CN111219652A - Optical fiber lighting device - Google Patents

Optical fiber lighting device Download PDF

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Publication number
CN111219652A
CN111219652A CN202010053044.6A CN202010053044A CN111219652A CN 111219652 A CN111219652 A CN 111219652A CN 202010053044 A CN202010053044 A CN 202010053044A CN 111219652 A CN111219652 A CN 111219652A
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CN
China
Prior art keywords
fluorescent
optical fiber
laser diode
light
fiber
Prior art date
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Pending
Application number
CN202010053044.6A
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Chinese (zh)
Inventor
上官剑锋
佟艳群
崔登杰
陈明阳
杨磊
马健
陈新
汪诗妍
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Jiangsu University
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Jiangsu University
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Filing date
Publication date
Application filed by Jiangsu University filed Critical Jiangsu University
Priority to CN202010053044.6A priority Critical patent/CN111219652A/en
Publication of CN111219652A publication Critical patent/CN111219652A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/10—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of the optical fibres type
    • 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
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • 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
    • F21Y2115/30—Semiconductor lasers

Abstract

The invention provides an optical fiber lighting device which is characterized by comprising a plurality of light source optical fiber coupling devices and a plurality of fluorescent optical fibers, wherein fluorescent agents are uniformly doped in the fluorescent optical fibers; the light source optical fiber coupling devices are connected through fluorescent optical fibers; the light source optical fiber coupling device comprises an air cooling system, a circuit control system, a laser diode and an optical fiber coupler, wherein the optical fiber coupler comprises a convex lens, a graded index rod lens and an optical filter which are sequentially arranged, the optical fiber coupler is used for coupling the laser diode and a fluorescent optical fiber, and the optical filter is a lens which has high reflectivity for light of a wave band generated by exciting fluorescent powder of the fluorescent optical fiber and high transmittance for light of the wave band generated by the laser diode. The invention solves the problem of visual fatigue caused by glare. The device has the advantages of low cost, good durability, safety, high efficiency, uniform light emission, soft light, no glare and beautiful lighting effect.

