CN102914556A - Optical filter system for energy dispersion X fluorescence spectrophotometer - Google Patents
Optical filter system for energy dispersion X fluorescence spectrophotometer Download PDFInfo
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- CN102914556A CN102914556A CN2012104088830A CN201210408883A CN102914556A CN 102914556 A CN102914556 A CN 102914556A CN 2012104088830 A CN2012104088830 A CN 2012104088830A CN 201210408883 A CN201210408883 A CN 201210408883A CN 102914556 A CN102914556 A CN 102914556A
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- filter
- filter system
- optical filter
- fluorescent spectrometer
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Abstract
The invention provides an optical filter system for an energy dispersion X fluorescence spectrophotometer. The optical filter system comprises a bracket case, wherein the bracket case is provided with a driving motor; a filter disc is arranged on an output shaft of the driving motor; the filter disc can rotate by surrounding a center shaft; at least five optical filter positions are arranged on the filter disc, wherein the central axis of the optical filters are in rotary symmetry; and the optical filters are arranged on the optical filter positions. The optical filter system is arranged between a light pipe and a sample, so that radiation with good monochromaticity can be obtained; and the background caused by original spectrum dispersion in the interesting area of an element spectrum for analyzing is reduced, so that the measurement precision of the spectrum line for measuring is improved.
Description
Technical field
The present invention relates to initial X-ray filtering field, refer to especially a kind of filter system for energy color dispersing X fluorescent spectrometer.
Background technology
Abroad, from the sixties in last century, the people such as Luo Side have succeeded in developing " balanced-filter to " (being called for short " balanced filter film " or " filter disc ") according to element to the principle of the discontinuous variation of low energy absorption of electromagnetic radiation coefficient.It is the difference forming energy passband that utilizes material absorbing limit energy, measure the counting rate of passband internal X-ray, can get rid of again simultaneously the interference of the outer energy of passband, make the relatively poor detector of resolution, also can measure respectively adjacent element XRF counting rate such as scintillation detector, for the rig-site utilization of XRF method provides essential condition, select the application of optical filter in the XRF method for energy and lay a good foundation.Many countries all select optical filter should be used as in various degree research in x-ray fluorescence analysis to energy.And its achievement in research successfully has been used in the x-ray fluorescence analyzer of its production.As match the silent energy-dispersion X-ray fluorescence spectrometer Quant'X that flies your (U.S. is thermoelectric) company development of generation, just has been applied in the optical filter technology wherein.8 optical filter positions and 7 optical filters have been adopted in this detector.
At home, the company that many specialty development x-ray fluorescence analyzers is also arranged selects optical filter should be used as deep research in x-ray fluorescence analysis to energy.For example the Sichuan highly sensitive xrf analysis instrument of universal low energy that newly reaches first observation and control technology company limited development just has been dissolved into the optical filter technology wherein.The use of these optical filters has improved the spectral line power spectrum composition of excitaton source to a great extent, has improved detection efficiency and can also be used for suppressing the strong XRF of some high content component to improve the measuring accuracy of spectral line to be measured in multielement analysis.
Summary of the invention
The objective of the invention is to propose a kind of filter system for energy color dispersing X fluorescent spectrometer, filter system is placed between light pipe and the sample, its objective is as obtaining the better radiation of monochromaticity, with the background that is caused by simple spectrum scattering that reduces in the element spectral region of interest to be analyzed, to improve the measuring accuracy of spectral line to be measured.
Technical scheme of the present invention is achieved in that
A kind of filter system for energy color dispersing X fluorescent spectrometer, described filter system comprises that support box, described support box are equipped with drive motor, on the output shaft of described drive motor filter disc is installed, described filter disc can be around its central shaft rotation, and be provided with about rotational symmetric at least 5 the optical filter positions of its central shaft at described filter disc, described optical filter is equipped with optical filter on the position.
Preferably, it is characterized in that: be provided with 10 optical filter positions on the described filter disc, and be separately installed with at least two kinds of optical filters on the described optical filter position.
Preferably, described 10 optical filters are respectively lead shield cover, the first latten(-tin), the second latten(-tin), the first aluminium flake, the second aluminium flake, zirconium sheet, nickel sheet, the first zirconium nickel compounded plate, molybdenum sheet, the second zirconium nickel sheet compounded plate.
Preferably, the thick 2mm of described lead shield cover.
Preferably, the thickness range of described the first latten(-tin), the second latten(-tin), the first aluminium flake, the second aluminium flake, zirconium sheet, nickel sheet, the first zirconium nickel compounded plate, molybdenum sheet, the second zirconium nickel sheet compounded plate is 0.03mm ~ 0.1mm.
Preferably, be provided with the support lid on the described support box, described support box covers and is provided with the light path outlet.
