CN102346069B - Ultraviolet-visible detector monochromator - Google Patents
Ultraviolet-visible detector monochromator Download PDFInfo
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- CN102346069B CN102346069B CN 201010243699 CN201010243699A CN102346069B CN 102346069 B CN102346069 B CN 102346069B CN 201010243699 CN201010243699 CN 201010243699 CN 201010243699 A CN201010243699 A CN 201010243699A CN 102346069 B CN102346069 B CN 102346069B
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Abstract
The invention discloses an ultraviolet-visible detector monochromator, which comprises a lamp box, an optical lens, a slit seat, a filter disc device, a grating device, a beam splitter and a reflector, wherein the lamp box is in a horizontal type, and a deuterium lamp and a tungsten lamp are arranged in the lamp box and are located at a position close to a front panel of a monochromator box body; and the filter disc device comprises a filter disc and a drive motor which is connected with the filter disc and drives the filter disc to rotate, and the filter disc is provided with an empty light through hole and a light through hole on which holmium glass is arranged. In the ultraviolet-visible detector monochromator, since the lamp box is in the horizontal type, when the tungsten lamp is needed to be replaced, only the front panel and a front metal plate door panel of the monochromator are needed to be opened, and thus the tungsten lamp can be directly taken down; when the deuterium lamp is needed to be replaced, only two screws on the deuterium lamp are needed to be unscrewed, and then the deuterium lamp can be taken down, so that the simplicity and the convenience in lamp replacement operation are realized; and in addition, the filter disc is provided with the light through hole on which the holmium glass is arranged, so that the wavelength calibration operation of the monochromator can be carried out through the holmium glass.
Description
Technical field
The present invention relates to the liquid-phase chromatographic analysis technical field, more particularly, relate to a kind of ultraviolet-visible detector monochromator.
Background technology
Ultraviolet-visible detector monochromator, be the chief component of detecting device light path system, and its Main Function is the monochromatic light that the polychromatic spectra of 200nm to 800nm wave band that deuterium lamp and tungsten lamp are sent resolves into certain wavelength.Wherein, the monochromatic light of certain wavelength be decomposed to form by ultraviolet-visible detector monochromator shines on the detecting device light hole through beam splitter and catoptron again, when having mobile phase to flow through the detection cell of detecting device flow cell, this mobile phase can absorb this monochromatic light, unabsorbed monochromatic light is again through opto-electronic conversion generation current signal, and this current signal can be for carrying out stratographic analysis and detection.
Ultraviolet-visible detector monochromator mainly is comprised of light source, lens, slit, optical filter, grating, beam splitter and catoptron, its specific works process is: the light that light source sends through lens focus to aperture, select a certain optical filter according to needing to rotate the optical filter dish, obtain the light of a certain wave band, the continuous spectrum of mating plate shines on grating after filtration, select the light of certain wavelength through rotating shutter, the light of certain single wavelength is forming on measurement and the light hole of reference two-way irradiation at flow cell through beam splitter and catoptron respectively.
Light source generally mostly is deuterium lamp and tungsten lamp, and the use wavelength coverage of deuterium lamp is between 200-600nm, and along with the increasing of wavelength, light intensity reduces gradually; The use wavelength band of tungsten lamp is between 400-900nm.Wherein, deuterium lamp and tungsten lamp are all to consume thing, can become gradually bad until can not use along with the continuous service property (quality) of monochromator, now, just need to be changed.Yet in existing monochromator, lamp box is vertically placed, when needs etc. change deuterium lamp or tungsten lamp, the upper cover of monochromator need to be turned on and just can get lamp, very inconvenient due to the unlatching of monochromator upper cover again, like this, the replacing of deuterium lamp or tungsten lamp will be comparatively complicated.
And existing ultraviolet-visible detector monochromator does not have the wavelength calibration function, can't carry out the wavelength self calibration, the inaccurate problem of the test result that may cause UV-visible detector to obtain.
Summary of the invention
In view of this, the invention provides a kind of ultraviolet-visible detector monochromator, simple and conveniently changed lamp operation and there is the wavelength self-calibration function realizing.
For achieving the above object, the technical scheme of proposition is as follows:
A kind of ultraviolet-visible detector monochromator, comprise lamp box, lens, slit base, filter disc device, mounting for grating, beam splitter and catoptron, wherein:
Described lamp box is horizontal lamp box, and deuterium lamp and tungsten lamp arrange in lamp box, is positioned at the front panel position near the monochromator casing;
Described filter disc device comprises filter disc and the drive motor that is connected, drives this filter disc to rotate with described filter disc, wherein: be provided with an empty light hole and the light hole that is placed with holmium glass on described filter disc.
