JP2019087421A - Diffusion cover material for an optical fiber, and an illumination structure using the same - Google Patents
Diffusion cover material for an optical fiber, and an illumination structure using the same Download PDFInfo
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- JP2019087421A JP2019087421A JP2017215077A JP2017215077A JP2019087421A JP 2019087421 A JP2019087421 A JP 2019087421A JP 2017215077 A JP2017215077 A JP 2017215077A JP 2017215077 A JP2017215077 A JP 2017215077A JP 2019087421 A JP2019087421 A JP 2019087421A
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- 239000000463 material Substances 0.000 title claims abstract description 91
- 239000013307 optical fiber Substances 0.000 title claims abstract description 91
- 238000009792 diffusion process Methods 0.000 title claims abstract description 71
- 238000005286 illumination Methods 0.000 title claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 21
- 238000002834 transmittance Methods 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 abstract description 131
- 239000011247 coating layer Substances 0.000 abstract description 34
- 230000000052 comparative effect Effects 0.000 description 24
- 239000004925 Acrylic resin Substances 0.000 description 13
- 229920000178 Acrylic resin Polymers 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 238000012360 testing method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000013308 plastic optical fiber Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Inorganic materials [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920005668 polycarbonate resin Polymers 0.000 description 2
- 239000004431 polycarbonate resin Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
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- Light Guides In General And Applications Therefor (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
本発明は、光ファイバ用拡散カバー材の改良、詳しくは、光ファイバ素線の発光面積を拡大して照明等に利用することができ、また発光時において光ファイバ素線が透けて見えることもなく、しかも、充分な発光輝度を確保できる光ファイバ用拡散カバー材、及びそれを用いた照明構造に関するものである。 INDUSTRIAL APPLICABILITY The present invention improves the diffusion cover material for optical fiber, and more specifically, can enlarge the light emitting area of the optical fiber strand and use it for illumination etc. Also, the optical fiber strand can be seen through at the time of light emission The present invention also relates to an optical fiber diffusion cover material capable of ensuring sufficient light emission luminance, and an illumination structure using the same.
近年、照明や光装飾等に用いる発光器具として、コアとクラッドを有するプラスチック系光ファイバを利用したものが開発されている。これは導光部材であるプラスチック系光ファイバの周面発光を照明等に利用したものであるが、この種の導光部材としては、プラスチック系光ファイバだけでなく石英系光ファイバを利用することもできる。 In recent years, as a light emitting device used for illumination, light decoration, etc., one using a plastic optical fiber having a core and a clad has been developed. Although this utilizes circumferential surface light emission of the plastic optical fiber which is a light guide member for illumination etc., not only a plastic optical fiber but also a silica optical fiber is used as this kind of light guide member. You can also.
しかしながら、上記石英系の光ファイバ素線を発光器具に利用する場合、製造可能な素線の太さに限界があるため、一本の光ファイバ素線では充分な発光面積を得ることができなかった。また光ファイバ素線を束で使用して発光面積を拡大する場合には、使用する光ファイバ素線の本数分だけコストが高く付くため実現性に欠けていた。 However, when using the above-mentioned optical fiber strand of a silica system for a light-emitting tool, since there is a limit in the thickness of the strand which can be manufactured, a sufficient light emitting area can not be obtained with one optical fiber strand. The In addition, in the case of using a bundle of optical fiber strands to expand the light emitting area, the cost is increased by the number of the optical fiber strands used, which is lacking in feasibility.
一方、従来においては、光ファイバ素線を固定する溝部を備えた支持プレートにカバープレートを被せて構成された照明器具が公知となっているが(特許文献１参照)、透明なカバープレートを被せただけでは光の散乱が生じないため、発光時に光ファイバ素線が透けて見えてしまいカバープレートによる均一な面発光を行うことができなかった。 On the other hand, in the related art, a lighting fixture configured by covering a cover plate on a support plate provided with a groove for fixing an optical fiber strand has been known (see Patent Document 1), but a transparent cover plate is covered. Since light scattering does not occur only by light, an optical fiber strand can be seen through at the time of light emission, and uniform surface light emission can not be performed by the cover plate.
また特許文献２では、上記支持プレートに半透明のカバープレートを被せる内容も示唆されているが(特許文献２参照)、一層から成るカバープレートでは、光を散乱させて光ファイバ素線を隠蔽することはできるものの、カバープレートの厚みが大きい分、光の透過性が落ちて暗くなってしまい実用レベルの発光輝度を得ることが難しかった。 Patent Document 2 also suggests that the support plate is covered with a semi-transparent cover plate (see Patent Document 2), but in a single-layer cover plate, light is scattered to conceal the optical fiber strands. However, because the cover plate has a large thickness, the light transmission is lowered and darkened, making it difficult to obtain a practical level of luminance.
他方、透明なカバープレートの表面に粗し加工を行って光を散乱させる方法も考えられたが、この方法では光の散乱が起こるものの、発光時に光ファイバ素線が透けて見える問題を解決できなかった。また上記従来技術では、カバープレートの他に光ファイバ素線を固定するための支持プレートが必要であったため、器具が大きくなりがちであった。 On the other hand, a method of roughening the surface of a transparent cover plate to scatter light was also considered, but although light scattering occurs, this method can solve the problem that the optical fiber strand is seen through at the time of light emission. It was not. Further, in the above-mentioned prior art, since the support plate for fixing the optical fiber in addition to the cover plate is required, the instrument tends to be large.
本発明は、上記問題に鑑みて為されたものであり、その目的とするところは、石英系光ファイバ素線の発光面積を拡大して照明等に利用することができ、また発光時において光ファイバ素線が透けて見えることもなく、しかも、光ファイバ素線の保持具も不要で充分な発光輝度が得られる光ファイバ用拡散カバー材、及びそれを用いた照明構造を提供することにある。 The present invention has been made in view of the above problems, and the object of the present invention is to expand the light emitting area of the silica fiber strand and use it for illumination etc. An object of the present invention is to provide an optical fiber diffusion cover material which can obtain sufficient light emission luminance without a fiber strand being seen through and requiring no holder for an optical fiber strand and an illumination structure using the same. .
