CN205426795U - From novel raman probe who takes light source - Google Patents
From novel raman probe who takes light source Download PDFInfo
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- CN205426795U CN205426795U CN201620224884.3U CN201620224884U CN205426795U CN 205426795 U CN205426795 U CN 205426795U CN 201620224884 U CN201620224884 U CN 201620224884U CN 205426795 U CN205426795 U CN 205426795U
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Abstract
The utility model provides a from novel raman probe who takes light source, it relates to optical device technical field, it contains laser lamp -house, double -colored mirror, convergent lens, bao protecting window kou, long wave pass filter, output optical fibre, double -colored mirror, convergent lens, bao protecting window kou coaxial in proper order set up to constitute and excite the light path, and coaxial setting of laser lamp -house is exciting the front end of light path, is surveyed the sample coaxial to place in the rear end that excites the light path, long wave pass filter and output optical fibre coaxial set up to constitute collects the light path. It adopts the structure of light source direct package inside the probe, does not need laser lamp -house's fiber optic coupling in earlier stage, has simplified process, has reduced the cost of raman check out test set, has improved the energy utilization of light source, is favorable to the miniaturization of equipment.
Description
Technical field
This utility model relates to optical devices technologies field, is specifically related to the novel Raman probe of a kind of automatic light source.
Background technology
Raman effect is found by India's physicist Raman, refers to the phenomenon that light wave frequency after being scattered changes.Light is irradiated on material elastic scattering and inelastic scattering, the scattered light (Rayleigh scattering light) of elastic scattering is the composition identical with excitation wavelength, inelastically scattered scattered light (Raman diffused light) has the composition than excitation wavelength, also has the composition shorter than excitation light wave.Raman spectrum analysis method is to be analyzed the scattering spectrum different from exciting light frequency, to obtain the information in terms of molecular vibration, rotation, and is applied to a kind of analysis method of molecular structure research.The characteristic of scatterer is depended in the change of scattered light frequency, and the mode of different atomic groups vibrations is unique, therefore can produce the scattered light of characteristic frequency, and its spectrum is known as " Fingerprint ", principle can identify the molecular species of component like this.Therefore, Raman spectrum analysis is widely used in biology, mineral, the qualification of chemical substance and detection.Raman spectrometer based on Raman spectrum analysis technology has a good application prospect in fields such as food safety, biological medicine, public safety, material science, gemstone testing, geological exploration, environment measurings.
Raman probe is the Primary Component of Raman spectrometer, is used for conducting excitation beam, collecting Raman spectrum.Existing Raman probe does not the most comprise LASER Light Source, but be connected with external LASER Light Source by optical fiber, LASER Light Source is generally optical fiber coupling output, also need to adapter between two optical fiber and carry out butt coupling, structure is complicated, and the coupling of optical fiber, docking also can cause extra light energy losses；Meanwhile, as the semiconductor laser of LASER Light Source before coupled into optical fibres, need to carry out spot shaping focusing, complex process, with high costs.Additionally, during the coupled optical fiber of exciting light, docking optical fiber import probe, can produce Raman scattering, will eliminate this part Raman scattering must also increase corresponding optical filter to the impact of result of detection in probe light path, further increases the complexity of system.
Summary of the invention
The purpose of this utility model is the defect for prior art and deficiency, the novel Raman probe of a kind of automatic light source is provided, it uses light source to be directly encapsulated into the structure within probe, need not the early stage optical fiber coupling of LASER Light Source, simplify technical process, reduce the cost of Raman detection equipment, improve the miniaturization of the capacity usage ratio of light source, beneficially equipment.
For achieving the above object, the technical solution adopted in the utility model is: it comprises LASER Light Source, dichroic mirror, collecting lens, protecting window, long wave pass filter, output optical fibre；Dichroic mirror, collecting lens, protecting window are the most coaxial arranges composition excitation light path, the coaxial front end being arranged on excitation light path of LASER Light Source, the coaxial rear end being placed on excitation light path of sample；Long wave pass filter and the coaxial composition that arranges of output optical fibre collect light path, collect light path and become with excitation light path 30-150 degree angle to arrange.
Further, described LASER Light Source is the light source that semiconductor laser maybe can produce exciting light.
Further, described collecting lens is spherical lens, non-spherical lens or sphere, the mirror group of non-spherical lens composition；Its effect is to focus on sample by exciting light, reversely Raman diffused light and Rayleigh scattering light is collected, and is coupled into output optical fibre.
Further, described protecting window is coated with the Raman diffused light producing exciting light and sample all there is the anti-reflection film of high permeability；Its effect is that probe light path is sealed and protected.
Further, described output optical fibre is simple optical fiber, fibre bundle, 1xN beam splitter or the Nx1 beam splitter of multifiber composition.
