CN104614071A - Miniature optical path structure of spectrophotometer and application method thereof - Google Patents
Miniature optical path structure of spectrophotometer and application method thereof Download PDFInfo
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- CN104614071A CN104614071A CN201410750557.7A CN201410750557A CN104614071A CN 104614071 A CN104614071 A CN 104614071A CN 201410750557 A CN201410750557 A CN 201410750557A CN 104614071 A CN104614071 A CN 104614071A
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Abstract
The invention belongs to the technical field of spectrophotometer, and specifically relates to a miniature optical path structure of spectrophotometer and an application method thereof; a cuvette tank component is arranged on a cuvette base; an optical filter component and an optical focus component are respectively arranged on two ends of the cuvette base; an optical path for detecting cuvette sample information on the cuvette tank component is formed above the optical filter component, the optical focus component, the cuvette tank component and the cuvette base; the method comprises the following steps: a sample is placed in the cuvette tank component; in a space of 100-800cm3, an optical signal, formed by a point light source sequentially passes through optical path purification and optical path collimation of the optical filter component, the sample in the cuvette tank component, and the optical path focus of the optical focus component, is sent to a detector or the inlet of the detector. Based on the law of conservation of energy, the miniature optical path structure of spectrophotometer optimizes the optical path structure, effectively reduces the loss of optical energy, increases the sensitivity of analysis as well as saves the manufacturing cost of the instrument.
Description
Technical field
The invention belongs to spectrophotometric technique field, refer in particular to a kind of spectrophotometric miniaturization light channel structure and application process thereof.
Background technology
Spectrophotometer is a kind of absorbance log by measuring measured matter light in certain wave strong point or a wavelength range; this material is carried out to the detecting instrument of qualitative and quantitative analysis, be widely used in the fields such as food security, environmental protection, pharmacy, health, the energy, chemical industry.Effective utilization of its luminous energy of optical instrument is the guarantee of instrument performance excellence.
Existing spectrophotometer design is comparatively complicated, for the light channel structure of UV1900 (see Fig. 1), in figure: W1: halogen tungsten lamp; D2: tritium lamp; F: color filter; L1, L2: lens; M1, M3, M4, M6, M8, M9: spherical mirror; M5: plane mirror; M7: semi-transparent semi-reflecting lens; M10, M11: protective glass; G: grating; PD1, PD2: photoelectric cell; S1: entrance slit; S2: exit slit; C1, C2: colorimetric pool frame.As shown in Figure 1, need a large amount of catoptrons, focus lamp, level crossing to coordinate in the light channel structure of UV1900, therefore energy loss is also large, and owing to needing to manufacture certain light path, therefore instrument volume is also larger.This spectrophotometer, when regulating light path, often needs special utility appliance, and higher to the technical requirement of assembler, causes production efficiency low.In addition, later maintenance is also comparatively loaded down with trivial details, often goes wrong in light path, and instrument needs the maintenance of direct return-to-factory, causes to complete related work at the scene, affects the work efficiency of user.
Cell rack is a critical component in spectrophotometer, the cell rack of the product such as 756 single beam spectrophotometers on the market and UV1900 double beam spectrophotometer only plays the effect of mobile handoff and fixing cuvette for a long time, and the performance for the light path system of whole instrument improves and directly do not help.
Summary of the invention
The object of this invention is to provide one to be combined more closely with optics, enormously simplify light channel structure, reduce the loss of luminous energy, improve spectrophotometric miniaturization light channel structure and the application process thereof of the sensitivity for analysis of instrument.
The object of the present invention is achieved like this:
A kind of spectrophotometric miniaturization light channel structure, comprise cuvette pedestal, light filter assemblies, light focus pack and cuvette bowl assembly, light filter assemblies mounting hole and light focus pack mounting hole is respectively arranged with at the two ends of cuvette pedestal, described cuvette bowl assembly is arranged on cuvette pedestal, on the light filter assemblies mounting hole that light filter assemblies and light focus pack are separately positioned on cuvette pedestal two ends and light focus pack mounting hole, at light filter assemblies, light focus pack, cuvette bowl assembly, cuvette pedestal is formed with the light path for detecting the cuvette sample message on cuvette bowl assembly.