本発明者が上記課題を解決するために採用した手段を添付図面を参照して説明すれば次のとおりである。 The means employed by the inventor for solving the above problems will be described below with reference to the accompanying drawings.
即ち、本発明は、熱可塑性樹脂を主材料とする透明な第一被覆層１と、光拡散剤が添加された熱可塑性樹脂を主材料とする半透明の第二被覆層２とを含んで光ファイバ用拡散カバー材を構成すると共に、前記第一被覆層１の外側に、第一被覆層１よりも厚みの小さい第二被覆層２を積層状態で部分的に形成する一方、第二被覆層２が形成されていない第一被覆層１の露出面には、光ファイバ素線Ｆを挿入する凹部11を形成し、更に前記第一被覆層１と第二被覆層２から成る積層体を、前記凹部11内に装着した光ファイバ素線Ｆの側面から第二被覆層２に向けて光を照射したとき、この光が積層体を透過する全光線透過率が25〜45％となるように設計した点に特徴がある。 That is, the present invention includes a transparent first covering layer 1 mainly composed of a thermoplastic resin, and a translucent second covering layer 2 mainly composed of a thermoplastic resin to which a light diffusing agent is added. A second covering layer 2 having a smaller thickness than the first covering layer 1 is partially formed in a laminated state on the outside of the first covering layer 1 while constituting a diffusion covering material for optical fiber. On the exposed surface of the first covering layer 1 where the layer 2 is not formed, a concave portion 11 for inserting the optical fiber strand F is formed, and a laminate comprising the first covering layer 1 and the second covering layer 2 is further provided. When the light is irradiated from the side surface of the optical fiber strand F mounted in the recess 11 toward the second covering layer 2, the total light transmittance of the light passing through the laminate is 25 to 45%. It is characterized in that it was designed.
また上記拡散カバー材については、全体を棒状または板状に形成すると共に、凹部11を第一被覆層１の長さ方向に沿って形成し、更に第二被覆層２の面積を第一被覆層１の露出面の面積よりも大きくすることにより線状発光部材として好適に利用できる。 Moreover, about the said spreading | diffusion cover material, while forming in rod shape or plate shape as a whole, forming the recessed part 11 along the length direction of the 1st coating layer 1, the area of the 2nd coating layer 2 is made into a 1st coating layer. By making it larger than the area of the exposed surface of 1, it can utilize suitably as a linear light emitting member.
一方、本発明においては、上記構成に代えて、熱可塑性樹脂を主材料とする透明な第一被覆層１と、光拡散剤が添加された熱可塑性樹脂を主材料とする半透明の第二被覆層２とを含んで光ファイバ用拡散カバー材を構成すると共に、棒状または板状を成す前記第一被覆層１の端面を除く外周面に、第一被覆層１よりも厚みの小さい第二被覆層２を積層状態で全周的に形成する一方、第一被覆層１の内側に、光ファイバ素線Ｆを挿入する中空部12を長さ方向に沿って形成し、更に前記第一被覆層１と第二被覆層２から成る積層体を、前記中空部12内に装着した光ファイバ素線Ｆの側面から第二被覆層２に向けて光を照射したとき、この光が積層体を透過する全光線透過率が25〜45％となるように設計して構成することもできる。 On the other hand, in the present invention, instead of the above configuration, a transparent first covering layer 1 mainly composed of a thermoplastic resin, and a semitransparent second mainly composed of a thermoplastic resin to which a light diffusing agent is added While forming a diffusion cover material for an optical fiber including the covering layer 2 and having an outer peripheral surface excluding the end face of the rod-like or plate-like first covering layer 1, the second covering layer is thinner than the first covering layer 1 While the covering layer 2 is formed in the entire circumference in the laminated state, the hollow portion 12 for inserting the optical fiber strand F is formed along the length direction inside the first covering layer 1 and further the first covering When light is irradiated from the side surface of the optical fiber strand F mounted in the hollow portion 12 to the second covering layer 2, the light from the layer 1 and the second covering layer 2 is applied to the laminate. The total light transmittance to be transmitted may be designed and configured to be 25 to 45%.
また上記第二被覆層２については、厚みを0.3mm以内とし、かつ、光拡散剤の添加量を0.5wt％(好ましくは0.1wt％)以下とすることで、第二被覆層２による光ファイバ素線Ｆの隠蔽と、光ファイバ素線Ｆから入射される光の拡散を高いレベルで両立できる。 In addition, with respect to the second covering layer 2, the optical fiber of the second covering layer 2 can be formed by setting the thickness to 0.3 mm or less and the addition amount of the light diffusing agent to 0.5 wt% (preferably 0.1 wt%) or less. The concealment of the strands of wire F and the diffusion of light incident from the strand of optical fiber F can be compatible at a high level.
また上記第一被覆層１と第二被覆層２の材料に関しては、それぞれの主材料に相溶性のある熱可塑性樹脂を使用することによって第二被覆層２の剥がれによる発光性能の低下を防止できる。 Further, with regard to the materials of the first covering layer 1 and the second covering layer 2, it is possible to prevent a decrease in light emission performance due to peeling of the second covering layer 2 by using a thermoplastic resin compatible with each of the main materials. .
