CN100392366C - Measuring method and measuring device for time resolution spectrum - Google Patents
Measuring method and measuring device for time resolution spectrum Download PDFInfo
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- CN100392366C CN100392366C CNB2004100738394A CN200410073839A CN100392366C CN 100392366 C CN100392366 C CN 100392366C CN B2004100738394 A CNB2004100738394 A CN B2004100738394A CN 200410073839 A CN200410073839 A CN 200410073839A CN 100392366 C CN100392366 C CN 100392366C
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- resolved spectroscopy
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Abstract
The present invention provides a new method and a new measurement device for measuring a time resolution spectrum, which is concurrent at time. After a light signal is converted into an electric signal by a photomultiplier tube through the light splitting of a monochromator, an attenuation curve I (lambda<j>, t) on the wavelength of the electric signal can be conveniently recorded by a digital storage oscilloscope. After attenuation curves under different wavelengths are orderly recorded, data of the attenuation curves are processed, luminescence intensity under the different wavelengths at the same attenuation time is taken out and thus a time resolution spectrum can be obtained. The method of the present invention is characterized in that measurement is concurrently carried out at time. Thus, the method is convenient and fast, measurement time is greatly shortened and measurement efficiency is enhanced. Because the digital oscilloscope is a universal laboratory device, existent devices can be fully used for measuring, which is favorable to reducing cost.
Description
Technical field
The present invention relates to a kind of method of measure spectrum, particularly, relate to a kind of method of Measuring Time resolved spectroscopy, simultaneously, the invention still further relates to the measurement mechanism of Measuring Time resolved spectroscopy.
Background technology
The luminous intensity of luminescent material behind short pulse excitation is the function of wavelength and time, measure transient process and in fact be exactly measurement as the binary function luminous intensity I of wavelength and time (λ, t).Understanding and study this transient process can be by measuring fixed wave length λ
iLuminous intensity I (λ over time
i, t) or measure fixed delay time t
jSpectrum I (λ, t
j) reach.I (λ
i, t) be called die-away curve, I (λ, t
j) be called time resolved spectroscopy.
The generation of elementary excitation, motion and interaction have caused all physical processes in the material, for example radiation transistion, radiationless transition, the transmission that excites and transport, and these processes correspondingly are reflected in the dynamic process of the energy distribution of excited state and decay thereof.Time resolved spectroscopy is the physical process in these problems of research and then the understanding material, explores the important experimental technique of new material.Time resolved spectroscopy is a basic fundamental of the various photoelectric functional material excited state processes of research, is absolutely necessary in the scientific research in this field.
In order to obtain the concrete form of this binary function, can adopt different measuring methods.That generally adopts at present, has two kinds of measuring techniques:
The one, Boxcar is a Sampling Integral Technology, and after the luminous signal after pulsed light excites was received by photomultiplier, through an electronic switch, the moment that this switch is opened (excited back t
j) and the duration (t that opens
p) controlled.Like this, has only t in the luminous signal
jConstantly that part of can enter integrator by switch and average.If fixed delay time t
j, and spectrometer scanning just can obtain spectrum I (λ, t
j), promptly excite back t
jTime resolved spectroscopy constantly.Since this method in time with frequency on all serial carry out, the luminous I after at every turn exciting (λ, t) in, t is only arranged
jNear t
pIn and the signal in the spectral range that determined of spectrometer wavelength position and resolution be utilized, so the signal utilization factor is low, it is longer to measure required time.
Another kind is to use detector array, and as ccd detector, microchannel plate (MCP) etc., this is a kind of method parallel on wavelength, and after the spectrometer chromatic dispersion, wavelength optical signals enters the different pixels of detector.Detector can be surveyed and divide spectrum to product of events, also can use the method for sampling, measures the light intensity of certain moment all wavelengths after exciting, and obtains time resolved spectroscopy.Walk abreast on wavelength owing to measure, so the signal utilization factor improves greatly.The sensitivity of CCD and response time all are lower than photomultiplier, generally only are used to measure the spectrum to time integral.Though and microchannel plate can excite the distribution of acquisition luminous intensity on wavelength and time both direction down at monopulse in principle, because the system cost costliness is used very not general.
Summary of the invention
Technical matters to be solved by this invention is that the signal utilization factor that overcomes the prior art existence is low, the measurement required time is longer.The measuring method and the measurement mechanism of the last Measuring Time resolved spectroscopy that walks abreast of a kind of time are proposed.
