CN1250989C - Side-illumination type optical fiber - Google Patents
Side-illumination type optical fiber Download PDFInfo
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- CN1250989C CN1250989C CNB018211712A CN01821171A CN1250989C CN 1250989 C CN1250989 C CN 1250989C CN B018211712 A CNB018211712 A CN B018211712A CN 01821171 A CN01821171 A CN 01821171A CN 1250989 C CN1250989 C CN 1250989C
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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
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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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
- G02B6/03622—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/06—Rod-shaped
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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
- G02B6/0005—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 of the fibre type
- G02B6/001—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 of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre
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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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02033—Core or cladding made from organic material, e.g. polymeric material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
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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
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
A side light type optical fiber, includes a core and a cladding disposed around the core, the cladding including a transparent first layer contacting the core, and a light diffusive second layer formed around the first layer, the layers being integrally molded.
Description
Technical field
The present invention relates to side-illumination type optical fiber.Particularly, side-illumination type optical fiber involved in the present invention can be launched the light of being introduced from least one end of fibre core with length direction by the covering around fibre core.
Background technology
As what be familiar with in this field, the discharge tube that is similar to fluorescent tube is launched the visible light with specified wavelength, and can be used for illumination purposes.When discharge tube was fluorescent light, then this fluorescent tube was usually used in adopting the advertisement or the decoration of fluorescence sign format.When adopting discharge of electricity, discharge tube emission bright dipping.It also produces heat with light.When using discharge tube, just should consider the leakage of heat and electricity.Therefore, discharge tube can not be used for the illumination or the demonstration of water.
In order to realize illumination or the demonstration in the water, proposed recently in illuminating device, set lighting source to be separated mutually with the place that needs illumination or show.Illuminating device comprises light source and optical fiber, and wherein, light source is arranged with the place branch that needs illumination or show, and optical fiber is used to throw light on and show and be arranged near illumination and the place that shows and its.Optical fiber generally all is included in the fibre core of core, and the light transmission that optical fiber one end can be introduced in this fibre core is to the other end of optical fiber, and be arranged on fibre core around and have than fibre core low-refraction covering more.
In optical fiber, side-illumination type optical fiber is known, and it can be from the lateral parts emission bright dipping of optical fiber.Can explain side-illumination type optical fiber with reference to figure 4.Optical fiber 20 is flexible and comprises the fibre core of being made by acrylic acid resin or similar material 21, and the covering of being made by teflon 22, and wherein, teflon can be the Teflon that is produced by E.I.Dupont de Nemours company
TM, or other similar products, as at United States Patent (USP) 4,422, disclosed in 719.Covering 22 is comprising the light granule proliferation equably, for example, metal oxide particle (for example titanium dioxide granule), its content is the 2-10% of weight.In addition, Japanese patent laid-open publication gazette Hei-10 (1998)-148725 has disclosed and has adopted with one heart that extruding contains 50 to 4, the optical fiber that 000ppm at least a light diffusion with crosslinked resin admixture interpolation material obtains as the fusion fluoropolymer of fibre core.WO98/08024 has also disclosed and has adopted the translucent clad material fusion mould that contains adularescent or another kind of color pigments to annotate the optical fiber of making on the surface of fibre core.Introduce light from the one or both ends of optical fiber and when transmitting, above-mentioned mentioned optical fiber can be launched light by covering optical fiber.
It also is known that the layer of covering comprises another layer light diffusion layer.For example, Jap.P. 2000-131539 has disclosed layer with covering and has been divided into two-layerly, and wherein one deck is to comprise the light granule proliferation constituting light diffusion layer, and another layer is a hyaline layer, and it does not comprise the light granule proliferation, is formed on the light diffusion layer.This is two-layer to be to adopt the method for extruding with one heart to make together.In this technology, light diffusion layer be directly and fibre core contacted.
In the structure that is obtained in Jap.P. 2000-131530, particularly part can strengthen the lateral emitting of optical fiber effectively near light source, but light can increase and decay along with the distance of leaving light source.This is far away more because leave light source, and the decay of light is also just severe more.Therefore, when optical fiber used as optical illumination, the optical fiber disclosed in the Jap.P. 2000-131530 was difficult to be used to effectively have the 10m or the illuminating device of long optical fibers more.
Summary of the invention
In order to achieve the above object, the invention provides side-illumination type optical fiber (can be called for short it " optical fiber " sometimes), it is made up of fibre core and the covering that is arranged on around the fibre core, this covering comprises the transparent ground floor that contacts with fibre core, and being formed in the light diffusion second layer around the ground floor, this is two-layer to be mold pressing together.In the present invention, ground floor preferably has the thickness of 50 to 300 μ m.Fibre core preferably has 5 to 30mm diameter.Covering also preferably can have double-decker, and its adopts and to be applicable to that two kinds of materials of first and second layers make with the method for concentric extruding.
