CN109975945B - Round table-shaped prism with sealing structure - Google Patents
Round table-shaped prism with sealing structure Download PDFInfo
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- CN109975945B CN109975945B CN201910225116.8A CN201910225116A CN109975945B CN 109975945 B CN109975945 B CN 109975945B CN 201910225116 A CN201910225116 A CN 201910225116A CN 109975945 B CN109975945 B CN 109975945B
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- Prior art keywords
- truncated cone
- shaped prism
- sealing structure
- circular
- base
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- 238000007789 sealing Methods 0.000 title claims abstract description 25
- 230000003287 optical effect Effects 0.000 claims abstract description 21
- 239000013307 optical fiber Substances 0.000 claims abstract description 19
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 229910052594 sapphire Inorganic materials 0.000 claims description 3
- 239000010980 sapphire Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 9
- 238000002835 absorbance Methods 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 3
- 235000013361 beverage Nutrition 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010183 spectrum analysis Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000005102 attenuated total reflection Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- -1 aldehyde ketone Chemical class 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 235000019990 fruit wine Nutrition 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 235000014101 wine Nutrition 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/1805—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for prisms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a truncated cone-shaped prism with a sealing structure, which comprises a truncated cone-shaped prism and a sealing structure; the truncated cone-shaped prism comprises a truncated cone end, the bottom of the truncated cone end outwards extends to form a cylindrical end, and the upper surface of the truncated cone end forms an included angle of 120 degrees with the side wall; the lower surface of the cylindrical end is covered with an optical coating, and three light guide holes are uniformly formed in the circumference of the edge of the optical coating; 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 external threads; the top cover comprises an integrally formed circular ring and a circular wall, 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 round platform end; the annular wall is uniformly provided with a plurality of flow grooves, and has the advantages of simple structure, low cost, good stability, strong anti-interference capability and high sensitivity.
Description
Technical Field
The invention belongs to the technical field of optical prisms, and particularly relates to a truncated cone-shaped prism with a sealing structure.
Background
In the automatic production process of food and drink such as brewing, fermentation, beverage, edible oil, etc., the concentration or content of one or more specific substance components in the product needs to be monitored rapidly and online in real time. The spectrum analysis technology has the advantages of rapidness, no damage, simplicity, convenience and accuracy, and is applied to the online monitoring of fruit wine, beer, wine, beverage, milk and other food and beverage; the development of miniaturized on-line monitoring instruments for sugar, alcohol content, acid, ester, aldehyde ketone and the like by utilizing a spectrum analysis technology can be widely applied to on-line monitoring in the production process of domestic foods 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.
Disclosure of Invention
The invention aims to provide a truncated cone-shaped prism with a sealing structure, which solves the problems that the existing optical prism is difficult to process and inconvenient to install, time and labor are wasted in use, and meanwhile, the measurement accuracy is affected.
The invention provides the following technical scheme:
A truncated cone-shaped prism with a sealing structure comprises a truncated cone-shaped prism and a sealing structure; the truncated cone-shaped prism comprises a truncated cone end, the bottom of the truncated cone end outwards extends to form a cylindrical end, and the upper surface of the truncated cone end forms an included angle of 120 degrees with the side wall; the lower surface of the cylindrical end is covered with an optical coating, and the circumference of the edge of the optical coating is uniformly provided with light guide holes; the sealing structure comprises a base and a top cover, 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 external threads; the top cover comprises an integrally formed circular ring and a circular wall, the center of the circular ring comprises a first groove hole and a second groove hole which are concentric, the first groove hole is larger than the second groove hole, a gasket is arranged in the first groove hole, and the first groove hole and the second groove hole are matched with the side wall of the round platform end; the circular ring is characterized in that a plurality of through-flow grooves are uniformly formed in the annular wall, the position, close to the through-flow grooves, of the circular ring is fixedly connected with the bottom of the base through screws, and the circular truncated cone-shaped prism is fixed between the circular groove, the first groove hole and the second groove hole.
Further, the optical coating comprises an inner layer of high-purity silver film and a surface layer of protective film, wherein the thicknesses of the high-purity silver film and the protective film are both larger than 50um.
Further, the truncated cone-shaped prism is made of a high-purity sapphire material with a refractive index of 1.77.
Further, the diameter of the section of the cylindrical end is 12mm, the diameters of the light guide holes are 2mm and are uniformly distributed along the circumference of which the diameter is 9mm, the height of the cylindrical end is 2.5mm, and the height of the round platform end is 5.2mm.
Further, the concentricity of the cylindrical end and the round platform end is smaller than or equal to 0.01, and the parallelism of the lower surface of the cylindrical end and the upper surface of the round platform end is smaller than or equal to 0.01.
