CN205120576U - Laser spectrophotometer - Google Patents
Laser spectrophotometer Download PDFInfo
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- CN205120576U CN205120576U CN201520787857.2U CN201520787857U CN205120576U CN 205120576 U CN205120576 U CN 205120576U CN 201520787857 U CN201520787857 U CN 201520787857U CN 205120576 U CN205120576 U CN 205120576U
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- laser
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- absorption cell
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Abstract
The utility model discloses a laser spectrophotometer, including dividing the CD a plurality of mono -colour lasers, this a plurality of mono -colour lasers along circumference interval set up in divide the CD to divide the CD to realize the switching of different mono -colour lasers through rotating, the absorption cell for place the required volume of awaiting measuring sample, the absorption cell set up in the rear end of dividing the CD, the detector, the detector set up in the rear end of absorption cell, so that one of them the mono -colour laser that divides the CD sends laser to be passed through the absorption cell and arrives the detector, the detector is used for detecting the relevant parameter through the laser behind the absorption cell. The utility model provides a carry out measuring laser spectrophotometer through the mono -colour laser that rotates, through a plurality of monochromatic light that have better coherence as measuring light sources, improved the not high shortcoming of prior art spectrophotometer measurement accuracy, more extensive suitability and practical value have.
Description
Technical field
The utility model relates to a kind of laser spectrophotometer, particularly relates to the laser spectrophotometer that a kind of mono-colour laser turned by wheel carries out measuring.
Background technology
Spectrophotometer has very important value in modern science and technology.In the world, analytical work amount has 20% ~ 30% to complete with spectrophotometer.In China, spectrophotometer is its leading position more aobvious in research and production, and play very important effect in all sectors of the national economy, its Social benefit and economic benefit is far more than instrument and creates the output value.In view of the importance of this quasi-instrument in national economy, it is listed in the working measuring instrument catalogue of People's Republic of China's compulsory verification.
Photometer involved by the utility model is mainly analysis spectrophotometer, and this analysis spectrophotometer utilizes the absorption spectrum of material to carry out chemical composition and the content analysis of material.The analysis of prior art with spectrophotometric structured flowchart as shown in Figure 1, comprise measurement light source 1 ', monochromator 2 ', absorption cell 3 ', detecting device 4 ' and indicator 5 '.Measurement light source 1 ' adopts incandescent lamp, hydrogen arc lamp or this special lamp etc. to produce a spectrum continuous print light source usually, described measurement light source 1 ' is filtered by monochromator 2 ' and forms monochromatic light, the monochromatic light formed by monochromator 2 ', by described absorption cell 3 ', obtains measurement result finally by detecting device 4 ' and is shown on indicator 5 '.Described monochromator 2 ' forms primarily of slit, dispersion element (prism or grating) and collimating mirror, filtered by monochromator 2 ' and obtain monochromatic light, interval 10nm value once, then carry out analysis to the result measured each time and obtain absorption spectrum, the accuracy of monochromator 2 ' directly affects the precision of spectrophotometer measurement result.
There is following limitation in the analysis spectrophotometer of prior art:
(1) because the electronic spectrum of most of material molecule is in UV and visible spectra district, minority is in near-infrared region.And the spectrum of the measurement light source that prior art uses mainly concentrates on visible ray, in chemical analysis, the scope of application is limited by very large.
(2) monochromatic light that produced by the mode of dispersion of the monochromator of prior art, still belongs to the narrower polychromatic light of frequency band in essence; In qualitative analysis, determine material composition according to the wavelength indicating value of absorption peak, the judgement that wavelength error may make the mistake, when carrying out simultaneous determination of multiponents, absorption spectrum is overlapping serious, or the relative concentration of one of them composition is in other components are very little time, error at measurment is comparatively large, and resolution is low; In quantitative test, the Beer law applied is be only applicable to monochromatic strictly speaking, and resolving power is poor, spectrum is impure will affect the accuracy of quantitative test.