Description

Optical fiber lighting device
Technical Field
The invention belongs to the technical field of illumination, and particularly relates to an optical fiber illumination device.
Background
In the process of realizing the lighting project of the pedestrian path in life, the traditional sodium street lamp or LED street lamp is often used for realizing the illumination of the pedestrian path. The method is adopted to realize the illumination of the sidewalk, and trench digging, cable laying, lamp post installation and large-scale auxiliary equipment are needed. Therefore, the required investment cost is high, the construction period is long, the maintenance and the repair of the street lamp are difficult, and potential safety hazards such as electric leakage exist. Meanwhile, the defects of low utilization rate of the light source, serious light pollution, easy generation of visual fatigue and the like exist.
In order to solve the problem, people adopt a plurality of corresponding modes, wherein the design of an optical system is carried out, the shape of a reflecting cover is changed, and a micro lens is added to improve the lighting efficiency of the street lamp and reduce the generation of glare. The method improves the lighting efficiency of the street lamp and reduces the generation of glare to a certain extent, but does not obviously improve the defects of the traditional street lamp lighting, and also increases the related additional cost such as the cost of a microlens component and the like. Other illumination sources are used to illuminate the road. For example, the chinese utility model patent publication No. CN202275182U "a fluorescent optical fiber and a white light lamp made of the fluorescent optical fiber". The fluorescent optical fiber is characterized in that a layer of fluorescent powder layer is deposited on the surface of the optical fiber, the fluorescent powder layer is excited by light emitted by a light emitting diode to generate fluorescence, so that illumination is realized, and the light emitting angle is close to 360 degrees. However, this approach has several disadvantages:
① the phosphor layer is exposed outside and is susceptible to external environmental factors such as sunlight, weathering, and collision to cause the phosphor to leak and reduce its luminous efficiency.
② the fluorescent powder layer is on the surface of the optical fiber, and the light emitted by the light-emitting diode is transmitted in the optical fiber in a total reflection manner, so that the light emitted by the light-emitting diode is not easy to be absorbed by the fluorescent powder layer, thereby reducing the luminous efficiency.
③ the light emitting diode is transmitted in the optical fiber, and the light transmitted in the optical fiber is reduced rapidly with the increase of the distance of the optical fiber, so that the light emitted from the fluorescent powder layer near the light emitting diode is weak, and the light emitted from the fluorescent powder layer far from the light emitting diode is weak.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the optical fiber lighting device, which solves the problem of visual fatigue caused by glare, and has the advantages of low cost, good durability, safety, high efficiency, uniform light emission, soft light, no glare and attractive lighting effect.
The present invention achieves the above-described object by the following technical means.
An optical fiber lighting device is characterized by comprising a plurality of light source optical fiber coupling devices and a plurality of fluorescent optical fibers, wherein fluorescent agents are uniformly doped in the fluorescent optical fibers; the light source optical fiber coupling devices are connected through fluorescent optical fibers;
the light source optical fiber coupling device comprises an air cooling system, a circuit control system, a laser diode and an optical fiber coupler, wherein the laser diode is electrically connected with the circuit control system; the optical fiber coupler comprises a convex lens, a graded index rod lens and an optical filter which are sequentially arranged, the optical fiber coupler is used for coupling the laser diode and the fluorescent optical fiber, the convex lens is arranged at one end close to the laser diode, the optical filter is arranged at one end close to the fluorescent optical fiber, and the optical filter is a lens which has high reflectivity for wave band light generated by exciting a fluorescent agent of the fluorescent optical fiber and has high transmittance for the light of wave bands generated by the laser diode.
Furthermore, a reflecting film layer is arranged on one side of the circumference of the fluorescent optical fiber.
Furthermore, the central angle corresponding to the circumference of the fluorescent optical fiber coated by the reflecting film layer is 60-180 degrees.
Furthermore, the fluorescent optical fiber comprises a fiber core and a cladding, wherein the fiber core is made of PC transparent plastic doped with the fluorescent agent, and the cladding is coated outside the fiber core.
Further, the diameter of the fiber core is 20 mm; the thickness of the cladding is 1-1.5mm, and the refractive index of the cladding is smaller than that of the fiber core.
Further, the laser diode is a laser diode emitting blue light of 450nm, and the fluorescent agent in the fluorescent optical fiber is a yellow phosphorus fluorescent agent capable of being excited to generate yellow light of 540 nm; alternatively, the first and second electrodes may be,
the laser diode is used for emitting 350nm purple light, and the fluorescent agent in the fluorescent optical fiber is a fluorescent brightener capable of being excited to generate 450nm blue light; alternatively, the first and second electrodes may be,
the laser diode is used for emitting ultraviolet light of 254nm, and the fluorescent agent in the fluorescent optical fiber is Y capable of being excited to generate red light of 611nm2O3：Eu3+A fluorescent agent; alternatively, the first and second electrodes may be,
the laser diode is a laser diode emitting 254nm purple light, and the fluorescent agent in the fluorescent optical fiber is (La, Ce, Te) PO capable of generating 543nm green light by stimulated emission4A fluorescent agent.
Further, the cooling system is an air cooling system.
The invention has the following advantageous effects:
(1) because the fluorescent fibers are respectively provided with the same light emitting system from head to tail, the fluorescent agent in the fluorescent fibers is de-excited by laser to generate light illumination, and therefore, the light is soft, free of glare and capable of emitting light uniformly in a long distance.
(2) The fluorescent optical fiber of the lighting device is mainly transparent plastic, so the manufacturing cost is low. When in use, the road-shaped lamp can be directly paved on both sides of a road, the use is convenient, the installation time period is short, and the lamp posts are also saved.
(3) The light emitted by the lighting device is fluorescent light and emits light in a linear mode, so that the lighting device can be shaped into a certain shape to emit light, and the attractiveness of night scenes of sidewalks can be improved.
(4) Separates light from electricity, so the safety performance of the device is good.
(5) And vulnerable parts such as a cooling system, a circuit control system, a laser diode, an optical fiber coupler, an optical filter and the like are placed in a centralized manner, so that the detection and maintenance are easy.
Drawings
Fig. 1 is a schematic structural diagram of an optical fiber illumination device according to the present invention.