Preferably, the diameter of described light path outlet is 10mm.
Preferably, described support box is except described light path outlet, and all the other are hermetically-sealed construction.
Preferably, described optical filter position is circular, is provided with X-ray tube on the described support box.
Preferably, described drive motor is step-servo motor, and described filter disc switches automatically by the element according to test.
The invention has the beneficial effects as follows:
1. filter disc of the present invention can reduce other and disturb ray the filter action of primary ray, guarantees to shine the X ray single stable on the specimen, thereby assurance test elements result's is reliable and stable;
2. optical filter is controlled by step-servo motor, can realize automatic shield to X ray by application software, namely is completed rear filter disc and is automatically brought to lead sealing and remains silent, and guarantees that X ray leaks and prevents that detecting device is tired.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the side inner structure schematic diagram of filter system embodiment of the present invention;
Fig. 2 is the back side inner structure schematic diagram of filter system embodiment of the present invention;
Fig. 3 is the external front face structural representation of filter system embodiment of the present invention;
Fig. 4 is the exterior lateral sides structural representation of filter system embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Such as Fig. 1-filter system that is used for energy color dispersing X fluorescent spectrometer shown in Figure 4, described filter system comprises that support box 1, described support box 1 are equipped with drive motor 3, filter disc 5 is installed on the output shaft of described drive motor 3, described filter disc 5 can be around its central shaft rotation, and be provided with about rotational symmetric at least 5 the optical filter positions 6 of its central shaft at described filter disc 5, on the described optical filter position 6 optical filter 7 is installed.
In the embodiment shown in Figure 2, be provided with 10 optical filter positions 6 on the described filter disc 5, and be separately installed with at least two kinds of optical filters 7 on the described optical filter position 6.Described 10 optical filters 7 are respectively lead shield cover, the first latten(-tin), the second latten(-tin), the first aluminium flake, the second aluminium flake, zirconium sheet, nickel sheet, the first zirconium nickel compounded plate, molybdenum sheet, the second zirconium nickel sheet compounded plate.Certain described optical filter 7 also can be changed wherein a kind of or several optical filter according to demand, and is not limited only to the cited kind of this preferred embodiment; Its quantity also can be according to the real needs setting.
In this preferred embodiment, the thick 2mm of described lead shield cover, the thickness range of described the first latten(-tin), the second latten(-tin), the first aluminium flake, the second aluminium flake, zirconium sheet, nickel sheet, the first zirconium nickel compounded plate, molybdenum sheet, the second zirconium nickel sheet compounded plate is 0.03mm ~ 0.1mm.Filter disc of the present invention can reduce other and disturb ray for the filter action of primary ray, guarantees to shine the X ray single stable on the specimen, thereby guarantees the reliable and stable of test elements result, simultaneously to the X ray shielding action.Be completed rear filter disc 5 and can be automatically brought to lead sealing and remain silent, guarantee that X ray does not leak out and prevent that detecting device is tired.
Be provided with support lid 9 on the described support box 1, be provided with light path outlet 2 on the described support lid 9, in order to penetrate the X ray after filtering.Described optical filter position 6 is circular, and the diameter of described light path outlet 2 is 10mm.Position and the diameter of certain described light path outlet 2 also can be according to the real needs adjustment, and various shapes also can be adopted in the optical filter position, and are not limited to position in the present embodiment and shape, size.
Also be provided with X-ray tube on the base plate 8 of support box 1, the drive motor 3 in the present embodiment is step-servo motor, and step-servo motor also is contained on the base plate 8 of support box.
Described filter disc 5 can switch automatically according to the element of test.Specifically, described filter disc 5 adopts micro-stepping to drive by step-servo motor, and servomotor can accurately be controlled the turned position of filter disc 5, guarantees that filter disc optical filter 7 accurately puts in place, and it is short that degree of accuracy can reach 0.045 ° and switching time.Can realize the optical filter 7 that automaticallyes switch according to the different element of test, not need artificial switching, switch operating is controlled by corresponding application software.When the present invention also can make equipment in holding state by application software in addition, the lead shield cover prevented leakage radiation and prevents that detecting device is tired automatically with the exit portal sealing of X-ray tube 4.