Preferably, described filter disc comprises: matrix, be connected to the gland on described matrix and be arranged on the optocoupler catch on described gland, wherein:
Be provided with pad between described matrix and gland;
Be provided with a plurality of optical filter light holes that are placed with optical filter on described gland.
Preferably, the grating in described mounting for grating is concave grating.
Preferably, the quantity of described optical filter light hole is 4.
Preferably, described pad is rubber sheet gasket.
Can find out from above-mentioned technical scheme, in ultraviolet-visible detector monochromator disclosed by the invention, because lamp box is horizontal lamp box, when needs are changed tungsten lamp, only need open front panel and the front panel beating door-plate of monochromator, just can directly take off tungsten lamp; While changing deuterium lamp, only need back out again two screws on deuterium lamp, extract deuterium lamp out, realize the simple and convenient lamp operation of changing; And, be provided with the light hole that is placed with holmium glass on filter disc, can carry out the wavelength calibration work of monochromator by holmium glass.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only 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.
The structural representation that Fig. 1 is the disclosed a kind of ultraviolet-visible detector monochromator of the embodiment of the present invention;
The structural representation that Fig. 2 is the disclosed filter disc of the embodiment of the present invention;
The cut-open view that Fig. 3 is the disclosed filter disc of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of ultraviolet-visible detector monochromator, simple and conveniently changed lamp operation and there is the wavelength self-calibration function realizing.
The principle of work of ultraviolet-visible detector monochromator is:
The UV-visible detector monochrome is that a kind of instrument absorbs the equipment that the ultraviolet-visible light intensity is determined sample size in detection cell by working sample, belongs to analytical instrument a kind of of absorption spectrum type.The ultimate principle of its design is based on Lambert-Beer's law:
Suppose: ε is absorptivity, and L is flow cell thickness, and C is sample concentration, I
ginsengfor reference road light intensity, I
samplefor measuring the road light intensity, the formula of absorption value that records so described working sample is as follows:
Work as ε, when L is constant, absorption value AU is proportional to the concentration of working sample.The absorption value of therefore trying to achieve each component of sample just can obtain each component relative concentration.
Specifically ultraviolet-visible detector monochromator is described by the following examples.
Described ultraviolet-visible detector monochromator, structure as shown in Figure 1, comprises lamp box 1, lens 2, slit base 3, filter disc device, mounting for grating 6, beam splitter and catoptron, wherein:
Lamp box 1 is horizontal lamp box, and deuterium lamp and tungsten lamp arrange in lamp box, is positioned at the front panel position near the monochromator casing;
The filter disc device comprises filter disc 4 and the drive motor 5 that is connected, drives this filter disc to rotate with filter disc 4, and, be provided with an empty light hole on filter disc 4, also be provided with the light hole that is placed with holmium glass.
Concrete, deuterium lamp and tungsten lamp arrange in lamp box, because lamp box 1 is horizontal lamp box, like this, deuterium lamp and tungsten lamp can be positioned at the position near the front panel of monochromator casing, when needs are changed tungsten lamp, only need open front panel and the front panel beating door-plate of monochromator, just can directly take off tungsten lamp and replace with new tungsten lamp; While needing to change deuterium lamp, only need back out again two screws on deuterium lamp, extract deuterium lamp out and replace with new deuterium lamp.
Below in conjunction with Fig. 2 and Fig. 3, stress the filter disc of this monochromator.
Described filter disc comprises: matrix 41, is connected to the gland 42 on matrix 41 and is arranged on the optocoupler catch 44 on gland 42, wherein:
In order to strengthen the sealing of matrix 41 and gland 42, be provided with pad 43 between matrix 41 and gland 42, this pad is specifically as follows rubber sheet gasket.
Except being provided with light hole 45 and empty light hole 46, also be provided with a plurality of optical filter light holes 47 on gland 42, generally, be provided with four optical filter light holes 47.
Wherein, be placed with holmium glass in light hole 45, in empty light hole 46, do not place any equipment, in optical filter light hole 47, be placed with optical filter.
Concrete, be placed on the optical filter kind difference in optical filter light hole 47, in the monochromator course of work, the drive motor action drives filter disc and rotates, and selects a certain optical filter, intercepts the light of a certain wave band by this optical filter.
