CN112240536A - Light source device, light guide, and method for manufacturing light guide - Google Patents
Light source device, light guide, and method for manufacturing light guide Download PDFInfo
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- CN112240536A CN112240536A CN201910640853.4A CN201910640853A CN112240536A CN 112240536 A CN112240536 A CN 112240536A CN 201910640853 A CN201910640853 A CN 201910640853A CN 112240536 A CN112240536 A CN 112240536A
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Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0003—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being doped with fluorescent agents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Abstract
A light source device, a light guide and a manufacturing method of the light guide are provided, the light guide comprises a transparent tube (100) and a light guide medium (200) arranged in the transparent tube, the light guide medium comprises a bonding material (210) and fluorescent powder (220), and the distance between the bonding material and the transparent tube is less than 780 nm. The invention selects the adhesive material and the transparent tube with similar refractive indexes, and then the slurry containing the fluorescent powder and the adhesive material is solidified in the smooth transparent tube, so that the transparent tube can provide a smooth surface after the auxiliary light guide medium is formed, and the outer wall of the transparent tube is used as the side surface of the light guide, and the surface of the light guide medium is not required to be polished, thereby simplifying the preparation process of the light guide.
Description
Technical Field
The invention relates to a light source device, a light guide and a manufacturing method of the light guide, and belongs to the technical field of light transmission.
Background
Rod-like or linear luminous bodies are widely used in the fields of illumination, warning, decoration, etc., and can be classified into two types, i.e., chemiluminescence and electroluminescence, according to the principle of luminescence. Chemical-based glow sticks are activated by exciting a light-emitting chemical reaction within the assembly, typically by bending a flexible plastic tube thereby breaking apart a frangible separator within the tube and allowing the various chemicals to react. Once the chemical reaction has begun, it cannot be stopped until the reaction is complete. Chemiluminescent-based glow sticks are used only once, are incapable of repeated excitation and de-excitation, and are not well suited for use as an illumination or glow signal. Rod-shaped or wire-shaped luminophores based on electroluminescence, which are generally made of glass tubes filled with an electroluminescent gas, glow brightly when an electric current is applied, and can emit light of different colors by changing the gas used and the fluorescent coating applied to the surface of the tube. Electroluminescent based glow sticks or wires can be activated and deactivated, are suitable for use as a glow signal and are well suited for placement in other devices such as automobiles. However, such rod-shaped or wire-shaped light emitters generally require high voltages for excitation and are not well suited for use in small portable devices.
For reasons of long service life and power saving, it is a common trend to use light emitting diodes as rod-shaped or linear light emitters for illumination, warning, decoration, and the like. A rod-shaped or linear light emitter in the form of a light emitting diode is generally a linear or rod-shaped light source obtained by arranging a plurality of diodes in a line and emitting light from the linearly arranged diodes under the control of a touch circuit. At present, a linear or bar-shaped light source in the form of a light emitting diode is used as a brake lamp, a turn signal lamp, a decorative lamp in a vehicle and the like of an automobile, but the light emitting diode has the phenomenon of sudden efficiency reduction along with the temperature rise, a plurality of light emitting diodes are needed to be used as a linear or bar-shaped light emitting body in the form of the light emitting diode, the whole light emitting body fails when a single light emitting diode fails, and in addition, the linear or bar-shaped light source in the form of the light emitting diode has the problems of lower intensity, poorer uniformity and softness.
Disclosure of Invention
The invention aims to solve the technical problem of providing a light source device, a light guide and a manufacturing method of the light guide, wherein a bonding material and a transparent tube with similar refractive indexes are selected, and then slurry containing fluorescent powder and the bonding material is solidified in the smooth transparent tube, so that the transparent tube can provide a smooth surface after an auxiliary light guide medium is formed, the outer wall of the transparent tube is used as the side surface of the light guide, and the surface of the light guide medium is not required to be polished, thereby simplifying the manufacturing process of the light guide.
The technical problem to be solved by the invention is realized by the following technical scheme:
the invention provides a light guide, which comprises a transparent tube and a light guide medium arranged in the transparent tube, wherein the light guide medium comprises a bonding material and fluorescent powder, and the distance between the bonding material and the transparent tube is less than 780 nm.
In order to achieve the total reflection effect, the roughness of the inner wall and the roughness of the outer wall of the transparent tube are both less than 100 nm.