また本発明では、上記光ファイバ用拡散カバー材を用いた照明構造として、第一被覆層１の凹部11に光ファイバ素線Ｆを装着すると共に、この凹部11が形成された第一被覆層１の露出面に両面テープＴを貼り付け、更にこの両面テープＴの反対面を被取付け面Ｗに貼り付けて拡散カバー材Ｃを被取付け面Ｗに固定する構造を採用できる。 In the present invention, as an illumination structure using the above-mentioned diffusion cover material for optical fiber, the first covering layer 1 in which the optical fiber strand F is attached to the recess 11 of the first covering layer 1 and the recess 11 is formed. A double-sided adhesive tape T may be attached to the exposed surface, and the opposite surface of the double-sided adhesive tape T may be attached to the attachment surface W to fix the diffusion cover material C to the attachment surface W.
本発明では、透明な第一被覆層の外周面に半透明の第二被覆層を積層して拡散カバー材を構成し、更にこれらの積層体の全光線透過率を25〜45％としたことにより、光ファイバ素線を発光させた際、光ファイバ素線を隠蔽しつつ光ファイバ素線からの光を拡散することができるため、拡散カバー材を面発光させて光ファイバ素線の発光面積を格段に増大させることができる。 In the present invention, the semitransparent second coating layer is laminated on the outer peripheral surface of the transparent first coating layer to constitute a diffusion cover material, and the total light transmittance of these laminates is 25 to 45%. Thus, when light is emitted from the optical fiber, the light from the optical fiber can be diffused while concealing the optical fiber. Therefore, the light emission area of the optical fiber is caused to emit light from the diffusion cover material. Can be dramatically increased.
また本発明の拡散カバー材においては、上記第一被覆層に積層した第二被覆層の厚み及び光拡散剤の添加量によって全光線透過率の調整が行えるため、拡散カバー材の基材となる第一被覆層の厚みを大きくした場合でも、光の透過性が落ちて暗くなる心配はなく実用レベルの充分な発光輝度を得ることができる。 Further, in the diffusion cover material of the present invention, since the total light transmittance can be adjusted by the thickness of the second cover layer laminated on the first cover layer and the addition amount of the light diffusion agent, it becomes a base material of the diffusion cover material Even when the thickness of the first covering layer is increased, there is no concern that the light transmission may be reduced and the light may be darkened, and sufficient luminous brightness of a practical level can be obtained.
しかも、本発明の拡散カバー材においては、第一被覆層に光ファイバ素線を固定するための凹部または中空部を設けているため、光ファイバ素線を固定するための保持具を使用する必要がなく、発光器具をコンパクトに構成できる。また保持具が不要となるため、拡散カバー材の形態もより自由に設計することができる。 Moreover, in the diffusion cover material of the present invention, since the first covering layer is provided with the recess or the hollow portion for fixing the optical fiber, it is necessary to use a holder for fixing the optical fiber. The light emitting device can be configured compactly. Further, since the holder is not necessary, the form of the diffusion cover material can be designed more freely.
したがって、本発明により、太さに限界のある石英系光ファイバ素線の発光面積を、使用本数を増やさずに低コストで拡大できる光ファイバ用拡散カバー材およびそれを用いた照明器具を提供できることから、本発明の実用的利用価値は頗る高い。 Therefore, according to the present invention, it is possible to provide an optical fiber diffusion cover material capable of expanding the light emitting area of a silica-based optical fiber having a limited thickness at low cost without increasing the number used and a luminaire using the same. Thus, the practical utility value of the present invention is high.
『第一実施形態』
次に、本発明の第一実施形態について図１〜図３に基づいて説明する。なお図中、符号Ｃで指示するのものは、拡散カバー材であり、符号１で指示するものは、第一被覆層である。また符号２で指示するものは、第二被覆層であり、符号Ｆで指示するものは、光ファイバ素線である。
First Embodiment
Next, a first embodiment of the present invention will be described based on FIGS. 1 to 3. In addition, what is designated by the code | symbol C in a figure is a diffusion cover material, and what is designated by the code | symbol 1 is a 1st coating layer. Moreover, what is indicated by code 2 is a second covering layer, and what is indicated by code F is an optical fiber strand.
「光ファイバ用拡散カバー材の構成及び使用方法」
[１]拡散カバー材の基本構成について
まず本実施形態では、図１及び図２に示すように、棒状の形態から成る透明な第一被覆層１と、その外側に積層して形成された半透明の第二被覆層２とから光ファイバ用の拡散カバー材Ｃを構成している。またこれら第一被覆層１と第二被覆層２の主材料には、それぞれ熱可塑性樹脂を使用すると共に、第二被覆層２の熱可塑性樹脂中にのみ光拡散剤を添加して半透明としている。
"Configuration and use of diffusion cover material for optical fiber"
[1] Basic Configuration of Diffusion Cover Material First, in the present embodiment, as shown in FIGS. 1 and 2, a transparent first covering layer 1 in the form of a rod and a half formed by laminating it on the outside thereof A diffusion cover material C for an optical fiber is composed of the transparent second covering layer 2. As main materials of the first covering layer 1 and the second covering layer 2, thermoplastic resins are used respectively, and a light diffusing agent is added only to the thermoplastic resin of the second covering layer 2 to make it translucent. There is.
また上記第二被覆層２については、第一被覆層１よりも小さい厚みで形成すると共に、第一被覆層１の外周面を部分的に被覆するように形成している。一方、上記第二被覆層２が形成されていない第一被覆層１の露出面に対しては、光ファイバ素線Ｆを挿入するための凹部11を形成している(図２参照)。なお本実施形態での第一被覆層１の厚みとは、横断面における凹部11内面から外周面までの距離によって算出される。 The second covering layer 2 is formed to have a thickness smaller than that of the first covering layer 1 and is formed to partially cover the outer peripheral surface of the first covering layer 1. On the other hand, on the exposed surface of the first covering layer 1 where the second covering layer 2 is not formed, a recess 11 for inserting the optical fiber strand F is formed (see FIG. 2). In addition, with the thickness of the 1st coating layer 1 in this embodiment, it is calculated by the distance from the inner surface of the recessed part 11 in a cross section to an outer peripheral surface.