Description of drawings
Fig. 1 is the diagrammatic cross-section of side-illumination type optical fiber of the present invention.
Fig. 2 graphic presentation the test result of lateral emitting brightness of embodiment and comparative example.The figure illustrates brightness along with the variation of leaving light source distance.
Fig. 3 graphic presentation the test result of lateral emitting brightness of embodiment and comparative example.The figure illustrates brightness along with the variation of leaving light source 2mm test angles far away.
Fig. 4 is the diagrammatic cross-section of the side-illumination type optical fiber of prior art.
Embodiment
Also can send brighter light for the homogeneity that can increase the brightness of optical fiber longitudinal direction, adopt light diffusion semi-transparent resin layer to be coated on the side-illumination type optical fiber that the method that has on the optical fiber that has covered transparent individual layer on the fibre core also can obtain 10m or more long length.This is can from one end to the other side transmit light in a longitudinal direction because comprise fibre core and the optical fiber that is coated in the transparent individual layer covering on the fibre core, and can be from surface (that is the side surface) leak light of covering.This is because only the transmitting by inner full-reflection is effective on the interface at the covering with relatively low reflection coefficient with between having relatively than the fibre core of high reflectance in the fibre that be incorporated into.
On the other hand, (for example, greater than 3mm under) the situation, the light in the fibre can go out from the side surface small leakage, understands on vertical dimension that some is luminous, even covering does not comprise the light granule proliferation to have relatively large diameter at fibre core.The diameter of fibre core is big more, and it is just many more that this phenomenon takes place, because can have the condition that more light can not satisfy the condition of inner full-reflection and arrive interface between fibre core and covering.In addition, on some part microcosmic, be uneven at the tack coat between covering and the fibre core, though it obviously has the extraordinary transparency.Have this uneven part and will become luminophor.
The light that is leaked generally has less relatively angle and more the component that sends from the covering side that comprised on the direction that is parallel to the covering side.Therefore, the optical fiber that has translucent smooth diffusing resin layer on covering has sufficient brightness uniformity in a longitudinal direction, but owing to the leakage of light makes light intensity relatively poor, so this optical fiber can not be used for long luminophor as fluorescent tube.
This just needs light diffusion layer can be bonded in cladding surface more closely, the escape that has the light that is parallel to the relatively large angle in covering side with the escape that reduces to have the light that is parallel to the relative smaller angle in covering side and increase.
For the light diffusion layer that can on the surface of covering, closely bond, understood some method.For example, adopt the method for resin-coating electric wire, it comprises the cooling curing resin molten mixture of transparent polymer and is dispersed in the white inorganic powder on fibre cladding surface.Another kind method comprises preparation light diffusion pitch tube and optical fiber is inserted in the light diffusion pitch tube.
Yet above-mentioned two kinds of mentioned methods all comprise and are used for light diffusion layer is coated on cladding surface, thus the additional step that causes production cost to increase.
In addition and since light diffusion layer be make respectively and be coated on covering lip-deep, this just is difficult to strengthen the bonding between covering and light diffusion layer.This will be often because the bending operation of optical fiber, variation of temperature or the like and the layer that is created between light diffusion layer and the covering separates.In case the separation of genetic horizon, the brightness of separating part will reduce and the difference in the generation brightness in whole optical fiber.So optical fiber just can not be worked as the luminescent device that is used to throw light on well.
The present inventor after deliberation many generations that separate about layer between optical fiber and light diffusion layer, and have been found that the generation that layer separates when optical fiber has bigger core diameter (particularly, 5mm or bigger core diameter) is just more obvious.The reason that this trend exists will be discussed hereinafter.
Under the situation of glass optical fiber, optical fiber is to twist in order to absorb flexural deformation, makes that glass optical fiber can be crooked and can not rupture.On the other hand, if glass particle has the diameter bigger than fibre, for example, and glass bar, it just at all can not be crooked, and if therefore rod is applied bigger bending force and will make its fracture.Having larger-diameter clavate particle can not resist crooked operation and can not absorb crooked distortion at all by twisting.Therefore, layer separates identically with glass bar between covering and light diffusion layer, and takes place through regular meeting when optical fiber has than major diameter.
The present invention explains with reference to each embodiment.In being attached to the accompanying drawing that should use, the element of identical numeral components identical or equivalence.In Fig. 1, optical fiber 10 has been represented one embodiment of the present of invention.Optical fiber 10 heart therein has fibre core 1 and around the covering 2 of fibre core 1.
Fibre core is generally made by polymkeric substance.The fibre core that polymkeric substance is made can by polymerization can polymerization material obtained.Fibre core can not have under the situation of loss to accept to enter into the light of fibre core from light source from the one or both ends exposed ends.This fibre core has very high light transmissibility and light is transferred to the other end from an end.