In order to match the transparent tube with the bonding material and avoid the influence of the bonding material on the performance of the fluorescent powder, the transparent tube is made of a material with the transmittance of a visible light region being more than 70%; the transmittance of the bonding material in a visible light region is more than 70%.
Specifically, the transparent tube is made of glass, sapphire, polymethyl methacrylate or polycarbonate; the bonding material is glass, silica gel or light-cured glue.
Further, the transparent tube and the adhesive material have refractive indices different by less than 0.2.
In order to meet the requirements of the luminous brightness at different distances, the concentration distribution of the fluorescent powder in the binding material is uniform distribution or gradient concentration.
In order to make the light guide have a light filtering function, the material of the transparent tube is colored glass. Alternatively, the light-guiding medium further comprises dye molecules.
To obtain a light guide of a specific wavelength, a tubular dichroic sheet or film is arranged outside the transparent tube of the light guide.
In order to obtain a strip-like or band-like light guide, a transparent tube of said light guide is provided with a reflective element arranged partially around the transparent tube.
The invention also provides a light source device, which comprises an excitation light source and a light guide, wherein the light guide is the light guide, the light guide comprises at least one incident surface, and the excitation light source is arranged close to the incident surface of the light guide.
In order to further improve the uniformity of the emitted light, one end of the light guide is an incident surface, and one end of the light guide, which is far away from the incident surface, is provided with a reflecting layer; or, both ends of the light guide are incidence surfaces, and the number of the exciting light sources is two, and the two exciting light sources are respectively arranged at both ends of the light guide.
The present invention also provides a method of manufacturing a light guide, the method comprising:
s10: mixing the fluorescent powder and the binding material to form slurry;
s20: ultrasonically cleaning the transparent tube and then drying;
s30: filling the transparent tube with the slurry;
s40: the slurry is cured to form the lightguide.
In summary, the invention selects the adhesive material and the transparent tube with similar refractive indexes, and then the slurry containing the fluorescent powder and the adhesive material is solidified in the smooth transparent tube, so that the transparent tube can provide a smooth surface after the auxiliary light guide medium is formed, and the outer wall of the transparent tube is used as the side surface of the light guide, so that the surface of the light guide medium is not required to be polished, and the preparation process of the light guide is simplified.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic view of a light guide according to an embodiment of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic diagram of a second light guide according to an embodiment of the present invention;
FIG. 4 is a sectional view taken along line B-B of FIG. 3;
FIG. 5 is a schematic diagram of a three-lightguide configuration according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along line C-C of FIG. 5;
FIG. 7 is a schematic diagram of a four-lightguide configuration according to an embodiment of the present invention;
FIG. 8 is a cross-sectional view taken along line D-D of FIG. 7;
fig. 9 is a schematic structural diagram of a light source device according to the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Example one
FIG. 1 is a schematic view of a light guide according to an embodiment of the present invention; fig. 2 is a sectional view taken along line a-a of fig. 1. As shown in fig. 1 and 2, the present invention provides a light guide, including a transparent tube 100 and a light guide medium 200 disposed in the transparent tube 100, where the light guide medium 200 includes a bonding material 210 and a fluorescent powder 220, the transparent tube 100 is preferably a transparent tube made of a material with a transmittance of a visible light region greater than 70%, such as glass, sapphire, PMMA (polymethyl methacrylate), PC (polycarbonate), and the like, and an inner wall and an outer wall of the transparent tube 100 are both smooth structures, specifically, a roughness thereof is preferably less than 100nm, so as to serve as a mold to assist molding of the light guide medium 200, and provide a smooth surface for achieving a total reflection effect. Considering that the transmittance of the transparent tube 100 in the visible region is not one hundred percent, it is preferable that the ratio of the thickness of the transparent tube 100 to the diameter of the light guide medium 200 (i.e., the thickness of the transparent tube 100 and the inner diameter of the transparent tube 100) is 1: 30-1: 3, preferably 1: 10.
the adhesive material 210 serves to adhere the phosphor 220 and to realize light conduction, in order to match the transparent tube 100 and avoid affecting the performance of the phosphor 220, the transmittance of the adhesive material 210 in the visible light region is greater than 70%, preferably, the transmittance is glass, silica gel or light curing gel, further, the difference between the refractive indexes of the adhesive material 210 and the transparent tube 100 is less than 0.2, preferably, the difference between the refractive indexes of the adhesive material 210 and the transparent tube 100 is less than 0.1, the distance between the adhesive material 210 and the transparent tube 100 is less than 780nm, since the wavelength range of visible light is 380nm to 780nm, when the distance between the adhesive material 210 and the transparent tube 100 is less than 780nm, so that the adhesive material 210 can come into optical contact when being in close contact with the transparent tube 100, i.e., the contact surface between the adhesive material 210 and the transparent tube 100 does not affect the light transmission, it is preferable that the distance between the adhesive material 210 and the transparent tube 100 is less than 380 nm. The phosphor 220 is preferably a phosphor particle that absorbs ultraviolet light or blue light and emits visible light.