Further, 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 beneficial effects of the invention are as follows:
The invention relates to a truncated cone-shaped prism with a sealing structure, which comprises a truncated cone end, wherein the bottom of the truncated cone end outwards extends to form a cylindrical end, and the upper surface of the truncated cone end forms an included angle of 120 degrees with the side wall; the lower surface of the cylindrical end is covered with an optical coating, and three light guide holes are uniformly formed in the circumference of the edge of the optical coating; 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 an integrally formed circular ring and a circular wall, the center of the circular ring comprises a first groove hole and a second groove hole which are concentric, a plurality of through grooves are uniformly formed in the circular wall, and a truncated cone-shaped prism is fixed among the circular groove, the first groove hole and the second groove hole; the safety of the inner circular truncated cone-shaped prism is protected through the annular wall, the entering of the liquid to be tested can be guaranteed through the flow through groove, and meanwhile, the circular groove, the first groove hole and the second groove hole guarantee the stable installation of the circular truncated cone-shaped prism;
Experiments and ATR theory prove that the concentration and absorbance have a good linear relationship, so that the light passing rate of the truncated cone-shaped prism is improved through reflection of the optical coating, the signal to noise ratio is improved, the anti-interference capability is high, and the sensitivity is high.
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 the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-section of a truncated cone prism and a schematic view of light;
FIG. 3 is a schematic view of a truncated cone prism ground and light rays;
FIG. 4 is a table of experimental data-alcohol concentration versus absorbance;
FIG. 5 is a graph of the table of FIG. 4;
marked in the figure as: 1. the light guide plate comprises a truncated cone-shaped prism, an 11 truncated cone end, a 12 cylindrical end, a 13 light guide hole, a2 sealing structure, a 3 base, a 31 circular groove, a 32 optical fiber hole, a 33 external thread, a 4 top cover, a 41 circular ring, a 42 circular wall, a 43 first slotted hole, a 44 second slotted hole, a 45 gasket, a 46 overflow groove, a 5 incident light ray and a 6 return light ray.
Detailed Description
As shown in fig. 1, a truncated cone-shaped prism with a sealing structure comprises a truncated cone-shaped prism and a sealing structure; the truncated cone-shaped prism comprises a truncated cone end, the bottom of the truncated cone end outwards extends to form a cylindrical end, and the upper surface of the truncated cone end forms an included angle of 120 degrees with the side wall; the lower surface of the cylindrical end is covered with an optical coating, and the circumference 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 a high-purity silver film of an inner layer and a protective film of a surface layer, and the thicknesses of the high-purity silver film and the protective film are both larger than 50um; the truncated cone-shaped 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 truncated cone end is 5.2mm; the concentricity of the cylindrical end and the round platform 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 round platform 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 arranged in the center of the bottom of the base, three optical fiber holes corresponding to the light guide holes are respectively arranged on 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 external threads; the top cover comprises an integrally formed circular ring and a circular wall, 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 round platform end; a plurality of through-flow grooves are uniformly formed in the annular wall, the position, close to the through-flow grooves, of the annular ring is fixedly connected with the bottom of the base through screws, the circular truncated cone-shaped prism is fixed between the circular groove, the first groove hole and the second groove hole, and the top cover and the base are made of food-grade stainless steel materials.
As shown in fig. 2-3, defining one light guide hole as an entrance hole and the other two light guide holes as return holes, wherein 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; the base is arranged on the top of a probe of a spectrum analyzer (such as a V-1800 visible spectrophotometer) through external threads, and an emitting optical fiber and an incident optical fiber are respectively connected to an optical fiber hole; placing the probe into the liquid to be measured, and covering the surface of the truncated cone-shaped prism by the liquid to be measured through the overflow hole; the optical system with multiple reflections is used for emitting light, the light enters the liquid to be detected from the side wall of the circular truncated cone end through the emitting optical fiber and the incident hole, total reflection occurs on the surface of the liquid to be detected, the reflected light returns to the circular truncated cone-shaped prism, then the light is continuously reflected among the optical coating of the circular truncated cone-shaped prism, the contact surface of the circular truncated cone end and the liquid to be detected, and finally the light enters the return hole and returns through the receiving optical fiber;
It is known from ATR (attenuated total reflection ) that infrared light emitted from a light source is projected onto a sample surface having a small refractive index through a crystal having a large refractive index, and when the incident angle is larger than a critical angle, the incident light is totally reflected. In fact, the infrared light is not totally reflected, but penetrates to a certain depth into the surface of the sample and then returns to the surface in the process, the sample is selectively absorbed in the incident light frequency region, the reflected light intensity is weakened, and a graph similar to the transmission absorption is generated, so that the structural information of the chemical composition of the surface layer of the sample is obtained.