The light transmissibility that this fibre core has is not less than 80%.Term herein " light transmissibility " is meant to adopt to have the determined numerical value of spectrophotometer that wavelength is a 550nm light.Be applicable to that the reflection coefficient that the polymkeric substance of fibre core has is 1.4 to 1.7.
The solid fibre core that fibre core preferably adopts flexible polymkeric substance to make.Flexible polymkeric substance is acrylate copolymer preferably, vinyl acetate co-polymer, vinyl acetate-chloride copolymer or above-mentioned potpourri.The polymkeric substance of fibre core is preferably crosslinked, so that improve water tolerance.
The polymerizable material that is applicable to fibre core can be the acrylic monomers potpourri.The propylene ester monomer mixture that is applicable to fibre core comprises (1) and do not have the polymerisable acrylic monomers potpourri of hydroxyl in molecule, and (2) contain hydroxyl polymerizable acrylic monomer.Term as used herein " acrylic monomers " comprises the monomer with acrylic or has the monomer of methacrylic acid alkali or its both.Preferably methacrylate.Methacrylate can easily be controlled at fibre core Tg in the applicable scope, and can improve water tolerance, light transmissive or the like effectively.The polymeric material that is applicable to fibre core also can be by the made methacrylate oligomer of the reaction of at least two monomers, as long as technique effect of the present invention can variation.Except the monomer of simple function, also can use cross-linking monomer with two or more functional groups.
The example that does not have the acrylic monomers of hydroxyl is a methacrylate, for example, methyl methacrylate (methyl methacrylate), Jia Jibingxisuanyizhi (ethyl methacrylate), n-BMA (n-butyl methacrylate), methacrylic acid-2-ethyl pentyl ester (2-ethylhexylmethacrylate), isobutyl methacrylate (isobutyl methacrylate), metering system tert-butyl acrylate (t-butyl methacrylate), lauryl methacrylate (lauryl methacrylate), methacrylic acid dodecane ester (dodecyl methacrylate) and methacrylic acid stearoyl (stearylmethacrylate).Except methacrylate, also can use acrylates and comprise: methyl acrylate (methyl acrylate) with hydroxyl, ethyl acrylate (ethyl acrylate), n-butyl acrylate (n-butyl acrylate), acrylic acid-2-ethyl caproite (2-ethylhexylacrylate), acrylic acid isopentyl ester (isoamyl acrylate), propylene ester lauryl (laurylacrylate), stearyl acrylate acyl (stearyl acrylate), Isooctyl acrylate monomer (isooctylacrylate) or the like.Unsaturation acid, for example, acrylic acid (acrylic acid) or methacrylic acid (methacrylic acid) also can use as monomer.
The example that comprises the acrylic monomers of hydroxyl comprises: methacrylic acid-2-diethyl acetamidomalonate (2-hydroxyethyl methacylate), 2-hydroxyethyl acrylate (2-hydroxyethyl acrylate), 2-hydroxy propyl methacrylate (2-hydroxypropyl methacrylate), 2-hydroxypropyl acrylate (2-hydroxypropyl acrylate), 3-hydroxy propyl methacrylate (3-hydroxypropylmethacylate), 3 acrylic acid hydroxypropyl acrylate (3-hydroxypropyl acrylate), diglycol monotertiary methacrylate (diethyleneglycol monomethacrylate), diglycol monotertiary acrylate (diethylenegycol monoacrylate), triethylene glycol monomethacrylates (triethyleneglycol monomethacylate), triethylene glycol mono acrylic ester (triethyleneglycol monoacylate) or the like.
The example of the crosslinking chemical of crosslinked core polymkeric substance is a multifunctional monomer, comprise: diallyl phthalate (dially phtharate), two (methyl) propylene esters (triethyleneglycoldi (meth) acrylate) of triethylene glycol, diethylene glycol bis-allyl carbonate (diethyleneglycolbisallylcarbonate) or the like.
The preferred example that is applicable to acrylic monomers potpourri of the present invention comprises:
(a) 2-hydroxyethyl methylacrylate (2-hydroxyethyl methacrylate), methyl methacrylate (methyl methacylate), the potpourri of two (methyl) acrylic acid (triethyleneglycol di (meth) acrylate) of n-BMA (n-butyl methacrylate) and triethylene glycol;
(b) 2-hydroxyethyl methylacrylate (2-hydroxyethyl methacrylate), the potpourri of two (methyl) acrylic acid (triethyleneglycoldi (meth) acrylate) of n-BMA (n-butyl methacrylate) and triethylene glycol; And,
(c) 2-hydroxyethyl methylacrylate (2-hydroxyethyl methacrylate), n-BMA (n-butyl methacrylate), the potpourri of two (methyl) acrylic acid (triethyleneglycoldi (meth) acrylate) of methacrylic acid-2-Octyl Nitrite (2-ethylehexylmethacrylate) and triethylene glycol; Or the like.
