CN204964366U - Spectrophotometer based on leaded light capillary - Google Patents
Spectrophotometer based on leaded light capillary Download PDFInfo
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- CN204964366U CN204964366U CN201520565761.1U CN201520565761U CN204964366U CN 204964366 U CN204964366 U CN 204964366U CN 201520565761 U CN201520565761 U CN 201520565761U CN 204964366 U CN204964366 U CN 204964366U
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Abstract
The utility model provides a spectrophotometer based on leaded light capillary, including light source, spectrometer, leaded light capillary, photoelectric detector and liquid actuating system, characterized by: utilizing large aperture leaded light capillary, surveying light beam direct injection leaded light capillary, light detector receives and follows the light beam that jets out in the leaded light capillary, adopt the liquid driving method based on the poor principle of liquid level, the need checking sample leaded light capillary of flowing through under the action of gravity. Compare with current leaded light capillary photometer, adopt the large aperture capillary can leave out fiber optic coupling step and mechanical pump actuating system to reduce cost, elimination mechanical oscillation noise, improvement detect the precision.
Description
Technical field
The utility model relates to a kind of spectrophotometer, particularly a kind of spectrophotometer based on light-conducting capillaries, can be used for absorbance and photoluminescence (fluorescence) test of liquids and gases sample.
Background technology
Absorbance is important material characteristic parameter, and the absorbance of test sample can know the information such as the composition of sample and concentration.Therefore, based on the spectrophotometer of absorbance detection, biochemical analysis field is widely used in.For spectrophotometer, need testing sample to be placed in cuvette, carry out contrast test (SensorsandActuatorsB, 191,561-566 (2014)).In order to improve measuring accuracy, need the thickness (namely increasing the absorption length of sample to detection light) increasing cuvette, this can increase volume and the sample requirements of cuvette.For this reason, people have invented light-conducting capillaries photometer (US Patent No. 5,507,447, Chinese Patent Application No. 201510009828.8), and testing sample and detection light are all through capillary transportation.Because kapillary volume is little, flexible, therefore significantly can improve extinction distance, improve accuracy of detection (or detection limit), also there is the few feature of sample requirements simultaneously.
Because the aperture of light-conducting capillaries is less, substantially adopt coupling fiber at present, namely adopt optical fiber will detect light and import in kapillary.Therefore, need light beam coupling to enter optical fiber, optical fiber aims at complexity with intercapillary connection, and optical power loss is larger.In addition, because the internal diameter of kapillary is very little, usually need mechanical pump to drive liquid, therefore large, the poor stability of volume.
Therefore the kapillary spectrophotometer that design research and development are new, simplifying test macro and improve instrument performance, is that wound of the present utility model grinds motivation.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of efficient light beam coupling mode and liquid driven mode easily, can reduce the photometric volume of kapillary, reduce costs and improve detection perform.
In order to solve the problems of the technologies described above, the technical solution of the utility model is:
A kind of spectrophotometer based on light-conducting capillaries (as Fig. 1), comprise light source, optical splitter, light-conducting capillaries, photodetector and liquid driven system, it is characterized in that: utilize large aperture light-conducting capillaries, reduce light beam coupling difficulty, detecting light beam directly can inject light-conducting capillaries; Adopt the liquid driven system based on liquid-level difference principle, under gravity, the liquid level difference between sample bottle and waste liquid bottle can drive testing sample to flow through light-conducting capillaries.
The spectrophotometer based on light-conducting capillaries that the utility model relates to, has following attached technical characteristic:
Described light source can be broad spectrum light source (as halogen tungsten lamp, xenon tungsten lamp), the optical wavelength of institute's radiation can cover ultraviolet, visible and infrared band one of them or appoint several.Described light source also can with being monochromatic source (as laser instrument or light emitting diode), the light source that namely wave spread is very narrow.
Described optical splitter can be prism, grating or photonic crystal, for the light beam of radiation of light source is separated by wavelength, thus the wavelength required for selecting.When adopting monochromatic source, optical splitter can be omitted.
Between described light source and optical splitter, can with lens by the beams converge of radiation of light source on optical splitter, optical fiber also can be utilized to be directed on optical splitter by the light beam of radiation of light source.This optical fiber can be ordinary optic fibre, with lensed optical fiber, optical fiber, tapered fiber or photonic crystal fiber with collimating apparatus.
