JP2565356B2 - Light scattering edge treatment method - Google Patents
Light scattering edge treatment methodInfo
- Publication number
- JP2565356B2 JP2565356B2 JP62280298A JP28029887A JP2565356B2 JP 2565356 B2 JP2565356 B2 JP 2565356B2 JP 62280298 A JP62280298 A JP 62280298A JP 28029887 A JP28029887 A JP 28029887A JP 2565356 B2 JP2565356 B2 JP 2565356B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- face
- solvent
- plastic optical
- light scattering
- 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.)
- Expired - Lifetime
Links
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、光ファイバディスプレイ等に使用するプラ
スチック光ファイバの端面から出る光を広い角度から見
ることができるようにする為の光ファイバ端面の光散乱
処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an end face of an optical fiber for allowing the light emitted from the end face of a plastic optical fiber used for an optical fiber display or the like to be viewed from a wide angle. The present invention relates to a light scattering treatment method.
プラスチック光ファイバを用いたサインディスプレイ
等は色彩も豊かで色調も変化に富み、表現力に富んでい
る。Sign displays using plastic optical fibers are rich in colors, rich in color tone, and expressive.
近年、装飾用途にポリメチルメタクリレート系プラス
チックを芯として特殊なフッ素樹脂を鞘とするステップ
イデックス型のプラスチック光ファイバが利用されてい
る。2. Description of the Related Art In recent years, step-dex type plastic optical fibers having a core of polymethylmethacrylate plastic and a sheath of special fluororesin have been used for decorative purposes.
プラスチック光ファイバの出射側端面を研磨により平
滑に仕上げた時、端面から出た光を観察すると、受光角
と呼ばれる角度を超えたところで急に見えなくなる。プ
ラスチック光ファイバでは、受光角は通常約60゜（光軸
からの角度はその半分の約30゜）である。When the emission end face of the plastic optical fiber is finished to be smooth by polishing, when observing the light emitted from the end face, it suddenly disappears when it exceeds an angle called a light receiving angle. In a plastic optical fiber, the acceptance angle is usually about 60 ° (half the angle from the optical axis, about 30 °).
プラスチック光ファイバを用いたサインディスプレイ
等では、受光角を超えた広い角度から光を見ることが求
められることが多い。これまでに幾つかの端面の光散乱
加工方法が知られている。In sign displays and the like using a plastic optical fiber, it is often required to view light from a wide angle exceeding the light receiving angle. Some light-scattering processing methods of an end surface are known so far.
例えば、端面を紙やすりで擦過する方法、サンド
ブラスト処理方法、光散乱塗料やガラスビーズ等を塗
布する方法、凹凸のある熱板で加熱処理する方法等で
ある。For example, a method of rubbing the end face with sandpaper, a method of sandblasting, a method of applying a light-scattering paint or glass beads, a method of heat-treating with a hot plate having irregularities, and the like.
しかし、これらの光散乱処理方法には次の問題点があ
る。端面を紙やすりで擦過する方法では、作業者の熟
練を要する上に、処理後に端面の汚れを除去する工程が
必要である。サンドブラスト処理方法は工業的な方法
であるが、大きな設備を必要とし、と同様に処理後に
端面の汚れを取る工程が必要である。光散乱塗料やガ
ラスビーズ等を塗布する方法は、異物を加えるため、全
体の光量が減衰し暗くなる。凹凸のある熱板で加熱処
理する方法は、作業者の熟練を必要として、端面部の直
径が光ファイバの直径より大きくなるので、加工の手順
で不都合が生じる場合もある。However, these light scattering treatment methods have the following problems. The method of rubbing the end surface with sandpaper requires the skill of the operator and also requires a step of removing dirt on the end surface after the processing. Although the sandblasting method is an industrial method, it requires a large facility, and likewise requires a step of removing dirt from the end surface after the treatment. In the method of applying the light-scattering paint or the glass beads, the amount of light is attenuated and the image becomes dark because foreign matter is added. The method of heat treatment with the uneven hot plate requires skill of the operator, and the diameter of the end face portion becomes larger than the diameter of the optical fiber, so that there may be a problem in the processing procedure.
本発明者らは、これらの問題点を解決するため鋭意研
究した結果、端面を汚染せず、異物を付着することな
く、端面の光散乱性をコントロールできる本発明の方法
に到達した。As a result of earnest studies to solve these problems, the present inventors have arrived at a method of the present invention capable of controlling the light scattering property of the end face without contaminating the end face and adhering foreign matter.