Polymkeric substance at fibre core is to adopt under the crosslinked situation of crosslinking chemical, and the amount of crosslinking chemical is preferably according to 0.01 to 5.0% of polymerizable material general assembly (TW), preferably 0.1 to 4.5%.Fibre core also can comprise adjuvant, as long as fibre core can not make its degradation.The example of adjuvant is to be applicable to heat, the plasticizer of oxidation and ultraviolet light or the like, surfactant, colorant, stabilizing agent.
Can change be applicable to fibre core any composition in the polymeric material, to satisfy the needs of characteristic, for example, flexibility, corrosion resistance, coloring resistance, water tolerance.The length of fibre core is generally 50m to 100m, but is not limited thereto.In order to present technical advantage of the present invention, the preferably 10m of this fibre core or be longer than 10m, preferably 15m or longer.Fibre core generally has circle or plurality of stepped serrations in diametric(al), but is not limited thereto.
The diameter that fibre core is general is 3mm to 30mm.Generally be difficult to the application that is suitable for throwing light on less than the diameter of diameter limit, because concerning the beholder who sees illumination, the zone of illumination is too thin too little.On the other hand, the diameter greater than upper limit diameter will have tangible brightness decay in a longitudinal direction and can not improve the homogeneity of brightness.In addition, bigger diameter has reduced the flexible of optical fiber, therefore just is difficult to make the lighting device of the optical fiber that contains required form.Therefore, in order preferably to demonstrate photocurrent versus light intensity, the diameter of fibre core is 6 to 27mm, more compatibly is 7 to 20mm.
As explained above, the ground floor 3 of covering 2 and the second layer 4 are that integrated together mold pressing is made.Preferably, covering 2 can adopt the method for concentric extruding to make, in the method, as the two-layer or more multi-layered melt extruded together of covering with cambium layer, and cooling curing subsequently.This method has increased the bonding between layer effectively, but does not increase the step number that forms covering.Except coating had multilayer, covering of the present invention can adopt the method for the conventional covering that is same as individual layer to produce.
Make the not restriction of material of each covering, but generally can comprise polymkeric substance, for example, tetrafluoraoethylene-hexafluoropropylene copolymer (tetrafluoroetylene-hexafluoropropylenecopolymer (FEP)), hexafluoropropylene (HFP)/tetrafluoroethylene (TFE)-vinylidene fluoride copolymer (tetrafluoroetylene-hexafluoropropylene-vinylidene fluoridecopolymer), trifluoro-ethylene-vinylidene fluoride is got thing (trifluroethyle-vinylidenefluoride copolymer) altogether, polymethylpentene (polymethylpentene), vinyl acetate co-polymer (ethylene-vinyl acetate copolymer), vinyl acetate-chloride copolymer (vinylacetate-vinyl chloride copolymer) or the like.Ground floor that it should be noted that the contact fibre core has the reflection coefficient lower than fibre core.
Covering can comprise some adjuvants, as long as adjuvant does not make characteristic variation of the present invention.The example of adjuvant is a plasticizer, surfactant, and hardening agent, filling agent (for example, white pigment), colorant (for example, dyestuff), stabilizing agent, or the like.
The second layer has the light diffusing energy, and it generally can be studded with the material of light granule proliferation by fluoropolymer and in fluoropolymer and make.The quantity of light granule proliferation generally is in 0.01 to 50% the scope of second layer general assembly (TW), preferably in 0.1 to 45% scope, preferably in 1 to 40% scope.The luminophor of corresponding similar fluorescence symbol can not have enough brightness (for example, 100cd/m less than the quantity of lower limit
2Or the higher illumination that is used for white).Just can not on whole longitudinal direction, launch light in the ratio greater than 50% on the weight with enough brightness.
The light granule proliferation generally is beaded glass or the pearl that obtains from other material, and inorganic particle, for example, and titania, silicon dioxide.The object lesson of particle is that to have reflection coefficient be 1.5 to 3.0 white inorganic particles.The preferred example of white inorganic particles is barium sulphate (reflection coefficient=1.5), magnesium oxide (reflection coefficient=1.8), and titanium dioxide (titania; Reflection coefficient=2.6).
The light granule proliferation also can be the particle of other type, as long as it can not make technical effect variation of the present invention.Except the light granule proliferation, colorant (for example, the dyestuff of fluorescence) also can be included in the layer of covering, is used for changing the white light that enters into fibre core, to reach band coloured light and to launch it.
The transparency of the ground floor that is coated can be used as light transmission and shows, and preferably greater than 60%, preferably can be more preferably greater than 90% greater than 70%.If the ground floor that is coated only has very low light transmissive, will reduce the illumination of optical fiber.