Between described optical splitter and light-conducting capillaries, because the aperture of kapillary is comparatively large, light beam can direct coupled light, namely can shine directly into kapillary end face by the light beam of optical splitter, and be coupled into kapillary.Contrast therewith, traditional light-conducting capillaries photometer, due to aperture very little (being less than 0.15 millimeter), in order to obtain higher light beam coupling efficiency, need accurate aligning between incident beam with kapillary, therefore need optical fiber to dock with kapillary, but not adopt light beam directly incident.
Described kapillary, optical splitter and light source, can by rotate or mobile one of them or several arbitrarily, make the light beam coupling of different wave length enter into kapillary.Thus the test of sample absorbance under realizing different wave length.
Described light-conducting capillaries, its aperture is selected to be greater than 0.1 millimeter, and preferred aperture is greater than 1.0 millimeters.Large aperture is conducive to light beam and directly injects kapillary (eliminating traditional coupling fiber mode), reduces the coupling loss of light beam, thus improves accuracy of detection; Further, large aperture reduces the resistance of liquid flow, thus liquid level difference mode can be adopted to drive liquid flow.
Described light-conducting capillaries, one or several arbitrarily in transparent glass bar, glass bead, glass cone, sticking plaster, baton round and plastics cone can be filled in kapillary, to reduce the internal volume of kapillary, thus reduce sample requirements, raising sample switch speed.
Described photo-detector can be single photo-detector, also can be the array be made up of multiple photo-detector.
Described liquid level difference drives, and namely the liquid level of sample bottle is higher than the liquid level (as Fig. 1, liquid level difference is H) of waste liquid bottle, and liquid flows to waste liquid bottle from sample bottle under gravity, thus flows through kapillary.Compared with traditional driven by mechanical pump mode, owing to eliminating mechanical pump, there is the advantage that volume is little, cost is low, and eliminate the mechanical vibration that mechanical pump brings, reduce test noise.
The spectrophotometer based on light-conducting capillaries that the utility model relates to, also may be used for the photoluminescence testing sample, and namely the light beam excitation testing sample of radiation of light source, makes testing sample luminescence (testing sample radiofluorescence).By detecting wavelength and the intensity of fluorescence, the component concentration of testing sample can be known.
Compared with existing light-conducting capillaries photometer, the utility model has the following advantages:
Adopt large aperture light-conducting capillaries, light beam can directly enter to inject kapillary, eliminates the complex steps of coupling fiber; Large aperture light-conducting capillaries, reduces the resistance of liquid flow, thus can adopt liquid level difference drive fluid, eliminates mechanical pump, eliminates mechanical vibration noise, improves accuracy of detection.
Accompanying drawing explanation
Fig. 1 is the first structural representation spectrophotometric based on light-conducting capillaries.
1-light source; 2-lens; 3-optical splitter; 4-sample bottle; 5-conduit; 6-light-conducting capillaries aperture; 7-light-conducting capillaries; 8-sealing cap; 9-waste liquid bottle; 10-photo-detector.
Fig. 2 is the spectrophotometric the second structural representation based on light-conducting capillaries.
1-light source; 2-optical fiber; 3-optical splitter; 4-sample bottle; 5-conduit; 6-light-conducting capillaries aperture; 7-light-conducting capillaries; 8-sealing cap; 9-waste liquid bottle; 10-photo-detector.
Fig. 3 is the third structural representation spectrophotometric based on light-conducting capillaries.
1-light source; 2-optical fiber; 3-optical splitter; 4-sample bottle; 5-conduit; 6-light-conducting capillaries aperture; 7-light-conducting capillaries; 8-sealing cap; 9-waste liquid bottle; 10-photodetector array.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in detail, it is pointed out that described embodiment is only intended to be convenient to understanding of the present utility model, and any restriction effect is not play to it.
