CN212031304U - Novel Raman spectrometer based on optical field coupling device - Google Patents
Novel Raman spectrometer based on optical field coupling device Download PDFInfo
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- CN212031304U CN212031304U CN202020303867.5U CN202020303867U CN212031304U CN 212031304 U CN212031304 U CN 212031304U CN 202020303867 U CN202020303867 U CN 202020303867U CN 212031304 U CN212031304 U CN 212031304U
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Abstract
The utility model relates to a novel Raman spectrometer based on a light field coupling device, which comprises a detection light source (1), a collimating lens group (2), a light beam integration module (3), a light beam synthesizer (6), a space light field calculation part (7) and a detector (8); the detection light source is used for generating Raman light, the collimating mirror group receives the Raman light generated by the light source and forms parallel light beams, the light beam integration module divides the parallel light beams into two light beams, the two light beams are respectively reflected into a sample to be detected and a reference sample, the two light beams are combined into a spatial light field calculation component through the light beam combiner, the spatial light field calculation component integrally forms a 4-f optical system, the light field coupler is used for regulating and controlling a frequency spectrum surface, light signals output from the spatial light field calculation component are input into the detector, and the detector receives spectral information focused by the imaging component. The utility model discloses a modulation of space light field computing device can detect two detected objects for material purity detects, material analysis contrast etc..
Description
Technical Field
The utility model relates to a spectral detection technical field, especially a novel raman spectroscopy appearance based on light field coupling device.
Background
Raman scattering is a phenomenon resulting from inelastic scattering of light incident on a substance. The raman spectroscopy is a technique for detecting raman scattering generated by interaction between light and a substance, and has the advantages of non-destructive, non-invasive, and high analysis efficiency, and has many applications in the fields of archaeology, medicine, cultural relics, precious stone identification, forestry, and forensic science because each molecule has a characteristic raman spectrum corresponding to the molecule.
Raman spectrometers are mainly classified into dispersion type raman spectrometers and fourier transform raman spectrometers. The dispersion type Raman spectrometer is used for splitting light through a grating and detecting optical signals with different wavelengths by using an array CCD, the structure is fixed in the measurement process, but under the condition of high resolution and broadband measurement, the measurement luminous flux and the sensitivity are low, so the application range is limited. The Fourier transform spectrometer scans resonance information with different wavelengths by moving one of the reflectors by using a Michelson interferometer, then data obtained by scanning are converted into signals with different wave bands through Fourier transform, and elements need to be moved in a Raman measurement process, so that the influence of the environment is large.
The national intellectual property office discloses a raman spectrometer (publication number CN110553736A), which partially solves the problem that it is generally difficult to realize raman spectroscopy measurement under the condition of large variation of excitation wavelength. The prior art has certain advantages, but also has the following disadvantages: (1) only a single substance can be detected in the using process; (2) the method has no advantages in identifying the substances, needs to be carried out step by step, is complex to operate, and cannot carry out analysis and comparison among different substances at the same time.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims to solve the problem that a novel raman spectrometer based on light field coupling device that can detect two detection objects through the modulation of space light field computing device is proposed for material purity detects, material analysis contrast to solve the technical problem that can only detect single material, operate complicacy that prior art exists.
The technical solution of the present invention is to provide a following novel raman spectrometer based on a light field coupling device, comprising a detection light source, a collimator set, a light beam integration module, a light beam combiner, a spatial light field computing component and a detector, wherein the spatial light field computing component comprises an incident light screen, a convex lens, a light field coupler, a convex lens and an emergent light screen; the detection light source is used for generating Raman light, the collimating mirror group is used for receiving the Raman light generated by the light source and forming parallel light beams, the light beam integration module divides the parallel light beams into two light beams, the two light beams are respectively reflected into a sample to be detected and a reference sample, the two light beams are combined and bundled to an incident light screen in the space light field calculation component through the light beam combiner, the light beams pass through the incident light screen, the convex lens and the light field coupler and are focused to an emergent light screen in the space light field calculation component through the convex lens, the space light field calculation component integrally forms a 4-f optical system, the light field coupler is used for regulating and controlling a frequency spectrum surface, light signals output from the space light field calculation component are input into the detector, and the detector receives spectral information focused by the imaging component.
Optionally, the light beam integration module includes a first reflection lens, a second reflection lens and a first right-angle prism, the first right-angle prism divides the parallel light beam into two light beams, and the two light beams are reflected by the first reflection lens and the second reflection lens respectively and enter the sample to be measured and the reference specimen.
Optionally, the beam combiner includes a third reflection lens, a fourth reflection lens and a second right-angle prism, where the third reflection lens and the fourth reflection lens respectively receive two beams of light emitted from the sample to be measured and the reference specimen, and combine the two beams of light into a parallel beam through the second right-angle prism, and emit the parallel beam to the spatial light field calculation unit.
