals of O branch rotational quantum numbers J=16-2, the passage of detector the 18th to the 32nd according to
Secondary record N2Molecule, which shakes, turns Raman spectrum each spectral line signals of S branch rotational quantum numbers J=0-14, the passage of detector the 16th to the 17th note
Record N2Molecule, which shakes, turns Raman spectrum Q branch spectrum signals, is realized in 354.8nm ultraviolet laser radiations to by N2Shake and turn caused by molecule
The resolution of Raman spectrums and record.
Compared with prior art, the present invention has advantages below and beneficial effect：
The present invention is realized to by N2Shaken caused by molecule turn Raman spectrum measurement, have appropriate spectrographic detection scope and
Spectrally resolved ability, it can differentiate and record each discrete spectral Lines signal, while signal near 354.8nm optical maser wavelengths be produced enough
The suppression of degree.
Measuring system introduce dual grating light spectrometer system realize resolution to 384.9-388.6nm range signal light with
Record.Dual grating light spectrometer system use optical fiber by the signal of conduction the follow-up dispersion system of feed-in in the form of accurate " spot light "
System.Optical fiber core diameter 0.6mm, numerical aperture 0.12, exit port center is precisely in the focus of lens 1.Dispersion system is by first
Lens (1) and the first grating 1, the second lens 2 and the second grating 2 form.The diameter 100mm of first lens 1, focal length 400mm, it is two-sided
Anti-reflection film is plated, 99% is more than to 384.9-388.6nm scopes light transmission rate；First grating 1 is flat reflective balzed grating, is carved
Line density 1200gr mm-1, blaze wavelength 400nm, flare angle is 46.00 °, 46.10 ° of operating angle, diffraction time three
Level.The diameter 130mm of second lens 2, focal length 800mm, two-sided plating anti-reflection film, is more than to 384.9-388.6nm scope light transmission rates
99%；Second grating 2 is flat reflective balzed grating, incisure density 600gr mm-1, blaze wavelength 386nm, flare angle
54.00 °, 55.86 ° of operating angle, diffraction time is seven grades.First lens 1 and the first grating 1, the second lens 2 and the second grating
The 2 quasi- Littrow topology layouts of difference, form the grating dispersion system of two cascades；The focal plane of two grating dispersion systems is same
In one vertical face, optical axis is parallel in same level and the mm of spacing 82.94.Double grating dispersion system is to light near 354.8nm
Produce the suppression better than 6 magnitudes, high efficiency of transmission and with 8.3mm nm-1Linear dispersion spatially dispersion 384.9-
388.6nm scope light.Detector detects and recorded the 384.9-388.6nm range signal light that dispersion is come.Detector includes 32
Individual detection channels, single detection channels photosurface physical size are 0.8mm × 7.0mm, there is that 0.2mm's is dead between adjacent detector passage
Section is every interchannel is away from 1.0mm.Detector photosurface is accurately positioned on the focal plane of the second lens 2, each detection channels photosurface
Long 7.0mm sides are parallel to vertical direction.Dual grating light spectrometer system channel spectrum area scope is 384.9-388.6nm, line color
Dissipate rate 8.3mm nm-1；Detector each detection channels photosurface horizontal width 0.8mm, single channel bandwidth 0.1nm.Accurate adjustment detector
Position, ensure that the passage photosurface center of detector the 1st to the 15th is directed at N successively2Molecule, which shakes, turns Raman spectrum O branch rotational quantum numbers J
Each spectral line convergence light centers of=16-2, the passage photosurface center of detector the 18th to the 32nd is directed at N successively2Molecule, which shakes, turns Raman
Compose each spectral line convergence light centers of S branch rotational quantum numbers J=0-14, the Air conduct measurement N of detector the 16th to the 17th2Molecule, which shakes, to be turned
Raman composes Q branch spectrum signals.Therefore, system is realized under 354.8nm ultraviolet laser radiations to by N2Shake and turn caused by molecule
The resolution and detection of Raman spectrums.
In measuring system light path, introduce bandpass filter and tentatively provide to light near 354.8nm better than 7 orders of magnitude
Rejection ability；Double grating dispersion system produces the suppression better than 6 orders of magnitude to light near 354.8nm.Final measuring system pair
Nearby light produces the suppression better than 13 orders of magnitude to 354.8nm, it is ensured that the N of measurement2Molecule, which shakes, turns Raman spectrum signals not by strong bullet
The interference of property signal.
Measuring system transmitter unit is extremely narrow as light source, output linewidth using the solid state laser of injection seeded
354.8nm strong laser irradiation atmospheric molecules.Optics receives collects the scattering light from atmospheric molecule with detecting signal unit, is filtering
The opto-electronic conversion and data record of echo signal are realized after ripple, dispersion by detector.Currently, whole measuring system has realized signal
Collection and the automatic operating of data storage.
