JP2000039517A - Light transmission tube and its production - Google Patents

Light transmission tube and its production

Info

Publication number
JP2000039517A
JP2000039517A JP10209751A JP20975198A JP2000039517A JP 2000039517 A JP2000039517 A JP 2000039517A JP 10209751 A JP10209751 A JP 10209751A JP 20975198 A JP20975198 A JP 20975198A JP 2000039517 A JP2000039517 A JP 2000039517A
Authority
JP
Japan
Prior art keywords
core
light
clad
transmission tube
tubular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP10209751A
Other languages
Japanese (ja)
Inventor
Minoru Ishiharada
石原田  稔
Hideo Sugiyama
秀夫 杉山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP10209751A priority Critical patent/JP2000039517A/en
Priority to GB9908637A priority patent/GB2336660B/en
Priority to US09/292,463 priority patent/US6278827B1/en
Priority to DE19917886A priority patent/DE19917886B4/en
Publication of JP2000039517A publication Critical patent/JP2000039517A/en
Priority to US09/761,584 priority patent/US20010016105A1/en
Withdrawn legal-status Critical Current

Links

Landscapes

  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Polyesters Or Polycarbonates (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive light transmission tube which emits light having high luminance while having directivity from its lateral peripheral surface, maintains an excellent light emitting characteristic in spite of adhesion of stains, etc., and has excellent mass productivity. SOLUTION: This light transmission tube 1 has a tubular clad 3 and a core 2 composed of a material having the refractive index higher than the refractive index of this clad material, is spirally formed with a plurality of belt-like reflection layers 4a, 4B between the tubular clad 3 and the core 2 along the longitudinal direction thereof and is constituted to reflect and scatter the light passing the core 2 by these reflection layers 4A, 4B and to release the light to plural directions from the outer peripheral surface of the tubular clad 3 on the side opposite to the side formed with the reflection layers. The light transmission tube is produced by using a multicolor extruder, simultaneously introducing the core material, the clad material and the reflection materials contg. white pigments or scattering materials into the respective mouthpiece parts of the extruder and respectively simultaneously extruding the core material to a columnar shape, the reflection materials to plural belt forms on the outer peripheral surface of the columnar core material and the clad material to a tubular form covering the core material and the reflection materials.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、管状クラッドと、
この管状クラッドの構成材料よりも高屈折率の材料より
なるコアとを備えた光伝送チューブにおいて、管状クラ
ッドとコアとの間に帯状の反射層を形成することによ
り、管状クラッドの側周面(外表面部)から指向性を有
する光を放出させるようにした光伝送チューブ及びその
製造方法に関する。
TECHNICAL FIELD The present invention relates to a tubular cladding,
In a light transmission tube provided with a core made of a material having a higher refractive index than the constituent material of the tubular clad, by forming a strip-shaped reflective layer between the tubular clad and the core, the side peripheral surface of the tubular clad ( The present invention relates to an optical transmission tube configured to emit light having directivity from an outer surface portion) and a method of manufacturing the same.

【0002】[0002]

【従来の技術】従来、数m程度の長さに亘り発光が得ら
れる発光体としては、ネオン管や蛍光管がある。しか
し、ネオン管や蛍光管は高電圧を必要とし、感電や漏電
等の危険があるため例えば水中や雨、雪のかかる箇所で
は使用できず、更にガラス管で形成されているため、耐
衝撃性に難があり、人や車などの物体が接触するような
場所では使用できなかった。
2. Description of the Related Art Conventionally, a neon tube or a fluorescent tube has been used as a light emitter capable of emitting light over a length of about several meters. However, neon tubes and fluorescent tubes require high voltage and cannot be used under water, rain or snow, for example, because of the danger of electric shock or electric leakage. And cannot be used in places where objects such as people and cars come into contact.

【0003】そこで、これらの問題を解決するものとし
て、可撓性チューブに透明コア液又は柔軟な透明ポリマ
ーを充填した光伝送チューブや、プラスチック光ファイ
バーを撚り合わせたものが提案されている。これらは光
源から出てくる光をチューブの一端から入射させ、数十
mの長さに亘りチューブ側面から光を出射させるもの
で、光源と発光部分を分離でき、破損の危険性もないこ
とから、水中や屋外、爆発の恐れのある環境等において
も使用することができ、また、ガラス細工などの複雑な
加工が不要で製造が容易である上に、施工性も良好なも
のであった。
In order to solve these problems, an optical transmission tube in which a flexible tube is filled with a transparent core liquid or a flexible transparent polymer, or a device in which a plastic optical fiber is twisted have been proposed. In these, the light coming from the light source is made incident from one end of the tube and emitted from the side of the tube over a length of several tens of meters, so that the light source and the light emitting part can be separated and there is no risk of breakage. It can be used in water, outdoors, in an environment where there is a danger of explosion, and the like. In addition, complicated processing such as glasswork is not required, the production is easy, and the workability is good.

【0004】しかしながら、管状クラッドと、この管状
クラッドの構成材料より高屈折率の材料よりなる透明コ
アとからなる光伝送チューブは、一般により多くの光を
光伝送チューブ先端に送ることを目的とするため、チュ
ーブの側周面の輝度は高くない。
However, an optical transmission tube composed of a tubular clad and a transparent core made of a material having a higher refractive index than the constituent material of the tubular clad generally aims to send more light to the tip of the optical transmission tube. Therefore, the brightness of the side peripheral surface of the tube is not high.