Fig. 2 is a schematic structural diagram of a light source and a fiber coupler according to the present invention.
FIG. 3 is a schematic cross-sectional view of a fluorescent optical fiber according to the present invention.
Reference numbers in the figures:
1. a light source fiber coupling device; 2. a cooling system; 3. a circuit control system; 4. a laser diode; 5. a fiber coupler; 51. a convex lens; 52. a graded index rod lens; 53. an optical filter; 6. a fluorescent optical fiber; 61. a fiber core; 62. a cladding layer; 63. a reflective film layer; 7. a sidewalk.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
Fig. 1 shows an optical fiber lighting device according to the present invention, which includes a plurality of light source optical fiber coupling devices 1 and a plurality of fluorescent optical fibers 6, wherein fluorescent agent is uniformly doped in the fluorescent optical fibers 6; the light source optical fiber coupling devices 1 are connected through fluorescent optical fibers 6.
The light source optical fiber coupling device 1 comprises an air cooling system 2, a circuit control system 3, a laser diode 4 and an optical fiber coupler 5, wherein the laser diode 4 is electrically connected with the circuit control system 3; the power of the laser and other parameters can be adjusted by the circuit control system 3. The cooling system 2 is an air cooling system, and is used for pumping out heat generated by the circuit control system 3 and the laser diode 4 and controlling the internal temperature of the light source optical fiber coupling device 1, so that the laser diode 4 is ensured to efficiently and stably output laser with specific wavelength.
As shown in fig. 2, the optical fiber coupler 5 includes a convex lens 51, a graded index rod lens 52, and an optical filter 53, which are arranged in sequence, the optical fiber coupler 5 is used for coupling the laser diode 4 and the fluorescent optical fiber 6, the convex lens 51 is located at one end close to the laser diode 4, and the optical filter 53 is located at one end close to the fluorescent optical fiber 6. The convex lens 51 focuses the laser emitted by the laser diode 4, the graded index rod lens 52 further focuses the laser spot into a small spot, and the laser enters the fluorescent optical fiber 6 after passing through the optical filter 53. The optical filter 53 is a lens which has high reflectivity to the light of the wave band generated by the excitation of the fluorescent agent of the fluorescent optical fiber 6 and high transmittance to the light of the wave band generated by the laser diode 4; it mainly lets laser more permeate through to prevent that the excitation light that produces in fluorescence optic fibre 6 from permeating through, reduce the loss, improve the utilization efficiency of excitation light.
The fluorescent optical fiber 6 comprises a fiber core 61 and a cladding 62, wherein the fiber core 61 is made of PC transparent plastic doped with a fluorescent agent, and the cladding 62 is coated outside the fiber core 61 to prevent the fiber core 61 from being damaged. The diameter of the fiber core 61 is 20 mm; the thickness of the cladding is 1-1.5mm, and the refractive index of the cladding 62 is smaller than that of the fiber core 61, so that the transmission of laser in the optical fiber is ensured.
And a reflection film layer 63 is arranged on one side of the circumference of the fluorescent optical fiber 6. The central angle corresponding to the circumference of the fluorescent optical fiber 6 coated by the reflecting film layer 63 is 60-180 degrees. The optical fiber lighting device is laid on two sides of the sidewalk 7, the reflective coating layer 63 faces the ground or the curbstone, and the uncoated area faces the inner side of the sidewalk. The head and the tail of the fluorescent optical fiber are respectively provided with the same light source optical fiber coupling device 1 so as to improve the illumination brightness and ensure the uniformity of the head and tail illumination brightness of the fluorescent optical fiber 6. Because the fluorescent optical fiber is made of plastic materials, different shapes can be manufactured for illumination in the laying process, and meanwhile, the fluorescent optical fiber emits fluorescent light with soft light. Therefore, the device can greatly improve the aesthetic property of night scene illumination of the sidewalk and also has the durability.
The laser diode 4 is a laser diode emitting blue light of 450nm, and the fluorescent agent in the fluorescent optical fiber 6 is a yellow phosphorus fluorescent agent capable of being excited to emit yellow light of 540 nm; alternatively, the first and second electrodes may be,
the laser diode 4 is a laser diode which emits 350nm purple light, and the fluorescent agent in the fluorescent optical fiber 6 is a fluorescent agent which can be excited to generate 450nm blue light; alternatively, the first and second electrodes may be,
the laser diode 4 is a laser diode emitting ultraviolet light of 254nm, and the fluorescent agent in the fluorescent optical fiber 6 is Y capable of generating red light of 611nm by excitation2O3：Eu3+A fluorescent agent; alternatively, the first and second electrodes may be,
the laser diode 4 is a laser diode emitting 254nm purple light, and the fluorescent agent in the fluorescent optical fiber 6 is (La, Ce, Te) PO capable of being excited to generate 543nm green light4A fluorescent agent.
The working principle of the optical fiber lighting device of the present invention is specifically illustrated below by taking the example that the laser diode 4 emits 450nm blue light and the fluorescent agent in the fluorescent optical fiber 6 is a yellow phosphor fluorescent agent capable of being excited to generate 540nm yellow light.
The light source optical fiber coupling devices 1 and the coupling connection fluorescent optical fibers 6 form a through light path and are paved at two sides of a sidewalk 7. The core 61 is made of PC transparent plastic material with the diameter of 20mm, the core is also doped with a yellow phosphorus fluorescent agent, and the cladding 62 is made of transparent plastic material with the refractive index smaller than that of the core. The coating range of the reflecting film layer 63 is 120 degrees, and the reflectivity of the reflecting film layer to yellow light with the wavelength of 540nm is 99 percent.
The circuit control system 3 generates a stable direct current signal to drive the laser diode 4 to stably output 450nm blue laser, the focal length of the convex lens 51 is 20mm, 450nm blue laser spots emitted by the laser diode 4 are focused, the outer diameter of the gradient refractive index rod lens 52 is 35mm, the laser spots are further focused into small spots, and the laser enters the fluorescent optical fiber 6 after passing through the optical filter 53. The yellow phosphor fluorescent agent uniformly doped in the fluorescent optical fiber 6 is excited to generate yellow light of 540 nm. The filter 53 is a filter with 99% transmittance to 450nm blue laser and 95% reflectance to 540nm yellow light, so as to improve the utilization efficiency of the yellow light.
The length of a typical sidewalk is often within 3000m and the width is between 0.5 and 3 m. Then in sidewalk illumination with a length of 3000m and a width of 3m, the laser power of the single light source fiber coupling device is required to be:
P＝μ*α*β÷(η*γ*ε*Km*N)＝45.7W
wherein, mu is 5lx, α is 3000m, β is 3m, η is 83.3%, gamma is 45.4%, epsilon is 0.954, K ism＝683，N＝4。
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.