Embodiment 1
As shown in Figure 1, a kind of spectrophotometer based on light-conducting capillaries, comprises halogen tungsten lamp 1, optical lens 2, prismatic decomposition device 3, light-conducting capillaries 7, photo-detector 10.The light beam that described halogen tungsten lamp 1 is launched, incides on prism 3 after lens 2 focus on, and the end face that the light beam after prismatic decomposition shines directly into kapillary 7 is coupled into kapillary, by the light beam of kapillary finally by photoelectric detector.Described sample bottle 4 is different from the liquid level of waste liquid bottle 9, and its liquid level difference is H.Liquid level difference drives fluid sample to flow into kapillary 7 through conduit 5, then flows into waste liquid bottle through conduit.Sealing cap is used for preventing fluid leakage.Described light-conducting capillaries 7, its internal diameter R is 0.2 millimeter, has high light beam coupling efficiency, and little liquid flowing resistance.
Wherein, by mobile kapillary 7, prism 3, lens 2 and halogen tungsten lamp 1 or appoint several, make the light beam coupling of different wave length enter into kapillary.Thus the test of sample absorbance under realizing different wave length, namely know the relation between absorbance and wavelength.
Embodiment 2
As shown in Figure 2, a kind of spectrophotometer based on light-conducting capillaries, comprises xenon tungsten lamp 1, with the optical fiber 2 of collimating apparatus (or lens), and grating beam splitting device 3, light-conducting capillaries 7, photo-detector 10.The light beam that described xenon tungsten lamp 1 is launched, incide on grating 3 through optical fiber 2 with the form of parallel beam, the end face that light beam after grating beam splitting shines directly into kapillary 7 is coupled into kapillary, by the light beam of kapillary 7 finally receive by photodetector 10.Described sample bottle 4 is different from the liquid level of waste liquid bottle 9, and its liquid level difference is H.Liquid level difference drives fluid sample to flow into kapillary 7 through conduit 5, then flows into waste liquid bottle through conduit.Sealing cap is used for preventing fluid leakage.Described metal capillary 7, its internal diameter R is 1.8 millimeters, and this aperture much larger than traditional light-conducting capillaries (about 0.1 millimeter, aperture), thus adds light beam coupling efficiency, reduces the difficulty be coupled and aligned, and reduces liquid flowing resistance.
Wherein, by rotate in kapillary 7, grating 3, optical fiber 2 and xenon tungsten lamp 1 one or appoint several, the light beam coupling of different wave length is made to enter into kapillary.Thus the test of sample absorbance under realizing different wave length, namely know the relation between absorbance and wavelength.
Embodiment 3
As shown in Figure 3, a kind of spectrophotometer based on light-conducting capillaries, comprises xenon tungsten lamp 1, optical fiber 2, grating beam splitting device 3, light-conducting capillaries 7, photo-detector 10.The light beam that described xenon tungsten lamp 1 is launched, the end face being irradiated to kapillary 7 through optical fiber 2 is coupled into kapillary 7, by the light beam of kapillary 7 after grating beam splitting device 3 light splitting, is finally received by photodetector array 10.Described sample bottle 4 is different from the liquid level of waste liquid bottle 9, and its liquid level difference is H.Liquid level difference drives fluid sample to flow into kapillary 7 through conduit 5, then flows into waste liquid bottle through conduit.Sealing cap is used for preventing fluid leakage.Described metal capillary 7, its internal diameter R is 1.8 millimeters, and this aperture much larger than traditional light-conducting capillaries (about 0.1 millimeter, aperture), thus adds light beam coupling efficiency, and reduces liquid flowing resistance.
In the present embodiment, although adopt optical fiber 2 detection to be coupled light in light-conducting capillaries 7, due to kapillary aperture (1.8 millimeters) much larger than optical fiber fibre core directly (being usually less than 0.6 millimeter); Therefore, without the need to accurate aligning, the light beam of optical fiber injection is easy to be coupled into kapillary.
In the present embodiment, grating beam splitting device 3 is placed between kapillary 7 and photodetector array 10, by the light beam of kapillary 7 after grating 3 light splitting, receive by photodetector array 10.Now, grating 3 and the combination of photodetector array 10, play the function of spectrometer; Therefore without the need to rotatable parts, the test of sample absorbance under different wave length can be realized.
The light-conducting capillaries of any shape in the utility model, detection light can transmit in kapillary, and particularly point out, the shape of the utility model kapillary is not limited to straight, can be any bending shape, such as, one in annular, arc, spirality.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not the restriction to the utility model protection domain; although done to explain to the utility model with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical solution of the utility model or equivalent replacement, and not depart from essence and the scope of technical solutions of the utility model.