That the thickness of the ground floor that is coated is preferable is 50 to 300 μ m, and preferably 70 to 280 μ m are more preferably 100 to 250 μ m.The ground floor thickness that is coated is too little, and the decay of brightness clearly, and can not improve brightness uniformity on the longitudinal direction on whole longitudinal direction.Diameter at fibre core is to be equal to or greater than under the situation of 5mm, and preferably the ground floor that is coated is thick as much as possible, to improve the homogeneity of brightness.If the ground floor that is coated is too thick, will be reduced in the brightness of introducing the some part away from light, and the homogeneity of brightness can not be guaranteed well.No matter under any situation, optical fiber just is not suitable for the illuminating device as illumination.
The thickness of the second layer that is coated does not have special restriction, can not make in the opaque scope of covering but can be chosen in.Preferably, the thickness of the second layer is greater than 10 μ m, and the gross thickness of whole covering is not more than 2mm.
Optical fiber of the present invention is to have the tubular covering of Len req and polymerizable material is filled in the tubular covering by preparation, makes the material polymerization to form polymerisable fibre core and to be coated on that the method for the covering on the fibre core makes subsequently.Hereinafter will explain the process of making in detail.
At first, preparation covering (for example, the pipe of coating).This covering generally be adopt the method for extruding with one heart to form to have desired thickness, the cladding of diameter and length prepares.The above-mentioned covering of making can be wrapped on the feeding roller.Be wrapped on the feeding roller covering again around to the strand tight cylinder on.Can adopt the combination of feeding roller and the tight cylinder of strand, and with the continuous coating on the longitudinal direction put from feeding roller to twisting tight cylinder, between is provided with heating region (container that contains heating medium, for example, the water receptacle of heating) and drives covering by this heating region.
Heating region, that is, heating container can have two openings, drives covering by this opening.These two openings are respectively at the covering feed opening on feeding roller one side with at the tight cylinder of strand covering outlet opening on one side.Heating container can have only an opening facing to the side of vertical direction.Covering enters into the inside of container by this opening, and its direction changes near the bottom of container, and this covering comes out by identical opening subsequently.As explained above, covering is immersed in the medium of heating, to finish the polymerization of fibre core, obtain optical fiber in the opening outside subsequently.
The polymerizable material that is applicable to fibre core generally is to be filled in the cladding under the pressure that uses.Adopt such method, can material be filled into the covering from the other end, the end with covering seals subsequently.The method that can adopt metal cap or metal valve to seal an end of covering is carried out the sealing of covering.The filling that polymerizable material is filled in the cladding is to be connected with the case that is loading polymeric material by the end opening with covering, and the pressurization of case inside constantly is filled in the cladding material.
As mentioned above, the polymeric material in covering begins to heat and finish the reaction of polymerization in heating region, thereby obtains to have the optical fiber that tight bond the fibre core of covering.
The temperature of heating is 35 to 90 ℃, preferably 40 to 85 ℃.The time that covering is trapped in heating region does not have special restriction, but generally is 10 minutes to 5 hours, preferably 15 minutes to 3 hours.The preferable length of covering is 10m to 3,000m, preferably 20 to 2,000m.
The preferable elasticity of covering is 10 to 700MPa, and preferably 20 to 600MPa." elasticity " of covering is the numerical value under heating-up temperature.The preferable tube thickness of covering is 0.01 to 2mm, and preferably 0.05 to 1.5mm, is more preferably 0.2 to 1mm.If covering is too thin, then the water tolerance of optical fiber will reduce.If it is too thick, then reduced flexibility.The interior diameter of covering can be determined by the core diameter of final optical fiber.
Optical fiber of the present invention is applicable to the long-distance illumination of having equipped information character (for example, billboard, fluorescence symbol and road sign etc.) illuminating device.
The light that the optical fiber one or both ends can be introduced of the present invention is outwards launched by the circumferential surface of side surface or covering.Light source can be a high brightness lamp, for example, and xenon lamp, Halogen lamp LED, Embedded lamp.The general consumption of electric power of this lamp is 10 to 500W.
For example, optical fiber of the present invention can as shown in Figure 5, thereby form lighting device as long illuminating device.In Fig. 5, the optical fiber formed lateral emitting part 30 long by the present invention shown the figure with part curve.In the illustrated device of the present invention, the luminophor that contains this figure has constituted all or part of of advertisement or director information.
The light transmission part 32 that is connecting the light source 31 with ambient light part can not constitute the above-mentioned information of mentioning.Therefore, preferably adopt light shield lining (the soft vinyl chlorination of black resin) to be covered with light transmission part 32, making it can not be luminous.
