CN202794037U - Device for deducting light source fluctuation of atomic fluorescence photometer - Google Patents
Device for deducting light source fluctuation of atomic fluorescence photometer Download PDFInfo
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- CN202794037U CN202794037U CN201220414279.4U CN201220414279U CN202794037U CN 202794037 U CN202794037 U CN 202794037U CN 201220414279 U CN201220414279 U CN 201220414279U CN 202794037 U CN202794037 U CN 202794037U
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Abstract
The utility model provides a device for the deducting light source fluctuation of an atomic fluorescence photometer, which belongs to the technical field of atomic fluorescence photometers. The device comprises an atomizer, an excitation light source, an incident optical system, a receiving optical system, a photomultiplier and a signal acquisition and process system, light emitted by the excitation light source converges in the center of the atomizer via the incident optical system, and an excitation fluorescence signal enters into the photomultiplier and is converted into an electric signal which is input into the signal acquisition and process system. The excitation light signal is calculating via an excitation light reflecting device or by adopting methods of directly detecting excitation light source scatter and background light signal, and the excitation light signal is processed and returned to a fluorescence signal measurement result for data correction. Compared with the prior art, the utility model has the advantages that the device can correct influence of unstability of light source on the measurement result, breaches the technical bottleneck restricting the development of atomic fluorescence photometers all the time, and improves the performance indexes of instruments.
Description
Technical field
The utility model relates to a kind of device for atomic fluorescence spectrophotometer deduction light source fluctuation, belongs to the atomic fluorescence spectrophotometer technical field.
Background technology
Atomic fluorescence spectrometry is a kind of based on the Measurement and analysis thing gaseous state free atom radiation-absorbing method for analyzing very small amount of element that characteristic spectral line intensity that rear deexcitation launches carries out quantitative test that is excited.Atomic fluorescence spectrophotometric is gone through the development in more than 40 years and perfect, now become in the assay laboratory one of analytical technology the most commonly used of inorganic elements, be applicable to the trace detection of the elements such as As, Sb, Bi, Se, Te, Ge, Sn, Pb, Zn, Cd, Hg, be widely used in the various fields such as geology, metallurgy, environmental science, life science, food hygiene, material science.
Existing atomic fluorescence spectrophotometer adopts on-dispersive formula optical system more, its structure is seen Fig. 2, high performance hollow cathode lamp 12 is as excitation source, converge at atomizer 11 places through incident lens combination 13, the direction vertical with excitation source (or angled with light source), its fluorescence excitation is entered photomultiplier 15 and is reached host computer analysis through signal acquiring processing system 16 by receiving lens system 14.Excitation source is a vitals of atomic fluorescence spectrophotometer, and the stability of its emittance directly affects apparatus measures as a result repeatability and accuracy.The excitation source that is mainly used at present atomic fluorescence spectrophotometer is hollow cathode lamp, and its fluctuation is very large on the impact of measurement result, is restricting the further raising of instrument performance.And the technology of existing calibration light source fluctuation is to tell part light to enter photoelectric detector before exciting light enters atomizer, because the fluorescence signal detection detects with optical excitation signal and has adopted two different photoelectric detectors and different amplification systems, device performance difference causes the inconsistent of measurement result, well calibration light source fluctuation.
Summary of the invention
The purpose of this utility model is for solving existing problem, and then a kind of device for atomic fluorescence spectrophotometer deduction light source fluctuation is provided.
The purpose of this utility model is achieved through the following technical solutions:
A kind of device for atomic fluorescence spectrophotometer deduction light source fluctuation, comprise: atomizer, excitation source, incident optical system, receiving optics, photomultiplier and signal acquiring processing system, the light that described excitation source penetrates converges at the center of atomizer by incident optical system, and institute's fluorescence excitation signal enters photomultiplier and is converted into electric signal input signal acquisition processing system through receiving optics.
The utility model compared with prior art has following advantage: the utility model effectively calibration light source instability has been broken through the technical bottleneck that is all the time restricting the atomic fluorescence spectrophotometer development to the impact of measurement result, has improved the performance index of instrument.
Description of drawings
Fig. 1 is the apparatus structure synoptic diagram that the utility model is used for atomic fluorescence spectrophotometer deduction light source fluctuation;
Fig. 2 is the structural representation of existing atomic fluorescence spectrophotometer.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail: present embodiment is implemented under take technical solutions of the utility model as prerequisite, has provided detailed embodiment, but protection domain of the present utility model is not limited to following embodiment.
As shown in Figure 1, a kind of device for atomic fluorescence spectrophotometer deduction light source fluctuation that present embodiment provides, comprise: atomizer 1, excitation source 2, incident optical system 3, receiving optics 4, photomultiplier 6 and signal acquiring processing system 7, the light that described excitation source 2 penetrates converges at the center of atomizer 1 by incident optical system 3, and institute's fluorescence excitation signal enters photomultiplier 6 and is converted into electric signal input signal acquisition processing system 7 through receiving optics 4.Such scheme calculates optical excitation signal by the mode of measuring excitation source scattering and bias light signal.