【0005】チューブ側周面の輝度を高めるために、管
状クラッド内面に凹凸を付けたりコアに光散乱性を有す
る粒子を分散させることが考えられるが、この方法で
は、チューブ側周面から断面方向の全方位に光が放射し
てしまうため、所望の方向において十分に高い輝度を得
ることはできなかった。
[0005] In order to enhance the brightness of the tube side peripheral surface, it is conceivable to make the inner surface of the tubular cladding uneven and to disperse particles having light scattering properties in the core. Since light is emitted in all directions, it was not possible to obtain a sufficiently high luminance in a desired direction.

【0006】そこで、ガラスや透明樹脂製の透明ロッド
の側周面に、光反射性塗料を点状又は線状に印刷して反
射層を形成し、特定方向に光を放射させる光散乱ロッド
が提案されている。この光散乱ロッドによれば、放射さ
せる光に指向性を持たせた分だけ輝度を高めることがで
きるが、ロッドの外周部に汚れが付着した場合には、該
透明ロッドの光伝送性が低下するため、輝度が低下した
り長さ方向の輝度分布が変化したりするなどの問題があ
り、ロッドが汚れないような環境でしか利用できなかっ
た。また、このような光散乱ロッドは、押し出しや注型
重合などの方法で透明ロッドを作製した後、この透明ロ
ッドの外周に光反射性塗料を印刷する方法で製造される
が、印刷塗膜の乾燥工程に時間がかかり、また少なくと
もロッドの成形と印刷との2つの工程を経なければなら
ないため、生産性が悪く、高価となるという欠点もあっ
た。また、ロッド状のものに印刷するため、側周面の一
側にしか反射層を形成することができず、このため、光
の放射方向に制約を受けるという不具合もあった。
Therefore, a light-scattering rod that emits light in a specific direction by forming a reflective layer by printing a light-reflective paint in a dot or line shape on the side peripheral surface of a transparent rod made of glass or transparent resin is known. Proposed. According to this light scattering rod, the brightness can be increased by the directivity of the emitted light, but if dirt adheres to the outer periphery of the rod, the light transmission of the transparent rod is reduced. For this reason, there is a problem that the luminance is reduced or the luminance distribution in the length direction is changed, and it can be used only in an environment where the rod is not soiled. Further, such a light scattering rod is manufactured by a method in which a transparent rod is produced by a method such as extrusion or cast polymerization, and then a light reflective paint is printed on the outer periphery of the transparent rod. The drying step is time-consuming, and at least requires two steps of forming and printing the rod, resulting in poor productivity and high cost. In addition, since printing is performed on a rod-shaped object, the reflection layer can be formed only on one side of the side peripheral surface, and therefore, there is a problem that the radiation direction of light is restricted.

【0007】[0007]

【発明が解決しようとする課題】上述の如く、従来にお
いては、側周面から特定の指向性を持って光を放出させ
ることにより輝度を高めた光伝送チューブであって、汚
れ等による発光特性の低下の問題がなく、量産性に優
れ、かつ安価な光伝送チューブは提供されていないのが
現状である。
As described above, in the prior art, a light transmission tube in which brightness is increased by emitting light with a specific directivity from a side peripheral surface, and has a light emission characteristic due to dirt or the like. At present, an optical transmission tube excellent in mass productivity and inexpensive has not been provided.

【0008】本発明は上記従来の問題点を解決し、側周
面(外表面部)から指向性を持って高輝度に発光し、汚
れなどが付着しても優れた発光特性を維持し、かつ量産
性に優れた安価な光伝送チューブ及びその製造方法を提
供することを目的とする。
The present invention solves the above-mentioned conventional problems, emits light with high directivity from the side peripheral surface (outer surface portion), and maintains excellent light emission characteristics even when dirt or the like adheres. An object of the present invention is to provide an inexpensive optical transmission tube excellent in mass productivity and a method for manufacturing the same.

【0009】[0009]

【課題を解決するための手段】本発明の光伝送チューブ
は、管状クラッドと、該管状クラッドの構成材料よりも
高屈折率の材料で構成されるコアとを備える光伝送チュ
ーブにおいて、該管状クラッドとコアとの間に該管状ク
ラッドの長さ方向に沿って帯状の反射層を形成し、前記
コアを通る光を該反射層で反射・散乱させて該反射層形
成側と反対側の管状クラッド側周面から放出させるよう
にした光伝送チューブであって、該帯状の反射層を複数
条形成し、前記コアを通る光を管状クラッド側周面から
複数の方向に放出させるようにしたことを特徴とする。
According to the present invention, there is provided an optical transmission tube comprising: a tubular clad; and a core made of a material having a higher refractive index than the constituent material of the tubular clad. Forming a strip-like reflective layer along the length direction of the tubular clad between the core and the core, and reflecting and scattering light passing through the core with the reflective layer to form a tubular clad opposite to the reflective layer forming side. An optical transmission tube configured to emit light from a side peripheral surface, wherein a plurality of the strip-shaped reflective layers are formed, and light passing through the core is emitted in a plurality of directions from the tubular clad side peripheral surface. Features.

【0010】本発明の光伝送チューブでは、反射層を管
状クラッドとコアとの間にチューブの長さ方向に沿って
帯状に形成してあり、光量の最も多いコア内部を通る強
い光がこの帯状の反射層で反射され、該反射層と反対側
のチューブ側周面から指向性の高い強い光として放出さ
れる。この結果、著しく輝度が高くなり、非常に明るい
ものとなる。なお、反射層を複数条設けているので、2
以上の複数の方向に指向性を持つ光条が放出するように
なる。
In the light transmission tube of the present invention, the reflection layer is formed in a band shape between the tubular cladding and the core along the length direction of the tube, and strong light passing through the core having the largest light intensity is formed in the band shape. And is emitted as strong light with high directivity from the tube side peripheral surface opposite to the reflective layer. As a result, the brightness becomes extremely high and the brightness becomes very bright. Since a plurality of reflective layers are provided,
The striations having directivity in a plurality of directions are emitted.

