CN208013076U - The orientation detection light path of high time resolution - Google Patents
The orientation detection light path of high time resolution Download PDFInfo
- Publication number
- CN208013076U CN208013076U CN201820476730.2U CN201820476730U CN208013076U CN 208013076 U CN208013076 U CN 208013076U CN 201820476730 U CN201820476730 U CN 201820476730U CN 208013076 U CN208013076 U CN 208013076U
- Authority
- CN
- China
- Prior art keywords
- quantum cascade
- cascade laser
- tunable quantum
- frequency multiplication
- light
- 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 orientation detection light paths of high time resolution, include mainly：Tunable quantum cascade laser controller, tunable quantum cascade laser, frequency multiplication delay circuit, light ball modulator controller, light ball modulator, macromolecule membrane sample, high-speed data acquistion system, high speed detector；Tunable quantum cascade laser light extraction under the control of tunable quantum cascade laser controller, light ball modulator controller provides original trigger signal, by obtaining the frequency multiplication trigger signal without delay after frequency multiplication delay circuit, high-speed data acquistion system controls frequency multiplication delay circuit, and the trigger signal after delay frequency multiplication is finally provided for tunable quantum cascade laser controller.The orientation detection to different-thickness, different degree of absorption samples may be implemented, evolution whole process can be orientated to sample and detected, realize the orientation detection that time resolution is 10 μ s.
Description
Technical field
Coordinating light ball modulator on-spot study material using tunable quantum cascade laser the utility model is related to a kind of
The orientation detection light path of detection technique more particularly to a kind of high time resolution that the degree of orientation develops.
Background technology
High molecular material makes them in external force field due to asymmetry extremely greatly different on its length direction and width direction
Under be easy to be arranged along external force field direction, here it is high molecular orientations.Orientation effect has been largely fixed height
Mechanical performance, optical property of molecule etc..Therefore developed many means for detecting degree of orientation, as X-ray diffraction method,
Birefringence Method, infrared dichroism spectroscopic methodology etc..Wherein, infrared dichroism spectroscopic methodology due to its can detect simultaneously crystalline region and
The degree of orientation of amorphous region strand, and it is widely used in the detection being orientated.Existing commercialized Fourier's infrared light
Spectrometer because of the weaker intensity of light source, slow change of polarized direction mode, and cannot be satisfied it to macromolecule High-speed machining mistake
The online high speed detection of evolution is orientated in journey.Meanwhile because high molecular material for the absorption of infrared light and the thickness phase of film
It closes, the weaker intensity of light source also limits it and is detected to entire Process Technology of Polymer process.
Quantum cascade laser is a kind of infrared light supply to grow up in nearest 20 years, and intensity is compared to traditional black matrix
For the infrared light supply of radiation, 4 orders of magnitude are improved, intensity is promoted to the online high speed detection macromolecular orientation degree of realization
Evolution provides the foundation.Light ball modulator is a kind of phase modulator based on photoelastic effect, be may be implemented to incident light
High-precision, the High Speed Modulation of polarization direction.Two kinds of instruments occur, and are provided for online high speed detection macromolecular orientation degree evolution
It may.But by two kinds of Instrument crosslinkings there are still two problems, first problem is, tunable quantum cascade laser arteries and veins
The modulating frequency of pulse frequency and light ball modulator under punch die formula does not match that.Another problems faced is high-speed pulse
The acquisition of signal and storage for the more demanding of software and hardware, should the integrality that preserves of signal ensure the essence of signal measurement again
Degree.
In conclusion the online orientation detection of high time resolution needs to have following characteristics：1. tunable quantum stage
The modulating frequency of the pulse needs and light ball modulator that join laser matches, i.e. pulse signal needs are fallen in modulation of polarization direction
On point, the pulsed light that polarization direction is mutually perpendicular to and is alternately present can be obtained.2. the Pulse signal acquisition system of high speed utilizes
The capture card of high sampling rate obtains accurate experimental data, and utilizes the narrow spy of the pulse width of tunable quantum cascade laser
Point, the storage of the LabVIEW process completion signals of design.It, can be with 3. by selecting the wave number of tunable quantum cascade laser
The detection that different types of sample is orientated；And set sample of the different emanated energies to different-thickness, degree of absorption
Also it can guarantee that detection obtains the signal-to-noise ratio of signal.
