CN202837182U - Atomic fluorescence spectrophotometer optical system - Google Patents
Atomic fluorescence spectrophotometer optical system Download PDFInfo
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- CN202837182U CN202837182U CN201220414879.0U CN201220414879U CN202837182U CN 202837182 U CN202837182 U CN 202837182U CN 201220414879 U CN201220414879 U CN 201220414879U CN 202837182 U CN202837182 U CN 202837182U
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- optical system
- photomultiplier
- chopper
- signal
- atomic fluorescence
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Abstract
The utility model provides an atomic fluorescence spectrophotometer optical system which belongs to the technical field of atomic fluorescence spectrophotometers. Light from an excitation light source of the atomic fluorescence spectrophotometer optical system converges at the center of an atomizer after passing through incidence optical system. Some of the light (reference signals) from the excitation light source enters a photomultiplier after sequentially passing through a reference light transmission system and a chopper. Fluorescence signals from the excitation light source enters the photomultiplier after sequentially passing through an optical receiving system and the chopper. The reference signals and the fluorescence signals enter the photomultiplier in the order of time and are converted into electrical signals and input into a signal acquisition processing system. The measured reference signals after being processed are fed back to fluorescence signals measuring result to rectify data. The atomic fluorescence spectrophotometer optical system is capable of avoiding effects of unstable light sources to measuring results, breaks through a technical bottleneck which restricts development of the atomic fluorescence spectrophotometer all the time, and improves performance indicators of instruments.
Description
Technical field
The utility model relates to a kind of atomic fluorescence spectrophotometer optical system, 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 be for the technology that solves existing calibration light source fluctuation be before exciting light enters atomizer, to tell part light to enter photoelectric detector, 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, the good problem of calibration light source fluctuation, and then a kind of atomic fluorescence spectrophotometer optical system is provided.
The purpose of this utility model is achieved through the following technical solutions:
A kind of atomic fluorescence spectrophotometer optical system comprises: atomizer, excitation source, incident optical system, receiving optics, reference optical transmission system, chopper, photomultiplier and signal acquiring processing system.The light that described excitation source sends is through converging at the center of atomizer behind the incident optical system, the part light (reference signal) that excitation source sends enters photomultiplier through chopper again by the reference optical transmission system, the fluorescence signal that excitation source excites passes through receiving optics, enter photomultiplier through chopper again, reference signal and fluorescence signal by chopper chronologically selecting sequence enter photomultiplier and be converted into electric signal and be input to signal acquiring processing system.The reference signal of surveying feeds back after treatment in the fluorescence signal measurement result and carries out Data correction.
The utility model compared with prior art has following advantage: the utility model effectively the calibration light source instability on the impact of measurement result, overcome the defective of existing calibration light source fluctuation technology, break through the technical bottleneck that is all the time restricting the development of atomic fluorescence degree meter, improved the performance index of instrument.
Description of drawings
Fig. 1 is the structural representation of the utility model atomic fluorescence spectrophotometer optical system;
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: the 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 atomic fluorescence spectrophotometer optical system that the present embodiment provides, comprise: atomizer 1, excitation source 2, incident optical system 3, receiving optics 4, reference optical transmission system 5, chopper 6, photomultiplier 7 and signal acquiring processing system 8, the light that described excitation source 2 sends is through converging at the center of atomizer 1 behind the incident optical system 3, the part light (reference signal) that excitation source 2 sends enters photomultiplier 7 through chopper 6 again by reference optical transmission system 5, the fluorescence signal that excitation source 2 excites presses in into photoelectricity multiplier tube 7 through chopper 6 by receiving optics 4 again, reference signal and fluorescence signal by chopper 6 chronologically selecting sequence enter photomultiplier 7 and be converted into electric signal and be input to signal acquiring processing system 8.
Described reference optical transmission system 5 is optical fiber, lens or catoptron.
Described chopper 6 is mechanical optical shutter or acoustooptic electrooptic crystal optical gate, and mechanical optical shutter is driven by solenoid valve or stepper motor, and the acoustooptic electrooptic crystal optical gate is driven by acousto-optic-electric luminous effect controller.
Excitation source institute radiant light is through placing incident optical system thereafter to converge at the atomizer center, and institute's fluorescence excitation signal enters photomultiplier through receiving optics.The part light that excitation source sends enters photomultiplier by reference optical transmission system (adopting all kinds of optical device transmission modes such as optical fiber, lens, catoptron), (chopper can be mechanical optical shutter or acoustooptic electrooptic crystal light gate structure by the control chopper for fluorescence signal and optical excitation signal, mechanical optical shutter is driven by solenoid valve or stepper motor, and the acoustooptic electrooptic crystal optical gate is driven by acousto-optic-electric luminous effect controller) chronologically selecting sequence enter same photomultiplier and be converted into electric signal input signal acquisition processing system.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 angled 1-7 excitation source and the related device of having added of excitation source.) 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. atomic fluorescence spectrophotometer optical system, comprise: atomizer, excitation source, incident optical system, receiving optics, the reference optical transmission system, chopper, photomultiplier and signal acquiring processing system, it is characterized in that, the light that described excitation source sends is through converging at the center of atomizer behind the incident optical system, the part light that excitation source sends enters photomultiplier through chopper again by the reference optical transmission system, the fluorescence signal that excitation source excites enters photomultiplier through chopper again by receiving optics, reference signal and fluorescence signal by chopper chronologically selecting sequence enter photomultiplier and be converted into electric signal and be input to signal acquiring processing system, the reference signal of surveying feeds back after treatment in the fluorescence signal measurement result and carries out Data correction.
2. atomic fluorescence spectrophotometer optical system according to claim 1 is characterized in that, described reference optical transmission system is optical fiber, lens or catoptron.
3. atomic fluorescence spectrophotometer optical system according to claim 1 is characterized in that, described chopper is mechanical optical shutter or acoustooptic electrooptic crystal optical gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220414879.0U CN202837182U (en) | 2012-08-20 | 2012-08-20 | Atomic fluorescence spectrophotometer optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220414879.0U CN202837182U (en) | 2012-08-20 | 2012-08-20 | Atomic fluorescence spectrophotometer optical system |
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| Publication Number | Publication Date |
|---|---|
| CN202837182U true CN202837182U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220414879.0U Expired - Lifetime CN202837182U (en) | 2012-08-20 | 2012-08-20 | Atomic fluorescence spectrophotometer optical system |
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Cited By (3)
| 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 |
| 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 |
-
2012
- 2012-08-20 CN CN201220414879.0U patent/CN202837182U/en not_active Expired - Lifetime
Cited By (3)
| 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 |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |
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| CX01 | Expiry of patent term |