【0011】本発明においては、管状クラッドは(メ
タ)アクリル系ポリマーよりなり、コアはポリスチレ
ン、ポリカーボネート又はスチレン−(メタ)アクリル
共重合体よりなり、反射層は白色顔料又は散乱材を含む
(メタ)アクリル系ポリマーよりなることが好ましい。
In the present invention, the tubular clad is made of a (meth) acrylic polymer, the core is made of polystyrene, polycarbonate or a styrene- (meth) acrylic copolymer, and the reflective layer contains a white pigment or a scattering material. ) It is preferable that it is made of an acrylic polymer.

【0012】このような本発明の光伝送チューブは、3
個のスクリュー部を有する3色押出機等の多色押出機を
用い、コア材、クラッド材、及び白色顔料又は散乱材を
含む反射材を該多色押出機の例えば各口金部に導入し、
コア材を円柱状に、反射材をこの円柱状コア材外周面上
に複数条の帯状に、かつクラッド材を上記コア材及び反
射材を覆うチューブ状にそれぞれ同時に押し出して、管
状クラッドとコアとの間にその長さ方向に沿って複数条
の帯状の反射層を形成する本発明の光伝送チューブの製
造方法により、高い生産性のもとに安価に製造すること
ができる。
The light transmission tube of the present invention has three
Using a multicolor extruder such as a three-color extruder having three screw parts, a core material, a clad material, and a reflective material containing a white pigment or a scattering material are introduced into, for example, each die portion of the multicolor extruder,
The core material is cylindrical, the reflective material is extruded into a plurality of strips on the outer peripheral surface of the cylindrical core material, and the clad material is simultaneously extruded into a tube shape covering the core material and the reflective material. According to the method for manufacturing an optical transmission tube of the present invention in which a plurality of strip-shaped reflective layers are formed along the length direction between the layers, the optical transmission tube can be manufactured at low cost with high productivity.

【0013】[0013]

【発明の実施の形態】以下に図面を参照して本発明の実
施の形態を詳細に説明する。
Embodiments of the present invention will be described below in detail with reference to the drawings.

【0014】図1は本発明の光伝送チューブの実施の形
態を示す斜視図、図2は図1のII−II線に沿う断面図、
図3は図2のIII−III線に沿う断面図、図4は反射層の
形成例を示す断面図である。
FIG. 1 is a perspective view showing an embodiment of an optical transmission tube of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG.
FIG. 3 is a cross-sectional view along the line III-III in FIG. 2, and FIG. 4 is a cross-sectional view showing an example of forming a reflective layer.

【0015】図1〜3に示す光伝送チューブ1は、コア
2とこれを覆う管状クラッド3との間に、チューブの長
手方向に延在する帯状の反射層4A,4Bを2条に形成
したものである。なお、反射層4A,4Bはコア3の表
面から若干コア3の内部に侵入した状態で形成されてい
ても良い。
The optical transmission tube 1 shown in FIGS. 1 to 3 has two strip-like reflecting layers 4A and 4B extending in the longitudinal direction of the tube between a core 2 and a tubular cladding 3 covering the core. Things. Note that the reflection layers 4A and 4B may be formed in a state in which the reflection layers 4A and 4B slightly enter the inside of the core 3 from the surface of the core 3.

【0016】コア2を構成する材料(コア材)には、管
状クラッド3を構成する材料(クラッド材)よりも屈折
率が高い透明材料が用いられ、一般的には、プラスチッ
ク、エラストマー等の中から目的に応じて適宜選択使用
される。
As the material (core material) forming the core 2, a transparent material having a higher refractive index than the material (cladding material) forming the tubular cladding 3 is used. Is appropriately selected and used depending on the purpose.

【0017】コア材の具体例としては、ポリスチレン、
スチレン・メチルメタクリレート共重合体、(メタ)ア
クリル樹脂、ポリメチルペンテン、アリルグリコールカ
ーボネート樹脂、スピラン樹脂、アモルファスポリオレ
フィン、ポリカーボネート、ポリアミド、ポリアリレー
ト、ポリサルホン、ポリアリルサルホン、ポリエーテル
サルホン、ポリエーテルイミド、ポリイミド、ジアリル
フタレート、フッ素樹脂、ポリエステルカーボネート、
ノルボルネン系樹脂(ARTON)、脂環式アクリル樹
脂(オプトレッツ)、シリコン樹脂、アクリルゴム、シ
リコンゴム等の透明材料が挙げられる(なお、「(メ
タ)アクリル」とは「アクリル及びメタクリル」を示
す。)。
Specific examples of the core material include polystyrene,
Styrene / methyl methacrylate copolymer, (meth) acrylic resin, polymethylpentene, allyl glycol carbonate resin, spirane resin, amorphous polyolefin, polycarbonate, polyamide, polyarylate, polysulfone, polyallylsulfone, polyethersulfone, polyether Imide, polyimide, diallyl phthalate, fluororesin, polyester carbonate,
Transparent materials such as a norbornene-based resin (ARTON), an alicyclic acrylic resin (Optrez), a silicone resin, an acrylic rubber, and a silicone rubber are included. (Note that “(meth) acryl” means “acryl and methacryl”. .).

