CN210038303U - Truncated cone prism with sealing structure - Google Patents
Truncated cone prism with sealing structure Download PDFInfo
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- CN210038303U CN210038303U CN201920384383.5U CN201920384383U CN210038303U CN 210038303 U CN210038303 U CN 210038303U CN 201920384383 U CN201920384383 U CN 201920384383U CN 210038303 U CN210038303 U CN 210038303U
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- truncated cone
- slotted hole
- prism
- circular
- sealing structure
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Abstract
The utility model provides a truncated cone prism with a sealing structure, which comprises a truncated cone prism and a sealing structure; the truncated cone-shaped prism comprises a truncated cone end, the bottom of the truncated cone end extends outwards to form a cylindrical end, and the upper surface of the truncated cone end and the side wall form an included angle of 120 degrees; the lower surface of the cylindrical end is coated with an optical coating, and the periphery of the edge of the optical coating is uniformly provided with three light guide holes; the sealing structure comprises a base and a top cover, wherein a circular groove matched with the cylindrical end is formed in the center of the bottom of the base, three optical fiber holes corresponding to the light guide holes are formed in the inner side of the circular groove, and the optical fiber holes penetrate through the base upwards; the upper part of the side wall of the base is provided with an external thread; the top cover comprises a circular ring and a circular wall which are integrally formed, the center of the circular ring comprises a first slotted hole and a second slotted hole which are concentric, the first slotted hole is larger than the second slotted hole, a gasket is arranged in the first slotted hole, and the first slotted hole and the second slotted hole are matched with the side wall of the circular table end; the annular wall is uniformly provided with a plurality of overflow grooves, and the annular wall has the advantages of simple structure, low cost, good stability, strong anti-interference capability and high sensitivity.
Description
Technical Field
The utility model belongs to the technical field of the optical prism, concretely relates to take seal structure's round platform shape prism.
Background
In the automatic production process of food and beverage such as brewing, fermentation, beverage, edible oil and the like, the concentration or the content of one or more specific substance components in the product needs to be rapidly monitored on line in real time. The spectral analysis technology has the advantages of rapidness, no damage, simplicity, convenience and accuracy, and is applied to the online monitoring of food and beverage such as fruit wine, beer, wine, beverage, milk and the like abroad; the on-line monitoring instruments developed by the spectral analysis technology for miniaturized saccharides, alcohol content, acid, ester, aldehyde ketone and the like can be widely applied to on-line monitoring in the production process of domestic food and drinks; however, the core component of the spectrum analysis device is an optical prism, and the quality of the optical prism directly affects the final detection precision.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a take seal structure's round platform shape prism to solve the current optical prism processing degree of difficulty great, the installation inconvenient, use to get up to waste time and energy, influence measurement accuracy's problem simultaneously.
The utility model provides a following technical scheme:
a truncated cone prism with a sealing structure comprises a truncated cone prism and a sealing structure; the truncated cone-shaped prism comprises a truncated cone end, the bottom of the truncated cone end extends outwards to form a cylindrical end, and the upper surface of the truncated cone end and the side wall form an included angle of 120 degrees; the lower surface of the cylindrical end is coated with an optical coating, and the periphery of the edge of the optical coating is uniformly provided with light guide holes; the sealing structure comprises a base and a top cover, wherein a circular groove matched with the cylindrical end is formed in the center of the bottom of the base, three optical fiber holes corresponding to the light guide holes respectively are formed in the inner side of the circular groove, and the optical fiber holes penetrate through the base upwards; the upper part of the side wall of the base is provided with an external thread; the top cover comprises a circular ring and a circular wall which are integrally formed, the center of the circular ring comprises a first slotted hole and a second slotted hole which are concentric, the first slotted hole is larger than the second slotted hole, a gasket is arranged in the first slotted hole, and the first slotted hole and the second slotted hole are matched with the side wall of the circular table end; the circular wall is evenly provided with a plurality of overflowing grooves, the position, close to the overflowing grooves, of the circular ring is fixedly connected with the bottom of the base through screws, and the truncated cone-shaped prism is fixed among the circular groove, the first slotted hole and the second slotted hole.
Further, the optical coating comprises a high-purity silver film on the inner layer and a protective film on the surface layer, and the thicknesses of the high-purity silver film and the protective film are both larger than 50 um.
Further, the truncated cone prism is made of a high-purity sapphire material having a refractive index of 1.77.
Further, the diameter of the cross section of the cylindrical end is 12mm, the diameters of the light guide holes are all 2mm and are uniformly distributed along the circumference with the diameter of 9mm, the height of the cylindrical end is 2.5mm, and the height of the circular table end is 5.2 mm.
Furthermore, the concentricity of the cylindrical end and the circular truncated cone end is less than or equal to 0.01, and the parallelism of the lower surface of the cylindrical end and the upper surface of the circular truncated cone end is less than or equal to 0.01.
Furthermore, the outer surface of the side wall of the cylindrical end is of a frosted structure.
Further, the top cover and the base are made of food-grade stainless steel materials.
