CN113285208B - Fluorescent antenna with light trapping structure and manufacturing method thereof - Google Patents
Fluorescent antenna with light trapping structure and manufacturing method thereof Download PDFInfo
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- CN113285208B CN113285208B CN202110411711.8A CN202110411711A CN113285208B CN 113285208 B CN113285208 B CN 113285208B CN 202110411711 A CN202110411711 A CN 202110411711A CN 113285208 B CN113285208 B CN 113285208B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims abstract description 57
- 239000000463 material Substances 0.000 claims description 15
- 239000000084 colloidal system Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000003491 array Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- ZLWLTDZLUVBSRJ-UHFFFAOYSA-K chembl2360149 Chemical compound [Na+].[Na+].[Na+].O=C1C(N=NC=2C=CC(=CC=2)S([O-])(=O)=O)=C(C(=O)[O-])NN1C1=CC=C(S([O-])(=O)=O)C=C1 ZLWLTDZLUVBSRJ-UHFFFAOYSA-K 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/02—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Light Receiving Elements (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention discloses a fluorescent antenna with a light trapping structure and a manufacturing method thereof, wherein the fluorescent antenna comprises an optical filter, a fluorescent body, a white board and a receiver; one surface of the optical filter is provided with a light guide array, the light guide array comprises a plurality of light guide posts, the light guide posts are obliquely arranged from front to back, an included angle between one end of each light guide post, which is far away from the optical filter, and a horizontal plane is alpha, the width of the end part of the light guide post, which is connected with the optical filter, is D 1, the width of the end part of each light guide post, which is far away from the optical filter, is D 2,D1 and is larger than D 2, and one surface of the optical filter, which is far away from the light guide array, is coated with a filter film; the top surface of fluorescence body corresponds the light guide array and is equipped with a plurality of recesses, and the shape and the degree of depth of recess match with the light guide post, and the light filter covers the top surface of fluorescence body, and the light guide post stretches into in the recess, and the refracting index of light guide array is greater than the refracting index of fluorescence body, and the whiteboard is attached in front end, rear end, both sides and the bottom surface of fluorescence body respectively, and the receiver is connected with the front end of fluorescence body.
Description
Technical Field
The invention relates to the technical field of visible light communication, in particular to a fluorescent antenna with a light trapping structure and a manufacturing method thereof.
Background
With the continuous development of an intelligent society, the interconnection and intercommunication between vehicles are becoming more and more important. The use of vehicle lights for visible light communication is also an important component of the internet of vehicles. Because the light emitted by the car lamp often contains yellow light excited by YAG fluorescent powder, the bandwidth of the light is not high. In order to effectively use a lamp for optical communication, a fluorescent antenna has been proposed. However, the existing fluorescent antenna has a technical problem that the light trapping capability is not feasible, the incident light is easy to directly reflect, and the utilization rate is low. At the same time the excited signal is also easy to escape, thus reducing the gain.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a fluorescent antenna with a light trapping structure, solves the problem that the light trapping capacity of the existing fluorescent antenna is not feasible, and improves the utilization rate of incident signals, thereby improving the gain of the antenna.
Another object of the present invention is to provide a method for manufacturing the fluorescent antenna having the light trapping structure.
The technical scheme of the invention is as follows: a fluorescent antenna with a light trapping structure comprises a light filter, a fluorescent body, a white board and a receiver;
One surface of the optical filter is provided with a light guide array, the light guide array comprises a plurality of light guide posts, the light guide posts are obliquely arranged from front to back, an included angle between one end of each light guide post, which is far away from the optical filter, and a horizontal plane is alpha, the width of the end part of the light guide post, which is connected with the optical filter, is D 1, the width of the end part of each light guide post, which is far away from the optical filter, is D 2,D1 and is larger than D 2, and one surface of the optical filter, which is far away from the light guide array, is plated with a light filter film;
The top surface of fluorescence body corresponds the light guide array and is equipped with a plurality of recesses, and the shape and the degree of depth of recess match with the light guide post, and the light filter covers the top surface of fluorescence body, and the light guide post stretches into in the recess, and the refractive index of light guide array is greater than the refractive index of fluorescence body, and the blank is attached in front end, rear end, both sides and the bottom surface of fluorescence body respectively, and the receiver is connected with the front end of fluorescence body, and the front end of fluorescence body is covered jointly to receiver and blank. The light guide structure is arranged into a structure with a large top and a small bottom, the light guide structure has certain unidirectional light transmission capacity, the refractive index of the light guide array is larger than that of the fluorescent body surrounding the light guide array, an incident signal is continuously totally reflected in the light guide array and is emitted into the fluorescent body, the ratio of the forward light transmission capacity to the reverse light transmission capacity is S 2/S1,S1, the cross-sectional area of the end part of the light guide pillar, which is connected with the optical filter, and S 2, the cross-sectional area of the end part of the light guide pillar, which is far away from the optical filter. The filter film is a low-pass filter film and is mainly used for filtering light with larger wavelength in the incident signal and improving the bandwidth of the incident signal.