The selection of the content and the type of the binder 210 and the phosphor 220 can be adjusted by those skilled in the art according to actual needs (such as the nature of the required output light), and the present invention is not limited thereto. The invention can also add some scattering particles such as Al in the corresponding position of the phosphor powder 2202O3，TiO2Etc. to accommodate different lighting requirements. For example, common phosphor powder YAG: Ce can be used, which can be excited by a blue light excitation light source to emit yellow light, and a part of unconverted blue light is combined to form white light, and the amount of blue light can be reduced or increased by adjusting the concentration of scattering particles and YAG: Ce, etc., to obtain light with a yellow color or a blue color.
In addition, the concentration distribution of the phosphor 220 in the binding material 210 may be set in various ways, such as uniform distribution or gradient concentration. Specifically, when the same kind of phosphor emits light of the same color, gradient concentration setting is performed on the phosphor in the length direction of the linear light source to meet the requirement of the emission brightness at different distances. Of course, the fluorescent powder with different colors and the corresponding concentration and distribution mode thereof can be arranged at different distance positions according to requirements, so that the requirements of different color light and brightness at different distance positions are met. For example, when a rod-shaped light source with uniform light emission is required and is excited from one end surface by an excitation light source, the concentration of the phosphor 220 needs to be gradually increased from the incident surface to the other surface.
The method of manufacturing the light guide in this embodiment is as follows:
s10: mixing the fluorescent powder and the binding material to form slurry;
s20: ultrasonically cleaning the transparent tube and then drying;
s30: filling the transparent tube with the slurry;
s40: the slurry is cured to form the lightguide.
In S10, there are various mixing manners, for example, when the adhesive material 210 is silica gel, thermosetting adhesive or photo-curing adhesive, the phosphor 220 and the precursor of the silica gel, thermosetting adhesive or photo-curing adhesive need to be mixed uniformly; when the bonding material 210 is made of glass, it is necessary to uniformly mix the glass powder containing the organic vehicle with the phosphor 220. The organic carrier can be prepared by mixing and dissolving ethyl cellulose, terpineol, butyl carbitol and butyl carbitol ester, or the organic carrier can also adopt acrylic resin. In S30, the transparent tube 100 is preferably filled with the paste by dispensing or injection molding. In S40, there are various curing methods, such as when the adhesive material 210 is a silicone adhesive or a thermosetting adhesive, the slurry is cured by heating; when the bonding material 210 adopts a photo-curing adhesive, the slurry is cured by means of exposure; when the bonding material 210 is made of glass, the slurry is cured (vitrified) by means of heat treatment, and in the curing process, the bonding material 210 containing the phosphor 220 after curing is ensured to be in optical contact with the inner wall of the transparent tube by regulating and controlling process parameters such as temperature, time and the like.
Since the refractive index of the adhesive material 210 of the light guide is close to that of the transparent tube 100 and the adhesive material 210 is in optical contact with the inner wall of the transparent tube 100 in the present invention, the outer wall of the transparent tube 100 can be used as the side surface of the entire light guide without polishing the surface of the adhesive material 210, thereby simplifying the manufacturing process of the light guide.
Example two
FIG. 3 is a schematic diagram of a second light guide according to an embodiment of the present invention; fig. 4 is a sectional view taken along line B-B of fig. 3. As shown in fig. 3 and 4, the light guide of the present embodiment has a light filtering function, compared to the first embodiment.
Specifically, the light guide medium 200 includes the dye molecules 230 in addition to the binder 210 and the phosphor 220, and the dye molecules 230 are added in the process of forming the paste in S10 to form the paste having the mixture of the dye molecules 230, the phosphor 220, and the binder 210. The skilled person can obtain a linear or rod-shaped light guide with a specific wavelength by adjusting the types and concentrations of the dye molecules 230 and the fluorescent powder 220. The dye molecules 230 are, among other things, color selective absorbing materials that function to absorb light at unwanted wavelengths, leaving light at desired wavelengths, thereby achieving a filtering effect, such as triarylmethane acid dyes, and the like.
