CN109632729A - Ultrafast continuous imaging method based on wavelength optical spectroscopy - Google Patents
Ultrafast continuous imaging method based on wavelength optical spectroscopy Download PDFInfo
- Publication number
- CN109632729A CN109632729A CN201910047774.2A CN201910047774A CN109632729A CN 109632729 A CN109632729 A CN 109632729A CN 201910047774 A CN201910047774 A CN 201910047774A CN 109632729 A CN109632729 A CN 109632729A
- Authority
- CN
- China
- Prior art keywords
- subpulse
- wavelength
- ultrafast
- pump light
- pulse
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The ultrafast continuous imaging method based on wavelength optical spectroscopy that the present invention relates to a kind of, belongs to ultrafast imaging field.The laser pulse that laser issues is divided into several beam subpulses and a branch of pump light by the present invention, is adjusted the wavelength of subpulse and is all different with the wavelength for ensuring every beam subpulse；Every beam subpulse has certain intervals in time, i.e., has different time delays between every beam subpulse and pump light；Pump light excites article to be measured, the continuous impulse sequence acquisition that multi beam subpulse is formed, which is excited after the information of sample, is reduced into several beam subpulses according to wavelength, every beam subpulse is imaged after being collected respectively, can realize the ultrafast continuous imaging to a ultrafast process.The present invention only needs to carry out a test, as soon as being divided into a pumping pulse and several detection subpulses with different time delay using a pulse, can obtain the image information of ultrafast process several different moments.
Description
Technical field
The ultrafast continuous imaging method based on wavelength optical spectroscopy that the present invention relates to a kind of, belongs to ultrafast imaging field.
Background technique
Ultrafast imaging is the effective technology for studying ultrafast process, such as plasma physics, ultrafast chemistry, ultrafast biology
Deng.The observation of these ultrafast process is particularly significant to the essence of these ultrafast process of correct understanding.When ultrafast laser has lasting
Between short, feature that peak power is high, huge have very strong excitation, regulation and a detectivity, thus ultrafast chemistry, ultrafast biology with
And there is important application in the fields such as ultrafast laser manufacture.
The imaging of high time resolution may be implemented using the ultrashort pulse of femtosecond laser for traditional ultrafast imaging technique.But
It completes to need to be repeated several times this process to the complete observation of a ultrafast process and different moments in the process is shot
Then complete procedural information is pieced together out.There is apparent defect in principle in this method.Firstly, this method requires every time in fact
The height for testing condition is consistent；Secondly, this method to be difficult to reproduction process, contingency procedure have limitation.And femtosecond laser is processed
The ultrafast evolutionary process of middle electronic Dynamic is extremely sensitive to experiment condition, belongs to difficult repetitive process, and the high signal-to-noise ratio of demand and height
Spatial and temporal resolution.Therefore it needs to propose a kind of ultrafast continuous imaging method that can carry out ultrafast process high time resolution.
Traditional continuous imaging device relies on mechanical equipment, and the limitation of mechanical device response time seriously constrains continuously
The time precision of imaging device, highest temporal resolution are usually musec order.Another kind using ultrafast electronic shutter at
The response speed of circuit is depended primarily on to nanosecond rank as the temporal resolution of device can be improved, therefore temporal resolution
Being difficult to further promotion, it is expensive.Above-mentioned two clock method is unable to satisfy our demands to ultrafast process detection.
Structure is complicated for the ultrafast continuous imaging method system that Japanese seminar proposes, due to the phase between different frequency spectrum
Mutually interference, leads to its time limited resolution, and the smallest temporal resolution is 100fs or so.And shoot frame number and each frame
Time for exposure be limited by the width of pulse delay, influence each other, the detection process of ultrafast phenomena will be impacted, Wu Fa
It is accurately shot in the shooting long period.The scheme that domestic seminar proposes cannot achieve to the shooting during ultrafast be continuously shot
Time interval between frame number and each frame is freely adjusted.Therefore, currently there is an urgent need to propose that one kind had both met superelevation space-time
Differentiate the ultrafast continuous imaging method for being able to satisfy again and facilitating and adjusting shooting frame number and shooting interval requirement.