即ち、本発明は、ポリメチルメタクリレート系の芯を
有するプラスチック光ファイバの端面を処理するに当た
り、光ファイバの端面を、相対湿度10％以上の雰囲気下
で、１気圧下の沸点が60℃以下の溶剤に10秒以下の時間
接触させた後、溶剤を気化させることを特徴とする光フ
ァイバ端面の処理方法に関するものである。That is, the present invention, when treating the end face of a plastic optical fiber having a polymethylmethacrylate-based core, the end face of the optical fiber has a boiling point of 60 ° C. or less under 1 atmosphere in an atmosphere having a relative humidity of 10% or more. The present invention relates to a method for treating an end face of an optical fiber, which comprises vaporizing the solvent after contacting the solvent for 10 seconds or less.
プラスチック光ファイバの端面を溶剤に接触させる仕
方には、種々あり、特に限定しないが、浸漬、刷毛塗
り、スポンジ塗りなどがある。例えば第１図に示すよう
に、プラスチック光ファイバ１の端面２を、浅い水平な
皿４に入れた溶剤３の上方から垂直に0.5mm位浸漬する
ことにより接触させた後、取り出す。浸漬部の長さは、
特に限定しないが、見栄え等の点から、0.5mm位が経験
的に良い。又、第２図に示すように、プラスチック光フ
ァイバ１の端面２に溶剤を浸した刷毛５に接触させた
後、離す等である。There are various methods for bringing the end surface of the plastic optical fiber into contact with the solvent, and there is no particular limitation, and there are dipping, brush coating, sponge coating, and the like. For example, as shown in FIG. 1, the end face 2 of the plastic optical fiber 1 is contacted by vertically immersing it about 0.5 mm from above the solvent 3 placed in a shallow horizontal dish 4, and then taken out. The length of the immersion part is
Although there is no particular limitation, 0.5 mm or so is empirically good in terms of appearance. Further, as shown in FIG. 2, the end face 2 of the plastic optical fiber 1 is brought into contact with the brush 5 in which the solvent is soaked, and then separated.
溶剤としては、１気圧下の沸点が60℃以下であれば良
く、その種類は限定されないが、例えば、ジクロルメタ
ン、アセトン、酢酸エチル、ジエチルエーテル等揮発性
の高いものであることが必要である。１気圧下の沸点が
60℃を超えると、光散乱効果が少なくなる。接触時間は
溶剤の種類にもよるが、10秒を超えると、プラスチック
光ファイバが脆くなるなどの弊害が出る。The solvent may have a boiling point of 60 ° C. or less under 1 atm, and the kind thereof is not limited, but it is necessary to have a highly volatile solvent such as dichloromethane, acetone, ethyl acetate, diethyl ether. Boiling point at 1 atm
If it exceeds 60 ° C, the light scattering effect will be reduced. The contact time depends on the type of solvent, but if it exceeds 10 seconds, adverse effects such as brittleness of the plastic optical fiber will occur.
驚くべきことに、溶剤処理後の乾燥雰囲気の相対湿度
の影響が大きく、相対湿度10％未満の乾燥雰囲気では、
端面の光散乱効果は出ない。恐らく溶剤がプラスチック
光ファイバの端面を少し溶かしながら気化する時、気化
熱を奪い空気中の水分が凝結してその結果端面の状態が
思いがけない光散乱状態になるものであろう。Surprisingly, the relative humidity of the dry atmosphere after solvent treatment has a large effect, and in a dry atmosphere with a relative humidity of less than 10%,
There is no light scattering effect on the end face. Perhaps, when the solvent vaporizes while slightly melting the end face of the plastic optical fiber, it will take away the heat of vaporization and the moisture in the air will condense, resulting in an unexpected light scattering condition on the end face.
予めプラスチック光ファイバの端面部の直径がプラス
チック光ファイバの直径を上回らないように切断してお
き、それに溶剤処理を行うと、端面の寸法を実用上変化
させることなく端面の光散乱処理を施すことができる。If the diameter of the end surface of the plastic optical fiber is cut in advance so that it does not exceed the diameter of the plastic optical fiber, and if it is subjected to solvent treatment, the light scattering treatment of the end surface will be performed without changing the dimensions of the end surface practically. You can
又、予めプラスチック光ファイバの端面部を熱処理に
よりプラスチック光ファイバの直径より広げておき、そ
れに溶剤処理を行うと、先端部が大きく、かつ、均一に
光散乱する端面を作ることができる。In addition, if the end face of the plastic optical fiber is expanded in advance from the diameter of the plastic optical fiber by heat treatment and then subjected to a solvent treatment, an end face with a large tip and uniform light scattering can be formed.