A kind of measuring method of time resolved spectroscopy is characterized in that may further comprise the steps:
(1) with monochromator light signal is carried out frequency-selecting, obtain the attenuate light signal under the specific wavelength in the predetermined wavelength range;
(2) convert this light signal to electric signal with photomultiplier;
(3) note this electric signal with digital storage oscilloscope, obtain the die-away curve under this specific wavelength;
(4) output wavelength of control break monochromator obtains die-away curve under other wavelength via above-mentioned steps (1) to (3);
Repeating step above-mentioned (1) is to (4), and the die-away curve of all wavelengths in obtaining described predetermined wavelength range carries out data conversion then, and the luminous intensity of taking out each wavelength under the same attenuation initiation obtains time resolved spectroscopy.
The measuring method of time resolved spectroscopy also comprises with the short pulse excitation sample of the light-pulse generator or the pulse power obtaining described light signal.
The measuring method of time resolved spectroscopy, described control are to utilize computing machine to carry out.
The measuring method of time resolved spectroscopy, described data conversion are to utilize computing machine to carry out.
The measurement mechanism of time resolved spectroscopy, this device comprises: monochromator, photomultiplier and digital oscilloscope, light signal are gone into the photoelectricity multiplier tube and are converted electric signal to through the monochromator frequency-selecting is laggard, and this electric signal carries out record by digital oscilloscope again.
This device also comprises impulse source, can be the pulse power or light-pulse generator, is used for that sample is carried out short pulse excitation and obtains light signal.
This device also comprises computing machine, is used for monochromator is carried out wavelength control.
This device also comprises computing machine, is used to carry out data conversion.
The invention has the beneficial effects as follows, measure parallel carrying out because the time goes up, therefore convenient and swift than the Boxcar technology, shorten Measuring Time greatly, improve efficiency of measurement; Lower than detector array cost, because digital oscilloscope is more general laboratory equipment, may makes full use of existing device and measure.
Description of drawings
The measurement mechanism block scheme of Fig. 1 time resolved spectroscopy.
Among the figure: heavy line is represented light signal, and fine line is represented electric signal, and dotted line is represented light or electric excitation signal.
Die-away curve under a series of wavelength that Fig. 2 measures in er-doped ZBLAN glass sample.
Fig. 3 carries out data conversion to die-away curve among Fig. 2, takes out under the same attenuation initiation, and the luminous intensity of each wavelength, drafting pattern obtains time resolved spectroscopy figure.
Embodiment
Shown in Figure 1 as concrete enforcement block scheme, excite down at Nd:YAG frequency tripling 355nm wavelength pulse light source short pulse δ (t), the luminescent spectrum of er-doped ZBLAN glass sample changes and decay fast, and this is luminous through after the monochromator frequency-selecting, obtains the attenuate light signal I (λ under certain specific wavelength
i, t), change electric attenuation signal F (λ into through photomultiplier again
i, t),, so just obtain the die-away curve F (λ under this wavelength at last by the digital oscilloscope record
i, t).After these die-away curve data were transferred to computing machine, computer control changed the monochromator output wavelength, and system carries out new die-away curve measurement then.Die-away curve under a series of wavelength that Fig. 2 measures in er-doped ZBLAN glass sample.By computing machine these die-away curves are carried out data conversion, take out under certain same attenuation initiation, the luminous intensity of each wavelength, drafting pattern promptly obtains time resolved spectroscopy figure, as Fig. 3.
Claims (7)
1. the measuring method of a time resolved spectroscopy is characterized in that may further comprise the steps:
(1) with monochromator light signal is carried out frequency-selecting, obtain the attenuate light signal under the specific wavelength in the predetermined wavelength range;
(2) with photomultiplier the attenuate light conversion of signals under this wavelength is become electric signal;
(3) note this electric signal with digital storage oscilloscope, obtain the die-away curve under this specific wavelength;
(4) output wavelength of control break monochromator obtains die-away curve under other wavelength via above-mentioned steps (1) to (3);
Repeating step above-mentioned (1) is to (4), and the die-away curve of all wavelengths in obtaining described predetermined wavelength range carries out data conversion then, and the luminous intensity of taking out each wavelength under the same attenuation initiation obtains time resolved spectroscopy.
2. the measuring method of time resolved spectroscopy as claimed in claim 1 is characterized in that also comprising with the short pulse excitation sample of the light-pulse generator or the pulse power obtaining described light signal.
3. the measuring method of time resolved spectroscopy as claimed in claim 1 or 2 is characterized in that described control utilizes computing machine to carry out.