Claims (7)

1. An optical fiber lighting device is characterized by comprising a plurality of light source optical fiber coupling devices (1) and a plurality of fluorescent optical fibers (6), wherein fluorescent agents are uniformly doped in the fluorescent optical fibers (6); the light source optical fiber coupling devices (1) are connected through fluorescent optical fibers (6);
the light source optical fiber coupling device (1) comprises an air cooling system (2), a circuit control system (3), a laser diode (4) and an optical fiber coupler (5), wherein the laser diode (4) is electrically connected with the circuit control system (3); the optical fiber coupler (5) comprises a convex lens (51), a graded index rod lens (52) and an optical filter (53) which are sequentially arranged, the optical fiber coupler (5) is used for coupling the laser diode (4) and the fluorescent optical fiber (6), the convex lens (51) is arranged at one end close to the laser diode (4), the optical filter (53) is arranged at one end close to the fluorescent optical fiber (6), and the optical filter (53) is a lens which has high reflectivity and high transmittance for light of a wave band generated by exciting fluorescent powder of the fluorescent optical fiber (6) and has high transmittance for light of the wave band generated by the laser diode (4).
2. A fiber optic illumination device according to claim 1, characterized in that a reflective film layer (63) is provided on one circumferential side of the fluorescent fiber (6).
3. The optical fiber illumination device according to claim 1, wherein the central angle corresponding to the circumference of the fluorescent optical fiber (6) coated by the reflective film layer (63) is 60 ° to 180 °.
4. The fiber illumination device according to claim 1, wherein the fluorescent fiber (6) comprises a fiber core (61) and a cladding (62), the fiber core (61) is made of PC transparent plastic doped with fluorescent agent, and the cladding (62) is coated outside the fiber core (61).
5. The fiber optic illumination device of claim 4, wherein the fiber core (61) has a diameter of 20 mm; the thickness of the cladding is 1-1.5mm, and the refractive index of the cladding (62) is smaller than that of the fiber core (61).
6. A fiber optic lighting device according to claim 1 wherein the laser diode (4) is a laser diode emitting blue light at 450nm, the phosphor in the fluorescent fiber (6) is a yellow phosphor capable of being stimulated to produce yellow light at 540 nm; alternatively, the first and second electrodes may be,
the laser diode (4) is a laser diode emitting 350nm purple light, and the fluorescent agent in the fluorescent optical fiber (6) is a fluorescent brightener capable of being excited to generate 450nm blue light; alternatively, the first and second electrodes may be,
the laser diode (4) is a laser diode emitting ultraviolet light of 254nm, and the fluorescent agent in the fluorescent optical fiber (6) is Y capable of being excited to generate red light of 611nm(2)O3：Eu3+A fluorescent agent; alternatively, the first and second electrodes may be,
the laser diode (4) is a laser diode emitting 254nm purple light, and the fluorescent agent in the fluorescent optical fiber (6) is (La, Ce, Te) PO capable of generating 543nm green light by stimulated emission4A fluorescent agent.
7. The fiber optic illumination device of claim 1, wherein the cooling system (2) is an air cooling system.
CN202010053044.6A 2020-01-17 2020-01-17 Optical fiber lighting device Pending CN111219652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010053044.6A CN111219652A (en) 2020-01-17 2020-01-17 Optical fiber lighting device