【0018】一方、クラッド材としては、屈折率の低い
透明材料の中から選定することができ、プラスチックや
エラストマー等の有機材料が挙げられる。
On the other hand, the clad material can be selected from transparent materials having a low refractive index, and examples thereof include organic materials such as plastics and elastomers.

【0019】クラッド材の具体例としては、ポリエチレ
ン、ポリプロピレン、ポリメチルメタクリレート、フッ
化ポリメチルメタアクリレート、ポリ塩化ビニル、ポリ
塩化ビニリデン、ポリ酢酸ビニル、ポリエチレン−酢酸
ビニル共重合体、ポリビニルアルコール、ポリエチレン
−ポリビニルアルコール共重合体、フッ素樹脂、シリコ
ン樹脂、天然ゴム、ポリイソプレンゴム、ポリブタジエ
ンゴム、スチレン−ブタジエン共重合体、ブチルゴム、
ハロゲン化ブチルゴム、クロロプレンゴム、アクリルゴ
ム、エチレン−プロピレン−ジエン共重合体(EPD
M)、アクリロニトリル−ブタジエン共重合体、フッ素
ゴム、シリコンゴム等が挙げられる。
Specific examples of the cladding material include polyethylene, polypropylene, polymethyl methacrylate, polymethyl methacrylate, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyethylene-vinyl acetate copolymer, polyvinyl alcohol, and polyethylene. -Polyvinyl alcohol copolymer, fluororesin, silicone resin, natural rubber, polyisoprene rubber, polybutadiene rubber, styrene-butadiene copolymer, butyl rubber,
Halogenated butyl rubber, chloroprene rubber, acrylic rubber, ethylene-propylene-diene copolymer (EPD
M), acrylonitrile-butadiene copolymer, fluorine rubber, silicone rubber and the like.

【0020】上記のコア材、クラッド材のうち、透明性
や屈折率等の光学特性及び同時押し出し加工性の面か
ら、コア材としては、ポリスチレン、ポリカーボネー
ト、スチレン−(メタ)アクリル共重合体(MSポリマ
ー)等が好ましく、また、クラッド材としては(メタ)
アクリル系ポリマー等が好ましい。
Among the above-mentioned core materials and cladding materials, polystyrene, polycarbonate, styrene- (meth) acryl copolymer () are used as core materials in view of optical characteristics such as transparency and refractive index and coextrudability. MS polymer) and the like, and the clad material is (meth)
Acrylic polymers are preferred.

【0021】反射層は白色顔料や散乱材を含む(メタ)
アクリル系ポリマーで形成することが好ましい。
The reflection layer contains a white pigment and a scattering material (meta).
It is preferable to use an acrylic polymer.

【0022】ここで白色顔料や散乱材としては、シリコ
ーン樹脂粒子やポリスチレン樹脂粒子等の有機ポリマー
粒子、Al23、TiO2、SiO2等の金属酸化物粒
子、BaSO4等の硫酸塩粒子、CaCO3等の炭酸塩粒
子等が挙げられ、これらの1種を単独で又は2種以上を
併用して使用することができる。
Examples of the white pigment and the scattering material include organic polymer particles such as silicone resin particles and polystyrene resin particles, metal oxide particles such as Al 2 O 3 , TiO 2 and SiO 2 , and sulfate particles such as BaSO 4. And carbonate particles such as CaCO 3 , and one of these can be used alone or in combination of two or more.

【0023】反射効率や同時押し出し加工性等を考慮し
た場合、これら白色顔料や散乱材の粒子の平均粒径は
0.1〜200μm程度特に0.5〜50μm程度であ
ることが好ましく、また、反射層構成材料(反射材)中
の含有量は0.5〜20重量%程度特に1〜10重量%
程度であることが好ましい。
In consideration of reflection efficiency, coextrusion workability, and the like, the average particle size of the particles of the white pigment and the scattering material is preferably about 0.1 to 200 μm, particularly preferably about 0.5 to 50 μm. The content in the reflective layer constituting material (reflective material) is about 0.5 to 20% by weight, particularly 1 to 10% by weight.
It is preferred that it is about.

【0024】反射層4A,4Bの厚さは特に制限されな
いが、10〜200μm特に50〜100μmとするこ
とが好適である。この厚さが薄すぎると反射される光が
少なくなるため輝度が低くなり、厚すぎると反射される
光が多くなり輝度が高くなるが、これは光源から近距離
の場合で、更に光源から離れた所では逆に輝度が低くな
る不利を伴う場合がある。
The thickness of the reflection layers 4A and 4B is not particularly limited, but is preferably 10 to 200 μm, particularly preferably 50 to 100 μm. If the thickness is too small, the reflected light decreases and the luminance decreases.If the thickness is too large, the reflected light increases and the luminance increases. In some places, the brightness may be disadvantageously reduced.

【0025】なお、コア2の直径は特に制限されない
が、通常2〜30mm特に5〜15mm程度とされる。
また、管状クラッド3の肉厚は通常0.05〜4mm特
に0.2〜2mm程度とされる。
The diameter of the core 2 is not particularly limited, but is usually about 2 to 30 mm, especially about 5 to 15 mm.
The wall thickness of the tubular cladding 3 is usually about 0.05 to 4 mm, especially about 0.2 to 2 mm.

【0026】本発明においては、帯状の反射層の形成条
数や形成位置、反射層の帯幅や反射層間の間隔等には特
に制限はなく、反射層で反射された光が指向性を有する
複数の光条として放出されるように形成すれば良い。
In the present invention, there are no particular restrictions on the number of strips and the formation positions of the reflection layer, the band width of the reflection layer, the distance between the reflection layers, and the like, and the light reflected by the reflection layer has directivity. What is necessary is just to form so that it may be emitted as a plurality of striations.