Optionally, the collimator lens group includes an entrance slit and a collimator lens, wherein a focal point of the collimator lens coincides with a position of the entrance slit.
Optionally, the detection light source is a high-power laser for generating raman light with one of raman excitation wavelengths of 532nm, 638nm, 785nm and 1064 nm.
Optionally, the first right-angle prism and the second right-angle prism are UV fused silica right-angle prisms, calcium fluoride right-angle prisms or N-BK7 right-angle prisms.
Optionally, the optical field coupler is a sine grating, a cosine grating or an optical field coupling device subjected to specific calculation.
Optionally, the detector is an area array detector.
Compared with the prior art, the utility model has the advantages of it is following: the utility model realizes the rapid and real-time detection of the sample to be detected; the two beams of light incident in the spatial light field computing part generate the regulation and control of the frequency spectrum surface through the light field coupler, the information whether the substance to be detected is different from the reference sample is obtained, the purity detection or the analysis and comparison are carried out on the substance by utilizing the difference of the spectra formed by different substances in the Raman scattering process, the unique light signal is output through the light field coupler, the light signal contains the difference of the two substances, and the efficient, quick and accurate purity detection or analysis and comparison on the substance are realized.
Drawings
Fig. 1 is the structure schematic diagram of the novel raman spectrometer based on the optical field coupling device of the present invention.
Fig. 2 is a schematic diagram of the space light field calculating component according to the present invention.
Shown in the figure: 1. the device comprises a detection light source, 2, a collimating mirror group, 3, a light beam integration module, 301, a first reflecting lens, 302, a first right-angle prism, 303, a second reflecting lens, 4, a sample to be detected, 5, a reference sample, 6, a light beam synthesizer, 7, a spatial light field calculation component, 701, an incident light screen, 702, a first convex lens, 703, a light field coupler, 704, a second convex lens, 705, an emergent light screen, 8 and a detector.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The present invention covers any alternatives, modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.
In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details.
The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are simplified and in non-precise proportion, and are only used for the purpose of conveniently and clearly assisting in explaining the embodiments of the present invention.
Referring to fig. 1, the utility model discloses a novel raman spectrometer based on optical field coupling device is illustrated, including detecting light source 1, collimating mirror group 2, light beam integration module 3, beam combiner 6, space optical field calculation part 7 and detector 8, space optical field calculation part 7 incident light screen 701, convex lens 702, optical field coupler 703, convex lens 704 and emergent light screen 705; the detection light source 1 is used for generating Raman light, the collimating mirror group 2 is used for receiving the Raman light generated by the light source and forming parallel light beams, the light beam integration module 3 divides the parallel light beams into two light beams, the two light beams are respectively reflected into a sample 4 to be detected and a reference sample 5, the two light beams are combined to the incident light screen 701 in the spatial light field calculation unit 7 through the light beam synthesizer 6, the light beams pass through the incident light screen 701, the convex lens 702 and the light field coupler 703 and are focused to the emergent light screen 705 in the spatial light field calculation unit 7 through the convex lens 704, the spatial light field calculation unit 7 integrally forms a 4-f optical system, the light field coupler 703 is used for regulating and controlling a frequency spectrum plane, light signals output from the spatial light field calculation unit 7 are input into the detector 8, and the detector 8 receives spectrum information focused by the imaging assembly.
The light beam integration module 3 includes a first reflection lens 301, a second reflection lens 303 and a first right-angle prism 302, the first right-angle prism 302 divides the parallel light beam into two light beams, and the two light beams are reflected by the first reflection lens 301 and the second reflection lens 303 respectively and enter the sample 4 to be measured and the reference specimen 5.
The beam combiner 6 includes a third reflection lens 601, a fourth reflection lens 603, and a second right-angle prism 602, where the third reflection lens 601 and the fourth reflection lens 603 respectively receive two beams of light incident from the sample 4 to be measured and the reference specimen 5, and combine the two beams of light into a parallel beam through the second right-angle prism 602, and then irradiate the parallel beam to the spatial light field calculation unit 7.
The collimating lens group 2 comprises an entrance slit and a collimating lens, wherein the focus of the collimating lens coincides with the position of the entrance slit.
The detection light source 1 is used for generating Raman light and is a high-power laser with one of Raman excitation wavelengths of 532nm, 638nm, 785nm and 1064 nm.
The first right-angle prism 302 and the second right-angle prism 602 are UV fused silica right-angle prisms, calcium fluoride right-angle prisms or N-BK7 right-angle prisms.
The optical field coupler 703 is a sine grating, a cosine grating or a specially calculated optical field coupler.
The detector 8 is an area array detector.