In monochromator work a period of time or, after being collided, now the test result of monochromator just inaccurate problem may occur, now, need to carry out wavelength calibration to it.
Concrete, employing is arranged on the holmium glass in light hole 45 on the filtering dish and carries out the wavelength calibration action, below is elaborated:
Step 1, unlatching drive motor 5, it drives filtering dish 4 and rotates, and the slit that light hole 46 is aimed on slit base 3, now, carry out scanning wavelength work, and the writing scan data;
The scan-data obtained in the scan-data obtained in step 3, comparison step 1 and step 2, the error of peak valley data in the scan-data that the peak valley data in the scan-data that detecting step 2 obtains and step 1 corresponding thereto obtain.If error all 2nm with interior mean this monochromator by the checking; If error surpasses 2nm, according to the numerical value adjustment of error, drive the rotational angle of the stepper motor in mounting for grating 6.
Repeat above-mentioned steps, meet the demands until detect the error obtained.
In the disclosed monochromator of above-described embodiment, mounting for grating 6 comprises grating and the stepper motor that drives grating to rotate, and concrete grating can be concave grating.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (1)
1. a ultraviolet-visible detector monochromator, comprise lamp box, lens, slit base, filter disc device, mounting for grating, beam splitter and catoptron, it is characterized in that, described lamp box is horizontal lamp box, and deuterium lamp and tungsten lamp arrange in lamp box, be positioned at the front panel position near the monochromator casing;
Described filter disc device comprises filter disc and the drive motor that is connected, drives this filter disc to rotate with described filter disc, wherein: be provided with an empty light hole and the light hole that is placed with holmium glass on described filter disc;
Described filter disc comprises: matrix, is connected to the gland on described matrix and is arranged on the optocoupler catch on described gland, wherein:
Be provided with pad between described matrix and gland;
Be provided with a plurality of optical filter light holes that are placed with optical filter on described gland;
Wherein, the grating in described mounting for grating is concave grating;
Wherein, the quantity of described optical filter light hole is 4;
Wherein, described pad is rubber sheet gasket.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010243699 CN102346069B (en) | 2010-07-29 | 2010-07-29 | Ultraviolet-visible detector monochromator |
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| CN 201010243699 CN102346069B (en) | 2010-07-29 | 2010-07-29 | Ultraviolet-visible detector monochromator |
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| CN102346069A CN102346069A (en) | 2012-02-08 |
| CN102346069B true CN102346069B (en) | 2013-12-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104777259B (en) * | 2015-04-16 | 2017-09-12 | 浙江福立分析仪器有限公司 | UV-detector optical fine device |
| CN105043542A (en) * | 2015-08-05 | 2015-11-11 | 中国电子科技集团公司第四十一研究所 | Continuous adjustable monochromatic output device based on gradual change optical filter |
| CN105092498A (en) * | 2015-09-17 | 2015-11-25 | 天津港东科技发展股份有限公司 | Control device for double-beam ultraviolet and visible spectrophotometer |
| CN111175425A (en) * | 2020-02-24 | 2020-05-19 | 大连依利特分析仪器有限公司 | Diode array detector based on multistage wavelength calibration and calibration method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101324466A (en) * | 2007-06-12 | 2008-12-17 | 上海欣茂仪器有限公司 | Single beam ultraviolet-visible spectrophotometer |
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| SE8107809L (en) * | 1981-12-28 | 1983-06-29 | Lkb Biochrom Ltd | PHOTOMETER |
| CN2612934Y (en) * | 2003-04-30 | 2004-04-21 | 北京普析通用仪器有限责任公司 | Portable photometer |
| CN2833539Y (en) * | 2005-09-30 | 2006-11-01 | 北京普析通用仪器有限责任公司 | Small-sized deuterium tungsten lamp composite light source |
| EP1998155A1 (en) * | 2007-05-30 | 2008-12-03 | Roche Diagnostics GmbH | Method for wavelength calibration of a spectrometer |
| CN201237528Y (en) * | 2008-07-18 | 2009-05-13 | 李德生 | Spectrophotometer for calibrating wavelength value by atomic spectral line |
| CN201392242Y (en) * | 2009-04-28 | 2010-01-27 | 徐培实 | Fixed combined light source for spectrometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101324466A (en) * | 2007-06-12 | 2008-12-17 | 上海欣茂仪器有限公司 | Single beam ultraviolet-visible spectrophotometer |
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