Operation principle of the present utility model is: the exciting light that LASER Light Source produces passes sequentially through dichroic mirror, collecting lens and protecting window; exciting light is focused on sample by collecting lens; sample is excited after light excites and Raman scattering occurs; produced Raman diffused light enters probe together with Rayleigh scattering light opposite direction through protecting window; collected by collecting lens; again after dichroic mirror, filtering Rayleigh scattering light by long wave pass filter, remaining Raman diffused light enters output optical fibre.
After using said structure, the beneficial effects of the utility model are: it need not the early stage optical fiber coupling of LASER Light Source, simplifies technical process, reduces the cost of Raman detection equipment；It uses light source to be directly encapsulated into the structure that probe is internal, improves the capacity usage ratio of light source, and reduces the device in equipment, simplifies device structure further, reduction cost, and the miniaturization of beneficially equipment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of embodiment 2.
Fig. 3 is the structural representation of embodiment 3.
Fig. 4 is the structural representation of embodiment 4.
Fig. 5 is the structural representation of embodiment 5.
Description of reference numerals:
101, LASER Light Source；102, dichroic mirror 102；103, collecting lens；104, protecting window；105, sample；106, long wave pass filter；107, output optical fibre；108, fast axis collimation lens；109, slow axis collimating lens；110, optical fiber collecting lens；111, reflecting mirror；112, exciting light collimating mirror.
Detailed description of the invention
Embodiment 1
Referring to as it is shown in figure 1, the present embodiment the technical scheme is that it comprises LASER Light Source 101, dichroic mirror 102, collecting lens 103, protecting window 104, long wave pass filter 106, output optical fibre 107；Dichroic mirror 102, collecting lens 103, protecting window 104 are the most coaxial arranges composition excitation light path; the coaxial front end being arranged on excitation light path of LASER Light Source 101; the coaxial rear end being placed on excitation light path of sample 105, dichroic mirror 102 is arranged in angle of 45 degrees with excitation light path；Long wave pass filter 106 and the coaxial composition that arranges of output optical fibre 107 collect light path, collect light path and are vertically arranged with excitation light path.
Described LASER Light Source 101 is the light source that semiconductor laser maybe can produce exciting light.
Described dichroic mirror 102 has high permeability to exciting light, and the Raman diffused light producing sample 105 has high reflectance, and forward is through exciting light in the optical path, dorsad through Rayleigh scattering light and reflect Raman diffused light for it.
Described collecting lens 103 is spherical lens, non-spherical lens or sphere, the mirror group of non-spherical lens composition；Its effect is to be focused on by exciting light on sample 105, reversely Raman diffused light and Rayleigh scattering light is collected, and is coupled into output optical fibre 107.
It is coated with the Raman diffused light that exciting light and sample are produced on described protecting window 104 and all there is the anti-reflection film of high permeability；Its effect is that probe light path is sealed and protected.
Described output optical fibre 107 is simple optical fiber, fibre bundle, 1xN beam splitter or the Nx1 beam splitter of multifiber composition.
The operation principle of the present embodiment is: the exciting light that LASER Light Source 101 produces passes sequentially through dichroic mirror 102, collecting lens 103 and protecting window 104; exciting light is focused on sample 105 by collecting lens 103; sample 105 is excited after light excites and Raman scattering occurs; produced Raman diffused light enters probe together with Rayleigh scattering light opposite direction through protecting window 104; collected by collecting lens 103; again after dichroic mirror 102; filtering Rayleigh scattering light by long wave pass filter 106, remaining Raman diffused light enters output optical fibre 107.
The present embodiment have the beneficial effect that it need not the early stage optical fiber of LASER Light Source coupling, simplify technical process, reduce the cost of Raman detection equipment；It uses light source to be directly encapsulated into the structure that probe is internal, improves the capacity usage ratio of light source, and reduces the device in equipment, simplifies device structure further, reduction cost, and the miniaturization of beneficially equipment.
Embodiment 2
Referring to as in figure 2 it is shown, the difference of the present embodiment and embodiment 1 is that it also comprises fast axis collimation lens 108；Fast axis collimation lens 108 is co-axially located between LASER Light Source 101 and dichroic mirror 102；Other parts and connected mode are same as in Example 1.
The semiconductor laser with bigger fast axis divergence angle is carried out fast axis collimation by described fast axis collimation lens 108, and selects matched collecting lens 103, can improve the efficiency of light energy utilization of exciting light.
Embodiment 3
Referring to as it is shown on figure 3, the difference of the present embodiment and embodiment 2 is that it also comprises slow axis collimating lens 109 and optical fiber collecting lens 110；Slow axis collimating lens 109 is co-axially located between fast axis collimation lens 108 and dichroic mirror 102, and optical fiber collecting lens 110 is co-axially located between long wave pass filter 106 and output optical fibre 107；Other parts and connected mode are same as in Example 2.
The slow axis of semiconductor laser is collimated by described slow axis collimating lens 109, improves the efficiency of light energy utilization of exciting light further.
