CN109724918B - Element for detecting coupling degree of light and chiral solution - Google Patents
Element for detecting coupling degree of light and chiral solution Download PDFInfo
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- CN109724918B CN109724918B CN201910133811.1A CN201910133811A CN109724918B CN 109724918 B CN109724918 B CN 109724918B CN 201910133811 A CN201910133811 A CN 201910133811A CN 109724918 B CN109724918 B CN 109724918B
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Abstract
The invention relates to the technical field of micro-nano optics, in particular to an element for detecting the coupling degree of detection light and chiral solution. The degree of coupling of the incident light to the chiral solution is proportional to the degree to which the interference fringes are shifted from the center line. The technical problems that the measurement of the coupling degree of incident light and chiral solution in the prior art needs a high-precision optical measuring instrument to measure and the detection cost is high are solved. The technical effect of visualizing the coupling degree of the incident light and the chiral solution is realized, the detection cost is reduced, the use is convenient, and the popularization value is very high.
Description
Technical Field
The invention relates to the technical field of micro-nano optics, in particular to an element for detecting the coupling degree of light and a chiral solution.
Background
Chiral molecules are molecules that are mirror symmetric in their chemical structure and do not completely coincide. When carbon atoms form an organic molecule, 4 atoms or groups can form a three-dimensional spatial structure through 4 covalent bonds. It forms two molecular structures due to the difference in the atoms or groups attached. The two molecules have the same physical properties but may have great difference in chemical properties, and the two molecules often have difference in potency, toxicity and the like, and some have even opposite effects. From the perspective of the compositional shape of the molecules, they remain two molecules. This situation looks like objects inside and outside the mirror, corresponding to each other. Due to their three-dimensional structure, they do not coincide regardless of rotation, as do the left and right hand, which are said to have chirality, also called chiral molecules. The two molecules are therefore isomeric with each other, the isomeric form being referred to as chiral isomerism, both in the R and S form.
Chiral molecules generally exist in a solution form, but chiral measurement of chiral solutions needs to be performed by using a circular dichroism spectrometer, but the circular dichroism spectrometer is expensive and cannot be borne by a common laboratory, and measurement of the coupling degree of incident light and the chiral solutions needs to be performed by a high-precision optical measuring instrument, so that the detection cost is high.
Disclosure of Invention
Aiming at the problems, the invention aims to solve the technical problems that the measurement of the coupling degree of incident light and chiral solution needs a high-precision optical measuring instrument and the detection cost is high.
To this end, the invention provides an element for detecting the degree of coupling of light with a chiral solution, the element comprising a substrate and a bulk structure; the body structure is provided with a light inlet, a first light path cavity and a second light path cavity; the first light path cavity is the same as the second light path cavity; the first light path cavity and the second light path cavity are symmetrical about the light inlet; the first optical path cavity comprises a first inclined section and a first horizontal section; the first inclined section is connected with the light inlet; the second optical path cavity comprises a second inclined section and a second horizontal section; the second inclined section is connected with the light inlet.
Furthermore, an imaging plate is arranged on one side of the first horizontal section and one side of the second horizontal section; the imaging plate is separated from the body structure.
Furthermore, a central line is arranged at the position of the imaging plate opposite to the light inlet.
Furthermore, the outlet ends of the first horizontal section and the second horizontal section are respectively provided with polaroids with the same direction.
Furthermore, one end of the first horizontal section, which is close to the first inclined section, is provided with a transparent blocking sheet; one end of the second horizontal section, which is close to the second inclined section, is provided with a transparent blocking piece.
Further, the first horizontal segment and the second horizontal segment are both provided with an arc-shaped plate.
Furthermore, the first horizontal section and the second horizontal section are both provided with metal particles; the second horizontal segment is filled with a chiral solution.
Further, both ends of the arc-shaped plate are separated from the body structure.
The invention has the beneficial effects that: the embodiment of the application provides an element for detecting the coupling degree of light and chiral solution, through set up same first light path cavity and second light path cavity after going into the light mouth, first light path cavity is the same with the second light path cavity, first light path cavity and second light path cavity are symmetrical about going into the light mouth, first light path cavity includes first slope section and first horizontal segment, first slope section is connected with going into the light mouth, the second light path cavity includes second slope section and second horizontal segment, the second slope section is connected with going into the light mouth. Injecting the chiral solution into any one of the light path cavities, coupling the chiral solution with the incident light under the irradiation of the incident light, changing the light path, generating interference fringes, projecting the interference fringes onto the imaging plate, and judging the coupling degree of the detection light and the chiral solution through the interference fringes on the imaging plate. The coupling degree of the incident light and the chiral solution is in direct proportion to the degree of the interference fringes deviating from the central line, the higher the coupling degree of the incident light and the chiral solution is, the larger the optical path is, and the higher the deviation degree of the interference fringes on the imaging plate to the direction far away from the central line is; when the incident light is not coupled with the chiral solution, the interference fringes are uniformly distributed on two sides of the central line. The technical problems that the measurement of the coupling degree of incident light and chiral solution in the prior art needs a high-precision optical measuring instrument to measure and the detection cost is high are solved. The coupling degree of the incident light and the chiral solution is visual and visible by naked eyes, the detection cost is reduced, the use is convenient, and the popularization value is very high.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of an element for detecting a degree of coupling between light and a chiral solution according to an embodiment of the present disclosure.
