CN111103247A - Ultraviolet-visible spectrophotometer - Google Patents
Ultraviolet-visible spectrophotometer Download PDFInfo
- Publication number
- CN111103247A CN111103247A CN201911275700.0A CN201911275700A CN111103247A CN 111103247 A CN111103247 A CN 111103247A CN 201911275700 A CN201911275700 A CN 201911275700A CN 111103247 A CN111103247 A CN 111103247A
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- China
- Prior art keywords
- light
- collimating mirror
- light source
- integrating sphere
- optical fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000000870 ultraviolet spectroscopy Methods 0.000 title claims abstract description 15
- 239000013307 optical fiber Substances 0.000 claims abstract description 18
- 238000004458 analytical method Methods 0.000 claims abstract description 6
- 238000001228 spectrum Methods 0.000 claims description 7
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 229910052805 deuterium Inorganic materials 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 229910052736 halogen Inorganic materials 0.000 claims description 6
- 150000002367 halogens Chemical class 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000002835 absorbance Methods 0.000 abstract description 11
- 238000001514 detection method Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 6
- 239000007787 solid Substances 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 abstract description 4
- 239000000523 sample Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 12
- 239000000126 substance Substances 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000011481 absorbance measurement Methods 0.000 description 4
- 238000000862 absorption spectrum Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012488 sample solution Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000000274 adsorptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000011410 subtraction method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
Abstract
The invention provides an ultraviolet-visible spectrophotometer which comprises a light source, a lens, an optical fiber, a collimating mirror, a shading cap, an integrating sphere and a spectrometer, wherein the light emitting wavelength of the light source is within a range of 200nm-1000nm, light emitted by the light source is transmitted into the spectrometer from one end of the optical fiber after passing through the lens, the other end of the optical fiber is provided with the collimating mirror, the shading cap is arranged between the collimating mirror and a sample to be measured, the light is transmitted through the optical fiber and then parallelly emitted out of the collimating mirror and transmitted into the sample to be measured, and the light is received by the integrating sphere and transmitted to the spectrometer for analysis after being emitted out of the sample to be. The invention can measure the absorbance of solid and liquid samples, the shading cap can reduce the influence of ambient light on the instrument, the whole-course sealing of the light path is not needed during the detection, the external light has no influence on the instrument, the use is convenient, and the data is stable and accurate. Any wave band or all wave bands can be analyzed, and through tests, the integral measurement time of the invention is less than 1.5s, and the measurement speed is high.
Description
Technical Field
The invention relates to the field of spectrophotometers, in particular to an ultraviolet-visible spectrophotometer.
Background
The ultraviolet-visible spectrophotometry is a method for determining the absorbance of a substance within a wavelength range of 200-760 mn, and is used for identification, impurity detection and quantitative determination. When light passes through a substance to be measured, the degree of absorption of light by the substance varies depending on the wavelength of the light. Therefore, the absorption spectrum of the measured substance is obtained by measuring the absorbance of the substance at different wavelengths and drawing a relation graph of the absorbance and the wavelength. From the absorption spectrum, the maximum absorption wavelength λ max and the minimum absorption wavelength λ min can be determined. The absorption spectrum of a substance has characteristics related to its structure. Thus, substances can be identified by comparing the spectrum of a sample in a particular wavelength range with a control spectrum or a control spectrum, or by determining the wavelength of maximum absorption, or by measuring the ratio of the absorption at two particular wavelengths. When the method is used for quantification, the absorbance of a sample solution with a certain concentration is measured at the maximum absorption wavelength, and is compared with the absorbance of a control solution with a certain concentration or the concentration of the sample solution is calculated by adopting an absorption coefficient method.
The ultraviolet visible spectrophotometer comprises a single beam UV, a proportional double beam UV, a double beam UV and a full-wave band UV, wherein the single beam UV is the most traditional ultraviolet spectrophotometer, a single light source emits a single beam, the whole process is closed, a sample is irradiated through a grating, and finally the sample is detected by a photomultiplier monitor. The proportional double-beam UV is a single light source single beam, is sealed in the whole process, passes through a grating, is added into a prism, divides the light into two beams, respectively irradiates a sample and a blank, combines the light, enters a photomultiplier detector, and calculates the result through a differential subtraction method. The double light beams UV are single light source and single light beam, are sealed in the whole process, are divided into two light beams through the prism, and respectively enter the respective photomultiplier detectors through the gratings. Full-band UV is a single light source, single beam, sample and blank are exposed to air, illuminating the sample, starting to enter the enclosure, through the grating, and into the DAD detector.