Above-mentioned cuvette bowl assembly is removably disposed on the middle part of cuvette pedestal.
Above-mentioned removably setting is: at the middle part of cuvette pedestal to being arranged with groove, and cuvette bowl assembly is arranged in the groove of cuvette pedestal, and the size of groove and the size of cuvette bowl assembly match;
Or at the middle part of cuvette pedestal to being arranged with groove, cuvette bowl assembly is arranged in the groove of cuvette pedestal by screw.
Above-mentioned cuvette bowl assembly is made up of the fixed block that two pieces are arranged side by side, the middle part of both sides adjacent on fixed block is respectively arranged with open slot, two open slots merging are combined to form the pickup groove being used for fixing cuvette, both sides adjacent on two fixed blocks are respectively arranged with the long open slot arranged along its length, two long open slots merging are combined to form through hole, the axis of the center line of through hole, the center line of pickup groove, light filter assemblies mounting hole and the axis collinear of light focus pack mounting hole.
The cross section of above-mentioned pickup groove is square or circular, and the width of the pickup groove of square-section is 1-5cm; Or the diameter of the pickup groove of round section is 1-5cm.
Above-mentioned light filter assemblies comprises filtering bench, filtering bench is provided with ladder mesopore, collimating mirror is provided with in one end of ladder mesopore, collimating mirror is spirally connected fixing by photoconduction cylinder and filtering bench, the other end is screwed onto by filter plug screw and filtering bench injects angle along light source was installed with filter catch successively, optical filter and excessively filter catch, the outer end of described photoconduction cylinder is positioned at outside filtering bench for being connected with light source, the outer face of photoconduction cylinder is provided with the unthreaded hole with ladder mesopore coaxial cable, the other end of filtering bench is arranged in the filter assemblies mounting hole of cuvette pedestal light.
Above-mentioned filter assemblies mounting hole is threaded hole, and the other end of filtering bench is outside equipped with external thread, and the other end of filtering bench is screwed onto in filter assemblies mounting hole, the ladder mesopore axis collinear on filter assemblies mounting hole, unthreaded hole, filtering bench.
Above-mentioned light focus pack comprises light focus pack pedestal, focus lamp and hold-down nut, ladder mesopore is provided with in described light focus pack pedestal, in ladder mesopore, one end is installed with focus lamp by hold-down nut, the other end of light focus pack pedestal is the interface with Fiber connection, and hold-down nut, light focus pack pedestal are arranged in light focus pack mounting hole near one end of hold-down nut.
Above-mentioned light focus pack mounting hole is threaded hole, light focus pack pedestal is outside equipped with external thread near one end of hold-down nut, light focus pack pedestal is screwed onto in light focus pack mounting hole, the axis collinear of the ladder mesopore in light focus pack mounting hole, light focus pack pedestal, the mesopore of hold-down nut.
The rear side of above-mentioned light focus pack has detecting device by Fiber connection, and described detecting device is matrix-scanning detecting device or photovoltaic detectors.
An application process for spectrophotometric miniaturization light channel structure, places sample in cuvette bowl assembly, at 100-800cm
3space in, pointolite focuses on by the light path of the sample in the purification of the light path of light filter assemblies and beam path alignment, cuvette bowl assembly, light focus pack the entrance that the light signal formed delivers to detecting device or detecting device successively.
The optical band of above-mentioned pointolite is 190nm-1500nm.
Above-mentioned beam path alignment can realize the paralleling effect of light; The described light path by light filter assemblies purifies, and can remove unwanted impurity light and not need the stray light of wave band, reduce light path noise.