Summary of the invention
It cannot achieve that disposable to obtain ultrafast process continuous the purpose of the present invention is to solve existing ultrafast imaging technique
Information, imaging spatial and temporal resolution are low, it is difficult to meet the problem of scientific research needs, provide a kind of ultrafast continuous based on wavelength optical spectroscopy
Imaging method, this method is by using wavelength light-splitting method, when can realize in primary test to ultrafast process progress femtosecond
Between the continuous imaging that is spaced, and the delay between direct impulse sequence can be accurately controlled, to lead for ultrafast continuous imaging
The research in domain provides means and tool.
The working principle of the invention and technical solution are as follows:
The laser pulse that laser issues is divided into several beam arteries and veins by the ultrafast continuous imaging method based on wavelength optical spectroscopy
Punching and a branch of pump light, are adjusted the wavelength of subpulse and are all different with the wavelength for ensuring every beam subpulse；Every beam subpulse when
Between it is upper there are certain intervals, i.e., there are different time delays between every beam subpulse and pump light；Pump light excites determinand
Product, the continuous impulse sequence acquisition that multi beam subpulse is formed, which is excited after the information of sample, is reduced into several Shu Zi according to wavelength
Pulse, every beam subpulse are imaged after being collected respectively, can realize the ultrafast continuous imaging to a ultrafast process.
The time delays are incremented by successively, convenient for the processing of picture sequence；
Realize the device of the above method, comprising: be commonly divided microscope group, laser, wavelength modulator group, delay line group, anti-
Penetrate mirror, dichroic microscope group and CCD imaging system group.
The laser pulse that laser issues is divided into several beam subpulses and a branch of pump light using common light splitting microscope group, son
Pulse is successively processed into the subpulse with time delay after respective wavelength modulator, delay line and dichroscope,
Time delay between each subpulse is mutually indepedent；Pump light is reflected by a reflector on sample；Each subpulse is at the last one
After dichroscope realizes that beam is closed in space, the pulse train with certain time delay is formed, pulse train irradiation sample is excited
Region simultaneously carries and is reduced into several beam subpulses by dichroic microscope group according to wavelength after sample message, every beam subpulse respectively by
It is imaged after the acquisition of CCD imaging system, that is, realizes ultrafast continuous imaging；
Beneficial effect
The present invention only needs to carry out a test, and being divided into a pumping pulse and several using a pulse has difference
The detection subpulse of time delays, can obtain the image information of ultrafast process several different moments.The present invention not only subtracts significantly
Lack the workload for needing to be repeated several times test originally, significantly improves scientific research efficiency, and observed result can be improved from principle
Accuracy (eliminating the repetitive error in conventional method), expand the scope of application of this method (to not reproducible and difficult repetition
Process is equally applicable).Meanwhile expansibility of the present invention is strong, can be adjusted according to the needs direct impulse sequence number, and respectively visit
It surveys delay control between pulse and independently of each other, facilitates adjusting.
Detailed description of the invention
Fig. 1 is the optical principle schematic diagram of a three pulse detection SEQUENCE Examples of the invention patent.
Wherein, 1-commonly it is divided microscope group, 2-lasers, 3-wavelength modulator groups, 4-delay line groups, 5-reflecting mirrors,
6-dichroic microscope groups, 7-CCD imaging system groups, 8-samples.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
Embodiment 1
The laser pulse that laser issues is divided into several beam arteries and veins by the ultrafast continuous imaging method based on wavelength optical spectroscopy
Punching and a branch of pump light, are adjusted the wavelength of subpulse and are all different with the wavelength for ensuring every beam subpulse；Every beam subpulse when
Between it is upper there are certain intervals, i.e., there are different time delays between every beam subpulse and pump light；Pump light excites determinand
Product, the continuous impulse sequence acquisition that multi beam subpulse is formed, which is excited after sample message, is reduced into several beam arteries and veins according to wavelength
Punching, every beam subpulse are imaged after being collected respectively, can realize ultrafast continuous imaging；
The time delays are incremented by successively, convenient for the processing of picture sequence；
Realize the device of the above method, comprising: be commonly divided microscope group, laser, wavelength modulator group, delay line group, anti-
Penetrate mirror, dichroic microscope group and CCD imaging system group.