Scheme in the prior art is extremely difficult to above-mentioned requirements.
Utility model content
The purpose of this utility model is to provide a kind of orientation detection light path of succinct, the adjustable high time resolution of light path.
The purpose of this utility model is achieved through the following technical solutions：
The orientation detection light path of the high time resolution of the utility model includes mainly：Tunable quantum cascade laser control
Device processed, tunable quantum cascade laser, frequency multiplication delay circuit, light ball modulator controller, light ball modulator, macromolecule membrane
Sample, high-speed data acquistion system, high speed detector；
The trigger signal of the tunable quantum cascade laser controller is to the tunable quantum cascade laser, institute
It states after the optical signal that tunable quantum cascade laser is sent out passes through the light ball modulator and the macromolecule membrane sample and supports
Up to the high speed detector, the electric signal of the high speed detector to the high-speed data acquistion system, adopt by the high-speed data
The time delayed signal of collecting system is to the frequency multiplication delay circuit, and the original trigger signal of the light ball modulator controller is to described times
Frequency delay circuit and light ball modulator, trigger signal after the delay frequency multiplication of the frequency multiplication delay circuit to the tunable quantum
Cascaded laser controller.
The high time point that the utility model embodiment provides it can be seen from above-mentioned technical solution provided by the utility model
The orientation detection light path distinguished may be implemented, to the orientation detection of different-thickness, different degree of absorption samples, to be orientated sample
Evolution whole process is detected and ensures the signal-to-noise ratio of detectable signal；Certain wave can be selected for different types of sample
Number；Become the pulsed optical signals that polarization direction is mutually perpendicular to and is alternately present after ovennodulation, it is 10 μ s to realize time resolution
Orientation detection.
Description of the drawings
Fig. 1 is the structural schematic diagram of the orientation detection light path for the high time resolution that the utility model embodiment provides；
Fig. 2 is to illustrate associated with the orientation detection of high time resolution and two-way stretch device in the utility model embodiment
Figure；
Fig. 3 is the verification result schematic diagram of change of polarized direction in the utility model embodiment；
Fig. 4 a to Fig. 4 d are the orientation Evolution Data schematic diagram of stretching induction in the utility model embodiment.
In figure：
1 is tunable quantum cascade laser controller, and 2 be tunable quantum cascade laser, and 3 be times frequency delay electricity
Road, 4 be light ball modulator controller, and 5 be light ball modulator, and 6 be macromolecule membrane sample, and 7 be high-speed data acquistion system, 8
It is neutral density filters for high speed detector, 9,10 be focus lamp, and 11 be reflective mirror, and 12 be optical table, and 13 be two-way drawing
Device is stretched, 14 be optical table.
Specific implementation mode
The utility model embodiment will be described in further detail below.Do not make in the utility model embodiment in detail
The content of description belongs to the prior art well known to professional and technical personnel in the field.
The orientation detection light path of the high time resolution of the utility model, preferable specific implementation mode are：
Include mainly：Tunable quantum cascade laser controller, tunable quantum cascade laser, times frequency delay electricity
Road, light ball modulator controller, light ball modulator, macromolecule membrane sample, high-speed data acquistion system, high speed detector；
The trigger signal of the tunable quantum cascade laser controller is to the tunable quantum cascade laser, institute
It states after the optical signal that tunable quantum cascade laser is sent out passes through the light ball modulator and the macromolecule membrane sample and supports
Up to the high speed detector, the electric signal of the high speed detector to the high-speed data acquistion system, adopt by the high-speed data
The time delayed signal of collecting system is to the frequency multiplication delay circuit, and the original trigger signal of the light ball modulator controller is to described times
Frequency delay circuit and light ball modulator, trigger signal after the delay frequency multiplication of the frequency multiplication delay circuit to the tunable quantum
Cascaded laser controller.