また更に、上記第一被覆層１と第二被覆層２とから構成される積層体については、凹部11内に装着した光ファイバ素線Ｆの側面から第二被覆層２に向けて光を照射したとき、この光が第一被覆層１及び第二被覆層２を透過する全光線透過率が25〜45％となるように第二被覆層２の厚みや光拡散剤の添加量を調整している。 Furthermore, in the case of a laminate composed of the first covering layer 1 and the second covering layer 2, light is emitted from the side surface of the optical fiber strand F mounted in the recess 11 toward the second covering layer 2 And adjust the thickness of the second covering layer 2 and the addition amount of the light diffusing agent so that the total light transmittance of the first covering layer 1 and the second covering layer 2 becomes 25 to 45%. ing.
[２]拡散カバー材の使用方法について
次に上記拡散カバー材Ｃの使用方法について説明する。まず図２に示すように、第一被覆層１の凹部11内に光ファイバ素線Ｆを挿入した後、光ファイバ素線Ｆの端面側に配置した光源(ＬＥＤ光源やレーザ光源等)から、光ファイバ素線Ｆ内に光を入射し、光ファイバ素線Ｆの側面から漏れ出た光を、第一被覆層１と第二被覆層２で拡散することによって第二被覆層２全体を発光させる。
[2] Usage of Diffusion Cover Material Next, the usage of the diffusion cover material C will be described. First, as shown in FIG. 2, after inserting an optical fiber strand F into the recess 11 of the first covering layer 1, from a light source (such as an LED light source or a laser light source) disposed on the end face side of the optical fiber strand F Light is incident into the optical fiber strand F, and light leaked from the side surface of the optical fiber strand F is diffused by the first covering layer 1 and the second covering layer 2 so that the entire second covering layer 2 emits light. Let
これにより線状発光器具として使用した場合に、光ファイバ素線Ｆ単体で発光させるよりも発光面積を格段に増大させることが可能となる。また第一被覆層１と第二被覆層２の積層体の全光線透過率が25％〜45％となるように設計したことにより、光の拡散性と発光輝度をバランス良く両立できる上に、発光時において光ファイバ素線Ｆが積層体を通して透けて見える心配もない。 As a result, when used as a linear light emitting device, it is possible to significantly increase the light emitting area as compared with light emitted by the single optical fiber F. Further, by designing the total light transmittance of the laminate of the first covering layer 1 and the second covering layer 2 to be 25% to 45%, it is possible to balance light diffusivity and light emission luminance in a well-balanced manner. There is no concern that the optical fiber F can be seen through the laminate at the time of light emission.
[３]第一被覆層について
次に上記拡散カバー材Ｃの各構成要素について説明する。まず上記第一被覆層１の形態については、本実施形態では断面が半円状を成す棒状の形態を採用しているが、断面が多角形状を成す棒状の形態や断面の縦横比が大きい板状の形態を採用することもできる。また第一被覆層１の材料については、本実施形態では、透明性に優れたアクリル系樹脂を熱可塑性樹脂として採用しているが、ポリカーボネート樹脂や熱可塑性エラストマー等のその他の樹脂を採用することもできる。
[3] First Coating Layer Next, each component of the diffusion cover material C will be described. First, as the form of the first covering layer 1, a rod-like form having a semicircular cross section is adopted in the present embodiment, but a plate having a polygonal form having a cross-sectional form or a plate having a large aspect ratio of the cross section The form of a letter can also be adopted. In addition, as the material of the first covering layer 1, in the present embodiment, an acrylic resin excellent in transparency is adopted as a thermoplastic resin, but other resins such as a polycarbonate resin and a thermoplastic elastomer may be adopted. You can also.
また上記第一被覆層１の露出面に形成する凹部11に関しては、本実施形態では、第一被覆層１の長手方向に沿って直線的に延びる溝状に形成しているが、蛇行した溝状や所定の線文字や線画を描くように屈折した溝状に形成することもできる。また上記凹部11の数に関しても、本実施形態では第一被覆層１に一つだけ形成しているが複数の凹部11を並べて形成することもできる。 Further, in the present embodiment, the recess 11 formed on the exposed surface of the first covering layer 1 is formed in the shape of a groove linearly extending along the longitudinal direction of the first covering layer 1, but a meandering groove It can also be formed in a groove shape that is refracted so as to draw a shape or a predetermined line character or line drawing. Further, with regard to the number of the concave portions 11 as well, although only one is formed in the first covering layer 1 in the present embodiment, a plurality of concave portions 11 can be formed side by side.
そしてまた、上記凹部11の幅や深さに関しても、本実施形態では、一本の光ファイバ素線Ｆが挿入できる寸法で設計しているが、複数本の光ファイバ素線Ｆを並べて挿入できる寸法や、複数本の光ファイバ素線Ｆを束(バンドルファイバ)にした状態で挿入できる寸法で設計することもできる。なお凹部11の深さに関しては、光ファイバ素線Ｆが完全に凹部11内に収まる深さで設計するのが好ましい。 Further, with regard to the width and depth of the recess 11 as well, in the present embodiment, it is designed to a size that allows insertion of one optical fiber strand F, but multiple optical fiber strands F can be inserted side by side It can also be designed with dimensions or dimensions that can be inserted in a bundle (bundle fiber) of a plurality of optical fiber strands F. The depth of the recess 11 is preferably designed so that the optical fiber F completely fits in the recess 11.