In the figure: 1. a first light path cavity; 11. a first inclined section; 12. a first horizontal segment; 2. a second optical path cavity; 21. a second inclined section; 22. a second horizontal segment; 3. a light inlet; 4. an imaging plate; 5. metal particles; 6. an arc-shaped plate; 7. a polarizing plate; 8. a transparent blocking sheet.
Detailed Description
The embodiment of the application provides an element for detecting the coupling degree of light and chiral solution, the coupling degree of incident light and chiral solution is in direct proportion to the degree of deviation of interference fringes from a central line, the higher the coupling degree of the incident light and the chiral solution is, the larger the optical path is, and the higher the deviation degree of the interference fringes on an imaging plate to a direction far away from the central line is; when the incident light is not coupled with the chiral solution, the interference fringes are uniformly distributed on two sides of the central line. The technical problems that the measurement of the coupling degree of incident light and chiral solution in the prior art needs a high-precision optical measuring instrument to measure and the detection cost is high are solved. The coupling degree of the incident light and the chiral solution is visual and visible by naked eyes, the detection cost is reduced, the use is convenient, and the popularization value is very high.
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Example 1:
for solving the technical problems that the measurement of the coupling degree of incident light and chiral solution in the prior art needs a high-precision optical measurement instrument and the detection cost is high, the embodiment provides an element for detecting the coupling degree of incident light and chiral solution, the element comprises a substrate and a body structure, as shown in fig. 1, the body structure is provided with a light inlet 3, a first light path cavity 1 and a second light path cavity 2, the first light path cavity 1 and the second light path cavity 2 are the same, the first light path cavity 1 and the second light path cavity 2 are vertically symmetrical about the light inlet 3, the first light path cavity 1 comprises a first inclined section 11 and a first horizontal section 12, the first inclined section 11 is connected with the light inlet 3, the second light path cavity 2 comprises a second inclined section 21 and a second horizontal section 22, and the second inclined section 21 is connected with the light inlet 3. An imaging plate 4 is arranged on one side of the first horizontal section 12 and the second horizontal section 22, and the imaging plate 4 is separated from the body structure. The position of the imaging plate 4 opposite to the light inlet 3 is provided with a central line. The outlet ends of the first horizontal segment 12 and the second horizontal segment 22 are respectively provided with a polaroid 7 with the same direction.
Specifically, the method comprises the following steps:
the chiral solution is injected into any one of the light path cavities, under the irradiation of the incident light, the incident light and the chiral solution are coupled with each other, the light path is changed, then the light is converted into linearly polarized light through the polaroid 7 and is projected onto the imaging plate 4 to generate interference fringes, and finally the coupling degree of the detection light and the chiral solution can be judged through the interference fringes on the imaging plate 4. The coupling degree of the incident light and the chiral solution is in direct proportion to the degree of the interference fringes deviating from the central line, the higher the coupling degree of the incident light and the chiral solution is, the larger the optical path is, and the higher the deviation degree of the interference fringes on the imaging plate 4 to the direction far away from the central line is; when the incident light is not coupled with the chiral solution, the interference fringes are uniformly distributed on two sides of the central line. The technical problems that the measurement of the coupling degree of incident light and chiral solution in the prior art needs a high-precision optical measuring instrument to measure and the detection cost is high are solved. The coupling degree of the incident light and the chiral solution is visual and visible by naked eyes, the detection cost is reduced, the use is convenient, and the popularization value is very high.
The incident light of this embodiment is specifically circular polarized light, and the exit ends of the first horizontal segment 12 and the second horizontal segment 22 are respectively provided with a polarizer 7, and convert the incident light into linear polarized light, thereby generating uniform interference fringes on the imaging plate 4, and the generated interference fringe spectrum has a better effect, and is more favorable for naked eye observation.
The first horizontal segment 12 and the second horizontal segment 22 are both provided with metal particles 5, and the second horizontal segment 22 is injected with chiral solution.
In this embodiment, the metal structure is specifically a metal micro-nano structure, and is used to enhance the coupling degree between the incident light and the chiral solution, so that interference fringes easy to identify are generated on the imaging plate 4.
The end of the first horizontal segment 12 close to the first inclined segment 11 is provided with a transparent baffle 8, and the end of the second horizontal segment 22 close to the second inclined segment 21 is provided with a transparent baffle 8. Used for preventing chiral solution from flowing into the light inlet 3 through the inclined section to pollute the light source.
The first horizontal segment 12 and the second horizontal segment 22 are both provided with an arc-shaped plate 6.
Specifically, the method comprises the following steps:
the arc face of the arc plate 6 is separated from the body structure or contacted with the body structure, and two ends of the arc plate 6 are separated from the body structure. The micro-nano structure is small in size and extremely easy to damage, the impact force in the solution flowing process is extremely easy to damage, the arc-shaped plate 6 is arranged above the micro-nano structure to effectively reduce the impact of the solution flowing on the micro-nano structure, and the service life of the detection element is prolonged.