Brief description of the drawings
Fig. 1 is the measuring system operation principle block diagram of the embodiment of the present invention.
Embodiment
The key of the present invention is to export 354.8nm poles narrow linewidth UV light atmospheric molecule, using a double light
Grid dispersion system realizes the high efficiency of transmission to the 384.9-388.6nm scope light of collection and with 8.3mm nm-1Linear dispersion exist
Focal plane colouring, which is scattered, to be come, and N is recorded using the linear array detector of 32 passages2Molecule, which shakes, turns Raman spectrum O branch (rotational quantum number J=
16-2) and each discrete spectral Lines signal of S branch (rotational quantum number J=0-14), and combine bandpass filter and produce to outer 354.8nm
Neighbouring light is realized to by N better than the suppression of 13 orders of magnitude2Shaken caused by molecule and turn resolution and the record of Raman spectrums.
The present invention is received by transmitter unit and optics and formed with detecting signal unit.Such as accompanying drawing 1.
Transmitter unit uses the solid Nd of an injection seeded:YAG laser produces the ultraviolet light laser (line widths of 354.8nm
Less than 0.1pm), irradiate atmospheric molecule after Ultra-Violet Laser output.
Optics is received with detecting signal unit by converging lenses, aperture diaphragm, collimating mirror, bandpass filter, coupling mirror and double
Grating spectrum instrument system forms.Aperture of mirror 100mm is converged, focal length 300mm, collects the scattered light signal from atmospheric molecule.Hole
Footpath diaphragm is arranged to 3mm with control signal luminous emittance on converging lenses focal plane.Become by the signal of aperture diaphragm by collimating mirror
For directional light, through after bandpass filter by coupling mirror feed-in dual grating light spectrometer system.Bandpass filter to 354.8nm near
Light produces the suppression better than 7 magnitudes, and transmits 381.5-392.5nm scope light with the transmitance higher than 93%.Dual grating light
Spectrometer system is made up of optical fiber, the first lens 1 and the first grating 1, the second lens 2 and the second grating 2, detector.Optical fiber provides
Convenient, flexible optics access way, by the flashlight conduction from coupling mirror and the follow-up dispersion system of feed-in.Optical fiber core diameter
0.6mm, numerical aperture 0.12, exit port center precise positioning is in the focus of the first lens 1.First lens 1 and the first grating
1st, the second lens 2 and the second grating 2 form the grating dispersion system of two groups of cascades, and better than 6 amounts are produced to light near 354.8nm
The suppression of level, while high efficiency of transmission and with 8.3mm nm-1Linear dispersion spatially dispersion 384.9-388.6nm scopes light.
First lens 1 and the second lens 2 are article made to order, and the first grating 1 and the second grating 2 are U.S. Newport company standard product.First
The mm of 1 diameter of lens 100, focal length 400mm, two-sided plating anti-reflection film, 99% is more than to 384.9-388.6nm scopes light transmission rate；The
One grating 1 selects flat reflective balzed grating, incisure density 1200gr mm-1, blaze wavelength 400nm, flare angle is
46.00 °, 46.10 ° of operating angle, diffraction time is three-level.The diameter 130mm of second lens 2, focal length 800mm, two-sided plating is anti-reflection
Film, 99% is more than to 384.9-388.6nm scopes light transmission rate；Second grating 2 is close from flat reflective balzed grating, groove
Spend 600gr mm-1, blaze wavelength 386nm, 54.00 ° of flare angle, 55.86 ° of operating angle, diffraction time is seven grades.Detector
From the multichannel data acquisition system of German Licel companies, its electrooptical device is Japanese Hamamatsu companies H7260
Serial linear array photomultiplier, including 32 detection channels, single channel photosurface physical size are 7mm × 0.8mm, interchannel away from
1mm, channel dead interval 0.2mm.Detector photosurface precise positioning is on the focal plane of the second lens 2.Accurate adjustment detector position, protect
Card detector the 1st to the 15th passage photosurface center is directed at N successively2Molecule, which shakes, turns Raman spectrum O branch rotational quantum numbers J=16-2
Each spectral line converges light center, and the passage photosurface center of detector the 18th to the 32nd is directed at N successively2Molecule, which shakes, turns Raman spectrum S branch turn
Each spectral line convergence light centers of momentum subnumber J=0-14, the Air conduct measurement N of detector the 16th to the 17th2Molecule, which shakes, turns Raman spectrum Q branch
Spectrum signal, realized in 354.8nm ultraviolet laser radiations to by N2Shaken caused by molecule and turn the resolution and detection of Raman spectrums.Visit
Device is surveyed by a netting twine and computer real-time Communication for Power, and is passed automatically under the control of multichannel data acquisition system software kit
Defeated, data storage.