(3) spectrophotometer of prior art cannot take into account luminous flux and measurement sensistivity, if namely the slit of monochromator is too narrow, then luminous flux is too little, affects measurement sensistivity, and slit is too wide, monochromatic light purity difference; Photometric Accuracy and luminosity repeatability are affected; Due to light source accuracy limitations, make detecting device can only measure the light intensity of transmitted light, the phase differential before and after projection light cannot be measured, analysis requirement cannot be met.
Utility model content
The purpose of this utility model is the deficiency overcoming prior art, a kind of mono-colour laser turned by wheel is provided to carry out the laser spectrophotometer measured, by multiple monochromatic light with better coherence as measurement light source, improve the shortcoming that prior art spectrophotometer measurement precision is not high, there is applicability and practical value widely.
The utility model solves the technical scheme that its technical matters adopts:
A kind of laser spectrophotometer, comprising:
Divide CD, comprise a plurality of mono-colour laser, this plurality of mono-colour laser is circumferentially arranged at intervals at described point CD, to realize the switching of different mono-colour laser by rotating point CD;
Absorption cell, for placing required sample to be measured, described absorption cell is arranged at the rear end of described point CD;
Detecting device, described detecting device is arranged at the rear end of described absorption cell, and send laser to make the mono-colour laser of one of them of described point CD and arrive detecting device by absorption cell, described detecting device is for detecting the correlation parameter of the laser after by absorption cell.
Described point of CD comprises the laser instrument mounting hole along the circumferential direction arranged and the axis hole being arranged at disc centre, also comprises rotating shaft, and this rotating shaft is placed in the axis hole of described point CD.
Preferably, also comprise and cover dish, this covers the rear end that dish is arranged at described point CD, to cover described point of laser that CD sends; The described dish that covers is provided with a light hole, and the mono-colour laser of one of them of described point of CD is by this light hole Emission Lasers extremely described absorption cell.The described dish that covers is the disk be arranged in parallel with described point of CD, and described light hole is corresponding with the mono-colour laser of one of them on described point of CD, and the mono-colour laser corresponding to being changed by the rotation of described point of CD.
Preferably, also comprise condenser lens, described condenser lens is arranged at described point of CD and describedly covers between dish, to guide laser by described light hole by laser focusing.
Preferably, also light-conductive optic fibre is comprised; The laser that described mono-colour laser sends leads to this light-conductive optic fibre of light and is incident to described absorption cell; Described detecting device is incident to by this light-conductive optic fibre by the laser of described absorption cell outgoing.Two ends of described light-conductive optic fibre are provided with optical fiber interface, and described absorption cell, detecting device, mono-colour laser correspondence is provided with the mounting interface matched with this optical fiber interface, to install fixing light-conductive optic fibre.
Preferably, also comprise indicator, described indicator is connected with detecting device, to show data measured by detecting device.
Preferably, mono-colour laser is variable wavelength laser diode, the laser diode that namely wavelength is adjustable among a small circle.
Preferably, described mono-colour laser has 8, and the wavelength of these 8 mono-colour lasers is respectively 380nm, 405nm, 450nm, 550nm, 620nm, 650nm, 700nm, 750nm.Correlation parameter measured by described detecting device is light intensity and the phase place of laser.Turn a point CD by a next round, make on point CD 8 mono-colour lasers expose to described absorption cell respectively by the light hole covered on dish, to measure the one-wavelength laser of respective wavelength by the light intensity change after sample and phase place change.
The beneficial effects of the utility model are:
(1) use mono-colour laser as light source, have high coherence, feature that monochromaticity is strong, and accurately control light source frequency, measure judged result more accurately, and can realize multi-component Simultaneously test to obtain, measuring speed is fast, applied widely;
(2) taken into account luminous flux and measurement sensistivity, light intensity and the light phase that can measure projection front and back poor simultaneously, to obtain measurement result more accurately;
(3) light source sends laser and adopts light-conductive optic fibre to transmit through absorption cell to the process of detecting device to the process of absorption cell and laser, decreases the consume of laser in transmitting procedure, ensure that the measuring accuracy of correlation parameter;
(4) between system, each several part matching relationship is simple, and entire system stability is high.