[４]第二被覆層について
一方、上記第二被覆層２に関しては、本実施形態では、第一被覆層１の曲面部分を覆うように形成しているが、拡散カバー材Ｃの可視面となる部分に第二被覆層２が形成されていればよい。また拡散カバー材Ｃ全体を棒状または板状に形成する場合には、発光面積を拡大するために、第一被覆層１の外周面を被覆している第二被覆層２の面積を、第一被覆層１の露出面の面積よりも大きくするのが好ましい。
[4] Second Covering Layer On the other hand, the second covering layer 2 is formed so as to cover the curved surface portion of the first covering layer 1 in the present embodiment, but the visible surface of the diffusion covering material C The second cover layer 2 may be formed in the portion where When the entire diffusion cover material C is formed into a bar or plate shape, the area of the second covering layer 2 covering the outer peripheral surface of the first covering layer 1 is set to the first to increase the light emitting area. The area is preferably larger than the area of the exposed surface of the covering layer 1.
また上記第二被覆層２の厚みと光拡散剤の添加量に関しても、積層体の全光線透過率を25〜45％とするために、厚み0.3mm以下、光拡散剤の添加量0.5wt％以(好ましくは0.1wt％)下とするのが好ましい。また光拡散剤の種類に関しては、本実施形態では酸化チタンの粉末を使用しているが、白色顔料として用いられる硫酸バリウムや酸化亜鉛の粉末等を光拡散剤として使用することもできる。 With respect to the thickness of the second covering layer 2 and the addition amount of the light diffusing agent, the thickness is 0.3 mm or less, and the addition amount of the light diffusing agent is 0.5 wt% in order to make the total light transmittance of the laminate 25 to 45%. It is preferable to use less than 0.1 wt%. As for the type of light diffusing agent, although titanium oxide powder is used in this embodiment, barium sulfate or zinc oxide powder or the like used as a white pigment can also be used as a light diffusing agent.
また上記第二被覆層２の材料に関しても、本実施形態ではアクリル系樹脂を熱可塑性樹脂として採用しているが、その他のＰＶＤＦ(ポリフッ化ビニリデン)等のフッ素系樹脂やポリカーボネート樹脂などを採用することもできる。なお第二被覆層２の主材料に関しては、第一被覆層１に対する第二被覆層２の剥がれを防止するために、第一被覆層１の主材料に対して相溶性のある熱可塑性樹脂(好ましくは同種材料)を使用するのが好ましい。 In addition, although the acrylic resin is adopted as the thermoplastic resin in the present embodiment as the material of the second covering layer 2, other fluorine resins such as PVDF (polyvinylidene fluoride), polycarbonate resin, etc. are adopted. It can also be done. With regard to the main material of the second covering layer 2, in order to prevent peeling of the second covering layer 2 from the first covering layer 1, a thermoplastic resin compatible with the main material of the first covering layer 1 ( Preferably, homogeneous materials are used.
また拡散カバー材Ｃの導光性能(拡散カバー材Ｃが光源から遠い部分まで明るく発光する性能)を考慮して、第二被覆層２の主材料には、第一被覆層１の主材料よりも屈折率が小さい熱可塑性樹脂を使用するのが好ましい。 Moreover, in consideration of the light guiding performance of the diffusion cover material C (the ability of the diffusion cover material C to emit light brightly to the part far from the light source), the main material of the second cover layer 2 is more than the main material of the first cover layer 1 It is preferable to use a thermoplastic resin having a small refractive index.
[５]光ファイバ素線について
また上記拡散カバー材Ｃに装着する光ファイバ素線Ｆに関しては、本実施形態では、コア材料に石英を用いた石英ガラス系光ファイバを使用している。もちろん、プラスチック系光ファイバを使用することもできるが、製造可能な太さに限界のある石英ガラス系光ファイバの方が発光面積の拡大効果が大きい。
[5] Regarding Optical Fiber Strands Further, as to the optical fiber strands F attached to the above-mentioned diffusion cover material C, in the present embodiment, a silica glass optical fiber using quartz as a core material is used. Of course, plastic-based optical fibers can also be used, but a silica glass-based optical fiber having a limit to the manufacturable thickness has a larger effect of expanding the light emitting area.
[６]拡散カバー材の取付け方法について
次に上記拡散カバー材Ｃの取付け方法について図３に基いて説明する。まず第一被覆層１の凹部11に光ファイバ素線Ｆを装着した後、この凹部11が形成された第一被覆層１の露出面に両面テープＴを貼り付ける。そして、この両面テープＴの反対面を被取付け面Ｗに貼り付けて拡散カバー材Ｃを被取付け面Ｗに固定する。これにより光ファイバ素線Ｆと拡散カバー材Ｃを用いた照明構造において、拡散カバー材Ｃの取付け作業を容易に行うことができる。
[6] Method of Attaching Diffusion Cover Material Next, a method of attaching the diffusion cover material C will be described with reference to FIG. First, an optical fiber F is attached to the recess 11 of the first covering layer 1, and then the double-sided tape T is attached to the exposed surface of the first covering layer 1 in which the recess 11 is formed. Then, the opposite surface of the double-sided adhesive tape T is attached to the mounting surface W to fix the diffusion cover material C to the mounting surface W. Thus, in the illumination structure using the optical fiber strand F and the diffusion cover material C, the operation of attaching the diffusion cover material C can be easily performed.
『第二実施形態』
「光ファイバ用拡散カバー材の構成」
[１]拡散カバー材の基本構成について
次に本発明の第二実施形態について図４〜図５に基づいて説明する。本実施形態では、棒状の第一被覆層１と、その端面を除く外周面上に積層状態で全周的に形成された第二被覆層２とから拡散カバー材Ｃを構成している。また第二被覆層２の厚みは、第一被覆層１の厚みよりも小さくし、第一被覆層１の内側には、光ファイバ素線Ｆを挿入する中空部12を長さ方向に沿って形成している。なお本実施形態での第一被覆層１の厚みとは、横断面における中空部12内面から外周面までの距離によって算出される。
"Second embodiment"
"Structure of Diffusion Cover Material for Optical Fiber"
[1] Basic Configuration of Diffusion Cover Material Next, a second embodiment of the present invention will be described based on FIGS. 4 to 5. In the present embodiment, the diffusion cover material C is configured of the rod-like first covering layer 1 and the second covering layer 2 formed on the outer peripheral surface excluding the end face in the entire circumferential state in the laminated state. Further, the thickness of the second covering layer 2 is smaller than the thickness of the first covering layer 1, and the hollow portion 12 into which the optical fiber F is inserted is made inside the first covering layer 1 along the length direction It is formed. The thickness of the first covering layer 1 in the present embodiment is calculated by the distance from the inner surface of the hollow portion 12 to the outer peripheral surface in the cross section.
