JPS63195904A - Linear lighting apparatus - Google Patents
Linear lighting apparatusInfo
- Publication number
- JPS63195904A JPS63195904A JP62027373A JP2737387A JPS63195904A JP S63195904 A JPS63195904 A JP S63195904A JP 62027373 A JP62027373 A JP 62027373A JP 2737387 A JP2737387 A JP 2737387A JP S63195904 A JPS63195904 A JP S63195904A
- Authority
- JP
- Japan
- Prior art keywords
- rod
- light
- cladding
- refractive index
- clad
- 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.)
- Granted
Links
- 238000005253 cladding Methods 0.000 claims description 19
- 239000000463 material Substances 0.000 description 15
- 238000009792 diffusion process Methods 0.000 description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は線状照明具に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to a linear lighting device.
［従来の技術］
円形端面に入射した光を線状に出射させる照明具が、特
開昭ｓｏ−ｔｔａｓｏｅ号公報に提案されている。構成
を図−２に示す、光伝送用ロー２ド４の外周面上に直線
状に拡散部５を設け、ロッドに沿って、線状に光を出射
させるものであり、発熱の伴なわない線状照明が可能で
ある。[Prior Art] A lighting device that linearly emits light incident on a circular end face has been proposed in Japanese Patent Application Laid-Open No. 1999-11101. The configuration is shown in Figure 2. A diffusion section 5 is provided linearly on the outer circumferential surface of an optical transmission rod 4, and light is emitted linearly along the rod, and does not generate heat. Linear illumination is possible.
しかし、この照明具は、光がロッド内を伝送する際、損
失が大きく、入射端から離れるに従って出射光量が減少
する性質を有している。However, this lighting device has a property that there is a large loss when the light is transmitted within the rod, and the amount of output light decreases as the distance from the input end increases.
最も光透過性のよい石英ガラスロッドを用いた場合でも
入射端よりロッド長１７０ｃｍの距離において、ロッド
長１０ｃ＋ｓの場合に比べて、出射光の明るさが５Ｂ％
に減少することが前記公報に報告されている。Even when using a silica glass rod with the highest light transmittance, at a distance of 170 cm from the input end, the brightness of the output light is 5B% compared to when the rod length is 10 c + s.
It is reported in the above publication that the
〔発明の解決しようとする問題点］
前記照明具における光損失の原因として、ロッド材料自
身の光吸収、微視的な不均一性による散乱、ロッド表面
の微細な凹凸、傷、汚れ等による、その部分からの光の
しみ出しなどがある。特にロッド表面の不完全性による
損失は大きく、これに材料内部からの散乱が重畳し、ロ
ッド長が長くなると、出射光量が大きく低下する。[Problems to be Solved by the Invention] The causes of light loss in the lighting device include light absorption by the rod material itself, scattering due to microscopic non-uniformity, minute irregularities, scratches, dirt, etc. on the rod surface. There is light seeping out from that part. In particular, the loss due to imperfections on the rod surface is large, and this is superimposed on scattering from inside the material, and as the rod length increases, the amount of emitted light decreases significantly.
本発明の目的は、前記照明具の有していたこの問題点を
解消しようとするものである。The object of the present invention is to solve this problem that the above-mentioned lighting equipment had.
［問題点を解決するための手段］
本発明は前述の目的でなされたものであり、光を透過す
るロッドの側面外周に、そのロッドよりも屈折率の低い
クラッドを被覆し、さらにロッドとクラッドの境界の一
部に線状に光拡散部を設けたことを特徴とする線状照明
具を提供するものである。[Means for Solving the Problems] The present invention has been made for the above-mentioned purpose, and includes coating the outer periphery of the side surface of a rod that transmits light with a cladding having a lower refractive index than that of the rod, and further forming a bond between the rod and the cladding. The present invention provides a linear lighting device characterized in that a linear light diffusion portion is provided in a part of the boundary of the linear lighting device.
以下、本発明の実施例に従って説明する。Embodiments of the present invention will be explained below.
しかし本発明はこの実施例に限定されるものではない。However, the present invention is not limited to this embodiment.
第１図に本発明の基本構成を示す。FIG. 1 shows the basic configuration of the present invention.
■は光伝送ロッド、２はクラッド、３は光拡散物質であ
る。2 is a light transmission rod, 2 is a cladding, and 3 is a light diffusing material.
ロッド材、クラツド材を同時に加熱延伸、融着すること
により作られたクラッドロッドに、クラッド表面からロ
ッドにまで達する溝を形成し、その溝に光拡散物質を埋
め込んだ。A groove extending from the clad surface to the rod was formed in a clad rod made by simultaneously heating, stretching, and fusing a rod material and a clad material, and a light-diffusing substance was embedded in the groove.