The orientation detection experimental method of the orientation detection light path of the above-mentioned high time resolution of the utility model includes mainly：
The tunable quantum cascade laser light extraction, light under the control of tunable quantum cascade laser controller
It plays modulator control and original trigger signal is provided, by obtaining the frequency multiplication trigger signal without delay after frequency multiplication delay circuit,
The high-speed data acquistion system controls frequency multiplication delay circuit, is finally carried for tunable quantum cascade laser controller
For the trigger signal after delay frequency multiplication；
It is inclined that the tunable quantum cascade laser triggered by trigger signal goes out to project the pulse of polarization direction perpendicular to the ground
Shake light, and frequency is consistent with trigger signal, after being modulated by light ball modulator, obtains a branch of polarization direction and is mutually perpendicular to and replaces
The pulsed light of appearance, and its pulse frequency is 200kHz；
According to infrared dichroism, the orthogonal pulsed light in polarization direction, after being orientated macromolecule membrane sample, meeting
There is different degrees of absorption, transmitted through the pulsed light of sample, electric signal is converted into after high speed detector, is adopted by high-speed data
Collecting system is acquired and is stored.
Further, it by the control of tunable quantum cascade laser controller, realizes to variety classes, thickness, suction
The detection of the sample of receipts degree.By adjusting the output wave number of tunable quantum cascade laser, realize to variety classes sample
Orientation detection.By adjusting tunable quantum cascade laser Injection Current, to adjust tunable quantum cascade laser
Output power, realize the orientation detection to different-thickness, different degree of absorption sample.
Further, using frequency multiplication delay circuit, the original signal that light ball modulator controller is provided carries out at frequency multiplication
Reason controls times frequency delay electricity using the LabVIEW programs of high-speed data acquistion system by RS232 interface input time delay signal
Road, obtain doubling frequency, phase delay trigger signal.
Further, the acquisition software of high-speed data acquistion system and the tunable quantum cascade laser of setting are utilized
The storage of valid data may be implemented in pulse width.
The orientation detection experimental method of the high time resolution of the utility model.In the orientation detection light path of the high time resolution
The power bracket of tunable quantum cascade laser is 0-200mW, be may be implemented to different-thickness, different degree of absorption sample
Orientation detection can be orientated sample evolution whole process and be detected and ensure the signal-to-noise ratio of detectable signal；It is tunable simultaneously
The wave number of quantum cascade laser can be adjusted by tunable quantum cascade laser controller, for different types of sample
It can select specific wave number；Tunable quantum cascade laser is triggered by the trigger signal of 200kHz, obtains the inclined of 200kHz
Shake pulsed optical signals, becomes the pulsed optical signals that polarization direction is mutually perpendicular to and is alternately present after ovennodulation, pulse frequency is still
For 200kHz, the orientation detection that time resolution is 10 μ s is realized, which has filled up in commercialization and Laboratory Instruments
The blank of such high time resolution orientation detection.
The utility model innovative point compared with the infrared orientation detection of common fourier mainly has：
1, light path is succinct, adjustable, and infrared light incidence sample direction is adjustable, for the experiment body of incident light vertically
System and the experimental system of incident light in the horizontal direction can be applicable in.Sample space opens freely, is suitble to place all size type
Process equipment is tested, while being easy to be combined with other structures detection device.
2, the orientation detection that temporal resolution is 10 μ s may be implemented to test, for the system energy of differently- oriented directivity quick response
Enough track its Evolution.
3, it by the control of tunable quantum cascade laser controller, realizes to variety classes, thickness, degree of absorption
The detection of sample.By adjusting the output wave number of tunable quantum cascade laser, realizes and the orientation of variety classes sample is examined
It surveys.By adjusting tunable quantum cascade laser Injection Current, to adjust the output work of tunable quantum cascade laser
Rate realizes the orientation detection to different-thickness, different degree of absorption samples.