According to the specific implementation mode, the principle is adopted, near infrared light 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 returned light of the receiving optical fiber is analyzed by a spectrum analyzer, the absorbance of the liquid to be detected is obtained, and finally, the following data are obtained, such as the relation between the concentration of the liquid to be detected and an absorbance curve, as shown in figures 4-5; and concludes as follows: 1) The infrared spectrum has a strong absorption effect on the reflecting surface, which indicates that the total penetration depth of the liquid to be tested is increased after the light rays are subjected to multiple reflection by the truncated cone-shaped prism; 2) The concentration and absorbance are in a good linear relation, which shows that the truncated cone prism improves the light passing rate through the reflection of the optical coating, thereby improving the signal to noise ratio, having stronger anti-interference capability and higher sensitivity.
The foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The circular truncated cone-shaped prism with the sealing structure is characterized by comprising a circular truncated cone-shaped prism and the sealing structure;
The truncated cone-shaped prism comprises a truncated cone end, the bottom of the truncated cone end outwards extends to form a cylindrical end, and the upper surface of the truncated cone end forms an included angle of 120 degrees with the side wall; the lower surface of the cylindrical end is covered with an optical coating, and three light guide holes are uniformly formed in the circumference of the edge of the optical coating;
The sealing structure comprises a base and a top cover, 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 external threads; the top cover comprises an integrally formed circular ring and a circular wall, the center of the circular ring comprises a first groove hole and a second groove hole which are concentric, the first groove hole is larger than the second groove hole, a gasket is arranged in the first groove hole, and the first groove hole and the second groove hole are matched with the side wall of the round platform end; the circular ring is characterized in that a plurality of through-flow grooves are uniformly formed in the annular wall, the position, close to the through-flow grooves, of the circular ring is fixedly connected with the bottom of the base through screws, and the circular truncated cone-shaped prism is fixed between the circular groove, the first groove hole and the second groove hole.
2. The truncated cone-shaped prism with a sealing structure according to claim 1, wherein the optical coating film comprises an inner silver film and a surface protective film, and the thicknesses of the silver film and the protective film are both larger than 50um.
3. The truncated cone-shaped prism with a sealing structure according to claim 1, wherein the truncated cone-shaped prism is made of a sapphire material with a refractive index of 1.77.
4. The truncated cone-shaped prism with a sealing structure according to claim 1, wherein 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 truncated cone end is 5.2mm.
5. The truncated cone-shaped prism with a sealing structure according to claim 1, wherein concentricity of the cylindrical end and the truncated cone end is less than or equal to 0.01, and parallelism of the lower surface of the cylindrical end and the upper surface of the truncated cone end is less than or equal to 0.01.
6. The truncated cone-shaped prism with a sealing structure according to claim 1, wherein the outer surface of the side wall of the cylindrical end is a frosted structure.
7. The truncated cone-shaped prism with a sealing structure according to claim 1, wherein the top cover and the base are made of food-grade stainless steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225116.8A CN109975945B (en) | 2019-03-25 | 2019-03-25 | Round table-shaped prism with sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225116.8A CN109975945B (en) | 2019-03-25 | 2019-03-25 | Round table-shaped prism with sealing structure |
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| Publication Number | Publication Date |
|---|---|
| CN109975945A CN109975945A (en) | 2019-07-05 |
| CN109975945B true CN109975945B (en) | 2024-06-28 |
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| CN201910225116.8A Active CN109975945B (en) | 2019-03-25 | 2019-03-25 | Round table-shaped prism with sealing structure |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210038303U (en) * | 2019-03-25 | 2020-02-07 | 南京帕克光电科技有限公司 | Truncated cone prism with sealing structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19856591C2 (en) * | 1998-12-08 | 2001-03-08 | Basf Ag | Device for the spectroscopic analysis of a fluid medium by means of attenuated reflection |
| JP2010048638A (en) * | 2008-08-21 | 2010-03-04 | Yuji Matsuura | Infrared-spectroscopic probe |
| CN103454729B (en) * | 2013-09-12 | 2016-01-20 | 电子科技大学 | A kind of spaceborne space optical switch and implementation method |
| FR3015677B1 (en) * | 2013-12-23 | 2016-01-29 | Commissariat Energie Atomique | METHOD AND DEVICE FOR PREPARING AND OPTICALLY ANALYZING A SOLID SAMPLE SUBJECTED TO A CONTROLLED ENVIRONMENT BY INFRARED SPECTROMETRY WITH MULTIPLE INTERNAL REFLECTIONS |
| CN207600635U (en) * | 2017-12-04 | 2018-07-10 | 苏州精创光学仪器有限公司 | Novel seal prism jig |
| CN108489899A (en) * | 2018-02-13 | 2018-09-04 | 中国海洋石油集团有限公司 | A kind of fluid reflected light measurement device |
| CN109507150B (en) * | 2018-10-19 | 2021-05-14 | 南京帕克光电科技有限公司 | Wide-range insertion type turbidity monitoring probe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210038303U (en) * | 2019-03-25 | 2020-02-07 | 南京帕克光电科技有限公司 | Truncated cone prism with sealing structure |
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