In recent years, there has been an increasing demand for testing solids for reflectivity and absorbance, including the detection of semiconductors, films, glass, and other adsorptive solid materials. The existing ultraviolet-visible spectrophotometer mainly aims at absorbance detection of a liquid sample to be detected, whole-course sealing is needed during detection, and the whole-band analysis time of a single sample is long and generally needs 2 minutes.
Disclosure of Invention
The invention provides an ultraviolet-visible spectrophotometer for overcoming the defects that a sample to be detected can only be liquid and needs to be sealed in the whole process during detection in the prior art, and the ultraviolet-visible spectrophotometer can be used for measuring the absorbance of a solid sample and a liquid sample and does not need to seal the whole process of a light path.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides an ultraviolet visible spectrophotometer, includes light source, lens, optic fibre, collimating mirror, shading cap, integrating sphere and spectrum appearance, light source luminous wavelength is at 200nm-1000nm interval, the one end of following optic fibre after the light source sends passes through the lens is kicked in, and the other end of optic fibre is equipped with the collimating mirror, the shading cap sets up in the collimating mirror outside, and the light is through after optical fiber transmission from the collimating mirror parallel jet out and kicked in the sample that awaits measuring, and the light is received the light and is transmitted the spectrum appearance by the integrating sphere and carry out the analysis after the sample that awaits measuring jets out.
Preferably, the light source comprises a halogen lamp and a deuterium lamp, the light emitting wavelength range of the halogen lamp is 380-1000nm, and the visible light absorbance measurement of the wavelength of 400-760nm is supported, and the light emitting wavelength range of the deuterium lamp is 200-380nm, and the ultraviolet light absorbance measurement of the wavelength of 200-400nm is supported.
Preferably, a diffuse reflection coating is arranged on the inner wall of the integrating sphere, and light entering the integrating sphere is reflected for multiple times through the diffuse reflection coating on the inner wall to form uniform illumination on the inner wall. Light is collected by the integrating sphere through the sampling port, is scattered inside the integrating sphere uniformly after being reflected for multiple times inside the integrating sphere, and when the integrating sphere is used for measuring luminous flux, the measuring result is more reliable.
Preferably, the collimating mirror is a transmission type collimating mirror. Transmissive collimating mirrors are used in beam delivery systems to maintain beam collimation between the laser resonator and the focusing optics, which results in parallel spots.
Preferably, the uv-vis spectrophotometer further comprises a support for supporting the light source, lens, optical fiber, collimating mirror, integrating sphere and spectrometer.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that: the invention provides an ultraviolet-visible spectrophotometer which comprises a light source, a lens, an optical fiber, a collimating mirror, a shading cap, an integrating sphere and a spectrometer, wherein the light emitting wavelength of the light source is within a range of 200nm-1000nm, light emitted by the light source is transmitted into the spectrometer from one end of the optical fiber after passing through the lens, the other end of the optical fiber is provided with the collimating mirror, the shading cap is arranged between the collimating mirror and a sample to be measured, the light is transmitted through the optical fiber and then parallelly emitted out of the collimating mirror and transmitted into the sample to be measured, and the light is received by the integrating sphere and transmitted to the spectrometer for analysis after being emitted out of the sample to be. The invention can measure the absorbance of solid and liquid samples, the shading cap can reduce the influence of ambient light on the instrument, the whole-course sealing of the light path is not needed during the detection, the external light has no influence on the instrument, the use is convenient, and the data is stable and accurate. Any wave band or all wave bands can be analyzed, and through tests, the integral measurement time of the invention is less than 1.5s, and the measurement speed is high.
Drawings
FIG. 1 is a schematic view of an ultraviolet-visible spectrophotometer in accordance with the present invention.
FIG. 2 is a schematic view of another viewing angle of the UV-Vis spectrophotometer according to the present invention.
Wherein: 1. a light source; 2. a lens; 3. an optical fiber; 4. a light-shielding cap; 5. an integrating sphere; 6. a spectrometer.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1-2, an ultraviolet-visible spectrophotometer includes a light source 1, a lens 2, an optical fiber 3, a collimating mirror, a light shielding cap 4, an integrating sphere 5 and a spectrometer 6, wherein the light emitting wavelength of the light source 1 is within the interval of 200nm-1000nm, the light emitted by the light source 1 is emitted from one end of the optical fiber 3 after passing through the lens 2, the collimating mirror is arranged at the other end of the optical fiber 3, the light shielding cap 4 is arranged outside the collimating mirror, the light is emitted from the collimating mirror in parallel after being transmitted through the optical fiber 3 and is emitted into a sample to be measured, and the light is received by the integrating sphere 5 and is transmitted to the spectrometer 6 for analysis after being emitted from the sample to be measured.