Below in conjunction with drawings and Examples, the utility model is described in further detail; But a kind of laser spectrophotometer of the present utility model is not limited to embodiment.
Accompanying drawing explanation
Fig. 1 is the spectrophotometric structured flowchart of prior art;
Fig. 2 is spectrophotometric structured flowchart of the present utility model;
Fig. 3 is one-piece construction schematic diagram of the present utility model;
Fig. 4 is the structural representation of mono-colour laser part of the present utility model;
Fig. 5 is the structural representation of light-conductive optic fibre part of the present utility model.
Embodiment
Embodiment
Refer to shown in Fig. 2 to Fig. 5, a kind of laser spectrophotometer of the present utility model, comprising:
Divide CD 1, comprise a plurality of mono-colour laser 11, this plurality of mono-colour laser 11 is circumferentially arranged at intervals at described point CD 1, to divide CD 1 to realize the switching of different mono-colour laser 11 by rotation;
Absorption cell 2, for placing required sample to be measured, described absorption cell 2 is arranged at the rear end of described point CD 1;
Detecting device 3, described detecting device 3 is arranged at the rear end of described absorption cell 2, send laser to make the mono-colour laser 11 of one of them of described point CD 1 and arrive detecting device 3 by absorption cell 2, described detecting device 3 is for detecting the correlation parameter of the laser after by absorption cell 2.
Shown in Fig. 3 and Fig. 4, described point of CD 1 comprises 8 the laser instrument mounting holes 12 along the circumferential direction arranged and the axis hole 13 being arranged at disc centre, and described mono-colour laser 11 correspondence is installed on this laser instrument mounting hole 12; Also comprise rotating shaft (not marking in figure), this rotating shaft is placed in the axis hole 13 of described point CD 1, and described point of CD is rotated by this rotating shaft, to switch between different mono-colour lasers 11.
Further, also comprise and cover dish 5, this covers the rear end that dish 5 is arranged at described point of CD 1, with to described point of CD 1 send laser and cover; The described dish 5 that covers is provided with a light hole 51, and the mono-colour laser 11 of one of them of described point of CD 1 is by this light hole 51 Emission Lasers extremely described absorption cell 2.The described dish 5 that covers is the disk be arranged in parallel with described point of CD 1, and described light hole 51 is corresponding with the mono-colour laser 11 of one of them on described point of CD 1, and the mono-colour laser 11 corresponding to being changed by the rotation of described point of CD 1.
Further, also comprise condenser lens 6, described condenser lens 6 is arranged at described point of CD 1 and describedly covers between dish 5, to guide laser by described light hole 51 by laser focusing.
Further, shown in Figure 5, also comprise light-conductive optic fibre 7; The laser that described mono-colour laser 11 sends leads to this light-conductive optic fibre 7 of light and is incident to described absorption cell 2; Described detecting device 3 is incident to by this light-conductive optic fibre 7 by the laser of described absorption cell 2 outgoing.Two ends of described light-conductive optic fibre 7 are provided with optical fiber interface 71, and described absorption cell 2, detecting device 3, mono-colour laser 11 correspondence are provided with the mounting interface matched with this optical fiber interface 71, to install fixing light-conductive optic fibre 7.
Further, also comprise indicator 4, described indicator 4 is connected with detecting device 3, to show data measured by detecting device 3.
Further, mono-colour laser 11 is variable wavelength laser diode, the laser diode that namely wavelength is adjustable among a small circle.