また上記第一被覆層１と第二被覆層２から成る積層体については、中空部12内に装着した光ファイバ素線Ｆの側面から第二被覆層２に向けて光を照射したとき、この光が積層体を透過する全光線透過率が25〜45％となるように第二被覆層２の厚みと光拡散剤の添加量を調整している。その他の第二被覆層の条件については、実施例１と同様である。 Further, in the case of a laminate comprising the first covering layer 1 and the second covering layer 2, when light is irradiated from the side surface of the optical fiber strand F mounted in the hollow portion 12 toward the second covering layer 2, The thickness of the second covering layer 2 and the addition amount of the light diffusing agent are adjusted so that the total light transmittance through which the light passes through the laminate becomes 25 to 45%. The other conditions of the second covering layer are the same as in Example 1.
[２]第一被覆層について
上記第一被覆層１の形態については、本実施形態では断面が円形状の棒状の形態を採用しているが、断面が多角形状の棒状の形態や断面の縦横比が大きい板状の形態を採用することもできる。また本実施形態では、断面が半円状の部材を接着して断面が円形状の第一被覆層１を形成しているが、押出成形によって最初から一体になった状態で第一被覆層１を形成することもできる。
[2] Regarding the First Covering Layer As to the form of the first covering layer 1, in the present embodiment, a rod-like form having a circular cross section is employed, but the rod form having a polygonal cross section A plate-like form with a large ratio can also be adopted. Further, in the present embodiment, a member having a semicircular cross-section is adhered to form the first covering layer 1 having a circular cross-section, but the first covering layer 1 is formed in a state of being integrated from the beginning by extrusion molding. Can also be formed.
また上記第一被覆層１の中空部12に関しては、本実施形態では一つだけ形成しているが複数の中空部12を形成することもできる。また上記中空部12の大きさに関しても、本実施形態では、一本の光ファイバ素線Ｆが挿入できる寸法で設計しているが、複数本の光ファイバ素線Ｆを並べて挿入できる寸法や、複数本の光ファイバ素線Ｆを束(バンドルファイバ)にした状態で挿入できる寸法で設計することもできる。 Further, although only one hollow portion 12 of the first covering layer 1 is formed in the present embodiment, a plurality of hollow portions 12 can be formed. Further, with regard to the size of the hollow portion 12, in the present embodiment, the hollow fiber 12 is designed to be inserted into a single optical fiber strand F. However, a size in which a plurality of optical fiber strands F can be inserted side by side, It is also possible to design with dimensions that can be inserted in a state in which a plurality of optical fiber strands F are bundled (bundle fiber).
[効果の実証試験]
次に本発明の効果の実証試験について説明する。まず本試験では、製造条件の異なる複数のサンプル(下記比較例１〜６並びに実施例１〜２)を作製し、これらの各サンプルについて、第一被覆層と第二被覆層の密着性、発光時における光の拡散性、発光輝度、及び光ファイバ素線の隠蔽性についての評価を行った。なお本試験では、光拡散剤として粉末状の酸化チタンを使用した。以下に比較例１〜６並びに実施例１〜２の各サンプルの製造条件について記載する。
[Proof test of effect]
Next, a demonstration test of the effect of the present invention will be described. First, in this test, a plurality of samples with different manufacturing conditions (Comparative Examples 1 to 6 and Examples 1 and 2 below) are prepared, and for each of these samples, the adhesion between the first coating layer and the second coating layer, light emission We evaluated the diffusivity of light at the time, the luminance of light emission, and the concealability of optical fiber strands. In this test, powdered titanium oxide was used as a light diffusing agent. The manufacturing conditions of each sample of Comparative Examples 1 to 6 and Examples 1 to 2 will be described below.
「比較例１」
この比較例１では、第一被覆層の主材料にアクリル樹脂、第二被覆層の主材料にＥＴＦＥ(エチレンとテトラフルオロエチレンの共重合体)を使用して棒状の拡散カバー材を共押出成形により作製した。なお拡散カバー材の形状については第一実施形態と同様の形状を採用した。また第二被覆層の厚さは0.2mmとし、第二被覆層の熱可塑性樹脂には光拡散剤を1.30wt％添加した。また第一被覆層と第二被覆層から成る積層体の全光線透過率は18％であった。
"Comparative example 1"
In Comparative Example 1, a rod-like diffusion cover material is coextrusion molded using acrylic resin as the main material of the first covering layer and ETFE (copolymer of ethylene and tetrafluoroethylene) as the main material of the second covering layer. Made by The same shape as that of the first embodiment was adopted as the shape of the diffusion cover material. The thickness of the second covering layer was 0.2 mm, and 1.30 wt% of a light diffusing agent was added to the thermoplastic resin of the second covering layer. The total light transmittance of the laminate comprising the first covering layer and the second covering layer was 18%.