【0027】図4(a)のように2条の反射層4A,4
Bを形成した光伝送チューブ1であれば、図4(a)に
示すLA,LBの領域に指向性のある高輝度の反射光を得
ることができる。また、図4(b),(c)に示す如
く、3条の反射層4A,4B,4Cを形成した光伝送チ
ューブ1A,1Bであれば、それぞれ図4(b),
(c)に示すLA,LB,LCの領域に指向性のある高輝
度の反射光を得ることができる。
As shown in FIG. 4A, two reflection layers 4A and 4
If the light transmission tube 1 is formed with B, it is possible to obtain high-brightness reflected light having directivity in the regions L A and L B shown in FIG. Also, as shown in FIGS. 4B and 4C, if the light transmission tubes 1A and 1B are formed with three reflecting layers 4A, 4B and 4C, respectively, FIGS.
It is possible to obtain reflected light with high directivity in the areas of L A , L B and L C shown in FIG.

【0028】各反射層の幅(周方向長さ)は、例えばコ
アの周長の3〜30%、好ましくは5〜20%程度とさ
れるが、この範囲外であっても良い。
The width (length in the circumferential direction) of each reflective layer is, for example, 3 to 30%, preferably 5 to 20% of the circumferential length of the core, but may be outside this range.

【0029】本発明の光伝送チューブでは、図4(d)
に示す如く、反射層4A,4Bを覆うように、管状クラ
ッド3の外表面に反射性保護層5を形成しても良い。こ
のような反射性保護層5を形成した光伝送チューブ1C
であれば、反射層4A,4Bにピンホール等の欠陥があ
る場合、この欠陥部分を通って反射層4A,4Bの裏側
に漏洩する光や反射層4A,4Bの側部から漏洩する光
をこの反射性保護層5で反射することにより光の損失を
低減し、反射層4A,4Bの反対側の輝度をより一層高
めることができる。
In the optical transmission tube of the present invention, FIG.
As shown in FIG. 5, a reflective protective layer 5 may be formed on the outer surface of the tubular clad 3 so as to cover the reflective layers 4A and 4B. Optical transmission tube 1C having such a reflective protective layer 5 formed thereon
Then, when there is a defect such as a pinhole in the reflection layers 4A and 4B, light leaking to the back side of the reflection layers 4A and 4B or light leaking from the side portions of the reflection layers 4A and 4B through the defect portion. By reflecting the light on the reflective protective layer 5, the loss of light can be reduced, and the brightness on the opposite side of the reflective layers 4A and 4B can be further increased.

【0030】この反射性保護層5の構成材料としては、
反射層4A,4B,4Cから漏れた光を外部に透過させ
ず、また、この光を吸収せず、効率的に反射させるもの
が好ましく、具体的には、銀、アルミニウム等の金属箔
や金属シート、或いは光を散乱する上記したような散乱
性粒子を分散した塗膜等を用いることができる。反射性
保護層5は、反射層4A,4B,4Cを覆う領域にのみ
設けても良いが、反射光の放出部(図4のLA,LB,L
Cの領域に対応する管状クラッド外周部)以外の管状ク
ラッド3の外周面を覆うように設けても良い。
The constituent material of the reflective protective layer 5 is as follows.
It is preferable that light that leaks from the reflective layers 4A, 4B, and 4C is not transmitted to the outside, and that does not absorb the light and efficiently reflects the light. Specifically, a metal foil or metal such as silver or aluminum is preferable. A sheet or a coating film in which the above-described scattering particles that scatter light are dispersed can be used. Reflective protective layer 5, reflective layer 4A, 4B, may be provided only in the region covering the 4C but release portion of the reflected light (Fig. 4 L A, L B, L
The outer peripheral surface of the tubular clad 3 other than the outer peripheral surface of the tubular clad corresponding to the region C ) may be provided.

【0031】この光伝送チューブを製造するには、多色
押出機例えば3個のスクリュー部を有する3色押出機を
用い、コア材、クラッド材、及び白色顔料又は散乱材を
含む反射材を押出機に導入し、コア材を円柱状に、反射
材をこの円柱状コア材の外周面上に複数の帯状に、かつ
クラッド材を上記コア材及び反射材を覆うチューブ状に
同時に押し出せば良い。
To manufacture this light transmission tube, a core material, a clad material, and a reflective material containing a white pigment or a scattering material are extruded using a multicolor extruder, for example, a three-color extruder having three screw portions. The core material is extruded into a cylindrical shape, the reflective material is extruded into a plurality of strips on the outer peripheral surface of the columnar core material, and the clad material is extruded simultaneously into a tube shape covering the core material and the reflective material. .

【0032】この方法によれば、屈折率や物性の異なる
3種の材料を同時に押し出し、3種の機能を持った積層
構造体を一度に成形することができ、成形速度が速く、
しかも各材料が軟化状態で積層されるため、各層間の密
着性にも優れた光伝送チューブを効率的に製造すること
ができる。なお、反射材を複数条に分割して押し出すた
めには、反射材の口金を複数個用いても良く、1つの口
金に反射層間の間隔に相当する仕切壁を設けて押し出し
ても良い。
According to this method, three types of materials having different refractive indices and physical properties can be simultaneously extruded, and a laminated structure having three types of functions can be formed at a time.
Moreover, since the respective materials are laminated in a softened state, an optical transmission tube having excellent adhesion between the respective layers can be efficiently manufactured. In order to divide and extrude the reflecting material into a plurality of strips, a plurality of bases of the reflecting material may be used, or one base may be provided with a partition wall corresponding to the interval between the reflective layers and extruded.