Claims (10)
1. the spectrophotometer based on light-conducting capillaries, comprise light source, optical splitter, light-conducting capillaries, photo-detector and liquid driven system, it is characterized in that: utilize large aperture light-conducting capillaries, detecting light beam directly enters to inject light-conducting capillaries, and photo-detector receives the light beam penetrated from light-conducting capillaries; Adopt the liquid driven mode based on liquid-level difference principle, testing sample flows through light-conducting capillaries under gravity.
2. a kind of spectrophotometer based on light-conducting capillaries according to claim 1, is characterized in that: the aperture of described light-conducting capillaries is greater than 0.1 millimeter.
3. a kind of spectrophotometer based on light-conducting capillaries according to claim 1, it is characterized in that: the radiation laser beam of described light source is successively through lens, optical fiber and optical splitter one of them or two, then be directly incident on light-conducting capillaries end face, and be coupled into light-conducting capillaries.
4. a kind of spectrophotometer based on light-conducting capillaries according to claim 1, is characterized in that: the radiation laser beam of described light source by light-conducting capillaries and optical splitter one of them or two, then enters photo-detector successively.
5., according to the arbitrary described a kind of spectrophotometer based on light-conducting capillaries of claim 1 or 4, it is characterized in that: described photo-detector is single detector or detector array.
6. a kind of spectrophotometer based on light-conducting capillaries according to claim 3, is characterized in that: described optical fiber is ordinary optic fibre, with lensed optical fiber, optical fiber, tapered fiber or photonic crystal fiber with collimating apparatus.
7., according to the arbitrary described a kind of spectrophotometer based on light-conducting capillaries of claim 1,3 or 4, it is characterized in that: described optical splitter adopts prism, grating or photonic crystal to be separated by wavelength by radiation of light source light.
8. a kind of spectrophotometer based on light-conducting capillaries according to claim 1, it is characterized in that: by rotating or moving or several arbitrarily in described light-conducting capillaries, described optical splitter and described light source, make the light beam of different wave length enter into light-conducting capillaries.
9. a kind of spectrophotometer based on light-conducting capillaries according to claim 1, is characterized in that: described liquid driven mode utilizes the liquid level difference between sample bottle and waste liquid bottle to flow through light-conducting capillaries to drive testing sample.
10. according to the arbitrary described a kind of spectrophotometer based on light-conducting capillaries of claim 1 or 2, it is characterized in that: described light-conducting capillaries passes through in light-conducting capillaries, to fill or several arbitrarily in transparent glass bar, glass bead, glass cone, sticking plaster, baton round and plastics cone, to reduce the internal volume of light-conducting capillaries.
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| CN201520565761.1U CN204964366U (en) | 2015-07-28 | 2015-07-28 | Spectrophotometer based on leaded light capillary |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424633A (en) * | 2016-01-19 | 2016-03-23 | 东北农业大学 | Capillary-type optical path-adjustable spectrophotometer absorption cell suitable for veterinary molecule detection |
| CN110208191A (en) * | 2019-05-24 | 2019-09-06 | 深圳市前海微升科学股份有限公司 | A kind of light path analyzing detecting method and device |
| CN112414959A (en) * | 2020-11-10 | 2021-02-26 | 大连理工大学 | Small-sized high-sensitivity spectrophotometer |
-
2015
- 2015-07-28 CN CN201520565761.1U patent/CN204964366U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424633A (en) * | 2016-01-19 | 2016-03-23 | 东北农业大学 | Capillary-type optical path-adjustable spectrophotometer absorption cell suitable for veterinary molecule detection |
| CN105424633B (en) * | 2016-01-19 | 2017-11-28 | 东北农业大学 | Suitable for the adjustable optical path spectrophotometer absorption cell of capillary type of animal doctor's Molecular Detection |
| CN110208191A (en) * | 2019-05-24 | 2019-09-06 | 深圳市前海微升科学股份有限公司 | A kind of light path analyzing detecting method and device |
| CN112414959A (en) * | 2020-11-10 | 2021-02-26 | 大连理工大学 | Small-sized high-sensitivity spectrophotometer |
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