以下に実施例を示す。 Examples will be shown below.
実施例１ ポリメチルメタクリレート系プラスチック光ファイバ
として直径1mmの旭化成工業（株）製ルミナスLB1000を2
m用い、溶剤としてジクロルメタンを用い、25℃、相対
湿度58％の室内で、プラスチック光ファイバの両方の端
面をカミソリで用いてほぼ垂直に切断した。ガラス製シ
ャーレにジクロルメタンを5mmの深さまで入れ、プラス
チック光ファイバの一方の端面を約0.5mm浸漬させ、２
秒後に取り出し溶剤を気化させた。溶剤に接触した端面
部分は白くなっていた。Example 1 Luminous LB1000 manufactured by Asahi Kasei Kogyo Co., Ltd. having a diameter of 1 mm was used as a polymethylmethacrylate plastic optical fiber.
m, using dichloromethane as the solvent, and cutting both ends of the plastic optical fiber almost vertically using a razor in a room at 25 ° C and 58% relative humidity. Dichloromethane was put into a glass dish to a depth of 5 mm, and one end of the plastic optical fiber was immersed for about 0.5 mm.
After a second, the solution was taken out and the solvent was vaporized. The end face portion that was in contact with the solvent was white.
20Wの反射鏡付きハロゲンラップを光源として反射鏡
の端から10cmのところに、光量の大きい中央部にプラス
チック光ファイバの他方の端面をランプに向けてセット
した。溶剤で光散乱処理した面から5mの位置で観察した
ところ、プラスチック光ファイバの光軸からほぼ90゜の
角度でも端面の光を見ることが出来た。A halogen wrap with a 20 W reflecting mirror was used as a light source, and 10 cm from the end of the reflecting mirror, the other end face of the plastic optical fiber was set to the lamp in the central part where the light intensity was large. When observed at a position 5 m from the surface which was subjected to light scattering treatment with a solvent, the light on the end face could be seen even at an angle of approximately 90 ° from the optical axis of the plastic optical fiber.
実施例２、３ 比較例 第１表に示す溶剤を用いた以外は、実施例１と同じ条
件で溶剤処理を実施した。Examples 2 and 3 Comparative Example The solvent treatment was carried out under the same conditions as in Example 1 except that the solvents shown in Table 1 were used.
溶剤処理した光ファイバを、10mmピッチで碁盤の目状
に垂直に1.2mm径の穴を開けた10mm厚みの合板に、光フ
ァイバの処理端面が5mm程度合板面より突き出るよう
に、４本ずつセットした。更に光ファイバの他方の端面
を、良く切れるカミソリでカットし、この各光ファイバ
のカット端面を纏めて、光源である20Wの反射鏡付きハ
ロゲンランプの中央部で、反射鏡の端から10cmの所に固
定し、発光側の光ファイバの光軸から０゜及び80゜の角
度から、明るさの比較を行った。Set the solvent-treated optical fibers to a 10 mm plywood with holes of 1.2 mm diameter perpendicular to the grid pattern at a pitch of 10 mm so that the processed end faces of the optical fibers protrude about 5 mm from the plywood surface. did. Furthermore, cut the other end face of the optical fiber with a razor that cuts well, put together the cut end faces of each optical fiber, and at the center of the halogen lamp with a 20 W reflector that is the light source, place 10 cm from the end of the reflector. Then, the brightness was compared from the angle of 0 ° and 80 ° from the optical axis of the optical fiber on the light emitting side.
溶剤の種類及び結果を第１表に示す。 The types of solvent and the results are shown in Table 1.
実施例４ ポリメチルメタクリレート系プラスチック光ファイバ
として直径0.75mmのルミナスLB750（商品名、旭化成工
業（株）製）を2m、溶剤としてジクロルメタンを用い、
25℃、相対湿度75％の室内で、プラスチック光ファイバ
の両方の端面をカミソリを用いてほぼ垂直に切断した
後、130℃に調整した熱板により光ファイバの端面の直
径を最初の0.75mmから1.5mmまで広げた。ガラス製シャ
ーレにジクロルメタンを5mmの深さまで入れ、プラスチ
ック光ファイバの一方の端面を約0.5mm浸漬させ、２秒
後に取り出し溶剤を気化させた。溶剤に接触した端面部
分は白くなっていた。 Example 4 Luminous LB750 (trade name, manufactured by Asahi Kasei Co., Ltd.) having a diameter of 0.75 mm was used as a polymethylmethacrylate-based plastic optical fiber for 2 m, and dichloromethane was used as a solvent.