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Application Number Priority Date Filing Date Title
CN202010053044.6A CN111219652A (en) 2020-01-17 2020-01-17 Optical fiber lighting device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU207000U1 (en) * 2021-06-09 2021-10-06 Общество с ограниченной ответственностью "Ликон" (ООО "Ликон") LIGHTING DEVICE
CN115325510A (en) * 2022-08-10 2022-11-11 东莞康视达自动化科技有限公司 Light source system and light source replacing method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201090942Y (en) * 2007-08-22 2008-07-23 钟德铧 Long afterglow optical fiber lighting lamp
CN202275182U (en) * 2011-10-10 2012-06-13 广东华燚光电科技有限公司 Fluorescence fiber and white-light illuminating lamp manufactured by fluorescence fiber
CN103032685A (en) * 2012-12-27 2013-04-10 张旭东 Optical fiber light guide long-afterglow luminous lighting system
CN103343394A (en) * 2013-07-30 2013-10-09 青岛大学 Preparation method of polypyrrole nano fibers
CN105020648A (en) * 2015-06-24 2015-11-04 江苏大学 Optical fiber transmission lighting device
CN109061794A (en) * 2018-09-10 2018-12-21 华南理工大学 A kind of fluorescence nano composition polymer optical fiber and preparation method thereof
CN110687628A (en) * 2019-10-22 2020-01-14 南京春辉科技实业有限公司 Plastic fluorescent optical fiber and manufacturing method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201090942Y (en) * 2007-08-22 2008-07-23 钟德铧 Long afterglow optical fiber lighting lamp
CN202275182U (en) * 2011-10-10 2012-06-13 广东华燚光电科技有限公司 Fluorescence fiber and white-light illuminating lamp manufactured by fluorescence fiber
CN103032685A (en) * 2012-12-27 2013-04-10 张旭东 Optical fiber light guide long-afterglow luminous lighting system
CN103343394A (en) * 2013-07-30 2013-10-09 青岛大学 Preparation method of polypyrrole nano fibers
CN105020648A (en) * 2015-06-24 2015-11-04 江苏大学 Optical fiber transmission lighting device
CN109061794A (en) * 2018-09-10 2018-12-21 华南理工大学 A kind of fluorescence nano composition polymer optical fiber and preparation method thereof
CN110687628A (en) * 2019-10-22 2020-01-14 南京春辉科技实业有限公司 Plastic fluorescent optical fiber and manufacturing method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU207000U1 (en) * 2021-06-09 2021-10-06 Общество с ограниченной ответственностью "Ликон" (ООО "Ликон") LIGHTING DEVICE
CN115325510A (en) * 2022-08-10 2022-11-11 东莞康视达自动化科技有限公司 Light source system and light source replacing method
CN115325510B (en) * 2022-08-10 2023-10-03 东莞康视达自动化科技有限公司 Light source system and light source replacement method

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