Claims (3)
- A kind of 1. N2Molecule, which shakes, turns the measuring system of Raman spectrums, including transmitter unit, optics receive and detecting signal unit；It is described Optics receives includes converging lenses, aperture diaphragm, collimating mirror, bandpass filter, coupling mirror and dual grating light with detecting signal unit Spectrometer system；Transmitter unit is big less than 0.1pm 354.8nm UV lights using the solid state laser output linewidth of injection seeded Qi leel；Converging lenses collect atmospheric molecule caused scattering light under 354.8nm UV lights, scatter light through aperture diaphragm Directional light is changed into from collimating mirror afterwards, irradiated after bandpass filter by coupling mirror feed-in dual grating light spectrometer system；It is characterized in that：Bandpass filter and dual grating light the spectrometer system combination is produced to suppression of the light near 354.8nm better than 13 magnitudes System；Bandpass filter produces the suppression better than 7 magnitudes to light near 354.8nm, and is transmitted with the transmitance higher than 93% 381.5-392.5nm scope light；Dual grating light spectrometer system is produced to suppression of the light near 354.8nm better than 6 orders of magnitude, with 8.3mm nm-1Line color 384.9-388.6nm scopes light is scattered by the rate of dissipating in focal plane colouring, is differentiated and is recorded N2Molecule, which shakes, turns Raman spectrum O branch and S branch Each discrete spectral Lines signal；O branch rotational quantum number J=16-2, S branch rotational quantum numbers J=0-14；The dual grating light spectrometer system includes optical fiber, the first lens (1) and the first grating (1), the second lens (2) and the second light Grid (2), detector；Optical fiber is by the follow-up grating dispersion system of the flashlight feed-in from coupling mirror；Optical fiber core diameter 0.6mm, number It is worth aperture 0.12, exit port center is precisely in the focus of the first lens (1)；First lens (1) and the first grating (1), Two lens (2) and the second grating (2) quasi- Littrow topology layouts respectively, form the grating dispersion system of two groups of cascades；Two light The focal plane of grid dispersion system is in same vertical face, and optical axis is parallel in same level and spacing 82.94mm；Detector is differentiated And record the flashlight after dispersion；First lens (1) the diameter 100mm, focal length 400mm, two-sided plating anti-reflection film, 384.9-388.6nm scopes light is passed through Rate is more than 99%；First grating (1) is flat reflective balzed grating, incisure density 1200gr mm-1, blaze wavelength 400nm, Flare angle is 46.00 °, and 46.10 ° of operating angle, diffraction time is three-level；Second lens (2) the diameter 130mm, focal length 800mm, two-sided plating anti-reflection film, 384.9-388.6nm scopes light is passed through Rate is more than 99%；Second grating (2) is flat reflective balzed grating, incisure density 600gr mm-1, blaze wavelength 386nm, dodge 54.00 ° of angle of credit, 55.86 ° of operating angle, diffraction time are seven grades.
- A kind of 2. N as claimed in claim 12Molecule, which shakes, turns the measuring system of Raman spectrums, it is characterised in that：The detector includes 32 detection channels altogether, and single detection channels photosurface physical size is 0.8mm × 7.0mm, phase There is 0.2mm dead band interval between adjacent detection channels, interchannel is away from 1.0mm；Detector photosurface is accurately positioned in the second lens (2) on focal plane, each long 7.0mm sides of detection channels photosurface are parallel to vertical direction.
- A kind of 3. N as claimed in claim 22Molecule, which shakes, turns the measuring system of Raman spectrums, it is characterised in that：The detector records 384.9-388.6nm bands of a spectrum signals, single channel bandwidth 0.1nm；The passage light of detector the 1st to the 15th Quick face center is directed at N successively2Molecule, which shakes, turns each spectral line convergence light centers of Raman spectrum O branch rotational quantum numbers J=16-2, detector 18th to the 32nd passage photosurface center is directed at N successively2Molecule, which shakes, turns each spectral line remittances of Raman spectrum S branch rotational quantum numbers J=0-14 Optically focused center, the Air conduct measurement N of detector the 16th to the 17th2Molecule, which shakes, turns Raman spectrum Q branch spectrum signals；System is realized in 354.8nm To N under ultraviolet laser radiation2Molecule, which shakes, turns resolution and the record of Raman spectrums.
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| CN201610226530.7A CN105928922B (en) | 2016-04-13 | 2016-04-13 | A kind of N2Molecule, which shakes, turns the measuring system of Raman spectrums |
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