CN207689377U - A kind of micro detecting device - Google Patents

Abstract

The utility model discloses a kind of micro detecting devices, including excitation light source, detection probe, Raman spectrum analysis instrument and the optical fiber circulator for making light one-way transmission between excitation light source, detection probe, Raman spectrum analysis instrument, it is characterized in that, equipped with vacuum chamber and the Hollow-Core Photonic Crystal Fibers and air pump that are connected to vacuum chamber in the detection probe, the Hollow-Core Photonic Crystal Fibers internal cavity inner wall is equipped with the metal layer of nanostructure, the utility model has the beneficial effects that：The utility model is combined using Hollow-Core Photonic Crystal Fibers with Surface enhanced Raman scattering technology, substantially increase Raman scattering signal, transmission medium of the optical fiber as light is used simultaneously, using optical-fiber type device as beam splitter, thus the system is all optical fibre structure, miniature portable, it is suitable for various application scenarios, and detection sensitivity is very high, is suitable for the detection that trace detection is also applied for high concentration, has very high efficiency.

Description

A kind of micro detecting device

Technical field

The utility model is related to food and medicine analysis field, specifically a kind of micro detecting device.

Background technology

Food and drug safety is the major issue concerning human life and health and people's livelihood and national welfare, in recent years, eats drug safety Problem becomes the focal issue of various circles of society.Food drug safety detection is to ensure the important means of food drug safety, is had very Important meaning.Especially for fast inspection industry, it is necessary to have the highly sensitive quick detection devices of miniaturization, to meet increasingly The food drug detection demand of growth.Presently, there are detection technique mainly have following a few classes：Chromatograph, mass spectrograph, biochemistry Method, spectral technique etc..Chromatograph, spectrometer system are more complex, belong to relatively large equipment, are mainly used in test in laboratory, Detection cycle is longer；Biochemical method is widely used in eating the safety testing field of drug always, can reach higher Detection sensitivity, but biochemical method is generally required to use detection means, the reaction time consumptions such as reagent long；Spectral technique Including absorption spectrum, emission spectrum and scattering spectrum, spectrum analysis is a kind of lossless Fast Detection Technique, and analysis cost is low, Especially raman scattering spectrum, to same sample, the displacement of same Raman line is unrelated with the wavelength of incident light, only and sample Vibration-rotation energy level is related, and the measurement of full spectral coverage may be implemented in the fingerprint characteristic with molecule.

For Raman spectrum since its scattering section is smaller and is influenced by fluorescence background, Raman scattering signal is fainter, Even it is submerged in ambient noise.Have benefited from the fast development of laser technology and nanosecond science and technology, Raman signal is constantly increased By force, the especially fast development of some Raman analysis technologies, such as confocal micro Raman spectrum technology, Fourier change Raman light Spectral technology, resonant check Raman spectroscopy, Surface enhanced Raman spectroscopy technology etc., Raman spectrum detection technique become food drug The powerful of safety detection.But due to complicated light path system, these Raman spectrum analysis technologies are rarely used for small-sized The quick detection device changed, so that the sensitivity for minimizing portable detection device at present is relatively low.

Utility model content

The purpose of this utility model is to provide a kind of micro detecting devices, to solve mentioned above in the background art ask Topic.

To achieve the above object, the utility model provides the following technical solutions：

A kind of micro detecting device, including excitation light source, detection probe, Raman spectrum analysis instrument and make light along excitation The optical fiber circulator of one-way transmission between light source, detection probe, Raman spectrum analysis instrument, which is characterized in that the detection probe It is interior equipped with vacuum chamber and the Hollow-Core Photonic Crystal Fibers and air pump that be connected tos with vacuum chamber, sky in the Hollow-Core Photonic Crystal Fibers Cavity wall is equipped with the metal layer of nanostructure.

As further program of the utility model：The excitation light source is laser light source, and the laser light source is selected non- Light source in sample to be tested fluorescence spectrum area.

As further program of the utility model：The excitation light source, detection probe, Raman spectrum analysis instrument and optical fiber Between circulator light path connection is carried out by Transmission Fibers.

As further program of the utility model：Between the vacuum chamber and Transmission Fibers and Hollow-Core Photonic Crystal Fibers Pass through sealed connection.

As further program of the utility model：The metal layer is metal nano-particle layer.

Compared with prior art, the utility model has the beneficial effects that：The utility model uses Hollow-Core Photonic Crystal Fibers It is combined with Surface enhanced Raman scattering technology, substantially increases Raman scattering signal, while the transmission using optical fiber as light Medium, using optical-fiber type device as beam splitter, thus the system is all optical fibre structure, and miniature portable is suitable for various answer With occasion, and detection sensitivity is very high, is suitable for the detection that trace detection is also applied for high concentration, has very high effect Rate.

Description of the drawings

Fig. 1 is the structure principle chart of the utility model.

Fig. 2 is the detection probe sectional view of the utility model.