「比較例２」
この比較例２では、第一被覆層と第二被覆層の主材料にそれぞれアクリル樹脂を使用して棒状の拡散カバー材を共押出成形により作製した。なお拡散カバー材の形状については第一実施形態と同様の形状を採用した。また第二被覆層の厚さは0.2mmとし、第二被覆層のアクリル樹脂には光拡散剤を添加しなかった。また第一被覆層と第二被覆層から成る積層体の全光線透過率は91％であった。
"Comparative example 2"
In Comparative Example 2, a rod-like diffusion cover material was produced by coextrusion using acrylic resin as the main material of the first covering layer and the second covering layer. The same shape as that of the first embodiment was adopted as the shape of the diffusion cover material. The thickness of the second covering layer was 0.2 mm, and no light diffusing agent was added to the acrylic resin of the second covering layer. The total light transmittance of the laminate comprising the first covering layer and the second covering layer was 91%.
「比較例３」
この比較例３では、第一被覆層の主材料にアクリル樹脂、第二被覆層にＰＶＤＦを使用して棒状の拡散カバー材を共押出成形により作製した。なお拡散カバー材の形状については第一実施形態と同様の形状を採用した。また第二被覆層の厚さは0.2mmとし、第二被覆層のアクリル樹脂には光拡散剤を添加しなかった。また第一被覆層と第二被覆層から成る積層体の全光線透過率は84％であった。
"Comparative example 3"
In Comparative Example 3, a rod-like diffusion cover material was produced by coextrusion using acrylic resin as the main material of the first covering layer and PVDF as the second covering layer. The same shape as that of the first embodiment was adopted as the shape of the diffusion cover material. The thickness of the second covering layer was 0.2 mm, and no light diffusing agent was added to the acrylic resin of the second covering layer. The total light transmittance of the laminate comprising the first covering layer and the second covering layer was 84%.
「比較例４」
この比較例４では、第二被覆層を設けず第一被覆層のみを押出成形して棒状の拡散カバー材を作製した。なお拡散カバー材の形状については第一実施形態と同様の形状を採用した。また第一被覆層の主材料にはアクリル樹脂を使用し、光拡散剤を添加する代わりに外周面の粗し加工を行った。また第一被覆層の全光線透過率は52％であった。
"Comparative Example 4"
In Comparative Example 4, a rod-shaped diffusion cover material was produced by extruding only the first coating layer without providing the second coating layer. The same shape as that of the first embodiment was adopted as the shape of the diffusion cover material. In addition, an acrylic resin was used as the main material of the first covering layer, and the outer peripheral surface was roughened instead of adding the light diffusing agent. The total light transmittance of the first covering layer was 52%.
「比較例５」
この比較例５では、第二被覆層を設けず第一被覆層のみを押出成形して棒状の拡散カバー材を作製した。なお拡散カバー材の形状については第一実施形態と同様の形状を採用した。また第一被覆層の主材料にはアクリル樹脂を使用し、このアクリル樹脂に光拡散剤を1.30wt％添加した。また第一被覆層の全光線透過率は23％であった。
"Comparative example 5"
In Comparative Example 5, a rod-shaped diffusion cover material was produced by extruding only the first coating layer without providing the second coating layer. The same shape as that of the first embodiment was adopted as the shape of the diffusion cover material. An acrylic resin was used as the main material of the first covering layer, and 1.30 wt% of a light diffusing agent was added to the acrylic resin. The total light transmittance of the first covering layer was 23%.
「比較例６」
この比較例６では、第二被覆層を設けず第一被覆層のみを押出成形して棒状の拡散カバー材を作製した。なお拡散カバー材の形状については第一実施形態と同様の形状を採用した。また第一被覆層の主材料には光拡散剤を添加していないアクリル樹脂を使用した。また第一被覆層の全光線透過率は91％であった。
"Comparative example 6"
In Comparative Example 6, a rod-shaped diffusion cover material was produced by extruding only the first coating layer without providing the second coating layer. The same shape as that of the first embodiment was adopted as the shape of the diffusion cover material. Moreover, the acrylic resin which did not add the light-diffusion agent was used for the main material of a 1st coating layer. The total light transmittance of the first covering layer was 91%.
「実施例１」
この実施例１では、第一被覆層及び第二被覆層の主材料にそれぞれアクリル樹脂を使用して棒状の拡散カバー材を共押出成形により作製した。なお拡散カバー材の形状については第一実施形態と同様の形状を採用した。また第二被覆層の厚さは0.2mmとし、第二被覆層の熱可塑性樹脂には光拡散剤を0.05wt％添加した。また第一被覆層と第二被覆層から成る積層体の全光線透過率は34％であった。
"Example 1"
In Example 1, rod-like diffusion cover materials were produced by coextrusion using acrylic resin as the main material of the first covering layer and the second covering layer. The same shape as that of the first embodiment was adopted as the shape of the diffusion cover material. The thickness of the second covering layer was 0.2 mm, and 0.05 wt% of a light diffusing agent was added to the thermoplastic resin of the second covering layer. The total light transmittance of the laminate comprising the first coating layer and the second coating layer was 34%.
「実施例２」
この実施例２では、第一被覆層の主材料にアクリル樹脂、第二被覆層にＰＶＤＦを使用して棒状の拡散カバー材を共押出成形により作製した。なお拡散カバー材の形状については第一実施形態と同様の形状を採用した。また第二被覆層の厚さは0.2mmとし、第二被覆層の熱可塑性樹脂には光拡散剤を0.05wt％添加した。また第一被覆層と第二被覆層から成る積層体の全光線透過率は31％であった。
"Example 2"
In Example 2, a rod-like diffusion cover material was produced by coextrusion using acrylic resin as the main material of the first covering layer and PVDF as the second covering layer. The same shape as that of the first embodiment was adopted as the shape of the diffusion cover material. The thickness of the second covering layer was 0.2 mm, and 0.05 wt% of a light diffusing agent was added to the thermoplastic resin of the second covering layer. The total light transmittance of the laminate comprising the first covering layer and the second covering layer was 31%.