Even optical fiber bending of the present invention can not produce layer yet and peel off.Therefore, this optical fiber can form the curve shape that has as shown in Figure 5 easily (for example, character and symbol) design, this has demonstrated the satisfactory performance that has as working flare.
Be used at optical fiber of the present invention under the situation of long working flare of lighting device, if by end the introduce light of a light source from optical fiber, that the length of this optical fiber is preferable is 10m to 50m, 15m to 40m preferably, if introduce light from two ends by two light sources, then length is 10 to 100m, is preferably 15 to 80m.
Example
(example 1)
Preparation has the ground floor made together and the covering of the second layer.
Adopt two extruders, and a pressed end of each extruder is connected with concentric extrusion die.Enter after the extruder, tetrafluoroethene-hexachloropropylene (tetrafluoroethylene-hexafluropropylene (FEP)) resin (by the FEP 100J of Mitsui DuChemical company product) is overmolding to ground floor.Enter after another extruder, weight ratio is that 100 parts FEP100J and the potpourri of a NP 20WH (by the product FEP of Daikin Industries company) are overmolding to the second layer.NP 20WH resin contains the titania of percentage by weight 2.3%.The ground floor of covering has 9.5% light transmissibility.
By using the above-mentioned extruder of mentioning, preparation is applicable to the covering of example.This covering has tubular shape and has opening at two ends.The ground floor of covering has the transparent resin layer that thickness is about 200 μ m, and the second layer with light diffusion layer has thickness and is about 450 μ m.The overall diameter of covering is about 15mm.
As the polymeric material that is applicable to fibre core, the preparation weight ratio is 4 parts of methacrylic acid hydroxyethyl esters (hydroxyethyl methacrylate), 80 parts of n-BMAs (n-butylmethacrylate), the monomer mixture of 16 parts of 2-ethylhexyl methacrylates (2-ethylhexyl methacrylate) and 1 part of triethylene glycol double methyl methacrylate (triethyleneglycol dimethacrylate), and peroxidating lauryl (lauroyl peroxide) (polymerization catalyst) joined in the potpourri.
Polymeric material is poured into the covering from an end, seals the other end subsequently.In heating region, the sealed end by driving covering and sending continuously, when leaving the other end along with contact nitrogen, polymeric material heating back polymerization.Polymeric material forms solid-state fibre core, to obtain side-illumination type optical fiber.
(example 2)
The method that adopts example 1 to be discussed, the preparation side-illumination type optical fiber is except the component of the NP 20WH that is incorporated into another extruder has become 20 parts from 1 part.It is 38.3% light granule proliferation (titania) that the fine covering second layer that obtains has percentage by weight.
(comparative example 1)
The method that adopts example 1 to be discussed, the preparation side-illumination type optical fiber is not except using NP 20WH and only using FEP 100J.
(comparative example 2)
The method that adopts example 1 to be discussed, the preparation side-illumination type optical fiber be 10: 1 FEP 100J and NP 20WH except the resin of extruder 1 changes over component proportion, and the resin of extruder 2 has only FEP 100J.In this embodiment, ground floor has the light diffusing energy, and the second layer is transparent.The second layer of covering has 95% light transmissibility.
(1) lateral emitting brightness determines
Definite method of lateral emitting brightness is as follows:
Metal halid lamp is (by the LBM 130H of Sumitomo 3M company product; Power consumption is 130W) at one end be connected with the fibre core of optical fiber.Open light source, and the brightness instrument that adopts Minolta company to produce, be determined at the brightness of leaving light source certain distance position as CS-100.This brightness instrument is positioned on the point apart from optical fiber side surface 60cm.It should be noted that the brightness instrument is accepted the normal in light zone and the angle of fibre core longitudinal direction is set to 90 °.
The structure of determining as shown in Figures 2 and 3.
Fig. 2 has shown the variation of brightness with the distance of leaving light source, and this is brightness uniformity evaluation in a longitudinal direction.Example 1 is compared with the optical fiber of comparative example 2 with 2 optical fiber, has higher homogeneity.In comparative example 2, the brightness of part is very high near light source, but the distance of measurement point and light source is far away more, and then brightness is just low more and precipitous relatively.On the other hand, when determining that from one of light source the optical fiber of some example 1 and 2 has very little decline.
In comparative example 1, to compare with 2 optical fiber with example 1, the brightness on whole optical fiber longitudinal direction is low-down.
See very clearly that from above-mentioned evaluation example 1 and 2 optical fiber are compared with comparative example 1 and 2, are more suitable for the illumination in long working flare.
Fig. 3 has shown and is leaving on the light source 2mm point brightness with the variation of measured angular.In Fig. 3, axis of ordinates represents that the brightness instrument accepts the angle of the longitudinal direction of the normal in light zone and fibre core.