The present invention gives prominence to compared to existing technology and useful technique effect is:
1, the present invention is according to law of conservation of energy, light is shorter in the distance of space propagation, then light energy losses is then fewer, compare conventional colorimetric ware frame and optimize light channel structure, owing to decreasing a series of opticses such as slit, lens, catoptron, so effectively reduce the loss of luminous energy, while improve sensitivity for analysis, also save the manufacturing cost of instrument.
2, its all band that present invention reduces light source, to the interference detecting wave band, decreases the noise of instrument, improves the detection sensitivity of instrument.
3, the present invention reduces the molded dimension of instrument, and compact conformation is small and exquisite, is suitable as very much the core component of various scene and on-line instrument, solves the application limitation that traditional spectrophotometer is difficult to on-the site analysis, expands the range of application of instrument.
4, easy maintenance of the present invention, once optics reaches serviceable life, user can directly change at the scene, carrying out loaded down with trivial details correction, improve the work efficiency of user without the need to returning factory.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the light channel structure of background technology UV1900.
Fig. 2 is stereographic map of the present invention.
Fig. 3 is smooth filter assemblies stereographic map of the present invention.
Fig. 4 is the cut-open view of smooth filter assemblies of the present invention.
Fig. 5 is the stereographic map of smooth focus pack of the present invention.
Fig. 6 is the cut-open view of smooth focus pack of the present invention.
Fig. 7 is the light channel structure schematic diagram that application the present invention is formed.
Embodiment
Below in conjunction with accompanying drawing, with specific embodiment, the invention will be further described, see Fig. 2-7:
A kind of spectrophotometric miniaturization light channel structure, comprise cuvette pedestal 1, light filter assemblies 2, light focus pack 3 and cuvette bowl assembly 4, light filter assemblies mounting hole and light focus pack mounting hole is respectively arranged with at the two ends of cuvette pedestal 1, described cuvette bowl assembly 4 is arranged on cuvette pedestal 1, on the light filter assemblies mounting hole that light filter assemblies 2 and light focus pack 3 are separately positioned on cuvette pedestal 1 two ends and light focus pack mounting hole, at light filter assemblies 2, light focus pack 3, cuvette bowl assembly 4, cuvette pedestal 1 is formed with the light path for detecting the cuvette information on cuvette bowl assembly 4.
Above-mentioned cuvette bowl assembly 4 is removably disposed on the middle part of cuvette pedestal 1.
Above-mentioned removably setting is: at the middle part of cuvette pedestal 1 to being arranged with groove, cuvette bowl assembly 4 is arranged in the groove of cuvette pedestal 1, the size of groove and the size of cuvette bowl assembly 4 match, the cuvette bowl assembly 4 of the present embodiment is in rectangular-shaped, groove is also the rectangular-shaped groove matched with it, directly takes out replacing and just can during replacing;
Or at the middle part of cuvette pedestal 1 to being arranged with groove, cuvette bowl assembly 4 is arranged in the groove of cuvette pedestal 1 by screw, and during replacing, knockout screw is changed again.
Above-mentioned cuvette bowl assembly 4 is made up of two pieces of fixed blocks be arranged side by side 5, the middle part of both sides adjacent on fixed block 5 is respectively arranged with open slot, two open slots merging are combined to form the pickup groove 6 being used for fixing cuvette, both sides adjacent on two fixed blocks 5 are respectively arranged with the long open slot arranged along its length, two long open slots merging are combined to form through hole 7, the axis of the center line of through hole 7, the center line of pickup groove 6, light filter assemblies mounting hole and the axis collinear of light focus pack mounting hole.
The cross section of above-mentioned pickup groove 6 is square or circular, and the width of the pickup groove 6 of square-section is 1-5cm; Or the diameter of the pickup groove of round section is 1-5cm.The pickup groove 6 of square-section is used for fixing cuvette, and the pickup groove of round section can be used to fixing colorimetric cylinder.