Common light splitting microscope group includes 3 common spectroscopes；Wavelength modulator group includes 3 wavelength modulators；Delay line group
Include 3 delay lines；Dichroic microscope group includes 6 dichroic microscope groups；CCD imaging system group includes 3 CCD imaging systems.
By adjusting the light path of each subpulse, the position of mobile corresponding delay line makes three between subpulse and pump light
It is respectively separated 1 nanosecond, 2 nanoseconds and 3 nanoseconds.
Ultrafast continuous imaging implementation steps based on wavelength optical spectroscopy are as follows:
(1) optical path is built according to traditional pumping detecting method.Pump light and detection light are generated by laser 2.
(2) it based on (1), in detection light optical path, is divided into two bundles with common spectroscope 1 by light is detected.It is wherein a branch of
Change its wavelength using wavelength modulator 3 after being reflected by spectroscope, and its delay is adjusted by delay line 4, then projects two
To in Look mirror 6, a branch of direct impulse is obtained.The effect of dichroscope herein is the detection light filtered outside a wavelength range.In addition
It is a branch of to be projected on the common spectroscope of the latter through spectroscope, to establish next sub- detection optical path.
(3) (2) are repeated, establishes three son detection optical paths, obtain three pulse detection sequences, the mutual not phase of each subpulse wavelength
Together.
(4) light beam that last height detects the mirror transmission that is split in optical path is reflected into sample through reflecting mirror 5 as pump light
8 surface of product.
(5) all direct impulses are finally closed on beam to same optical path by the dichroscope in optical path where it, final to throw
It is mapped to sample surfaces.
(6) all direct impulses, according to the foundation sequence of each pulse, successively place each wavelength through after sample in optical path
The corresponding dichroscope of optical path where pulse carries out Wavelength demodulation to pulse train, so that each direct impulse is by wavelength in space
On be distinguished.The effect of dichroscope herein is to screen the direct impulse of particular range of wavelengths.
(7) after dichroscope spatially distinguishes direct impulse, on each sub-light road place a CCD at
As system 7, the son detection light of different wave length is imaged respectively.
(8) image information in all CCD imaging systems is transmitted to computer, by that can be redeveloped into after computer disposal
Continuous dynamic image.Three images respectively correspond 1 nanosecond after sample is excited, the dynamic of 2 nanoseconds and 3 moment nanosecond.
Although explanation is introduced by taking the detection device of three pulse detection sequences as an example here, the invention patent is unlimited
In 3 pulse trains, 4 pulses, 5 pulses, 6 pulses etc. detection sequence also can get using method of the invention.The present invention is in original
Any number of pulse detection sequence may be implemented in reason.Above-described specific descriptions, to the purpose of invention, technical solution and
Beneficial effect has been further described, it should be understood that the above is only a specific embodiment of the present invention,
It is not intended to limit the scope of protection of the present invention, all within the spirits and principles of the present invention, any modification for being made equally is replaced
It changes, improve, should all be included in the protection scope of the present invention.