In a room at 25 ° C and 75% relative humidity, cut both end faces of a plastic optical fiber almost vertically with a razor, and then adjust the end face diameter of the optical fiber from the first 0.75 mm with a hot plate adjusted to 130 ° C. Spread to 1.5mm. Dichloromethane was put into a glass petri dish to a depth of 5 mm, one end surface of the plastic optical fiber was immersed for about 0.5 mm, and after 2 seconds, it was taken out and the solvent was vaporized. The end face portion that was in contact with the solvent was white.
20Wの反射鏡付きハロゲンランプを光源として反射鏡
の端から10cmの所に、光量の大きい中央部にプラスチッ
ク光ファイバの他方の端面をランプに向けてセットし
た。溶剤で光散乱処理した面から5mの位置から観察した
ところ、プラスチック光ファイバの光軸からほぼ90゜の
角度でも、直径を1.5mmに広げた端面の光を見ることが
できた。A halogen lamp with a 20 W reflecting mirror was used as a light source, and 10 cm from the end of the reflecting mirror, the other end face of the plastic optical fiber was set to the lamp in the central part where a large amount of light was emitted. When observed from a position 5 m from the surface subjected to light scattering treatment with a solvent, it was possible to see the light on the end face whose diameter was expanded to 1.5 mm even at an angle of approximately 90 ° from the optical axis of the plastic optical fiber.
本発明の方法により、プラスチック光ファイバの端面
の光散乱処理が容易に迅速に均一にできるようになっ
た。又、溶剤を必要に応じて選定することにより散乱の
程度をある程度任意にコントロールすることができるよ
うになった。According to the method of the present invention, the light scattering treatment on the end face of the plastic optical fiber can be easily and quickly made uniform. Further, the degree of scattering can be controlled to some extent by selecting the solvent as necessary.
第１図及び第２図は、本発明の端面処理法の例を説明す
るための断面図である。 １……プラスチック光ファイバ ２……プラスチック光ファイバの端面 ３……溶剤 ４……皿 ５……筆1 and 2 are cross-sectional views for explaining an example of the end face processing method of the present invention. 1 ... Plastic optical fiber 2 ... End face of plastic optical fiber 3 ... Solvent 4 ... Plate 5 ... Brush
Claims (3)
プラスチック光ファイバの端面を処理するに当たり、光
ファイバの端面を、相対湿度10％以上の零囲気下で、１
気圧下の沸点が60℃以下の溶剤に10秒以下の時間接触さ
せた後、溶剤を気化させることを特徴とする光ファイバ
端面の処理方法。1. When processing an end surface of a plastic optical fiber having a polymethylmethacrylate-based core, the end surface of the optical fiber is kept in a zero atmosphere with a relative humidity of 10% or more.
A method for treating an end face of an optical fiber, which comprises contacting a solvent having a boiling point of 60 ° C. or less under atmospheric pressure for 10 seconds or less, and then vaporizing the solvent.
ファイバの直径を上回らないように予め切断されたもの
である特許請求の範囲第１項記載の方法。2. The method according to claim 1, wherein the processed end face of the optical fiber is precut so as not to exceed the diameter of the plastic optical fiber.
りプラスチック光ファイバの直径より広げられているも
のである特許請求の範囲第１項記載の方法。3. The method according to claim 1, wherein the treated end surface of the optical fiber is expanded in advance by heat treatment from the diameter of the plastic optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62280298A JP2565356B2 (en) | 1987-11-07 | 1987-11-07 | Light scattering edge treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62280298A JP2565356B2 (en) | 1987-11-07 | 1987-11-07 | Light scattering edge treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01123201A JPH01123201A (en) | 1989-05-16 |
| JP2565356B2 true JP2565356B2 (en) | 1996-12-18 |
Family
ID=17623035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62280298A Expired - Lifetime JP2565356B2 (en) | 1987-11-07 | 1987-11-07 | Light scattering edge treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2565356B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992004400A1 (en) * | 1990-09-04 | 1992-03-19 | Ohno Research And Development Laboratories Co., Ltd. | Plastic optical member having light diffusing layer on surface, and light quantity control member |
| JPH10239538A (en) * | 1997-02-28 | 1998-09-11 | Yasuhiro Koike | Plastic optical fiber machining method |
| US6500353B1 (en) * | 1999-06-25 | 2002-12-31 | Fitel Usa Corp. | Disposable device for end finishing of plastic optical fiber |
-
1987
- 1987-11-07 JP JP62280298A patent/JP2565356B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01123201A (en) | 1989-05-16 |
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