Further, the width of the fluorescent body is gradually increased from front to back, the white board surrounds the fluorescent body in a form of being narrow in front and wide in back, signals are continuously diffusely reflected, the signals are forced to a receiver positioned at the front end, the signals are collected, and the conversion rate and the signal gain of the incident signals are improved.
Further, the D 1 is less than 1000 microns and the D 2/D1 is 0.1-0.8.
Further, an included angle alpha between one end of the light guide column, which is away from the optical filter, and the horizontal plane is 10-45 degrees.
Further, the thickness of the fluorescent body is 1mm-8mm, and the length of the light guiding post is 10% -60% of the thickness of the fluorescent body.
Further, the whiteboard is made of BaSO 4 or CaCO 3.
Further, the optical filter is made of glass, silica gel or epoxy resin, and the refractive index of the optical filter is larger than that of the fluorescent body.
Further, the fluorescent body comprises a luminescent material and a colloid, the colloid is PDMS or OE6650, the luminescent material is CdSe or ZnS, and the fluorescence lifetime of the luminescent material is not more than 20ns.
The other technical scheme of the invention is as follows: the manufacturing method of the fluorescent antenna with the light trapping structure comprises the following steps:
Step S1: preparing an optical filter with a light guide array by using a light passing module, and plating an optical filter film on one surface of the optical filter, which is away from the light guide array;
Step S2: assembling the whiteboard and the receiver according to the shape of the required fluorescent body, so that a filling cavity is enclosed by the whiteboard and the receiver, and the shape of the filling cavity is consistent with that of the required fluorescent body;
step S3: adding liquid fluorescent material into the filling cavity, pressing the surface of the optical filter provided with the light guide array downwards into the liquid fluorescent material, and heating and curing to obtain the fluorescent antenna with the light trapping structure.
Further, in the step S3, the curing temperature is 60-90 ℃ and the curing time is 0.5-3 hours.
Compared with the prior art, the invention has the following beneficial effects:
The fluorescent antenna with the light trapping structure is used for optical communication of the Internet of vehicles, can collect signal light rays incident from the opposite vehicle lamp, filter yellow light in the signals, convert blue light in the signals into signals with specific wavelengths, collect the signals on a receiver with smaller area, and improve bandwidth and gain.
Drawings
Fig. 1 is a schematic structural diagram of a fluorescent antenna with a light trapping structure according to the present invention.
Fig. 2 is an exploded view of a fluorescent antenna with a light trapping structure according to the present invention.
Fig. 3 is a cross-sectional view of a fluorescent antenna with a light trapping structure according to the present invention.
Fig. 4 is an enlarged view of the encircled portion of fig. 3 in accordance with the present invention.
Fig. 5 is a schematic diagram of the reflection of an incident signal according to the present invention.
Fig. 6 is a structural comparison diagram of a fluorescent antenna with a light trapping structure according to the present invention with a general fluorescent antenna and a trapezoid fluorescent antenna.
Fig. 7 is a gain simulation diagram of the fluorescent antenna with a light trapping structure according to the present invention and a common fluorescent antenna and a trapezoid fluorescent antenna.
Fig. 8 is a schematic structural diagram of a fluorescent antenna with a light trapping structure according to embodiment 2 of the present invention.
The light guide column 101, the fluorescent body 200, the whiteboard 300, the receiver 400, and the optical filter 100.
Detailed Description
The present invention will be described in further detail with reference to examples, but embodiments of the present invention are not limited thereto.
Example 1
As shown in fig. 1 and 2, the present embodiment provides a fluorescent antenna with a light trapping structure, which includes a filter 100, a fluorescent body 200, a whiteboard 300, and a receiver 400.