このようにして作成した、クラッドロッドのロッドとク
ラッドの境界面は、平滑な鏡面をなしており、ロッド−
内を伝送する光の良好な反射面として機能する。また、
拡散面にあたらずロッド端まで伝送した光を再びロッド
内に戻すために入射端面の対向面であるロッド端を反射
面とすることもできる。材料としては、石英ガラス、多
成分ガラス、プラスティックなどを用いることができる
が、クランド材は、ロッド材よりも屈折率の低いもので
なければならない。The interface between the rod and the clad of the clad rod created in this way has a smooth mirror surface, and the rod-clad interface is smooth and mirror-like.
Acts as a good reflective surface for light transmitted through it. Also,
The rod end, which is the surface opposite to the incident end surface, can also be used as a reflective surface in order to return the light that has not hit the diffusing surface but has been transmitted to the rod end into the rod. Although quartz glass, multicomponent glass, plastic, etc. can be used as the material, the crund material must have a lower refractive index than the rod material.
拡散物質としては、ＴｉＯ２など高屈折率のものが望ま
しい。As the diffusion material, a material with a high refractive index such as TiO2 is desirable.
また、溝目体を粗面化し、拡散面とすることも可能であ
り、その場合、拡散物質を埋め込まなくてもよい。溝の
形状、巾は、必要とされる光量、照明範囲などに合わせ
て決定する。一般的に、溝巾を広くすると出射光量が増
し、照明範囲も広くなる。また、溝は一本である必要は
なく、本数を増やすことにより、出射光量を大きくする
ことができる。また、溝は直線でも曲線でもよい。Moreover, it is also possible to roughen the grooved body to form a diffusion surface, and in that case, it is not necessary to embed a diffusion substance. The shape and width of the groove are determined according to the required amount of light, illumination range, etc. Generally, increasing the groove width increases the amount of emitted light and widens the illumination range. Further, the number of grooves does not need to be one, and by increasing the number of grooves, the amount of emitted light can be increased. Furthermore, the grooves may be straight or curved.
なお１本照明具の製法として、ロッドにあらかじめ、拡
散面を設けた後、クラッドを被覆することも可能である
が、この場合も、ロッドとクラッドの境界面は、可能な
かぎり平滑、かつ清浄でなければならない。Note that it is also possible to manufacture a single lighting device by providing a diffusion surface on the rod in advance and then covering it with the cladding, but in this case as well, the interface between the rod and the cladding should be as smooth and clean as possible. Must.
［作用］
クラッドロッドの円形端部に入射した光は、ロッドとク
ラッドの境界面で全反射をくり返しながら、ロッド内を
伝送するが、その途中拡散面に当った光の一部は、クラ
ッドロッドのレンズ効果により指向性をもって出射する
。その様子を第３図に示す、出射角度は、ロッドとクラ
ッドの屈折率により決定される。ロッドとクラッドの屈
折率差が大きいと臨界角が小さくなり、したがって、ロ
ッド長方向に垂直な方向への光の出射角度範囲は小さく
なる。ロッドのみの場合は、空気がクラッドであると考
えることができるので、クラッドつきロッドの場合（第
３図（ａ））に比べ、光の出射角度範囲は小さくなる（
第３図（ｂ））。[Function] The light incident on the circular end of the clad rod is transmitted through the rod while repeating total reflection at the interface between the rod and cladding, but some of the light that hits the diffusing surface on the way passes through the clad rod. Emits light with directionality due to the lens effect. The situation is shown in FIG. 3. The output angle is determined by the refractive index of the rod and the cladding. When the refractive index difference between the rod and the cladding is large, the critical angle becomes small, and therefore, the range of light emission angles in the direction perpendicular to the rod length direction becomes small. In the case of only a rod, the air can be considered to be the cladding, so compared to the case of a rod with cladding (Fig. 3(a)), the range of light emission angles is smaller (
Figure 3(b)).
なお、ロッドのみの場合の方が、臨界角が小さく、全反
射する角度範囲を大きくとれるので、損失が小さくなる
はずであるが、実際は、ロッド表面からの光の逃げが大
きく、損失が大きい、ロッドにクラッドを被覆し、全反
射面を平滑、かつ清浄な鏡面に保つことにより、ロッド
表面からの光の逃げが抑えられ、損失は小さくなる。In addition, in the case of only a rod, the critical angle is smaller and the angle range for total reflection can be larger, so the loss should be smaller, but in reality, the light escapes from the rod surface and the loss is large. By covering the rod with a cladding and keeping the total reflection surface smooth and a clean mirror surface, light escape from the rod surface is suppressed and loss is reduced.