【0033】反射性保護層を形成する場合には、上記押
し出し成形後に金属箔や金属シートを貼着したり、散乱
性粒子を分散させた塗料を塗布したりすれば良いが、同
時押し出しにより反射性保護層を形成することも可能で
ある。
When a reflective protective layer is formed, a metal foil or a metal sheet may be adhered after the extrusion molding, or a coating material in which scattering particles are dispersed may be applied. It is also possible to form a hydrophilic protective layer.

【0034】なお、本発明の光伝送チューブは上記以外
の方法で製造されても良い。
The light transmission tube of the present invention may be manufactured by a method other than the above.

【0035】[0035]

【実施例】以下に実施例、参考例及び比較例を挙げて本
発明をより具体的に説明する。説明の便宜上、まず参考
例を示す。
The present invention will be more specifically described below with reference to examples, reference examples and comparative examples. First, a reference example will be described for convenience of explanation.

【0036】参考例1 3個のスクリュー部を有し、コア材、クラッド材及び反
射材を同時に押し出せる多色押し出し機を用い、表1に
示すコア材、アクリルポリマーからなるクラッド材、こ
のクラッド材と同様のアクリルポリマーにTiO2(平
均粒径10μm)を15重量%分散させた反射材を同時
に押し出し機の口金部に導入し、この口金部から直径6
mmの円柱状ロッド(コア)、その外周表面に幅約1.
5mm、厚さ0.01〜0.02mmの帯状の白色反射
層、これらロッド及び反射層を覆う管状クラッドを同時
に押し出し、外径6.5mmの円柱状光伝送チューブN
o.1〜No.3を作成した。
REFERENCE EXAMPLE 1 A multicolor extruder having three screw portions and capable of simultaneously extruding a core material, a clad material and a reflective material was used. A reflective material in which 15% by weight of TiO 2 (average particle size: 10 μm) is dispersed in the same acrylic polymer as the material is simultaneously introduced into a die of an extruder.
mm cylindrical rod (core) with a width of about 1.
A 5 mm, 0.01-0.02 mm thick strip-shaped white reflective layer, a tubular cladding covering these rods and the reflective layer are simultaneously extruded to form a cylindrical optical transmission tube N having an outer diameter of 6.5 mm.
o. 1 to No. 3 was created.

【0037】得られた光伝送チューブの一端から光を入
射させた場合の反射層形成側と反対側の側面輝度をミノ
ルタCS100色彩色差計で測定し、結果を表1に示し
た。なお、光源には緑色のLED(印加電流:20m
A、出射光量:1lumen)を用いた。
The side luminance on the side opposite to the reflective layer forming side when light was incident from one end of the obtained light transmission tube was measured with a Minolta CS100 colorimeter. The results are shown in Table 1. The light source is a green LED (applied current: 20 m).
A, the amount of emitted light: 1 lumen) was used.

【0038】比較のため、メタクリル酸メチル、メタク
リル酸ラウリル、ベンゾイルパーオキサイドからなるモ
ノマー溶液を外径6mm、長さ25mのFEP(四フッ
化エチレン−六フッ化プロピレン共重合体)チューブに
注入し、これを65℃の温浴槽に置き、両端からそれぞ
れ3.5kg/cm2の圧力を加えながら、3時間重合
反応させて固化させることにより、コアとFEP管状ク
ラッドとの間に反射層のない、外径6.5mm、長さ2
0mの光伝送チューブNo.4を得、この光伝送チュー
ブについても上記と同様に側面輝度の測定を行って結果
を表1に示した。
For comparison, a monomer solution comprising methyl methacrylate, lauryl methacrylate, and benzoyl peroxide was injected into an FEP (ethylene tetrafluoride-hexafluoropropylene copolymer) tube having an outer diameter of 6 mm and a length of 25 m. This is placed in a hot bath at 65 ° C. and subjected to a polymerization reaction for 3 hours while applying a pressure of 3.5 kg / cm 2 from both ends to solidify, so that there is no reflective layer between the core and the FEP tubular cladding. , 6.5mm outside diameter, 2 length
0 m light transmission tube No. No. 4 was obtained, and the side luminance of the light transmission tube was measured in the same manner as described above. The results are shown in Table 1.

【0039】[0039]

【表1】 [Table 1]

【0040】この結果から、コアと管状クラッドとの間
に反射層を形成することにより側面輝度を格段に高める
ことができることがわかる。
From these results, it is understood that the lateral luminance can be remarkably increased by forming the reflective layer between the core and the tubular cladding.

【0041】実施例1 反射材押し出し用の口金を2個配置することにより、約
2mm幅の反射層を80度(図2において、反射層4
A,4Bの中心線におろした半径の交叉角θが80°)
の間隔をあけて2条押し出したこと以外は、参考例1の
No.1の場合と同様に行って本発明の光伝送チューブ
を製造し、参考例1と同様にして光を入射させ、光入射
位置から50cmの距離における側面の出射光の角度分
布を調べ、結果を図5(a)に示した。
Example 1 By arranging two ferrules for pushing out the reflecting material, the reflecting layer having a width of about 2 mm was set at 80 degrees (in FIG.
The intersection angle θ of the radii lowered to the center lines of A and 4B is 80 °)
No. 2 of Reference Example 1 except that two strips were extruded at intervals. 1, the light transmission tube of the present invention was manufactured, light was incident thereon in the same manner as in Reference Example 1, and the angle distribution of outgoing light from the side surface at a distance of 50 cm from the light incident position was examined. This is shown in FIG.