As shown in fig. 1 and fig. 2, one surface of the optical filter is provided with a light guiding array, the light guiding array comprises a plurality of light guiding columns 101, the light guiding columns are obliquely arranged from front to back, as shown in fig. 3 and fig. 4, an included angle between one end of each light guiding column, which faces away from the optical filter, and a horizontal plane is alpha, alpha is 10-45 degrees, the width of the end of the joint of each light guiding column and the optical filter is D 1, the width of the end of each light guiding column, which faces away from the optical filter, is D 2,D1 to be larger than D 2, the surface, which faces away from the optical guiding array, of each optical filter is coated with a filter film, D 1 is smaller than 1000 micrometers, and D 2/D1 is 0.5. The light guide structure is arranged into a structure with a large top and a small bottom, the light guide structure has certain unidirectional light transmission capacity, the refractive index of the light guide array is larger than that of the fluorescent body surrounding the light guide array, an incident signal is continuously totally reflected in the light guide array and is emitted into the fluorescent body, the ratio of the forward light transmission capacity to the reverse light transmission capacity is S 2/S1,S1, the cross-sectional area of the end part of the light guide pillar, which is connected with the optical filter, and S 2, the cross-sectional area of the end part of the light guide pillar, which is far away from the optical filter.
As shown in fig. 3 and 4, the top surface of the fluorescent body is provided with a plurality of grooves corresponding to the light guiding arrays, the shape and depth of the grooves are matched with those of the light guiding columns, the optical filter covers the top surface of the fluorescent body, the light guiding columns extend into the grooves, the refractive index of the light guiding arrays is larger than that of the fluorescent body, the white board is respectively attached to the front end, the rear end, the two sides and the bottom surface of the fluorescent body, the receiver is connected with the front end of the fluorescent body, and the receiver and the white board jointly cover the front end of the fluorescent body. The thickness of the fluorescent body is 1mm-8mm, and the length of the light guiding post is 50% of the thickness of the fluorescent body. The whiteboard is made of BaSO 4, the optical filter is made of glass, silica gel or epoxy resin, and the refractive index of the optical filter is larger than that of the fluorescent body. The fluorescent body comprises a luminescent material and a colloid, wherein the colloid is PDMS, the luminescent material is CdSe, and the fluorescence lifetime of the luminescent material is not more than 20ns.
In this embodiment, one side of the optical filter is coated with a low-pass filter film, the fluorescent body can be in a shape of a truncated cone by a signal with a wavelength lower than 450nm, the fluorescent body is 3.5mm thick, the end width of the joint of the light guiding column and the optical filter is D 1 and 800 micrometers, the end width of the light guiding column far away from the optical filter is D 2 and 400 micrometers, the included angle alpha is 15 degrees, the length of the light guiding column is 1mm, the fluorescent body is in a trapezoid shape, the width of the fluorescent body gradually increases from front to back, the upper bottom of the trapezoid is 3mm, the lower bottom of the trapezoid is 20mm, and the height of the fluorescent body is 20mm.
The refractive index of the fluorescent body is lower than that of the light guide array, the light guide array points to the opposite direction of the receiver, so that the optical path of a signal in an antenna can be increased, the utilization rate of the signal is increased, and the gain is improved.
Compared with the common fluorescent antenna and the fluorescent antenna with the trapezoid structure, the fluorescent antenna with the light trapping structure has obvious advantages. The width of the fluorescent body is gradually increased from front to back, the white board surrounds the fluorescent body in a form of being narrow in front and wide in back, signals are continuously diffusely reflected and forced to the receiver, the signals are collected to the receiver, and the conversion rate and the signal gain of the incident signals are improved. The model schematic and simulation results are shown in fig. 6 and 7, respectively, with a larger gain than the latter two.
The manufacturing method of the fluorescent antenna with the light trapping structure comprises the following steps:
Step S1: preparing an optical filter with a light guide array by using a light passing module, and plating an optical filter film on one surface of the optical filter, which is away from the light guide array;
Step S2: assembling the whiteboard and the receiver according to the shape of the required fluorescent body, so that a filling cavity is enclosed by the whiteboard and the receiver, and the shape of the filling cavity is consistent with that of the required fluorescent body;
Step S3: adding liquid fluorescent material into the filling cavity, pressing the surface of the optical filter provided with the light guide array downwards into the liquid fluorescent material, heating and curing at 90 ℃ for 1 hour to obtain the fluorescent antenna with the light trapping structure.
Example 2
The difference between this embodiment and embodiment 1 is that the cross section of the end of the light guiding post where the light guiding post is connected to the optical filter is circular, the width D 1 is 800 micrometers, the cross section of the end of the light guiding post far from the optical filter is square, and the width D 2 is 240 micrometers.