In the specific implementation process, the light source 1 comprises a halogen lamp and a deuterium lamp, the light-emitting wavelength range of the halogen lamp is 380-1000nm, the visible light absorbance measurement of the wavelength of 400-760nm is supported, and the light-emitting wavelength range of the deuterium lamp is 200-380nm, the ultraviolet light absorbance measurement of the wavelength of 200-400nm is supported.
In the specific implementation process, the inner wall of the integrating sphere 5 is provided with a diffuse reflection coating, and light entering the integrating sphere 5 is reflected for multiple times through the diffuse reflection coating on the inner wall to form uniform illumination on the inner wall. Light is collected by the integrating sphere through the sampling port, is scattered inside the integrating sphere 5 uniformly after being reflected for multiple times inside the integrating sphere 5, and when the integrating sphere 5 is used for measuring luminous flux, the measuring result is more reliable.
In a specific implementation process, the collimating mirror is a transmission type collimating mirror. Transmissive collimating mirrors are used in beam delivery systems to maintain beam collimation between the laser resonator and the focusing optics, which results in parallel spots.
In a specific implementation process, the ultraviolet-visible spectrophotometer further comprises a support for supporting the light source 1, the lens 2, the optical fiber 3, the collimating mirror, the integrating sphere 5 and the spectrometer 6.
The invention can measure the absorbance of solid and liquid samples, the shading cap 4 can reduce the influence of ambient light on the instrument, the whole-course sealing of the light path is not needed during the detection, the external light has no influence on the instrument, the use is convenient, and the data is stable and accurate. Any wave band or all wave bands can be analyzed, and through tests, the integral measurement time of the invention is less than 1.5s, and the measurement speed is high.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (5)
1. The utility model provides an ultraviolet visible spectrophotometer, its characterized in that, includes light source, lens, optic fibre, collimating mirror, shading cap, integrating sphere and spectrum appearance, light source luminous wavelength is within 200nm-1000nm interval, the light that the light source sent jets into from the one end of optic fibre after through the lens, and the other end of optic fibre is equipped with the collimating mirror, the shading cap sets up in the collimating mirror outside, and the light jets into the sample that awaits measuring from the collimating mirror parallel after passing through optical fiber transmission, and the light is received the light and is transmitted the spectrum appearance and carry out the analysis by the integrating sphere after the sample that awaits measuring jets out.
2. The UV-VIS spectrophotometer according to claim 1, wherein the light source comprises a halogen lamp and a deuterium lamp, the halogen lamp has an emission wavelength range of 380-1000nm, and the deuterium lamp has an emission wavelength range of 200-380 nm.
3. The uv-vis spectrophotometer according to claim 1, wherein the inner wall of the integrating sphere is provided with a diffuse reflection coating, and light entering the integrating sphere is reflected a plurality of times by the diffuse reflection coating of the inner wall to provide uniform illuminance on the inner wall.
4. The uv-vis spectrophotometer of claim 1, wherein the collimator is a transmissive collimator.
5. The uv-vis spectrophotometer according to claim 1, further comprising a support for supporting the light source, lens, optical fiber, collimating mirror, integrating sphere, and spectrometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911275700.0A CN111103247A (en) | 2019-12-12 | 2019-12-12 | Ultraviolet-visible spectrophotometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911275700.0A CN111103247A (en) | 2019-12-12 | 2019-12-12 | Ultraviolet-visible spectrophotometer |
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| Publication Number | Publication Date |
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| CN111103247A true CN111103247A (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911275700.0A Pending CN111103247A (en) | 2019-12-12 | 2019-12-12 | Ultraviolet-visible spectrophotometer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014319A (en) * | 2020-08-26 | 2020-12-01 | 中山大学新华学院 | Detector for dynamically detecting influence of illumination on ultraviolet absorbance of substance |
| CN113752702A (en) * | 2021-10-13 | 2021-12-07 | 合肥京东方卓印科技有限公司 | Ink jet printing nozzle, cleaning method thereof and ink jet printing device |
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2019
- 2019-12-12 CN CN201911275700.0A patent/CN111103247A/en active Pending
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| CN113752702A (en) * | 2021-10-13 | 2021-12-07 | 合肥京东方卓印科技有限公司 | Ink jet printing nozzle, cleaning method thereof and ink jet printing device |
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