Alternatively, a transparent tube 100 made of colored glass may be used to implement the corresponding filtering function.
Other structures of the light guide in this embodiment are the same as those in the first embodiment, and are not described herein again.
EXAMPLE III
FIG. 5 is a schematic diagram of a three-lightguide configuration according to an embodiment of the present invention; fig. 6 is a cross-sectional view taken along line C-C of fig. 5. As shown in fig. 5 and 6, in the present embodiment, a linear or rod-shaped light guide of a specific wavelength is obtained by providing a tubular dichroic sheet 300 (also called a bandpass sheet) or a dichroic film outside the transparent tube 100 of the light guide, so that the light guide has a light filtering function.
Specifically, a tubular dichroic filter 300 may be directly sleeved on the transparent tube 100, wherein the transparent tube 100 and the tubular dichroic filter 300 may be in close contact or have a certain gap. Further, the tubular dichroic sheet 300 and the transparent tube 100 may be integrated, that is, a dichroic film may be directly plated on the outer wall of the transparent tube 100 by vapor deposition or the like, thereby achieving a light filtering effect and obtaining a linear or rod-shaped light guide having a specific wavelength.
Due to the addition of the tubular dichroic filter 300 or dichroic film in this embodiment, the tubular dichroic filter 300 is arranged around the transparent tube 100 such that the side of the transparent tube 100 is covered by the tubular dichroic filter 300, thereby enabling filtering of the light emitted from the side of the light emitting light guide, resulting in a line or rod shaped light guide of a specific wavelength.
In addition, due to the bandpass characteristics of the dichroic sheet or film, a portion of the light that is not transmitted is reflected back into the light-guiding medium, exciting the phosphor to produce visible light of a particular wavelength. The light conversion efficiency is improved to a certain extent.
Other structures of the light guide in this embodiment are the same as those in the first embodiment, and are not described herein again.
Example four
FIG. 7 is a schematic diagram of a four-lightguide configuration according to an embodiment of the present invention; fig. 8 is a sectional view taken along line D-D of fig. 7. As shown in fig. 7 and 8, the present embodiment provides a strip-shaped or band-shaped light guide by providing a reflecting element 400 outside the transparent tube 100 of the light guide.
Specifically, the reflective element 400 is disposed partially around the transparent tube 100, i.e., the reflective element 400 does not surround the transparent tube 100 360 °, such that there is a portion of the transparent tube 100 along its length that is not wrapped by the reflective element 400. Compared with the first embodiment, the light exit surface in this embodiment is changed from the side surface of the entire light guide to the side surface of the light guide in the range corresponding to a certain central angle, so that a strip-shaped or bar-shaped light guide can be obtained. Preferably, the reflective element 400 is more than 90% reflective.
Other structures of the light guide in this embodiment are the same as those in the first embodiment, and the reflective element is a conventional technology, for example, a technical solution for defining the light surface by using a mirror is disclosed in WO2009/004597a2, and details thereof are not repeated here.
EXAMPLE five
Fig. 9 is a schematic structural diagram of a light source device according to the present invention. As shown in fig. 9, the present invention provides a light source device, which includes an excitation light source 500 and a light guide, wherein the excitation light source 500 is disposed at one end of the light guide near an incident surface. Preferably, the light source device further includes a lens 600, and the lens 600 is disposed between the excitation light source 500 and the light guide.
The excitation light source 500 may be an LED light source or a laser light source. The light guide is as described above.
When a laser light source is used as the excitation light source 500 and the light guide is used as the light guide in the first embodiment, the operation of the light source device in this embodiment is as follows:
the excitation light source 500 emits ultraviolet or blue laser, which is coupled by the lens 600 to obtain an incident beam L1, and the incident beam L1 enters the light guide through the incident surface 101. A portion of the incident light beam L1 interacts with the phosphor 220 and the interaction is divided into two types, the first type is light beam L2 absorbed by the phosphor 220 and converted into another wavelength, and the second type is light beam L4 scattered by the phosphor 220 particles so that the direction of the incident light beam changes. Another portion of the incident beam L1, which does not interact with phosphor 220, propagates in the original direction of propagation until it encounters the next phosphor 220 to react, as shown by beam L3.