Further, also comprise exciting light reflection unit 5, described exciting light reflection unit 5 is arranged on the light path between incident optical system 3 and the receiving optics 4.
Described exciting light reflection unit 5 is mechanical reflex reflector or optics reflex reflector.
2 radiant lights of excitation source are through placing thereafter incident optical system 3 to converge at the center of atomizer 1, and institute's fluorescence excitation signal enters photomultiplier 6 through receiving optics 4.The part light that excitation source sends can be mechanical reflex reflector or optics reflex reflector by exciting light reflection unit 5() enter photomultiplier 6, fluorescence signal and optical excitation signal enter same photomultiplier 6 and are converted into electric signal input signal acquisition processing system 7 by control exciting light reflection unit 5 selecting sequences.Optical excitation signal feeds back in the fluorescence signal measurement result after gathering and processing and carries out Data correction, can effectively deduct the impact that light source fluctuation brings.(in Fig. 1, only drawn the situation of single track optical system, two pass and multiple tracks optical system on the basis of single track optical system with Fig. 1 in 1-7 excitation source of the angled adding of excitation source and related device.) in this system, fluorescence signal and optical excitation signal use same photomultiplier and amplifying circuit, have avoided the inconsistent impact on measurement result of photomultiplier and circuit devcie.
The above; it only is the better embodiment of the utility model; these embodiments all are based on the different implementations under the utility model general idea; and protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.
Claims (3)
1. one kind is used for the device that atomic fluorescence spectrophotometer is deducted light source fluctuation, comprise: atomizer, excitation source, incident optical system, receiving optics, photomultiplier and signal acquiring processing system, it is characterized in that, the light that described excitation source penetrates converges at the center of atomizer by incident optical system, and institute's fluorescence excitation signal enters photomultiplier and is converted into electric signal input signal acquisition processing system through receiving optics.
2. the device for atomic fluorescence spectrophotometer deduction light source fluctuation according to claim 1 is characterized in that, also comprises the exciting light reflection unit, and described exciting light reflection unit is arranged on the light path between incident optical system and the receiving optics.
3. the device for atomic fluorescence spectrophotometer deduction light source fluctuation according to claim 2 is characterized in that described exciting light reflection unit is mechanical reflex reflector or optics reflex reflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201220414279.4U CN202794037U (en) | 2012-08-20 | 2012-08-20 | Device for deducting light source fluctuation of atomic fluorescence photometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220414279.4U CN202794037U (en) | 2012-08-20 | 2012-08-20 | Device for deducting light source fluctuation of atomic fluorescence photometer |
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| CN202794037U true CN202794037U (en) | 2013-03-13 |
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| CN201220414279.4U Expired - Lifetime CN202794037U (en) | 2012-08-20 | 2012-08-20 | Device for deducting light source fluctuation of atomic fluorescence photometer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105628662A (en) * | 2015-12-31 | 2016-06-01 | 北京博晖创新光电技术股份有限公司 | Atomic fluorescence spectrophotometer |
| CN105738332A (en) * | 2016-02-02 | 2016-07-06 | 吉林大学 | Removal method suitable for atomic fluorescent scattering jamming |
| CN106018368A (en) * | 2016-06-30 | 2016-10-12 | 北京吉天仪器有限公司 | Atomic fluorescence spectrophotometer and working method thereof |
| CN106153590A (en) * | 2016-06-30 | 2016-11-23 | 北京吉天仪器有限公司 | Atomic fluorescence spectrophotometer and method of work thereof |
| CN114646626A (en) * | 2022-05-20 | 2022-06-21 | 杭州春来科技有限公司 | Water quality heavy metal detection method and system |
-
2012
- 2012-08-20 CN CN201220414279.4U patent/CN202794037U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105628662A (en) * | 2015-12-31 | 2016-06-01 | 北京博晖创新光电技术股份有限公司 | Atomic fluorescence spectrophotometer |
| CN105738332A (en) * | 2016-02-02 | 2016-07-06 | 吉林大学 | Removal method suitable for atomic fluorescent scattering jamming |
| CN105738332B (en) * | 2016-02-02 | 2018-05-25 | 吉林大学 | A kind of subtraction method suitable for atomic fluorescence scattering interference |
| CN106018368A (en) * | 2016-06-30 | 2016-10-12 | 北京吉天仪器有限公司 | Atomic fluorescence spectrophotometer and working method thereof |
| CN106153590A (en) * | 2016-06-30 | 2016-11-23 | 北京吉天仪器有限公司 | Atomic fluorescence spectrophotometer and method of work thereof |
| CN114646626A (en) * | 2022-05-20 | 2022-06-21 | 杭州春来科技有限公司 | Water quality heavy metal detection method and system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20130313 |
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| CX01 | Expiry of patent term |