Compared with prior art, effect of the present invention is: can be according to the characteristic of optical filter 7, the corresponding optical filter that automaticallyes switch when testing different element filters, obtain the better radiation of monochromaticity and reduce the background that is caused by simple spectrum scattering in the element spectral region of interest to be analyzed, to improve the measuring accuracy of spectral line to be measured.Support box 1 is except the rear ray outlet that filters, and whole support box 1 is hermetically sealed; In the present embodiment, the height of support box 1 is not more than 15mm, can shorten the distance that light path arrives sample, and particularly shielding property is greatly improved, and substantially can reach zero radiation.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. filter system that is used for energy color dispersing X fluorescent spectrometer, it is characterized in that: described filter system comprises that support box, described support box are equipped with drive motor, on the output shaft of described drive motor filter disc is installed, described filter disc can be around its central shaft rotation, and be provided with about rotational symmetric at least 5 the optical filter positions of its central shaft at described filter disc, described optical filter is equipped with optical filter on the position.
2. the filter system for energy color dispersing X fluorescent spectrometer as claimed in claim 1 is characterized in that: be provided with 10 optical filter positions on the described filter disc, and be separately installed with two kinds of optical filters on the described optical filter position at least.
3. the filter system for energy color dispersing X fluorescent spectrometer as claimed in claim 2, it is characterized in that: described 10 optical filters are respectively lead shield cover, the first latten(-tin), the second latten(-tin), the first aluminium flake, the second aluminium flake, zirconium sheet, nickel sheet, the first zirconium nickel compounded plate, molybdenum sheet, the second zirconium nickel sheet compounded plate.
4. the filter system for energy color dispersing X fluorescent spectrometer as claimed in claim 3 is characterized in that: the thick 2mm of described lead shield cover.
5. the filter system for energy color dispersing X fluorescent spectrometer as claimed in claim 3, it is characterized in that: the thickness range of described the first latten(-tin), the second latten(-tin), the first aluminium flake, the second aluminium flake, zirconium sheet, nickel sheet, the first zirconium nickel compounded plate, molybdenum sheet, the second zirconium nickel sheet compounded plate is 0.03mm ~ 0.1mm.
6. the filter system for energy color dispersing X fluorescent spectrometer as claimed in claim 2 is characterized in that: be provided with the support lid on the described support box, described support box covers and is provided with the light path outlet.
7. the filter system for energy color dispersing X fluorescent spectrometer as claimed in claim 6 is characterized in that: the diameter of described light path outlet is 10mm.
8. the filter system for energy color dispersing X fluorescent spectrometer as claimed in claim 6 is characterized in that: described support box is except described light path outlet, and all the other are hermetically-sealed construction.
9. the filter system for energy color dispersing X fluorescent spectrometer as claimed in claim 1 is characterized in that: described optical filter position is provided with X-ray tube for circular on the described support box.
10. the filter system for energy color dispersing X fluorescent spectrometer as claimed in claim 1, it is characterized in that: described drive motor is step-servo motor, described filter disc switches automatically by the element according to test.
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| CN2012104088830A CN102914556A (en) | 2012-10-23 | 2012-10-23 | Optical filter system for energy dispersion X fluorescence spectrophotometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104088830A CN102914556A (en) | 2012-10-23 | 2012-10-23 | Optical filter system for energy dispersion X fluorescence spectrophotometer |
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| CN102914556A true CN102914556A (en) | 2013-02-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105513251A (en) * | 2015-12-10 | 2016-04-20 | 天津艾思科尔科技有限公司 | Detector for fire hazard detection |
| CN105788694A (en) * | 2014-12-24 | 2016-07-20 | 丹东市科大仪器有限公司 | Built-in disc type optical filter switching device of X-ray beam limiter |
| CN107622808A (en) * | 2017-09-11 | 2018-01-23 | 江苏天瑞仪器股份有限公司 | A kind of porous light transparent member |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101424636A (en) * | 2008-12-04 | 2009-05-06 | 中国计量学院 | A kind of device and method of rapidly and nondestructively detecting content of green tea composition |
| CN201600339U (en) * | 2010-01-20 | 2010-10-06 | 纳优科技（北京）有限公司 | Filtering collimator combined device of X-ray fluorescence spectrometer |
-
2012
- 2012-10-23 CN CN2012104088830A patent/CN102914556A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101424636A (en) * | 2008-12-04 | 2009-05-06 | 中国计量学院 | A kind of device and method of rapidly and nondestructively detecting content of green tea composition |
| CN201600339U (en) * | 2010-01-20 | 2010-10-06 | 纳优科技（北京）有限公司 | Filtering collimator combined device of X-ray fluorescence spectrometer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105788694A (en) * | 2014-12-24 | 2016-07-20 | 丹东市科大仪器有限公司 | Built-in disc type optical filter switching device of X-ray beam limiter |
| CN105513251A (en) * | 2015-12-10 | 2016-04-20 | 天津艾思科尔科技有限公司 | Detector for fire hazard detection |
| CN107622808A (en) * | 2017-09-11 | 2018-01-23 | 江苏天瑞仪器股份有限公司 | A kind of porous light transparent member |
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Application publication date: 20130206 |