4, this patent application prospect：1) under alternating electric field, charge liquid crystal molecule differently- oriented directivity variation, rate of change and
Electric field frequency is related, and under high electric field frequency, the differently- oriented directivity rate of change of liquid crystal molecule is very fast, for detecting change in orientation
Method, it is desirable that it can match change in orientation rate, therefore the orientation detection of high time resolution will study high-frequency electrical
The orientation evolution of electrification liquid crystal molecule becomes a kind of reality off field.2) it is used to detect polymer amorphous area and is orientated the detection hand to develop
Section is limited, wherein common Fourier's infrared technique is limited the detection of crystalline orientation by change of polarized direction rate again
System can not be applied to polymer amorphous area and be orientated the on-line checking to develop, and the orientation detection of high time resolution will be examined online
It surveys polymer orientation evolution and becomes a kind of reality.3) on-line checking material can be developed into and be orientated the experiment porch to develop, it is open
Free sample operation space meets the requirement of big small-sized instrument and equipment installation and operation.
Specific embodiment, shown in d as shown in Figure 1 to Figure 4：
A kind of orientation detection light path of high time resolution includes mainly：Tunable quantum cascade laser controller 1, can
Tune quantum cascade laser 2, frequency multiplication delay circuit 3, light ball modulator controller 4, light ball modulator 5, macromolecule membrane sample
Product 6, high-speed data acquistion system 7, high speed detector 8, wherein：
Tunable quantum cascade laser light extraction under the control of tunable quantum cascade laser controller.Light ball modulator
Controller provides original trigger signal, by obtaining the frequency multiplication trigger signal without delay, high-speed data after frequency multiplication delay circuit
Acquisition system controls frequency multiplication delay circuit, after finally providing delay frequency multiplication for tunable quantum cascade laser controller
Trigger signal.The tunable quantum cascade laser triggered by trigger signal goes out to project the pulse of polarization direction perpendicular to the ground
Polarised light, frequency is consistent with trigger signal, after being modulated by light ball modulator, obtains a branch of polarization direction and is mutually perpendicular to and hands over
For the pulsed light of appearance, and its pulse frequency is 200kHz.According to infrared dichroism, the orthogonal pulse in polarization direction
Light has different degrees of absorption after being orientated macromolecule membrane sample.Transmitted through the pulsed light of sample, visited by high speed
After surveying device, it is converted into electric signal, is acquired and is stored by high-speed data acquistion system.
The device carry out high time resolution orientation detection main operational steps be：
Step (1) utilizes tunable quantum cascade laser, light ball modulator, high speed detector and necessary optics
Element (speculum, paraboloidal mirror etc.), builds orientation detection light path in vertical space, is combined with two-way stretch device；
Step (2) connects light ball modulator controller, tunable quantum cascade laser controller and delay circuit
It connects, a times frequency delay is connect with high-speed data acquistion system, and high speed detector is connect with high-speed data acquistion system；
Step (3) sets tunable quantum cascade laser output power and exports the wave number of laser, sets photoelastic tune
The modulation wave number of device processed sets the retardation of frequency multiplication delay circuit；
The vertical light path built under step (4), polarization optics guidance, two polarization direction are respectively parallel to double machine drawings and draw
The both direction stretched.Whether the direction that following procedure is used to verify polarised light is respectively parallel to the both direction that double machine drawings stretch.
The direction of analyzer is set in the direction for being parallel to the stretching of first step machine, if the signal of pulsed light halves, it was demonstrated that obtain
It is parallel to the polarised light of first step machine stretching；Polariscope direction is rotated by 90 °, if the signal of pulsed light halves, it was demonstrated that obtain
It is parallel to the polarised light of second step machine stretching.
Step (5), clamping macromolecule membrane sample；
Step (6), setting macromolecule membrane sample draft temperature, extensograph parameter wait for that macromolecule membrane sample reaches setting
When temperature, control high-precision servo motor starts continuous rotation, is stretched under the stretch mode of setting；
In step (7), drawing process, high speed detector direct impulse optical signal is simultaneously acquired and is deposited using high speed acquisition system
Store up data.By degree of orientation of the research under differently strained, the relationship between research strain and orientation.
Experiment embodiment：
β-pp of the high time resolution orientation detection light path for biaxial tension is orientated detection of developing.