The Raman diffused light that collecting lens 103 is collected is assembled by described optical fiber collecting lens 110, improves Raman diffused light and enters the coupling efficiency of output optical fibre 107.
The operation principle of the present embodiment is: the exciting light that LASER Light Source 101 produces passes sequentially through fast axis collimation lens 108, slow axis collimating lens 109, dichroic mirror 102, collecting lens 103 and protecting window 104, exciting light is collimated by fast axis collimation lens 108 and slow axis collimating lens 109, exciting light is focused on sample 105 by collecting lens 103, sample 105 is excited after light excites and Raman scattering occurs, produced Raman diffused light enters probe together with Rayleigh scattering light opposite direction through protecting window 104, collected by collecting lens 103 and collimated, again after dichroic mirror 102, Rayleigh scattering light is filtered by long wave pass filter 106, remaining Raman diffused light is coupled into output optical fibre 107 via optical fiber collecting lens 110.The present embodiment is applicable to the semiconductor laser that the fast and slow axis angle of divergence differs greatly.
Embodiment 4
Referring to as shown in Figure 4, with the difference of embodiment 3, the present embodiment is that it also comprises reflecting mirror 111；Reflecting mirror 111 be arranged in parallel with dichroic mirror 102, collects light path and be arranged in parallel with excitation light path, and reflecting mirror 111 becomes 135 degree of angles to arrange with collecting light path；Other parts and connected mode are same as in Example 3.It is beneficial in that reflecting mirror can realize turning back of light path, is conducive to reducing probe size.
Embodiment 5
Referring to as it is shown in figure 5, the present embodiment and the difference of embodiment 4, it is that the fast axis collimation lens 108 in embodiment 4 and slow axis collimating lens 109 are replaced with exciting light collimating mirror 112 by it；Other parts and connected mode are the same as in Example 4.Exciting light collimating mirror 112 can realize fast and slow axis collimation, beneficially simplied system structure simultaneously, is particularly suited for the semiconductor laser of TO encapsulation.
The above, it is merely to illustrate the technical solution of the utility model and unrestricted, other amendment or equivalent that the technical solution of the utility model is made by those of ordinary skill in the art, without departing from the spirit and scope of technical solutions of the utility model, all should contain in the middle of right of the present utility model.
Claims (7)
1. the novel Raman probe of an automatic light source, it is characterised in that: it comprises LASER Light Source (101), dichroic mirror (102), collecting lens (103), protecting window (104), long wave pass filter (106), output optical fibre (107)；Dichroic mirror (102), collecting lens (103), protecting window (104) is the most coaxial arranges composition excitation light path; the coaxial front end being arranged on excitation light path of LASER Light Source (101), the coaxial rear end being placed on excitation light path of sample (105)；Long wave pass filter (106) and the coaxial composition that arranges of output optical fibre (107) collect light path, collect light path and become with excitation light path 30-150 degree angle to arrange.
The novel Raman probe of a kind of automatic light source the most according to claim 1, it is characterised in that it also comprises fast axis collimation lens (108)；Fast axis collimation lens (108) is co-axially located between LASER Light Source (101) and dichroic mirror (102).
The novel Raman probe of a kind of automatic light source the most according to claim 2, it is characterised in that it also comprises slow axis collimating lens (109) and optical fiber collecting lens (110)；Slow axis collimating lens (109) is co-axially located between fast axis collimation lens (108) and dichroic mirror (102), and optical fiber collecting lens (110) is co-axially located between long wave pass filter (106) and output optical fibre (107).
The novel Raman probe of a kind of automatic light source the most according to claim 3, it is characterised in that it also comprises reflecting mirror (111)；Reflecting mirror (111) is located at excitation light path and collects between light path.
The novel Raman probe of a kind of automatic light source the most according to claim 4, it is characterised in that fast axis collimation lens (108) and slow axis collimating lens (109) are replaced with exciting light collimating mirror (112) by it.
The novel Raman probe of a kind of automatic light source the most according to claim 1, it is characterised in that described LASER Light Source (101) is semiconductor laser.
The novel Raman probe of a kind of automatic light source the most according to claim 1, it is characterised in that be coated with anti-reflection film on described protecting window (104).
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| CN201620224884.3U CN205426795U (en) | 2016-03-23 | 2016-03-23 | From novel raman probe who takes light source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290300A (en) * | 2016-08-04 | 2017-01-04 | 同方威视技术股份有限公司 | Portable raman spectrometer |
| CN107870399A (en) * | 2016-09-27 | 2018-04-03 | 福州高意光学有限公司 | A kind of special light receives structure |
-
2016
- 2016-03-23 CN CN201620224884.3U patent/CN205426795U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290300A (en) * | 2016-08-04 | 2017-01-04 | 同方威视技术股份有限公司 | Portable raman spectrometer |
| CN107870399A (en) * | 2016-09-27 | 2018-04-03 | 福州高意光学有限公司 | A kind of special light receives structure |
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