This embodiment provides an element for detecting the coupling degree of light and chiral solution, through set up same first light path cavity 1 and second light path cavity 2 after going into light mouth 3, first light path cavity 1 is the same with second light path cavity 2, first light path cavity 1 and second light path cavity 2 are symmetrical about going into light mouth 3, first light path cavity 1 includes first slope section 11 and first horizontal segment 12, first slope section 11 is connected with going into light mouth 3, second light path cavity 2 includes second slope section 21 and second horizontal segment 22, second slope section 21 is connected with going into light mouth 3. Injecting the chiral solution into any one of the light path cavities, coupling the chiral solution with the incident light under the irradiation of the incident light, changing the light path, generating interference fringes, projecting the interference fringes onto the imaging plate 4, and judging the coupling degree of the detection light and the chiral solution through the interference fringes on the imaging plate 4. The coupling degree of the incident light and the chiral solution is in direct proportion to the degree of the interference fringes deviating from the central line, the higher the coupling degree of the incident light and the chiral solution is, the larger the optical path is, and the higher the deviation degree of the interference fringes on the imaging plate 4 to the direction far away from the central line is; when the incident light is not coupled with the chiral solution, the interference fringes are uniformly distributed on two sides of the central line. The technical problems that the measurement of the coupling degree of incident light and chiral solution in the prior art needs a high-precision optical measuring instrument to measure and the detection cost is high are solved. The coupling degree of the incident light and the chiral solution is visual and visible by naked eyes, the detection cost is reduced, the use is convenient, and the popularization value is very high.
In the using process, the chiral solution is only required to be injected into the second horizontal segment 22 of the first optical path cavity 1 or the second optical path cavity 2 shown in fig. 1, and then the transparent plugs are plugged on the first horizontal segment 12 and the second horizontal segment 22 to start the detection. Under the irradiation of incident light, the coupling degree of the incident light and chiral solution can be judged according to the offset of interference fringes on the imaging plate 4, when the incident light is continuous circularly polarized light, the interference fringes are generated on the imaging plate 4 after the transmission light of the first light path cavity 1 and the transmission light of the second light path cavity 2 are superposed, through measuring the distance between the interference fringes, the ellipsometry of the incident light passing through the first light path cavity 1 and the second light path cavity 2 can be obtained through measurement and naked eye observation, the operation is convenient, and the measurement is easy.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (5)
1. An element for detecting the degree of coupling of light to a chiral solution, the element comprising a substrate and a bulk structure; the light path structure is characterized in that the body structure is provided with a light inlet, a first light path cavity and a second light path cavity; the first light path cavity is the same as the second light path cavity; the first light path cavity and the second light path cavity are symmetrical about the light inlet;
the first optical path cavity comprises a first inclined section and a first horizontal section; the first inclined section is connected with the light inlet;
the second optical path cavity comprises a second inclined section and a second horizontal section; the second inclined section is connected with the light inlet;
the outlet ends of the first horizontal section and the second horizontal section are respectively provided with polaroids with the same direction; the first horizontal segment and the second horizontal segment are internally provided with an arc-shaped plate, and the arc-shaped surface of the arc-shaped plate is separated from or contacted with the body structure.
2. The element for detecting the degree of coupling between light and a chiral solution according to claim 1, wherein an imaging plate is disposed on one side of the first horizontal segment and one side of the second horizontal segment;
the imaging plate is separated from the body structure.
3. The element for detecting the degree of coupling between an optical fiber and a chiral solution according to claim 2, wherein the imaging plate is disposed opposite to the light inlet with a central line.
4. The element for detecting the degree of coupling between light and a chiral solution according to claim 1, wherein a transparent blocking plate is disposed at one end of the first horizontal segment near the first inclined segment;
one end of the second horizontal section, which is close to the second inclined section, is provided with a transparent blocking piece.
5. The element for detecting the degree of coupling between light and a chiral solution according to claim 1, wherein the first horizontal segment and the second horizontal segment are both provided with metal particles;
the second horizontal segment is filled with a chiral solution.
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| DE102014104268A1 (en) * | 2014-03-26 | 2015-10-01 | Anton Paar Gmbh | Optical measuring system for measuring polarization-optical properties of a sample |
| US9702812B2 (en) * | 2014-05-08 | 2017-07-11 | Theodore Peter Rakitzis | Cavity enhanced polarimeter and related methods |
| CN108760646B (en) * | 2018-06-22 | 2020-12-22 | 浙江清华柔性电子技术研究院 | Chiral sensing device and fluid chiral detection system |
| CN208420680U (en) * | 2018-08-11 | 2019-01-22 | 中山科立特光电科技有限公司 | It is a kind of for detecting the optics thermal detector of chiral molecules |
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| CN1847928A (en) * | 2006-05-15 | 2006-10-18 | 浙江大学 | Multimode interference coupling LiNbO integrated electro-optical modulation device |
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| CN105378455A (en) * | 2014-06-02 | 2016-03-02 | 株式会社爱宕 | Device for measuring optical rotation and refractive index |
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