Experiment purpose：
It is limited for detecting the detection means that polymer amorphous area orientation develops, wherein common Fourier's infrared technique pair
It is limited again by change of polarized direction rate in the detection of crystalline orientation, polymer amorphous area can not be applied to and be orientated evolution
On-line checking develops the orientation detection of high time resolution for on-line checking polymer orientation.It is orientated journey by observation
Degree understands effect of the process for polymer amorphous region induced orientation with the change of strain, regulates and controls polymer for guidance
It is orientated and scientific basis is provided.
Experimentation：
Select the β-PP of curtain coating as experiment material, according to its infrared spectrum, the wave for selecting 973cm-1 to be measured as this
Number, is set as 973cm-1, the modulation of light ball modulator by the work wave number of tunable quantum cascade laser and light ball modulator
Retardation is set as λ/2.It is required according to the size of biaxial tension machine, β-PP is cut into the shape of 13cm*13cm.Setting is drawn
It is 130 DEG C to stretch temperature, and elongation strain is set as 2 × 2.High-speed data acquistion system is opened, data acquisition, which is set as signal, touches
Retain 25 data points after hair, while being set in the duty ratio for exporting pulse by tunable quantum cascade laser controller
2.4%.When reaching draft temperature, start to stretch, synchronous acquisition infrared signal.By the pulse signal of acquisition import in MATLAB into
Row processing, obtains the peak position value of each pulse, using infrared dichroism, calculates the result of orientation.
Experiment conclusion：
When Fig. 4 a and Fig. 4 c are respectively that the first step stretches (along the directions MD) and second step stretching (along the directions TD), the side MD
To the peak strength variation with transmitted light on the directions TD.It can be seen that, the peak strength on the directions MD is removed at the beginning in Fig. 4 a
Other than a bit of rising, subsequent peak strength has reached a platform；Peak strength on the directions TD then monotone increasing always.
It can be seen that, the peak strength on the directions MD rises always in Fig. 4 c；Peak strength on the directions TD then monotone decreasing always.Thoroughly
It is related to the thickness of sample and the degree of orientation of middle strand of sample to penetrate the peak strength of light.In first step drawing process
In, as strain changes more significant change occurs for film thickness, absorbs and weakens caused by this variation, transmitted intensity
Rise；Meanwhile strand is arranged along the directions MD, and the absorption in the directions MD is caused to increase, the absorption in the directions TD weakens；Therefore, exist
In first step drawing process, the peak strength on the directions MD does not significantly rise, caused by reason is that film thickness weakens
Absorbing reduces cancelling out each other between strand influx and translocation caused by the directions MD；And the rising of intensity is on the directions TD
Thickness absorbs the result for absorbing and reducing caused by reducing the directions TD vertical with strand caused by weakening.Second step drawing process
In, film thickness does not have a significant change, and Change of absorption accounts for leading role caused by molecular chain orientation.Strand is drawn in second step
In stretching, the directions TD are rotated to from the directions MD, the peak strength resulted on the directions MD rises always；Peak strength on the directions TD
Then successively decrease always.
From the result of calculation of orientation, molecular chain orientation is stretched with the first step first, is arranged, is taken along the directions MD
0.36 is risen to the factor from 0.04；And after second step stretching, and 0 is returned to from 0.36, become isotropic state, with
Report in pertinent literature is consistent.
Although the illustrative specific implementation mode of utility model is described above, in order to the skill of the art
Art personnel understand the utility model, it is to be understood that the utility model is not limited to the range of specific implementation mode.This technology is led
For the those of ordinary skill in domain, as long as various change is in the spirit of the utility model that the attached claims limit and determine
In range, these variations are it will be apparent that all are created using the utility model of the utility model design in protection
Row.
The preferable specific implementation mode of the above, only the utility model, but the scope of protection of the utility model is not
It is confined to this, any one skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should
Subject to the scope of protection of the claims.