＜第一被覆層と第二被覆層の密着性の評価＞
次に上記比較例１〜３並びに実施例１〜２のサンプルについて、-30℃の条件下で質量1kgの鋼球を306mmの高さから落とす落球試験を行い、第一被覆層と第二被覆層の剥離が生じているか否かの確認を行った。その結果、比較例１のサンプルについては、剥離が確認されたが、それ以外の比較例及び実施例については、剥離が確認できなかった。
<Evaluation of adhesion between first coating layer and second coating layer>
Next, in the samples of Comparative Examples 1 to 3 and Examples 1 to 2 described above, a falling ball test of dropping steel balls having a weight of 1 kg from a height of 306 mm under conditions of -30 ° C was performed to obtain the first coating layer and the second coating layer. It was confirmed whether peeling of the layer had occurred. As a result, peeling was confirmed for the sample of Comparative Example 1, but peeling was not confirmed for the other Comparative Examples and Examples.
＜光の拡散性・発光輝度・光ファイバ素線の隠蔽性の評価＞
次に上記比較例１〜６並びに実施例１〜２のサンプルについて、第一被覆層の凹部に光ファイバを挿入して、この光ファイバ素線に光を入射して発光させたとき、可視面(第二被覆層がある場合にはその外周面)の外側からサンプルがどのように見えるかをそれぞれ目視で評価した。
<Evaluation of diffusivity of light, light emission brightness, concealability of optical fiber strand>
Next, with respect to the samples of Comparative Examples 1 to 6 and Examples 1 and 2, when an optical fiber is inserted into the recess of the first covering layer and light is made incident on this optical fiber to emit light, a visible surface It was visually evaluated how the sample looks from the outside of (the outer peripheral surface, if there is a second covering layer).
その結果、実施例１及び実施例２のサンプルは、光ファイバ素線が透けて見えず光が均等に拡散して第二被覆層が充分な発光したのに対し、比較例２及び比較例３、比較例６のサンプルは、光が拡散しない上に光ファイバ素線が透けて見えた。また比較例４のサンプルについても、光は拡散するものの光ファイバ素線が透けて見えた。また比較例１及び比較例５のサンプルについては、光が拡散し光ファイバ素線も透けて見えなかったものの、発光輝度が小さく非常に暗かった。以下に試験結果をまとめた表を以下に示す。
１ 第一被覆層
11 凹部
12 中空部
２ 第二被覆層
Ｃ 拡散カバー材
Ｆ 光ファイバ素線
Ｔ 両面テープ
Ｗ 被取付け面
1 First coating layer
11 recess
12 Hollow part 2 Second covering layer C Diffusion cover material F Optical fiber strand T Double-sided tape W Mounting surface
Claims (6)
前記第一被覆層(１)の外側に、第一被覆層(１)よりも厚みの小さい第二被覆層(２)が積層状態で部分的に形成される一方、第二被覆層(２)が形成されていない第一被覆層(１)の露出面には、光ファイバ素線(Ｆ)を挿入する凹部(11)が形成されており、
更に前記第一被覆層(１)と第二被覆層(２)から成る積層体については、前記凹部(11)内に装着した光ファイバ素線(Ｆ)の側面から第二被覆層(２)に向けて光を照射したとき、この光が積層体を透過する全光線透過率が25〜45％であることを特徴とする光ファイバ用拡散カバー材。 It comprises a transparent first covering layer (1) mainly composed of a thermoplastic resin, and a translucent second covering layer (2) mainly composed of a thermoplastic resin to which a light diffusing agent is added,
While a second covering layer (2) smaller in thickness than the first covering layer (1) is partially formed in a laminated state on the outside of the first covering layer (1), the second covering layer (2) In the exposed surface of the first covering layer (1) on which the first layer (1) is not formed, a recess (11) for inserting the optical fiber strand (F) is formed,
Furthermore, for the laminate comprising the first covering layer (1) and the second covering layer (2), the second covering layer (2) is viewed from the side of the optical fiber strand (F) mounted in the recess (11). A diffusion cover material for an optical fiber, characterized by having a total light transmittance of 25 to 45% at which light is transmitted through the laminate when the light is irradiated to the light.
棒状または板状を成す前記第一被覆層(１)の端面を除く外周面に、第一被覆層(１)よりも厚みの小さい第二被覆層(２)が積層状態で全周的に形成される一方、第一被覆層(１)の内側には、光ファイバ素線(Ｆ)を挿入する中空部(12)が長さ方向に沿って形成されており、
更に前記第一被覆層(１)と第二被覆層(２)から成る積層体については、前記中空部(12)内に装着した光ファイバ素線(Ｆ)の側面から第二被覆層(２)に向けて光を照射したとき、この光が積層体を透過する全光線透過率が25〜45％であることを特徴とする光ファイバ用拡散カバー材。 It comprises a transparent first covering layer (1) mainly composed of a thermoplastic resin, and a translucent second covering layer (2) mainly composed of a thermoplastic resin to which a light diffusing agent is added,
A second covering layer (2) having a thickness smaller than that of the first covering layer (1) is formed all around in an outer peripheral surface except the end face of the first covering layer (1) forming the rod or plate shape. On the other hand, inside the first covering layer (1), a hollow portion (12) into which the optical fiber (F) is inserted is formed along the length direction,
Furthermore, in the laminate comprising the first covering layer (1) and the second covering layer (2), the second covering layer (2) is formed from the side of the optical fiber strand (F) mounted in the hollow portion (12). A diffusion cover material for an optical fiber, characterized in that the total light transmittance of the light passing through the laminate is 25 to 45% when the light is irradiated toward the.
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| JP2017215077A JP2019087421A (en) | 2017-11-07 | 2017-11-07 | Diffusion cover material for an optical fiber, and an illumination structure using the same |
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| JP2017215077A JP2019087421A (en) | 2017-11-07 | 2017-11-07 | Diffusion cover material for an optical fiber, and an illumination structure using the same |
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