The utility model realizes the rapid and real-time detection of the sample to be detected; the two beams of light incident in the spatial light field computing part generate the regulation and control of the frequency spectrum surface through the light field coupler, the information whether the substance to be detected is different from the reference sample is obtained, the purity detection or the analysis and comparison are carried out on the substance by utilizing the difference of the spectra formed by different substances in the Raman scattering process, the unique light signal is output through the light field coupler, the light signal contains the difference of the two substances, and the efficient, quick and accurate purity detection or analysis and comparison on the substance are realized. The signal-to-noise ratio of the detection device can be improved by adopting a space light field calculation mode; the later data processing work is greatly reduced, and the output signal is directly the result of substance purity detection or comparative analysis; the utility model discloses a but key part modularization, wherein partial refraction device, beam combiner, space light field calculation part all can be integrated for single part, and the debugging is simpler.
Although the embodiments have been described and illustrated separately, it will be apparent to those skilled in the art that some common techniques may be substituted and integrated between the embodiments, and reference may be made to one of the embodiments not explicitly described, or to another embodiment described.
The above-mentioned detailed description of the technical solution and the beneficial effects of the present invention have been described in detail, it should be understood that the above is only the most preferred embodiment of the present invention, not used for limiting the present invention, any modification, supplement, equivalent replacement, etc. made within the principle scope of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. A novel Raman spectrometer based on a light field coupling device comprises a detection light source (1), a collimating mirror group (2), a light beam integration module (3), a light beam synthesizer (6), a spatial light field calculation part (7) and a detector (8), wherein the spatial light field calculation part (7) comprises an incident light screen (701), a first convex lens (702), a light field coupler (703), a second convex lens (704) and an emergent light screen (705); the method is characterized in that: the detection light source (1) is used for generating Raman light, the collimating mirror group (2) is used for receiving the Raman light generated by the light source and forming parallel light beams, the light beam integration module (3) divides the parallel light beams into two light beams, the two light beams are respectively reflected into a sample to be detected (4) and a reference specimen (5), the two light beams are combined to the incident light screen (701) in the space light field calculation part (7) through the light beam synthesizer (6), the light beams pass through the incident light screen (701), the first convex lens (702) and the light field coupler (703) and are focused to the emergent light screen (705) in the space light field calculation part (7) through the second convex lens (704), the space light field calculation part (7) integrally forms a 4-f optical system, the light field coupler (703) is used for regulating and controlling a frequency spectrum plane, light signals output from the space light field calculation part (7) are input into the detector (8), a detector (8) receives spectral information focused by the imaging assembly.
2. The novel Raman spectrometer based on the optical field coupling device as claimed in claim 1, wherein: the light beam integration module (3) comprises a first reflecting lens (301), a second reflecting lens (303) and a first right-angle prism (302), the first right-angle prism (302) divides a parallel light beam into two light beams, and the two light beams are reflected into a sample to be measured (4) and a reference specimen (5) through the first reflecting lens (301) and the second reflecting lens (303) respectively.
3. The novel Raman spectrometer based on the optical field coupling device as claimed in claim 1, wherein: the light beam synthesizer (6) comprises a third reflecting lens (601), a fourth reflecting lens (603) and a second right-angle prism (602), wherein the third reflecting lens (601) and the fourth reflecting lens (603) respectively receive two beams of light emitted from a sample (4) to be measured and a reference specimen (5), and the two beams of light are synthesized into a parallel light beam through the second right-angle prism (602) and emitted to the spatial light field calculating part (7).
4. The novel Raman spectrometer based on the optical field coupling device as claimed in claim 1, 2 or 3, wherein: the collimating lens group (2) comprises an entrance slit and a collimating lens, wherein the focus of the collimating lens coincides with the position of the entrance slit.
5. The novel Raman spectrometer based on the optical field coupling device as claimed in claim 1, wherein: the detection light source (1) is used for generating Raman light and is a high-power laser with one of Raman excitation wavelengths of 532nm, 638nm, 785nm and 1064 nm.
6. The novel Raman spectrometer based on the optical field coupling device as claimed in claim 2, wherein: the first right-angle prism (302) and the second right-angle prism (602) are UV fused silica right-angle prisms, calcium fluoride right-angle prisms or N-BK7 right-angle prisms.
7. The novel Raman spectrometer based on the optical field coupling device as claimed in claim 1, wherein: the light field coupler (703) is a sine grating, a cosine grating or a light field coupling device which is subjected to specific calculation.
8. The novel Raman spectrometer based on the optical field coupling device as claimed in claim 1, wherein: the detector (8) is an area array detector.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112748102A (en) * | 2021-01-04 | 2021-05-04 | 远正(江苏)水务科技有限公司 | Active cavity traveling wave field enhanced gas Raman detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112748102A (en) * | 2021-01-04 | 2021-05-04 | 远正(江苏)水务科技有限公司 | Active cavity traveling wave field enhanced gas Raman detection device |
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