The utility model has the advantages that:
the utility model relates to a truncated cone prism with a sealing structure, which comprises a truncated cone end, wherein the bottom of the truncated cone end extends outwards to form a cylindrical end, and the upper surface of the truncated cone end and the side wall form an included angle of 120 degrees; the lower surface of the cylindrical end is coated with an optical coating, and the periphery of the edge of the optical coating is uniformly provided with three light guide holes; the structure is simple and small, the processing and the use are convenient, the cost is low, and the stability is good;
the sealing structure comprises a base and a top cover, wherein a circular groove matched with the cylindrical end is formed in the center of the bottom of the base, the top cover comprises a circular ring and a circular wall which are integrally formed, the center of the circular ring comprises a first groove hole and a second groove hole which are concentric, a plurality of overflow grooves are uniformly formed in the circular wall, and the frustum-shaped prism is fixed among the circular groove, the first groove hole and the second groove hole; the safety of the inner truncated cone-shaped prism is protected through the annular wall, the liquid to be detected can be ensured to enter through the flow passage groove, and meanwhile, the circular groove, the first slotted hole and the second slotted hole ensure the stable installation of the truncated cone-shaped prism;
experiments and an ATR principle prove that the concentration and the absorbance are in a better linear relation, and the result shows that the light ray passing rate is improved by the reflection of the truncated cone-shaped prism through the optical coating, so that the signal-to-noise ratio is improved, the anti-interference capability is stronger, and the sensitivity is higher.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of a truncated cone prism and light rays;
FIG. 3 is a schematic view of the ground and light rays of a truncated cone prism;
FIG. 4 is a table of experimental data-alcohol concentration versus absorbance;
FIG. 5 is a graph of the table of FIG. 4;
labeled as: 1. the optical fiber laser comprises a truncated cone-shaped prism, 11 a truncated cone end, 12 a cylindrical end, 13 a light guide hole, 2 a sealing structure, 3 a base, 31 a circular groove, 32 an optical fiber hole, 33 an external thread, 4 a top cover, 41 a circular ring, 42 a ring wall, 43 a first groove hole, 44 a second groove hole, 45 a gasket, 46 an overflowing groove, 5 incident light rays and 6 returning light rays.
Detailed Description
As shown in fig. 1, a truncated cone prism with a sealing structure includes a truncated cone prism and a sealing structure; the truncated cone-shaped prism comprises a truncated cone end, the bottom of the truncated cone end extends outwards to form a cylindrical end, and the upper surface of the truncated cone end and the side wall form an included angle of 120 degrees; the lower surface of the cylindrical end is coated with an optical coating, and the periphery of the edge of the optical coating is uniformly provided with light guide holes; the relevant size and material can be selected, the optical coating comprises an inner high-purity silver film and a surface protective film, and the thicknesses of the high-purity silver film and the protective film are both more than 50 um; the truncated cone prism is made of a high-purity sapphire material with the refractive index of 1.77; the diameter of the section of the cylindrical end is 12mm, the diameters of the light guide holes are all 2mm and are uniformly distributed along the circumference with the diameter of 9mm, the height of the cylindrical end is 2.5mm, and the height of the circular truncated cone end is 5.2 mm; the concentricity of the cylindrical end and the circular truncated cone end is less than or equal to 0.01, and the parallelism of the lower surface of the cylindrical end and the upper surface of the circular truncated cone end is less than or equal to 0.01; the outer surface of the side wall of the cylindrical end is of a frosted structure.
As shown in fig. 1, the sealing structure comprises a base and a top cover, wherein a circular groove matched with the cylindrical end is formed in the center of the bottom of the base, three optical fiber holes corresponding to the light guide holes are formed in the inner side of the circular groove, and the optical fiber holes penetrate through the base upwards; the upper part of the side wall of the base is provided with an external thread; the top cover comprises a circular ring and a circular wall which are integrally formed, the center of the circular ring comprises a first slotted hole and a second slotted hole which are concentric, the first slotted hole is larger than the second slotted hole, a gasket is arranged in the first slotted hole, and the first slotted hole and the second slotted hole are matched with the side wall of the circular table end; the circular ring is provided with a plurality of overflowing grooves, the position on the circular ring close to the overflowing grooves is fixedly connected with the bottom of the base through screws, the truncated cone-shaped prism is fixed among the circular groove, the first slotted hole and the second slotted hole, and the top cover and the base are made of food-grade stainless steel materials.