In this case, be parallel to the side surface of covering and be 180 °, and be parallel to the side surface of covering and be zero degree facing to the direction of the other end facing to the direction of an end that is connecting light source, that is, and 0 °.
Compare with the optical fiber of the comparative example 1 that does not have covering, the optical fiber of example 1 has improved near the brightness of light component perpendicular to the covering side regions.Therefore, can make light with less angular spread, to improve effectively perpendicular near the light component the covering side regions at the existing light diffusion layer of outermost surface.
(crooked evaluation)
The optical fiber of example is cut into 1m, and with 8 times of radius-of-curvature of core diameter (the about 10mm of r=) with crooked 10 times of 90 ° angle of bend.Subsequently, to whether in covering genetic horizon peel off and assess.Example 1 and 2 optical fiber not can be peeled off between first and second layers, and also do not demonstrate before and after crooked test and any difference that is occurred on light source is connected.
Side-illumination type optical fiber of the present invention ambient light in a longitudinal direction can have uniform brightness, even this optical fiber is longer relatively.In addition, optical fiber of the present invention can avoid effectively and contacted first hyaline layer of fibre core and second light diffusion layer between the layer peel off, even it has the diameter of relatively large fibre core.
Claims (4)
1. side-illumination type optical fiber comprises fibre core and the covering around described fibre core,
Described covering comprises: with the contacted transparent ground floor of described fibre core, and be formed on the light diffusion second layer around the ground floor, described two-layer be mold pressing together.
2. according to the described side-illumination type optical fiber of claim 1, it is characterized in that the thickness of described ground floor is 50 to 300 μ m.
3. according to the described side-illumination type optical fiber of claim 1, it is characterized in that the diameter of described fibre core is 5 to 30mm.
4. according to the described side-illumination type optical fiber of claim 1, it is characterized in that described covering has the double-decker that employing is applicable to that the concentric pressing method of first and second layers of two kinds of material is made.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP389331/00 | 2000-12-21 | ||
| JP389331/2000 | 2000-12-21 | ||
| JP2000389331A JP2002202415A (en) | 2000-12-21 | 2000-12-21 | Side face light emitting optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1483152A CN1483152A (en) | 2004-03-17 |
| CN1250989C true CN1250989C (en) | 2006-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB018211712A Expired - Fee Related CN1250989C (en) | 2000-12-21 | 2001-11-21 | Side-illumination type optical fiber |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1350127A1 (en) |
| JP (1) | JP2002202415A (en) |
| KR (1) | KR20030068188A (en) |
| CN (1) | CN1250989C (en) |
| BR (1) | BR0116284A (en) |
| CA (1) | CA2430494A1 (en) |
| MX (1) | MXPA03005401A (en) |
| TW (1) | TWI224216B (en) |
| WO (1) | WO2002052314A1 (en) |
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| KR100502292B1 (en) * | 2001-02-12 | 2005-07-22 | 에스케이씨 주식회사 | Side-face light emitting plastic optical fiber and the preparation thereof |
| DE10244706A1 (en) | 2002-09-24 | 2004-03-25 | Röhm GmbH & Co. KG | A shaped body from a plastics matrix of transparent plastics containing a soluble fluorescent dye and a scattering agent useful for automobile bodies, designer furniture, road signs or for illuminated advertising signs |
| US7194184B2 (en) * | 2003-03-10 | 2007-03-20 | Fiberstars Incorporated | Light pipe with side-light extraction |
| JP2004347997A (en) * | 2003-05-23 | 2004-12-09 | Kurabe Ind Co Ltd | Optical transmission body, illuminator using it, and method for manufacturing it |
| WO2006070824A1 (en) * | 2004-12-27 | 2006-07-06 | Mitsubishi Rayon Co., Ltd. | Polymer composition, plastic optical fiber, plastic optical fiber cable and method for producing plastic optical fiber |
| JP2008216318A (en) * | 2007-02-28 | 2008-09-18 | Hitachi Cable Ltd | Heat-resistant synthetic resin optical fiber, and its manufacturing method |