Example 3
The difference between this embodiment and embodiment 1 is that, as shown in fig. 8, the fluorescent body is semi-elliptical, with a narrow front end and a wide rear end.
As described above, the present invention can be better realized, and the above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; all equivalent changes and modifications are intended to be covered by the scope of the appended claims.
Claims (9)
1. The fluorescent antenna with the light trapping structure is characterized by comprising a light filter, a fluorescent body, a white board and a receiver;
One surface of the optical filter is provided with a light guide array, the light guide array comprises a plurality of light guide posts, the light guide posts are obliquely arranged from front to back, an included angle between one end of each light guide post, which is far away from the optical filter, and a horizontal plane is alpha, the width of the end part of the light guide post, which is connected with the optical filter, is D 1, the width of the end part of each light guide post, which is far away from the optical filter, is D 2,D1 and is larger than D 2, and one surface of the optical filter, which is far away from the light guide array, is plated with a light filter film;
The top surface of the fluorescent body is provided with a plurality of grooves corresponding to the light guide arrays, the shape and depth of the grooves are matched with those of the light guide columns, the optical filter covers the top surface of the fluorescent body, the light guide columns extend into the grooves, the refractive index of the light guide arrays is larger than that of the fluorescent body, the white board is respectively attached to the front end, the rear end, the two sides and the bottom surface of the fluorescent body, the receiver is connected with the front end of the fluorescent body, and the front end of the fluorescent body is jointly covered by the receiver and the white board;
The fluorescent body is trapezoid, and the width of the fluorescent body is gradually increased from front to back.
2. The fluorescent antenna with a notch structure of claim 1, wherein D 1 is less than 1000 microns and D 2/D1 is 0.1-0.8.
3. The fluorescent antenna with light trapping structure of claim 1, wherein an angle α between an end of the light guiding post facing away from the optical filter and a horizontal plane is 10 ° -45 °.
4. The fluorescent antenna with light trapping structure of claim 1, wherein the thickness of the fluorescent body is 1mm-8mm, and the length of the light guiding post is 10% -60% of the thickness of the fluorescent body.
5. The fluorescent antenna with the light trapping structure of claim 1, wherein the white board is made of BaSO 4 or CaCO 3.
6. The fluorescent antenna with the light trapping structure according to claim 1, wherein the optical filter is made of glass, silica gel or epoxy resin, and the refractive index of the optical filter is larger than that of the fluorescent body.
7. The fluorescent antenna with light trapping structure of claim 1, wherein the fluorescent body comprises a luminescent material and a colloid, the colloid is PDMS or OE6650, the luminescent material is CdSe or ZnS, and the fluorescent lifetime of the luminescent material is not more than 20ns.
8. The method of manufacturing a fluorescent antenna with a light trapping structure according to any one of claims 1-7, comprising the steps of:
Step S1: preparing an optical filter with a light guide array by using a light passing module, and plating an optical filter film on one surface of the optical filter, which is away from the light guide array;
Step S2: assembling the whiteboard and the receiver according to the shape of the required fluorescent body, so that a filling cavity is enclosed by the whiteboard and the receiver, and the shape of the filling cavity is consistent with that of the required fluorescent body;
step S3: adding liquid fluorescent material into the filling cavity, pressing the surface of the optical filter provided with the light guide array downwards into the liquid fluorescent material, and heating and curing to obtain the fluorescent antenna with the light trapping structure.
9. The method of manufacturing a fluorescent antenna with a light trapping structure according to claim 8, wherein in the step S3, the curing temperature is 60-90 ℃ and the curing time is 0.5-3 hours.
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| JP3457591B2 (en) * | 1999-10-08 | 2003-10-20 | インターナショナル・ビジネス・マシーンズ・コーポレーション | Liquid crystal display |
| KR102113631B1 (en) * | 2013-12-31 | 2020-05-21 | 엘지디스플레이 주식회사 | Liquid crystal display device and method for fabricating the same |
| KR102489587B1 (en) * | 2015-10-12 | 2023-01-17 | 엘지디스플레이 주식회사 | Optical Source Unit and Display Device Using the Same |
| CN109781250B (en) * | 2019-01-28 | 2020-04-14 | 南京奥谱依电子科技有限公司 | Photosensitive imaging detection chip based on tip electron fluorescence excitation and preparation method thereof |
| CN111916989A (en) * | 2020-07-06 | 2020-11-10 | 华南理工大学 | Fluorescent element with light guide structure and preparation method thereof |
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