Because the transparent tube 100 in the light guide is close to the light guide medium 200 in refractive index and keeps optical contact, the light beam L3 and the light beam L4 can reach the outer wall surface of the transparent tube 100, i.e., the side surface 102 of the light-emitting light guide, at the side surface 102, the light beam L3 and the light beam L4 which do not meet the total reflection condition directly escape from the side surface 102 of the light guide, and the part which meets the total reflection condition continuously propagates in the length direction of the light guide under the action of total reflection until being scattered by the next phosphor 220 particle. By regulating and controlling the parameters such as the concentration of the fluorescent powder 220 particles, a rod-shaped light source with strong luminous intensity, uniformity and softness can be obtained.
In order to further improve the light emission uniformity of the rod-shaped light source, a reflective layer may be disposed on one end surface 103 opposite to the incident surface 101, or another excitation light source 500 and a lens 600 may be disposed symmetrically with the excitation light source 500 and the lens 600 at the end surface 103, and the end surface 103 may be used as another incident surface, so as to obtain a uniform and soft rod-shaped light source.
In summary, the present invention provides a light source device, a light guide and a method for manufacturing the light guide, wherein a bonding material and a transparent tube having similar refractive indexes are selected, and then a slurry containing phosphor and the bonding material is cured in the smooth transparent tube, so that the transparent tube can provide a smooth surface after an auxiliary light guide medium is formed, and the outer wall of the transparent tube is used as the side surface of the light guide, and the surface of the light guide medium does not need to be polished, thereby simplifying the preparation process of the light guide.
Claims (12)
1. A light guide, characterized in that the light guide comprises a transparent tube (100) and a light guiding medium (200) arranged inside the transparent tube, the light guiding medium comprising a binding material (210) and a phosphor (220), the distance between the binding material and the transparent tube being less than 780 nm.
2. The light guide according to claim 1, wherein the roughness of both the inner and outer walls of the transparent tube (100) is less than 100 nm.
3. The light guide according to claim 1, wherein the transparent tube (100) is a transparent tube made of a material having a transmittance in the visible region of more than 70%; the bonding material (210) has a transmittance in the visible light region of greater than 70%.
4. A light guide as claimed in claim 3, characterized in that the material of the transparent tube (100) is glass, sapphire, polymethylmethacrylate or polycarbonate; the bonding material (210) is glass, silica gel or light-cured glue.
5. The light guide according to claim 4, wherein the transparent tube (100) and the bonding material (210) have refractive indices that differ by less than 0.2.
6. The light guide of claim 1, wherein the concentration of the phosphor (220) in the binder material (210) is either a uniform distribution or a graded concentration.
7. A light guide as claimed in claim 1, characterized in that the material of the transparent tube (100) is coloured glass; alternatively, the light-guiding medium (200) further comprises dye molecules (230).
8. A light guide as claimed in claim 1, characterized in that a tubular dichroic sheet (300) or dichroic film is provided outside the transparent tube (100) of the light guide.
9. A light guide as claimed in claim 1, characterized in that the transparent tube (100) of the light guide is provided with a reflective element (400) outside, which reflective element is arranged partly around the transparent tube.
10. A light source device, characterized in that the light source device comprises an excitation light source (500) and a light guide according to any of claims 1-9, the light guide comprising at least one entrance surface, the excitation light source being arranged adjacent to the entrance surface of the light guide.
11. The light source device of claim 10, wherein one end of the light guide is an incident surface, and an end of the light guide away from the incident surface is provided with a reflective layer;
or, both ends of the light guide are incidence surfaces, and the number of the exciting light sources is two, and the two exciting light sources are respectively arranged at both ends of the light guide.
12. A method of manufacturing a light guide, the method comprising:
s10: mixing the fluorescent powder and the binding material to form slurry;
s20: ultrasonically cleaning the transparent tube and then drying;
s30: filling the transparent tube with the slurry;
s40: the slurry is cured to form the lightguide.
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| CN201910640853.4A CN112240536A (en) | 2019-07-16 | 2019-07-16 | Light source device, light guide, and method for manufacturing light guide |
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| CN201910640853.4A CN112240536A (en) | 2019-07-16 | 2019-07-16 | Light source device, light guide, and method for manufacturing light guide |
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| CN112240536A true CN112240536A (en) | 2021-01-19 |
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Cited By (1)
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|---|---|---|---|---|
| WO2022245302A1 (en) * | 2021-05-19 | 2022-11-24 | Muanchart Mankaew | Lighting method for indoor cultivation |
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