As shown in fig. 2-3, one of the light guide holes is defined as an entrance hole, the other two light guide holes are defined as return holes, the optical fiber corresponding to the entrance hole is a transmitting optical fiber, and the optical fiber corresponding to the return hole is a receiving optical fiber; installing a base on the top of a probe of a spectrum analyzer (such as a V-1800 visible spectrophotometer) through external threads, and respectively connecting an emission optical fiber and an incident optical fiber to optical fiber holes; placing the probe into the liquid to be detected, and covering the surface of the truncated cone-shaped prism with the liquid to be detected through the overflowing hole; the method comprises the following steps that a multi-reflection optical system is used for emitting light rays, the light rays enter liquid to be detected from the side wall of a circular truncated cone end through an emitting optical fiber and an incidence hole, total reflection is carried out on the surface of the liquid to be detected, the reflected light rays return to a circular truncated cone-shaped prism, then the light rays are continuously reflected among an optical coating of the circular truncated cone-shaped prism, the circular truncated cone end and a contact surface of the liquid to be detected, finally the light rays are emitted into a return hole and return through;
according to ATR (attenuated total reflection), infrared light emitted from a light source passes through a crystal having a large refractive index and is projected onto a sample surface having a small refractive index, and when an incident angle is larger than a critical angle, total reflection occurs in the incident light. In fact, the infrared light is not totally reflected, but penetrates into the surface of the sample to a certain depth and then returns to the surface, in the process, the sample is selectively absorbed in an incident light frequency region, the intensity of the reflected light is weakened, a graph similar to a transmission absorption graph is generated, and therefore structural information of chemical components on the surface layer of the sample is obtained.
The specific implementation mode adopts the principle, near infrared light of 1450nm is selected as incident light, and the measured object is alcohol solution with different concentrations; the water molecules have strong absorption effect on 1450nm near infrared light, the absorbance of the infrared light by alcohol with different concentrations is different, the return light of the receiving optical fiber is analyzed by a spectrum analyzer to obtain the absorbance of the liquid to be detected, and finally the following data are obtained, such as the data shown in fig. 4-5 and the relation between the concentration of the liquid to be detected and the absorbance curve; and the following conclusions were made: 1) the infrared spectrum has stronger absorption effect on a reflecting surface, which shows that the total penetration depth of the liquid to be measured is increased after the light is multiply reflected by the truncated cone-shaped prism; 2) and the concentration and the absorbance are in a better linear relation, which shows that the light ray passing rate is improved by the reflection of the truncated cone-shaped prism through the optical coating, so that the signal-to-noise ratio is improved, the anti-interference capability is stronger, and the sensitivity is higher.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A truncated cone prism with a sealing structure is characterized by comprising a truncated cone prism and a sealing structure;
the truncated cone-shaped prism comprises a truncated cone end, the bottom of the truncated cone end extends outwards to form a cylindrical end, and the upper surface of the truncated cone end and the side wall form an included angle of 120 degrees; the lower surface of the cylindrical end is coated with an optical coating, and the periphery of the edge of the optical coating is uniformly provided with three light guide holes;
the sealing structure comprises a base and a top cover, wherein a circular groove matched with the cylindrical end is formed in the center of the bottom of the base, three optical fiber holes corresponding to the light guide holes are formed in the inner side of the circular groove, and the optical fiber holes penetrate through the base upwards; the upper part of the side wall of the base is provided with an external thread; the top cover comprises a circular ring and a circular wall which are integrally formed, the center of the circular ring comprises a first slotted hole and a second slotted hole which are concentric, the first slotted hole is larger than the second slotted hole, a gasket is arranged in the first slotted hole, and the first slotted hole and the second slotted hole are matched with the side wall of the circular table end; the circular wall is evenly provided with a plurality of overflowing grooves, the position, close to the overflowing grooves, of the circular ring is fixedly connected with the bottom of the base through screws, and the truncated cone-shaped prism is fixed among the circular groove, the first slotted hole and the second slotted hole.
2. The truncated cone prism with a sealing structure according to claim 1, wherein the optical coating film comprises an inner high-purity silver film and a surface protective film, and the thicknesses of the high-purity silver film and the protective film are both greater than 50 μm.
3. The hermetically sealed truncated prism of claim 1, wherein the truncated prism is made of a high purity sapphire material having a refractive index of 1.77.
4. The truncated cone prism with the sealing structure according to claim 1, wherein the diameter of the cross section of the cylindrical end is 12mm, the diameters of the light guide holes are all 2mm and are uniformly distributed along the circumference with the diameter of 9mm, the height of the cylindrical end is 2.5mm, and the height of the truncated cone end is 5.2 mm.
5. The truncated cone prism of claim 1, wherein the concentricity of the cylindrical end and the truncated cone end is 0.01 or less, and the parallelism of the lower surface of the cylindrical end and the upper surface of the truncated cone end is 0.01 or less.
6. The frustum-shaped prism with a sealing structure of claim 1, wherein the outer surface of the side wall of the cylindrical end is frosted.
7. The prism of claim 1, wherein the top cover and the base are made of food grade stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920384383.5U CN210038303U (en) | 2019-03-25 | 2019-03-25 | Truncated cone prism with sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920384383.5U CN210038303U (en) | 2019-03-25 | 2019-03-25 | Truncated cone prism with sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210038303U true CN210038303U (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920384383.5U Active CN210038303U (en) | 2019-03-25 | 2019-03-25 | Truncated cone prism with sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210038303U (en) |
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2019
- 2019-03-25 CN CN201920384383.5U patent/CN210038303U/en active Active
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