【0042】比較例1 参考例1のNo.1の光伝送チューブについて、実施例
1と同様にして出射光の角度分布を調べ、結果を図5
(b)に示した。
Comparative Example 1 With respect to No. 1 light transmission tube, the angular distribution of outgoing light was examined in the same manner as in Example 1, and the results were shown in FIG.
(B).

【0043】比較例2 反射材押し出し用の口金部を広くして、約3mm幅の反
射層を押し出したこと以外は参考例1のNo.1と同様
にして光伝送チューブを製造し、実施例1と同様にして
出射光の角度分布を調べ、結果を図5(c)に示した。
Comparative Example 2 No. 1 of Reference Example 1 except that the base for extruding the reflective material was widened and the reflective layer having a width of about 3 mm was extruded. An optical transmission tube was manufactured in the same manner as in Example 1, and the angular distribution of the emitted light was examined in the same manner as in Example 1. The results are shown in FIG.

【0044】図5(a)〜(c)より、反射層を形成す
ることにより指向性の高い光を得ることができ、特に、
本発明に従って、反射層を複数条形成することにより、
複数本の指向性の高い出射光を得ることができることが
わかる。また、この場合において、反射層の幅を変化さ
せたり、反射層の条数を変化させることで、出射角度分
布(指向性)を自在に変化させることができることがわ
かる。
5 (a) to 5 (c), it is possible to obtain light having high directivity by forming the reflection layer.
According to the present invention, by forming a plurality of reflective layers,
It can be seen that a plurality of outgoing light with high directivity can be obtained. Further, in this case, it is understood that the emission angle distribution (directivity) can be freely changed by changing the width of the reflection layer or changing the number of the reflection layers.

【0045】[0045]

【発明の効果】以上詳述した通り、本発明の光伝送チュ
ーブによれば、側面から指向性のある複数条の光を放出
させて、輝度を効果的に高めることができる。
As described above in detail, according to the light transmission tube of the present invention, a plurality of directional lights can be emitted from the side surface, and the luminance can be effectively increased.

【0046】また、本発明の光伝送チューブの製造方法
によれば、このような光伝送チューブを高い生産性にて
容易かつ効率的に製造することができる。
According to the method for manufacturing an optical transmission tube of the present invention, such an optical transmission tube can be easily and efficiently manufactured with high productivity.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の光伝送チューブの実施の形態を示す斜
視図である。
FIG. 1 is a perspective view showing an embodiment of an optical transmission tube of the present invention.

【図2】図1のII−II線に沿う断面図である。FIG. 2 is a sectional view taken along the line II-II in FIG.

【図3】図2のIII−III線に沿う断面図である。FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

【図4】反射層の形成例を示す断面図である。FIG. 4 is a cross-sectional view illustrating an example of forming a reflective layer.

【図5】実施例1(図5(a))、比較例1(図5
(b))及び比較例2(図5(c))の光伝送チューブ
の出射光の角度分析結果を示すグラフである。
FIG. 5 shows Example 1 (FIG. 5A) and Comparative Example 1 (FIG. 5A).
It is a graph which shows the (b)) and the angle analysis result of the emitted light of the light transmission tube of the comparative example 2 (FIG.5 (c)).

【符号の説明】[Explanation of symbols]

1,1A,1B,1C 光伝送チューブ 2 コア 3 管状クラッド 4A,4B,4C 反射層 5 反射性保護層 1, 1A, 1B, 1C Light transmission tube 2 Core 3 Tubular cladding 4A, 4B, 4C Reflective layer 5 Reflective protective layer

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) C08G 64/00 C08G 64/00 C08L 33/08 C08L 33/08 Fターム(参考) 2H038 AA54 BA42 2H050 AA11 AA15 AB43Y AB45X AB50X AC01 AD00 4J002 AC011 AC031 AC061 AC081 AC091 BB031 BB061 BB121 BB151 BB171 BB181 BB221 BB241 BC031 BC032 BC071 BD041 BD101 BD121 BE021 BF021 BF051 BG041 BG051 BG061 BG081 CE001 CF161 CG011 CG041 CL001 CM041 CN031 CP031 CP032 DE136 DE146 DE236 DG046 DJ016 FD096 FD206 GP00 4J029 AA08 AA09 AB07 AC01 AE04 KH08 4J100 AA02P AA03Q AA06P AA17P AA18P AB02P AC03P AC04P AC21P AD02P AE18P AG04P AG04Q AG70P AL03P AL03Q AM02P AR11P AR15R AR22R AS02P AS02Q AS03P AS07P BA10P BB10P CA01 CA04 CA05 DA63 JA35 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat ゛ (Reference) C08G 64/00 C08G 64/00 C08L 33/08 C08L 33/08 F term (Reference) 2H038 AA54 BA42 2H050 AA11 AA15 AB43Y AB45X AB50X AC01 AD00 4J002 AC011 AC031 AC061 AC081 AC091 BB031 BB061 BB121 BB151 BB171 BB181 BB221 BB241 BC031 BC032 BC071 BD041 BD101 BD121 BE021 BF021 BF051 BG041 BG051 BG061 BG081 CE001 CF161 CG011 CG041 CL001 CM041 CN031 CP031 CP032 DE136 DE146 DE236 DG046 DJ016 FD096 FD206 GP00 4J029 AA08 AA09 AB07 AC01 AE04 KH08 4J100 AA02P AA03Q AA06P AA17P AA18P AB02P AC03P AC04P AC21P AD02P AE18P AG04P AG04Q AG70P AL03P AL03Q AM02P AR11P AR15R AR22R AS02P AS02P AS03P03P07