Removably setting is the use of conveniently various cuvette, and the size of the pickup groove 6 of cuvette bowl assembly 4 is controlled as 1cm, 2cm, 3cm, 4cm, 5cm etc., only need change the cuvette bowl assembly 4 with required size during use.
Above-mentioned light filter assemblies 2 comprises filtering bench 8, filtering bench 8 is provided with ladder mesopore 9, collimating mirror 10 is provided with in one end of ladder mesopore 9, collimating mirror 10 is spirally connected fixing by photoconduction cylinder 11 and filtering bench 8, the other end is screwed onto by filter plug screw 12 and filtering bench 8 injects angle along light source 16 was installed with filter catch 13 successively, optical filter 14 and excessively filter catch 15, the outer end of described photoconduction cylinder 11 is positioned at outside filtering bench 8 for being connected with light source 16, the outer face of photoconduction cylinder 11 is provided with the unthreaded hole 17 with ladder mesopore 9 coaxial cable, the other end of filtering bench 8 is arranged in the filter assemblies mounting hole of cuvette pedestal 1.Light filter assemblies 2 also can replace using with common filter glass.
Light source 16 comprises deuterium lamp, tungsten lamp, xenon lamp, halogen mercury vapor lamp and LED etc., then the part that the outer end of photoconduction cylinder 11 is positioned at outside filtering bench 8 is directly connected with tungsten lamp seat.Light filter assemblies 2 launches for receiving light source 16 the light of coming, and filters the light of unwanted wave band according to demand.Wherein collimating mirror 10 is converted into directional light in order to the light transmitted by light source 16.Wherein optical filter 14 can adjust according to demand, thus the application of expansion instrument.Such as need for reducing the interference of its all band to visible ray between 360-400nm, can the optical filter 14 of selective cut-off 400nm, make the light being greater than 400nm not enter system, reduce interference, improve the detection sensitivity (being applicable to the detection demand of high pass too) of instrument.Such as instrument is specially a certain material and the instrumentation developed again, as long as then select to only transmit the optical filter 14 of specific wavelength, such as select the optical filter 14 of 420nm, then the light removing 420nm wavelength can be through, other are all blocked, and substantially increase the sensitivity of instrument.
Above-mentioned filter assemblies mounting hole is threaded hole, and the other end of filtering bench 8 is outside equipped with external thread, and the other end of filtering bench 8 is screwed onto in filter assemblies mounting hole, ladder mesopore 9 axis collinear on filter assemblies mounting hole, unthreaded hole 17, filtering bench 8.What unthreaded hole 17 adopted is circular unthreaded hole.
Above-mentioned light focus pack 3 comprises light focus pack pedestal 18, focus lamp 19 and hold-down nut 20, ladder mesopore 21 is provided with in described light focus pack pedestal 18, in ladder mesopore 21, one end is installed with focus lamp 19 by hold-down nut 20, the other end of light focus pack pedestal 18 is the interfaces be connected with optical fiber 22, and hold-down nut 20, light focus pack pedestal 18 are arranged in light focus pack mounting hole near one end of hold-down nut 20.Light focus pack 3 also can adopt common focus lamp to replace using.
Light focus pack 3 Main Function is the directional light of will come from cuvette, focuses on optical fiber 22 or other receivers, strengthens light signal, improves sensitivity.
Above-mentioned light focus pack mounting hole is threaded hole, light focus pack pedestal 18 is outside equipped with external thread near one end of hold-down nut 20, light focus pack pedestal 18 is screwed onto in light focus pack mounting hole, the axis collinear of the ladder mesopore 21 in light focus pack mounting hole, light focus pack pedestal 18, the mesopore of hold-down nut 20.
The other end of above-mentioned light focus pack pedestal 18 is provided with the external thread 23 be connected with optical fiber 22.