Above-described specific descriptions have carried out further specifically the purpose of invention, technical scheme and beneficial effects
It is bright, it should be understood that the above is only a specific embodiment of the present invention, the protection model being not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (3)
1. the ultrafast continuous imaging method based on wavelength optical spectroscopy, it is characterised in that: the laser pulse that laser issues to be divided into
Several beam subpulses and a branch of pump light are adjusted the wavelength of subpulse and are all different with the wavelength for ensuring every beam subpulse；Every beam
Subpulse has certain intervals in time, i.e., has different time delays between every beam subpulse and pump light；Pump light
Excite article to be measured, the continuous impulse sequence acquisition that multi beam subpulse is formed is excited after the information of sample and is reduced according to wavelength
At several beam subpulses, every beam subpulse is imaged after being collected respectively, can realize to the ultrafast continuous of ultrafast process
Imaging.
2. the ultrafast continuous imaging method based on wavelength optical spectroscopy as described in claim 1, it is characterised in that: the time delays
It is incremented by successively, convenient for the processing of picture sequence.
3. realizing the device of the above method, it is characterised in that: include: common light splitting microscope group, laser, wavelength modulator group, prolong
Slow line group, reflecting mirror, dichroic microscope group and CCD imaging system group；
The laser pulse that laser issues is divided into several beam subpulses and a branch of pump light, subpulse using common light splitting microscope group
The subpulse with time delay, each son are successively processed into after respective wavelength modulator, delay line and dichroscope
Time delay between pulse is mutually indepedent；Pump light is reflected by a reflector on sample；Each subpulse the last one two to
After Look mirror realizes that beam is closed in space, the pulse train with certain time delay is formed, pulse train irradiation sample is excited region
And carry and several beam subpulses be reduced by dichroic microscope group according to wavelength after sample message, every beam subpulse respectively by CCD at
As being imaged after system acquisition, that is, realize ultrafast continuous imaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910047774.2A CN109632729A (en) | 2019-01-18 | 2019-01-18 | Ultrafast continuous imaging method based on wavelength optical spectroscopy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910047774.2A CN109632729A (en) | 2019-01-18 | 2019-01-18 | Ultrafast continuous imaging method based on wavelength optical spectroscopy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109632729A true CN109632729A (en) | 2019-04-16 |
Family
ID=66061259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910047774.2A Pending CN109632729A (en) | 2019-01-18 | 2019-01-18 | Ultrafast continuous imaging method based on wavelength optical spectroscopy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109632729A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834057A (en) * | 2020-12-30 | 2021-05-25 | 中国科学院西安光学精密机械研究所 | Multi-window pulse measuring device and method |
| CN112894149A (en) * | 2021-01-21 | 2021-06-04 | 北京理工大学 | Ultrafast continuous three-dimensional imaging system and method for ablating object by ultrashort pulse laser |
| CN114486687A (en) * | 2022-01-27 | 2022-05-13 | 北京理工大学 | Multi-scale continuous observation feedback method and device for femtosecond laser processing cells |
| CN114928699A (en) * | 2022-04-28 | 2022-08-19 | 中山大学 | Ultrafast imaging method based on color digital camera |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673721A (en) * | 2004-03-26 | 2005-09-28 | 华东师范大学 | Collinear time resolution sagnac interferometer |
| CN1945342A (en) * | 2006-09-15 | 2007-04-11 | 江苏大学 | Detecting method and its device for double light beam-two angle super short pulse laser pumping |
| CN103091255A (en) * | 2013-01-15 | 2013-05-08 | 首都师范大学 | Terahertz time-space resolution imaging system, imaging method and application thereof |
-
2019