［実施例］
本実施例においては、ロッド材として、光学ガラス（屈
折率１．８２０） 、クラツド材としてソーダライムガ
ラス（屈折率 １．５１８）を用いた。コア：クラツド
比は約１０：１である。光拡散物質として、二酸化チタ
ン（屈折率２．９０３）をシリコン樹脂（屈折率１．４
０４）に混ぜてロッドの軸に平行に設けた溝に流し込ん
だ、クラッドロッド径は、１０ｍｍ、溝の幅は１．２ｅ
ｍ、ロッド長は１ｍである。また、拡散面にあたらずロ
ッド端まで伝送した光をふたたびロッド内に戻すために
入射端面の対向面であるロッド端は、アルミ板を設けて
反射面とした。[Example] In this example, optical glass (refractive index 1.820) was used as the rod material, and soda lime glass (refractive index 1.518) was used as the cladding material. The core:clad ratio is about 10:1. Titanium dioxide (refractive index 2.903) was used as a light diffusing substance, and silicone resin (refractive index 1.4
The clad rod diameter was 10 mm, and the groove width was 1.2e.
m, the rod length is 1 m. In addition, in order to return the light that has been transmitted to the rod end without hitting the diffusing surface into the rod, an aluminum plate was provided at the rod end, which is the surface opposite the incident end surface, to serve as a reflective surface.
光源に反射板付ハロゲンランプ（１２Ｖ ５ＱＯＷ）を
用いた場合の測定結果では、ロッドからの距 ′離１
０ｃｍの位置で照度的１０００１ｕｘ、入射端及び反射
端よりロッドの長さ方向に約４ｃ＋ｓをに抑えることが
できた。（Ｌ：照度）
なお、前記文献の方法に準じて同じロッド材にクラッド
を被覆せず、同じ幅の拡散部を設けた場合について、同
様の測定を行なったところ、照度は最大で約７００１ｕ
ｘ 、照度むらは１８％程度あり、クラッドを被覆する
ことにより、照度が増し、照度むらも減少することが確
認できた。The measurement results using a halogen lamp with a reflector (12V 5QOW) as the light source show that the distance from the rod is 1'.
At the 0 cm position, the illuminance was 10,001 ux, and it was possible to suppress the illuminance to about 4 c+s in the length direction of the rod from the incident end and the reflective end. (L: Illuminance) When similar measurements were performed on the same rod material without cladding and provided with a diffusion section of the same width according to the method of the above-mentioned document, the illuminance was approximately 7001 u at maximum.
x, the illuminance unevenness was about 18%, and it was confirmed that by covering the cladding, the illuminance increased and the illuminance unevenness decreased.
［発明の効果］
光伝送体にクラッドロッドを用い、全反射面を平滑な鏡
面としたことにより、表面からの光の逃げが減少し、ロ
ッドのみの場合と比べて低損失で照明むらの小さな線状
照明が可能となった。[Effects of the invention] By using a clad rod as the light transmission body and making the total reflection surface a smooth mirror surface, the escape of light from the surface is reduced, resulting in lower loss and less uneven illumination than when using only the rod. Linear lighting is now possible.
この照明具は、同じロフト材を用いて、屈折率の異なる
クラッドを用いることにより、先の出射角度を変えるこ
とができる。In this lighting device, the output angle can be changed by using the same loft material and cladding with different refractive index.
また、ロッドのみの場合のように、ロッド表面の傷、汚
れ等を防ぐための保護筒をかぶせる必要がない事も大き
な利点である。Another great advantage is that unlike the case of just the rod, there is no need to cover the rod surface with a protective tube to prevent scratches, dirt, etc.
ロッド、２はクラッド、３は光拡散物質である。The rod, 2 is a cladding, and 3 is a light diffusing material.
第２図は、前記従来例に提案されている照明具の基本構
成である。４はロッド、５は光拡散物質、６はハロゲン
ランプである。FIG. 2 shows the basic configuration of the lighting fixture proposed in the conventional example. 4 is a rod, 5 is a light diffusing substance, and 6 is a halogen lamp.
第３図は、入射方向と垂直な方向への出射の様子を示し
た説明図であり、（ａ）は本発明、（ｂ）はクラッドな
しのロッドの場合である。FIG. 3 is an explanatory view showing the state of emission in a direction perpendicular to the direction of incidence, in which (a) shows the case of the present invention, and (b) shows the case of a rod without a cladding.
Claims (1)
散部を設けたことを特徴とする線状照明具。[Claims] A light-transmitting rod is coated with a cladding having a lower refractive index than that of the rod on the outer periphery of the side surface, and a light diffusing portion is provided linearly at a part of the boundary between the rod and the cladding. Features a linear lighting fixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62027373A JP2597094B2 (en) | 1987-02-10 | 1987-02-10 | Linear lighting fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62027373A JP2597094B2 (en) | 1987-02-10 | 1987-02-10 | Linear lighting fixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63195904A true JPS63195904A (en) | 1988-08-15 |
| JP2597094B2 JP2597094B2 (en) | 1997-04-02 |
Family
ID=12219242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62027373A Expired - Lifetime JP2597094B2 (en) | 1987-02-10 | 1987-02-10 | Linear lighting fixture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2597094B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5537885U (en) * | 1978-09-04 | 1980-03-11 |
-
1987
- 1987-02-10 JP JP62027373A patent/JP2597094B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5537885U (en) * | 1978-09-04 | 1980-03-11 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2597094B2 (en) | 1997-04-02 |
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