The light that light source 16 emits, by the unthreaded hole 17 of light filter assemblies 2, makes the light dispersed become pointolite, then through collimating mirror 10 and then formation directional light.Directional light entered filter catch 13, optical filter 14 and crossed filter catch 15 will not need band of light to retain, and only allow the light of wave band needed for Instrument Design to pass through, reduce background noise.And then pass through cuvette, again through the focus lamp 19 of light focus pack 3, by the receiving port (optical fiber interface be SMA905) of parallel light focusing at optical fiber 22, finally by optical fiber 22, optical signal transmission is produced response signal to detecting device 24, and then calculate analysis result.The light source 16 that the present invention adopts is pointolite.
The application process of above-mentioned spectrophotometric miniaturization light channel structure is as follows:
Sample is placed, at 300cm in cuvette bowl assembly 4
3space in, pointolite focuses on by the light path of the sample in the beam path alignment of the collimating mirror 10 of the purification of the light path of light filter assemblies 2 and light filter assemblies 2, cuvette bowl assembly 4, light focus pack 3 entrance that the light signal formed delivers to detecting device 24 or detecting device successively.Can certainly at 350cm
3carry out Deng in space.
Described pointolite is, by optics guiding means, light source is formed pointolite, reduce interference, so that spectrophotometric light source stability and consistance, realized the covering of 190nm-1500nm optical band by the change of visible light source, pointolite that ultraviolet source class is different.
The beam path alignment of above-mentioned collimating mirror 10 can realize the paralleling effect of light; The described light path by light filter assemblies 2 purifies, and can remove unwanted impurity light and not need the stray light of wave band, reduce light path noise; Produce Change of light energy through sample again, focus to optical fiber 22 porch eventually through the burnt assembly 3 of light and be transferred to comprise on matrix-scanning detecting device or photovoltaic detectors and produce signal.
Above-described embodiment is only preferred embodiment of the present invention, not limits the scope of the invention according to this, therefore: all equivalence changes done according to structure of the present invention, shape, principle, all should be covered by within protection scope of the present invention.
Claims (13)
1. a spectrophotometric miniaturization light channel structure, it is characterized in that: comprise cuvette pedestal, light filter assemblies, light focus pack and cuvette bowl assembly, light filter assemblies mounting hole and light focus pack mounting hole is respectively arranged with at the two ends of cuvette pedestal, described cuvette bowl assembly is arranged on cuvette pedestal, on the light filter assemblies mounting hole that light filter assemblies and light focus pack are separately positioned on cuvette pedestal two ends and light focus pack mounting hole, at light filter assemblies, light focus pack, cuvette bowl assembly, cuvette pedestal is formed with the light path for detecting the cuvette sample message on cuvette bowl assembly.
2. the spectrophotometric miniaturization light channel structure of one according to claim 1, is characterized in that: described cuvette bowl assembly is removably disposed on the middle part of cuvette pedestal.
3. the spectrophotometric miniaturization light channel structure of one according to claim 2, it is characterized in that: described removably setting is: at the middle part of cuvette pedestal to being arranged with groove, cuvette bowl assembly is arranged in the groove of cuvette pedestal, and the size of groove and the size of cuvette bowl assembly match;
Or at the middle part of cuvette pedestal to being arranged with groove, cuvette bowl assembly is arranged in the groove of cuvette pedestal by screw.
4. the spectrophotometric miniaturization light channel structure of one according to claim 1 or 2 or 3, it is characterized in that: described cuvette bowl assembly is made up of the fixed block that two pieces are arranged side by side, the middle part of both sides adjacent on fixed block is respectively arranged with open slot, two open slots merging are combined to form the pickup groove being used for fixing cuvette, both sides adjacent on two fixed blocks are respectively arranged with the long open slot arranged along its length, two long open slots merging are combined to form through hole, the center line of through hole, the center line of pickup groove, the axis of light filter assemblies mounting hole and the axis collinear of light focus pack mounting hole.
5. the spectrophotometric miniaturization light channel structure of one according to claim 4, is characterized in that: the cross section of described pickup groove is square or circular, and the width of the pickup groove of square-section is 1-5cm; Or the diameter of the pickup groove of round section is 1-5cm.