Fig. 3 is the optical fiber sectional view of the utility model detection probe.

Fig. 4 is the detection probe preparation principle figure of the utility model.

In figure：1- excitation light sources, 2- optical fiber circulators, 3- Raman spectrum analyses instrument, 4- detection probes, 5- vacuum chambers, 6- Hollow-Core Photonic Crystal Fibers, 7- metal layers, 8- air pumps, 9- metal nano solution.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.

Referring to Fig. 1, in the utility model embodiment, a kind of micro detecting device, including excitation light source 1, detection probe 4, Raman spectrum analysis instrument 3 and make light one-way transmission between excitation light source 1, detection probe 4, Raman spectrum analysis instrument 3 Optical fiber circulator 2, excitation light source 1 is laser light source, and should avoid the glimmering of determinand during selecting optical maser wavelength The wave-length coverage of light spectrum, optical fiber circulator 2 are so that light wave arrives Raman in excitation light source 1 to detection detection 4, detection detection 4 It can be with one-way transmission, the interior hollow photon for being equipped with vacuum chamber 5 and being connected to vacuum chamber 5 of detection probe 4 between spectroanalysis instrument 3 Crystal optical fibre 6 and air pump 8,6 internal cavity of Hollow-Core Photonic Crystal Fibers, 5 inner wall are equipped with the metal layer 7 of nanostructure, metal nano Stratum granulosum is that metal nanoparticle solution is pressed into Hollow-Core Photonic Crystal Fibers 6 by 5 negative pressure of vacuum chamber, is then being passed through The mode of high temperature evaporation makes metal nanoparticle be attached on 6 inner wall of Hollow-Core Photonic Crystal Fibers, and then forms detection probe 4, It is sealed connection between Hollow-Core Photonic Crystal Fibers 6, Transmission Fibers, air pump 8 and positive cavity 5 in detection probe 4.

The utility model structure novel, it is stable, when the utility model is used, by the hollow light in detection probe 4 Photonic crystal fiber 6 is placed into solution to be measured, then booster air pump 8, is formed in vacuum chamber 5 and Hollow-Core Photonic Crystal Fibers 6 Subnormal ambient, and then solution to be measured can be pumped into Hollow-Core Photonic Crystal Fibers 6, then select the laser light of suitable wavelength Source simultaneously starts excitation light source 1, and the laser that excitation light source 1 generates is transferred in Hollow-Core Photonic Crystal Fibers 6 by Transmission Fibers, So that the solution interaction to be measured of laser and Hollow-Core Photonic Crystal Fibers 6 and Raman scattering is generated, due to hollow photon 6 inner wall of crystal optical fibre is equipped with metallic nanoparticle coating, thus can be formed and be increased to Raman scattering, generates surface-enhanced Raman Scattering, then enhanced Raman scattering light wave is transferred to by Transmission Fibers in Raman spectrum analysis instrument 3, then by that will measure Raman heat dissipation light wave be compared with normalized Raman scattering spectrum, and then can be to go out the ingredient of sample to be tested and dense at inverting Degree, upon completion of the assays, can be pumped into gas by air pump 8 into vacuum chamber 5, make to be in high pressure conditions in vacuum chamber 5, in turn Solution to be measured in Hollow-Core Photonic Crystal Fibers 6 can be blown down, reach the cleaning to Hollow-Core Photonic Crystal Fibers 6, to improve To the measurement accuracy of different samples to be tested.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this practicality is new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing in the equivalent requirements of the claims will be fallen All changes in justice and range are embraced therein.Any reference numeral in claim should not be considered as limitation Involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiment being appreciated that.

Claims (5)

1. a kind of micro detecting device, including excitation light source (1), detection probe (4), Raman spectrum analysis instrument (3) and make light The optical fiber circulator (2) of line one-way transmission between excitation light source (1), detection probe (4), Raman spectrum analysis instrument (3), it is special Sign is, equipped with vacuum chamber (5) and the Hollow-Core Photonic Crystal Fibers (6) being connected to vacuum chamber (5) in the detection probe (4) With air pump (8), Hollow-Core Photonic Crystal Fibers (6) the internal cavity inner wall is equipped with the metal layer (7) of nanostructure.

2. a kind of micro detecting device according to claim 1, which is characterized in that the excitation light source (1) is laser light Source, the laser light source select the light source in non-sample to be tested fluorescence spectrum area.

3. a kind of micro detecting device according to claim 1, which is characterized in that the excitation light source (1), detection probe (4), light path is carried out by Transmission Fibers between Raman spectrum analysis instrument (3) and optical fiber circulator (2) to connect.

4. a kind of micro detecting device according to claim 1, which is characterized in that the vacuum chamber (5) and Transmission Fibers And pass through sealed connection between Hollow-Core Photonic Crystal Fibers (6).

5. a kind of micro detecting device according to claim 1, which is characterized in that the metal layer (7) is metal nano Stratum granulosum.