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 管状クラッドと、該管状クラッドの構成
材料よりも高屈折率の材料で構成されるコアとを備える
光伝送チューブにおいて、 該管状クラッドとコアとの間に該管状クラッドの長さ方
向に沿って帯状の反射層を形成し、前記コアを通る光を
該反射層で反射・散乱させて該反射層形成側と反対側の
管状クラッド側周面から放出させるようにした光伝送チ
ューブであって、 該帯状の反射層を複数条形成し、前記コアを通る光を管
状クラッド側周面から複数の方向に放出させるようにし
たことを特徴とする光伝送チューブ。
1. An optical transmission tube comprising a tubular clad and a core made of a material having a higher refractive index than the constituent material of the tubular clad, wherein the length of the tubular clad is between the tubular clad and the core. A light transmission tube in which a strip-shaped reflection layer is formed along the direction, and light passing through the core is reflected and scattered by the reflection layer and emitted from the peripheral surface of the tubular cladding side opposite to the reflection layer forming side. An optical transmission tube, wherein a plurality of strip-shaped reflection layers are formed, and light passing through the core is emitted in a plurality of directions from a tubular clad side peripheral surface.
【請求項2】 請求項1において、前記管状クラッドが
(メタ)アクリル系ポリマーよりなり、前記コアがポリ
スチレン、ポリカーボネート又はスチレン−(メタ)ア
クリル共重合体よりなり、前記反射層が白色顔料又は散
乱材を含む(メタ)アクリル系ポリマーよりなることを
特徴とする光伝送チューブ。
2. The method according to claim 1, wherein the tubular cladding is made of a (meth) acrylic polymer, the core is made of polystyrene, polycarbonate or a styrene- (meth) acrylic copolymer, and the reflecting layer is a white pigment or a scattering material. An optical transmission tube comprising a (meth) acrylic polymer containing a material.
【請求項3】 請求項1又は2に記載の光伝送チューブ
を製造する方法であって、 多色押出機を用い、コア材、クラッド材、及び反射材を
該多色押出機に導入し、コア材を円柱状に、反射材をこ
の円柱状コア材外周面上に複数条の帯状に、かつクラッ
ド材を上記コア材及び反射材を覆うチューブ状にそれぞ
れ同時に押し出すことを特徴とする光伝送チューブの製
造方法。
3. The method for producing an optical transmission tube according to claim 1, wherein a core material, a clad material, and a reflecting material are introduced into the multicolor extruder using a multicolor extruder. Optical transmission characterized by simultaneously extruding a core material into a cylindrical shape, a reflective material into a plurality of strips on the outer peripheral surface of the cylindrical core material, and a clad material into a tube shape covering the core material and the reflective material. Tube manufacturing method.
JP10209751A 1998-04-20 1998-07-24 Light transmission tube and its production Withdrawn JP2000039517A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP10209751A JP2000039517A (en) 1998-07-24 1998-07-24 Light transmission tube and its production
GB9908637A GB2336660B (en) 1998-04-20 1999-04-15 Light transmission tubes and methods for manufacturing the light transmission tubes
US09/292,463 US6278827B1 (en) 1998-04-20 1999-04-15 Light transmission tubes
DE19917886A DE19917886B4 (en) 1998-04-20 1999-04-20 Light transmission tube and method of manufacturing the light transmission tube
US09/761,584 US20010016105A1 (en) 1998-04-20 2001-01-18 Method of manufacturing light transmission tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10209751A JP2000039517A (en) 1998-07-24 1998-07-24 Light transmission tube and its production

Publications (1)

Publication Number Publication Date
JP2000039517A true JP2000039517A (en) 2000-02-08

Family

ID=16578041

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2000039517A (en)

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* Cited by examiner, † Cited by third party
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JP2002525643A (en) * 1998-08-10 2002-08-13 ミネソタ マイニング アンド マニュファクチャリング カンパニー Light fiber and manufacturing method thereof
KR100883191B1 (en) 2006-12-21 2009-02-12 엘지전자 주식회사 Apparatus for manufacturing a light pipe
JP2014523603A (en) * 2011-04-28 2014-09-11 エル イー エス エス・リミテッド Waveguide device for illumination system
JP2017091839A (en) * 2015-11-11 2017-05-25 パナソニックIpマネジメント株式会社 Light guide body
US10649126B2 (en) 2013-10-18 2020-05-12 L.E.S.S. Ltd Holder and systems for waveguide-based illumination

Cited By (7)

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JP2002525643A (en) * 1998-08-10 2002-08-13 ミネソタ マイニング アンド マニュファクチャリング カンパニー Light fiber and manufacturing method thereof
KR100883191B1 (en) 2006-12-21 2009-02-12 엘지전자 주식회사 Apparatus for manufacturing a light pipe
JP2014523603A (en) * 2011-04-28 2014-09-11 エル イー エス エス・リミテッド Waveguide device for illumination system
US9541694B2 (en) 2011-04-28 2017-01-10 L.E.S.S. Ltd Waveguide apparatus for illumination systems
US9891364B2 (en) 2011-04-28 2018-02-13 L.E.S.S. Ltd Waveguide apparatus for illumination systems
US10649126B2 (en) 2013-10-18 2020-05-12 L.E.S.S. Ltd Holder and systems for waveguide-based illumination
JP2017091839A (en) * 2015-11-11 2017-05-25 パナソニックIpマネジメント株式会社 Light guide body

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