6. the spectrophotometric miniaturization light channel structure of one according to claim 1, it is characterized in that: described light filter assemblies comprises filtering bench, filtering bench is provided with ladder mesopore, collimating mirror is provided with in one end of ladder mesopore, collimating mirror is spirally connected fixing by photoconduction cylinder and filtering bench, the other end is screwed onto by filter plug screw and filtering bench injects angle along lamp source was installed with filter catch successively, optical filter and excessively filter catch, the outer end of described photoconduction cylinder is positioned at outside filtering bench for being connected with lamp source, the outer face of photoconduction cylinder is provided with the unthreaded hole with ladder mesopore coaxial cable, the other end of filtering bench is arranged in the filter assemblies mounting hole of cuvette pedestal light.
7. the spectrophotometric miniaturization light channel structure of one according to claim 6, it is characterized in that: described filter assemblies mounting hole is threaded hole, the other end of filtering bench is outside equipped with external thread, the other end of filtering bench is screwed onto in filter assemblies mounting hole, the ladder mesopore axis collinear on filter assemblies mounting hole, unthreaded hole, filtering bench.
8. the spectrophotometric miniaturization light channel structure of one according to claim 1, it is characterized in that: described light focus pack comprises light focus pack pedestal, focus lamp and hold-down nut, ladder mesopore is provided with in described light focus pack pedestal, in ladder mesopore, one end is installed with focus lamp by hold-down nut, the other end of light focus pack pedestal is the interface with Fiber connection, and hold-down nut, light focus pack pedestal are arranged in light focus pack mounting hole near one end of hold-down nut.
9. the spectrophotometric miniaturization light channel structure of one according to claim 8, it is characterized in that: described light focus pack mounting hole is threaded hole, light focus pack pedestal is outside equipped with external thread near one end of hold-down nut, light focus pack pedestal is screwed onto in light focus pack mounting hole, the axis collinear of the ladder mesopore in light focus pack mounting hole, light focus pack pedestal, the mesopore of hold-down nut.
10. the spectrophotometric miniaturization light channel structure of one according to claim 1, it is characterized in that: the rear side of described light focus pack has detecting device by Fiber connection, described detecting device is matrix-scanning detecting device or photovoltaic detectors.
The application process of 11. 1 kinds of spectrophotometric miniaturization light channel structures, is characterized in that: place sample in cuvette bowl assembly, at 100-800cm
3space in, pointolite delivers to the entrance of detecting device or detecting device by the formation light signal of the sample in the purification of the light path of light filter assemblies and beam path alignment, cuvette bowl assembly, light focus pack successively.
The application process of 12. a kind of spectrophotometric miniaturization light channel structures according to claim 11, is characterized in that: the optical band of described pointolite is 190nm-1500nm.
The application process of 13. a kind of spectrophotometric miniaturization light channel structures according to claim 11, is characterized in that: described beam path alignment can realize the paralleling effect of light; The described purification of the light path by light filter assemblies can be removed unwanted impurity light and do not needed the stray light of wave band, reduces light path noise.
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Cited By (3)
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| CN107991251A (en) * | 2017-11-08 | 2018-05-04 | 白志平 | A kind of microspectrophotometer |
| CN110095418A (en) * | 2019-04-08 | 2019-08-06 | 北京时代新维测控设备有限公司 | A kind of photoelectric colorimetry measuring device |
| CN113466163A (en) * | 2021-07-30 | 2021-10-01 | 谢江湖 | High accuracy water quality testing appearance |
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| CN113466163A (en) * | 2021-07-30 | 2021-10-01 | 谢江湖 | High accuracy water quality testing appearance |
| CN113466163B (en) * | 2021-07-30 | 2023-01-17 | 珠海市亿耀技术有限公司 | High accuracy water quality testing appearance |
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| Publication number | Publication date |
|---|---|
| CN104614071B (en) | 2017-01-11 |
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