Further, described mono-colour laser 11 has 8, and the wavelength of these 8 mono-colour lasers 11 is respectively 380nm, 405nm, 450nm, 550nm, 620nm, 650nm, 700nm, 750nm.Correlation parameter measured by described detecting device 3 is light intensity and the phase place of laser.Turn point CD 1 by a next round, make on point CD 18 mono-colour lasers 11 expose to described absorption cell 2 respectively by the light hole 51 covered on dish 5, to measure the one-wavelength laser of respective wavelength by the light intensity change after sample and phase place change.
Above-described embodiment is only used for further illustrating a kind of laser spectrophotometer of the present utility model; but the utility model is not limited to embodiment; every above embodiment is done according to technical spirit of the present utility model any simple modification, equivalent variations and modification, all fall in the protection domain of technical solutions of the utility model.
Claims (9)
1. a laser spectrophotometer, is characterized in that, comprising:
Divide CD, comprise a plurality of mono-colour laser, this plurality of mono-colour laser is circumferentially arranged at intervals at described point CD, to realize the switching of different mono-colour laser by rotating point CD;
Absorption cell, for placing required sample to be measured, described absorption cell is arranged at the rear end of described point CD;
Detecting device, described detecting device is arranged at the rear end of described absorption cell, and send laser to make the mono-colour laser of one of them of described point CD and arrive detecting device by absorption cell, described detecting device is for detecting the correlation parameter of the laser after by absorption cell.
2. a kind of laser spectrophotometer according to claim 1, is characterized in that: also comprise and cover dish, and this covers the rear end that dish is arranged at described point CD, to cover described point of laser that CD sends; The described dish that covers is provided with a light hole, and the mono-colour laser of one of them of described point of CD is by this light hole Emission Lasers extremely described absorption cell.
3. a kind of laser spectrophotometer according to claim 2, is characterized in that: also comprise condenser lens, and described condenser lens is arranged at described point of CD and describedly covers between dish, to guide laser by described light hole by laser focusing.
4. a kind of laser spectrophotometer according to claim 2, is characterized in that: also comprise light-conductive optic fibre; The laser that described mono-colour laser sends leads to this light-conductive optic fibre of light and is incident to described absorption cell; Described detecting device is incident to by this light-conductive optic fibre by the laser of described absorption cell outgoing.
5. a kind of laser spectrophotometer according to claim 1, is characterized in that: also comprise indicator, and described indicator is connected with detecting device, to show data measured by detecting device.
6. a kind of laser spectrophotometer according to claim 1, is characterized in that: mono-colour laser is variable wavelength laser diode.
7. a kind of laser spectrophotometer according to claim 1, is characterized in that: described mono-colour laser has 8.
8. a kind of laser spectrophotometer according to claim 7, is characterized in that: the wavelength of described 8 mono-colour lasers is respectively 380nm, 405nm, 450nm, 550nm, 620nm, 650nm, 700nm, 750nm.
9. a kind of laser spectrophotometer according to claim 1, is characterized in that: the correlation parameter measured by described detecting device is light intensity and the phase place of laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520787857.2U CN205120576U (en) | 2015-10-13 | 2015-10-13 | Laser spectrophotometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520787857.2U CN205120576U (en) | 2015-10-13 | 2015-10-13 | Laser spectrophotometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205120576U true CN205120576U (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520787857.2U Active CN205120576U (en) | 2015-10-13 | 2015-10-13 | Laser spectrophotometer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203484A (en) * | 2015-10-13 | 2015-12-30 | 华侨大学 | Laser spectrophotometer |
| CN112730280A (en) * | 2020-11-26 | 2021-04-30 | 中国科学院深圳先进技术研究院 | Biochemical detection equipment |
-
2015
- 2015-10-13 CN CN201520787857.2U patent/CN205120576U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203484A (en) * | 2015-10-13 | 2015-12-30 | 华侨大学 | Laser spectrophotometer |
| CN112730280A (en) * | 2020-11-26 | 2021-04-30 | 中国科学院深圳先进技术研究院 | Biochemical detection equipment |
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