4. the measuring method of time resolved spectroscopy as claimed in claim 1 or 2 is characterized in that described data conversion utilizes computing machine to carry out.
5. the measuring method of time resolved spectroscopy as claimed in claim 3 is characterized in that described data conversion utilizes computing machine to carry out.
6. the measurement mechanism of a time resolved spectroscopy is characterized in that comprising: monochromator, and photomultiplier and digital oscilloscope, light signal are gone into the photoelectricity multiplier tube and are converted electric signal to through the monochromator frequency-selecting is laggard, and this electric signal carries out record by digital oscilloscope again; Also comprise computing machine, monochromator is carried out wavelength control; The data that digital oscilloscope transmits are carried out data conversion.
7. the measurement mechanism of a kind of time resolved spectroscopy as claimed in claim 6 is characterized in that also comprising impulse source, is used for that sample is carried out short pulse excitation and obtains light signal.
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| CNB2004100738394A CN100392366C (en) | 2004-09-06 | 2004-09-06 | Measuring method and measuring device for time resolution spectrum |
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| CNB2004100738394A CN100392366C (en) | 2004-09-06 | 2004-09-06 | Measuring method and measuring device for time resolution spectrum |
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| CN100392366C true CN100392366C (en) | 2008-06-04 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101321032B (en) * | 2008-06-24 | 2012-09-26 | 中兴通讯股份有限公司 | Photosignal waveshape recording method and apparatus |
| CN103453992B (en) * | 2013-09-16 | 2017-01-18 | 清华大学 | Time resolution emission spectrum measuring system capable of measuring multiple spectral lines simultaneously |
| EP3299780A1 (en) * | 2016-09-26 | 2018-03-28 | Berthold Technologies GmbH & Co. KG | Method and system for spectroscopic measurement of optical properties of samples |
| CN106644080A (en) * | 2016-12-06 | 2017-05-10 | 华东师范大学 | System for acquiring time-resolved spectrum on basis of filter technology and acquiring method of system |
| CN107219241B (en) * | 2017-05-05 | 2020-10-16 | 中国科学院上海光学精密机械研究所 | Measuring device and measuring method for in-situ time-resolved X-ray absorption spectrum |
| CN110068555A (en) * | 2018-01-22 | 2019-07-30 | 中国科学院大连化学物理研究所 | The electronic spectrum measuring device and measurement method that photoelectricity two excitation nanoseconds are differentiated |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01187435A (en) * | 1987-08-18 | 1989-07-26 | Nec Corp | Method and device for time-resolved spectroscopy |
| US5412468A (en) * | 1993-03-09 | 1995-05-02 | The Perkin-Elmer Corporation | Grouping of spectral bands for data acquisition in a spectrophotometer |
| US5565982A (en) * | 1994-05-31 | 1996-10-15 | Recon Exploration | Apparatus and method for time resolved spectroscopy |
| US5909278A (en) * | 1996-07-29 | 1999-06-01 | The Regents Of The University Of California | Time-resolved fluorescence decay measurements for flowing particles |
| US6633043B2 (en) * | 2002-01-30 | 2003-10-14 | Ezzat M. Hegazi | Method for characterization of petroleum oils using normalized time-resolved fluorescence spectra |
| JP2004170285A (en) * | 2002-11-21 | 2004-06-17 | Japan Science & Technology Agency | Method and apparatus for measuring optical spectrum |
-
2004
- 2004-09-06 CN CNB2004100738394A patent/CN100392366C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01187435A (en) * | 1987-08-18 | 1989-07-26 | Nec Corp | Method and device for time-resolved spectroscopy |
| US5412468A (en) * | 1993-03-09 | 1995-05-02 | The Perkin-Elmer Corporation | Grouping of spectral bands for data acquisition in a spectrophotometer |
| US5565982A (en) * | 1994-05-31 | 1996-10-15 | Recon Exploration | Apparatus and method for time resolved spectroscopy |
| US5909278A (en) * | 1996-07-29 | 1999-06-01 | The Regents Of The University Of California | Time-resolved fluorescence decay measurements for flowing particles |
| US6633043B2 (en) * | 2002-01-30 | 2003-10-14 | Ezzat M. Hegazi | Method for characterization of petroleum oils using normalized time-resolved fluorescence spectra |
| JP2004170285A (en) * | 2002-11-21 | 2004-06-17 | Japan Science & Technology Agency | Method and apparatus for measuring optical spectrum |
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| CN1587929A (en) | 2005-03-02 |
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