| CN101592821B (en) * | 2008-05-29 | 2011-06-29 | 北京中视中科光电技术有限公司 | Backlight source |
| CN102150044B (en) * | 2008-07-25 | 2014-10-22 | 康宁股份有限公司 | Nanostructured optical fiber illumination systems and methods for biological applications |
| KR20110057169A (en) * | 2008-09-05 | 2011-05-31 | 스미토모 베이클리트 컴퍼니 리미티드 | Optical waveguide, optical interconnection, opto-electric hybrid board, and electronic device |
| JP2010218980A (en) * | 2009-03-18 | 2010-09-30 | Sony Corp | Fiber lamp, backlight, and liquid crystal display device |
| JP5885196B2 (en) * | 2011-08-18 | 2016-03-15 | フクビ化学工業株式会社 | Manufacturing method of optical fiber type linear light emitter, and optical fiber type linear light emitter |
| JP2015510603A (en) * | 2011-12-19 | 2015-04-09 | コーニング インコーポレイテッド | Uniform white light diffusing fiber |
| CN103364864A (en) * | 2012-03-26 | 2013-10-23 | 联想(北京)有限公司 | Light-guide device and display equipment |
| JP6320761B2 (en) * | 2014-01-14 | 2018-05-09 | 住友重機械工業株式会社 | Neutron beam detection device and neutron capture therapy device |
| KR101653051B1 (en) * | 2014-10-16 | 2016-09-01 | 주식회사 경신전선 | Lateral emitting optical fiber |
| KR101649737B1 (en) * | 2014-11-24 | 2016-08-23 | 주식회사 경신전선 | Lateral emitting optical fiber |
| EP3239748B1 (en) * | 2014-12-25 | 2022-01-26 | Kuraray Co., Ltd. | Method for manufacturing optical fiber rod |
| US9851500B2 (en) * | 2015-02-06 | 2017-12-26 | Corning Incorporated | Light-diffusing optical elements having cladding with scattering centers |
| CN106033137B (en) * | 2015-03-09 | 2019-02-26 | 武汉邮电科学研究院 | A kind of silica clad high power transmission dispersion fiber and its manufacturing method |
| KR102150292B1 (en) * | 2015-09-02 | 2020-09-01 | 후구비카가구코오교우가부시끼가이샤 | Soft linear illuminant, and manufacturing method thereof |
| EP3380783B1 (en) * | 2015-11-25 | 2023-11-08 | Corning Incorporated | Light-diffusing optical fibers |
| CN107505679B (en) * | 2017-08-10 | 2019-10-01 | 苏州达方电子有限公司 | Power supply line assembly and the electronic device for applying it |
| WO2019083920A1 (en) * | 2017-10-24 | 2019-05-02 | Corning Incorporated | Light diffusing optical fibers for guiding and scattering ultraviolet light |
| KR20200026516A (en) * | 2018-09-03 | 2020-03-11 | 현대자동차주식회사 | Optical fiber with reducing light bias for lighting and manufacturing method of the same |
| CN109613645B (en) * | 2018-12-18 | 2021-05-04 | 东莞市彩炫光电科技有限公司 | Extrusion type flexible optical fiber and preparation method thereof |
| CN111118658A (en) * | 2019-12-06 | 2020-05-08 | 湖北森沃光电科技有限公司 | Extrusion type super-flexible side light-emitting optical fiber and preparation method thereof |
| JP7395545B2 (en) * | 2021-09-07 | 2023-12-11 | 三菱電線工業株式会社 | Optical device using light diffusing fiber |
| GB2622828A (en) * | 2022-09-29 | 2024-04-03 | Fotolec Tech Limited | A Diffusion Coating for a Lighting Unit |
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| JPH05341125A (en) * | 1992-06-10 | 1993-12-24 | Asahi Chem Ind Co Ltd | Side surface light emitting cable and structure thereof |
| CA2219855C (en) * | 1996-11-12 | 2007-01-23 | Rohm And Haas Company | Flexible light pipe for side-lit applications |
| JPH11281819A (en) * | 1998-03-02 | 1999-10-15 | Minnesota Mining & Mfg Co <3M> | Optical fiber and light emitting device |
-
2000
- 2000-12-21 JP JP2000389331A patent/JP2002202415A/en active Pending
-
2001
- 2001-11-21 MX MXPA03005401A patent/MXPA03005401A/en unknown
- 2001-11-21 EP EP01995858A patent/EP1350127A1/en not_active Withdrawn
- 2001-11-21 CN CNB018211712A patent/CN1250989C/en not_active Expired - Fee Related
- 2001-11-21 CA CA002430494A patent/CA2430494A1/en not_active Abandoned
- 2001-11-21 BR BR0116284-5A patent/BR0116284A/en not_active IP Right Cessation
- 2001-11-21 KR KR10-2003-7008352A patent/KR20030068188A/en not_active Application Discontinuation
- 2001-11-21 WO PCT/US2001/043405 patent/WO2002052314A1/en not_active Application Discontinuation
- 2001-12-05 TW TW090130098A patent/TWI224216B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| MXPA03005401A (en) | 2004-05-05 |
| WO2002052314A1 (en) | 2002-07-04 |
| EP1350127A1 (en) | 2003-10-08 |
| KR20030068188A (en) | 2003-08-19 |
| JP2002202415A (en) | 2002-07-19 |
| CA2430494A1 (en) | 2002-07-04 |
| TWI224216B (en) | 2004-11-21 |
| CN1483152A (en) | 2004-03-17 |
| BR0116284A (en) | 2004-07-06 |
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