- 2019-01-18 CN CN201910047774.2A patent/CN109632729A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673721A (en) * | 2004-03-26 | 2005-09-28 | 华东师范大学 | Collinear time resolution sagnac interferometer |
| CN1945342A (en) * | 2006-09-15 | 2007-04-11 | 江苏大学 | Detecting method and its device for double light beam-two angle super short pulse laser pumping |
| CN103091255A (en) * | 2013-01-15 | 2013-05-08 | 首都师范大学 | Terahertz time-space resolution imaging system, imaging method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 余彦武: "飞秒激光加工中电子状态的观测与调控", 《中国博士学位论文全文数据库工程科技I辑》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834057A (en) * | 2020-12-30 | 2021-05-25 | 中国科学院西安光学精密机械研究所 | Multi-window pulse measuring device and method |
| CN112834057B (en) * | 2020-12-30 | 2022-05-20 | 中国科学院西安光学精密机械研究所 | Multi-window pulse measuring device and method |
| CN112894149A (en) * | 2021-01-21 | 2021-06-04 | 北京理工大学 | Ultrafast continuous three-dimensional imaging system and method for ablating object by ultrashort pulse laser |
| CN112894149B (en) * | 2021-01-21 | 2021-11-30 | 北京理工大学 | Ultrafast continuous three-dimensional imaging system and method for ablating object by ultrashort pulse laser |
| US11313971B1 (en) | 2021-01-21 | 2022-04-26 | Beijing Institute Of Technology | Three-dimensional imaging system and method |
| CN114486687A (en) * | 2022-01-27 | 2022-05-13 | 北京理工大学 | Multi-scale continuous observation feedback method and device for femtosecond laser processing cells |
| CN114486687B (en) * | 2022-01-27 | 2023-09-15 | 北京理工大学 | Multi-scale continuous observation feedback method and device for femtosecond laser processing cells |
| CN114928699A (en) * | 2022-04-28 | 2022-08-19 | 中山大学 | Ultrafast imaging method based on color digital camera |
| CN114928699B (en) * | 2022-04-28 | 2023-08-01 | 中山大学 | Ultra-fast imaging method based on color digital camera |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109632729A (en) | Ultrafast continuous imaging method based on wavelength optical spectroscopy | |
| CN110567595B (en) | Real-time measurement method and system for transient ultrashort pulse time width | |
| CN104375374B (en) | Ultra-fast laser continuous imaging device and method based on frequency domain space-time transformation | |
| Lin et al. | Fourier analysis on transient imaging with a multifrequency time-of-flight camera | |
| Yang et al. | Hyperspectrally compressed ultrafast photography | |
| CN111537477B (en) | Ultrafast time resolution and low excitation threshold multi-photon fluorescence microscopic imaging system | |
| Chen et al. | Modulated CMOS camera for fluorescence lifetime microscopy | |
| JP7287961B2 (en) | System, apparatus and method for simultaneous multi-plane imaging | |
| CN107843560B (en) | High-spatial-resolution pumping-detection micro-area measuring device, system and method | |
| CN103487421B (en) | Time gate wide field stimulated radiation super-resolution microscopic method and device | |
| CN104697649B (en) | Single-shot laser pulse detection device | |
| CN107478630B (en) | Device and method for improving single-molecule optical imaging contrast | |
| CN105424189A (en) | Scanning type multifunctional microscopic-spectral imaging method | |
| CN108885138A (en) | The measuring method for waveform and waveform meter of pulsed light | |
| EP3088869B1 (en) | Multi-cell apparatus and method for single ion addressing | |
| CN106646510A (en) | Photon marking based first photon laser imaging system | |
| CN110440918A (en) | A kind of high-resolution chevilled silk fluorescence spectrum imaging in space and localization method and system | |
| Yeola et al. | Single-shot ultrafast imaging via spatiotemporal division of femtosecond laser pulses | |
| CN109540304A (en) | A kind of ultrashort laser pulse measuring device based on frequency resolved optical gating | |
| CN109632113A (en) | Contrast single-shot measuring device | |
| JP2013117529A (en) | Method and apparatus for inspecting sample | |
| CN106644408B (en) | Device and method for measuring time resolution of synchronous scanning stripe camera | |
| CN111239090A (en) | Method and system for measuring single-pulse laser-induced transient molecular fluorescence spectrum | |
| Diels et al. | Ultrafast diagnostics | |
| CN107643272A (en) | A kind of time-resolved fluorescence measuring system based on few passage TCSPC and multi-detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190416 |