Claims (1)
1. a kind of orientation detection light path of high time resolution, which is characterized in that include mainly：Tunable quantum cascade laser control
Device (1) processed, tunable quantum cascade laser (2), frequency multiplication delay circuit (3), light ball modulator controller (4), photoelastic modulation
Device (5), macromolecule membrane sample (6), high-speed data acquistion system (7), high speed detector (8)；
The trigger signal of the tunable quantum cascade laser controller (1) to the tunable quantum cascade laser (2),
The optical signal that the tunable quantum cascade laser (2) sends out passes through the light ball modulator (5) and the macromolecule membrane
Sample (6) arrives at the high speed detector (8) afterwards, the electric signal of the high speed detector (8) to the high-speed data acquisition system
It unites (7), the time delayed signal of the high-speed data acquistion system (7) to the frequency multiplication delay circuit (3), the light ball modulator control
The original trigger signal of device (4) processed is to the frequency multiplication delay circuit (3) and light ball modulator (5), the frequency multiplication delay circuit (3)
Delay frequency multiplication after trigger signal to the tunable quantum cascade laser controller (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820476730.2U CN208013076U (en) | 2018-04-04 | 2018-04-04 | The orientation detection light path of high time resolution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820476730.2U CN208013076U (en) | 2018-04-04 | 2018-04-04 | The orientation detection light path of high time resolution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208013076U true CN208013076U (en) | 2018-10-26 |
Family
ID=63892175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820476730.2U Active CN208013076U (en) | 2018-04-04 | 2018-04-04 | The orientation detection light path of high time resolution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208013076U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240975A (en) * | 2018-04-04 | 2018-07-03 | 中国科学技术大学 | The orientation detection light path and experimental method of high time resolution |
-
2018
- 2018-04-04 CN CN201820476730.2U patent/CN208013076U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240975A (en) * | 2018-04-04 | 2018-07-03 | 中国科学技术大学 | The orientation detection light path and experimental method of high time resolution |
| CN108240975B (en) * | 2018-04-04 | 2024-03-29 | 中国科学技术大学 | High-time-resolution orientation detection light path and experimental method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105841816B (en) | Terahertz time-domain spectroscopy system | |
| CN105628642A (en) | Method for improving frequency spectrum signal-to-noise ratio of tera-hertz optical detection system | |
| CN103344623B (en) | One carries high-precision coherent anti-stokes raman scattering light comb optical spectrum detecting method | |
| CN102937573B (en) | Z-scan optical nonlinear measuring device and method | |
| CN102426058B (en) | Static interference imaging polarizer and method for acquiring polarization information of target | |
| CN103033488B (en) | Z scanning optical nonlinear measurement device and method capable of observing and monitoring in real time | |
| CN105891144A (en) | Terahertz scanning system and method | |
| CN105699297B (en) | A kind of single-shot time material light Kerr coefficient measuring device | |
| Trifonov et al. | Broadband femtosecond circular dichroism spectrometer with white-light polarization control | |
| CN105699317A (en) | Terahertz time-domain spectrograph capable of entering at fixed angle and simultaneously detecting transmission and reflection | |
| CN103487146A (en) | Ultra wide band stimulated raman spectroscopy microscopic imaging system simple and convenient to use | |
| CN104121995A (en) | Device and method for measuring time-domain width of femtosecond pulse | |
| CN103529296B (en) | A kind of device and method for measuring comb spectrum generator phase spectrum | |
| CN107063456A (en) | Time resolution diffraction efficiency of grating spectral measurement device in situ and method | |
| CN208013076U (en) | The orientation detection light path of high time resolution | |
| CN107655832B (en) | Based on the femtosecond Two-dimensional spectroscopy acquisition method converted in chirp and system | |
| CN106647096B (en) | A kind of the femtosecond light Kerr-gate and its implementation of biswitch pulse | |
| CN108593563A (en) | Optical material test method and optic analytical instrument used | |
| CN105181155A (en) | Terahertz pulse single-time detection system and detection method based on single-mode fiber | |
| CN110146410A (en) | The measuring device and method of atomic density and i on population based on differential absorption method | |
| CN105953929A (en) | Single-pulse width and energy measurement device | |
| CN104075875B (en) | Measuring device and measuring method for measuring delay characteristic of micro-nano components | |
| CN107843564A (en) | Reflection type optical material nonlinear polarization spectrum measuring device | |
| CN101799332B (en) | Ultra-short pulse diagnostic method based on molecular arrangement and orientation | |
| CN107478604A (en) | The measurement apparatus and measuring method of refractive index of transparent materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |