JPS6124684B2 - - Google Patents
Info
- Publication number
- JPS6124684B2 JPS6124684B2 JP56106629A JP10662981A JPS6124684B2 JP S6124684 B2 JPS6124684 B2 JP S6124684B2 JP 56106629 A JP56106629 A JP 56106629A JP 10662981 A JP10662981 A JP 10662981A JP S6124684 B2 JPS6124684 B2 JP S6124684B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- scratches
- light
- optical
- density
- 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
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
- G02B6/001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Description
【発明の詳細な説明】
この発明は光フアイバ照光装置の改良に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION This invention relates to improvements in fiber optic illumination devices.
従来のこの種装置は第１図または第２図に示す
ように構成されていた。即ち第１図は単芯の場合
を示すもので１は光源、２は一端が上記光源に結
合される光フアイバで、光源１からの光は光源と
光フアイバとの間に設けられたレンズまたはパラ
ボラ反射鏡等（図示せず）により分散させないよ
うにして一端Ａに注入される。３は光フアイバの
他端Ｂから照射される光である。 Conventional devices of this type have been constructed as shown in FIG. 1 or 2. That is, FIG. 1 shows the case of a single core, where 1 is a light source, 2 is an optical fiber whose one end is coupled to the light source, and the light from the light source 1 is transmitted through a lens or a lens provided between the light source and the optical fiber. It is injected into one end A while being prevented from being dispersed by a parabolic reflector or the like (not shown). 3 is light emitted from the other end B of the optical fiber.
第２図は多芯の場合を示すもので、第１図に示
す単芯のフアイバを多数集合して多芯の光フアイ
バ２を構成している。 FIG. 2 shows a multi-core optical fiber 2, in which a large number of single-core fibers shown in FIG. 1 are assembled to form a multi-core optical fiber 2.
光源１は多芯の光フアイバに対応させて設けら
れ、レンズ等介して光フアイバに光電力を注入す
る点は第１図の場合と同様である。３は多数の光
フアイバのそれぞれの端部から照射される光であ
る。従来の光フアイバ照光装置は以上のように構
成されているため光フアイバの他端Ｂから効率的
に照射することが出来るが、光の照射点がＢ端の
一点のみであるため照射範囲が狭いという欠点が
あつた。 The light source 1 is provided corresponding to a multi-core optical fiber, and the point that optical power is injected into the optical fiber through a lens or the like is the same as in the case of FIG. 1. 3 is light emitted from each end of a large number of optical fibers. Since the conventional optical fiber illumination device is configured as described above, it is possible to efficiently irradiate light from the other end B of the optical fiber, but the irradiation range is narrow because the light irradiation point is only one point at the B end. There was a drawback.
この欠点を除去するための一方策として光フア
イバの端部以外の部分から光を漏洩させることに
より、光フアイバの延長方向に線状に光を照射す
ることが考えられている。 As one measure to eliminate this drawback, it has been considered to irradiate light linearly in the extending direction of the optical fiber by leaking light from parts other than the ends of the optical fiber.
以下、この方式について説明する。 This method will be explained below.
第３図において、１は光源で光フアイバの両端
に結合するため２個設けられる。２は光フアイバ
で、周知のように中心部を構成するコア（図示せ
ず）と、その表面を覆うクラツド層（図示せず）
とから構成されている。４は光フアイバのクラツ
ド層に形成された傷で、それぞれの深部は光フア
イバ中心部のコアにまで達している。５は上記傷
から外部に照射される光である。 In FIG. 3, reference numeral 1 denotes a light source, and two light sources are provided for coupling to both ends of the optical fiber. 2 is an optical fiber, which, as is well known, has a core (not shown) that forms the center and a cladding layer (not shown) that covers the surface of the core.
It is composed of. 4 are scratches formed in the cladding layer of the optical fiber, each of which reaches deep to the central core of the optical fiber. 5 is light emitted from the scratch to the outside.
なお上記の傷４は光フアイバの表面に多数形成
されるがこの傷の密度は、光フアイバの延長方向
に対して一定となるようにされている。 Although many scratches 4 are formed on the surface of the optical fiber, the density of the scratches is kept constant in the direction of extension of the optical fiber.
この場合、光フアイバの両端から注入された光
電力は、光フアイバの中央に向かつてその延長方
向に対しほぼ
Ｘ＝Ce-r
ただし
（Ｘ……光電力 Ｃ……定数
ｒ……光フアイバの端部（光電力注入端）から
の距離）
の関係で低下する。これは光フアイバ中を通過す
る光電力が光フアイバ表面に形成された傷を介し
て一定の割合で外部に漏洩するためである。 In this case, the optical power injected from both ends of the optical fiber will be directed toward the center of the optical fiber and will be approximately (distance from the end (optical power injection end)). This is because the optical power passing through the optical fiber leaks to the outside at a constant rate through scratches formed on the surface of the optical fiber.
従つて光フアイバ全体から線状に光を照射する
ことが出来るが、その明るさは光フアイバの中央
に向かうに従つて次第に低下することになる。 Therefore, light can be emitted linearly from the entire optical fiber, but its brightness gradually decreases toward the center of the optical fiber.
この発明はこのような欠点を解消しようとする
もので、光フアイバ表面のクラツド層に、その表
面から光フアイバコアにまで達する傷を多数形成
するという点は第３図に示すものと同様である
が、傷の密度を光フアイバ延長方向に対して不均
一とする点に特徴がある。 This invention aims to eliminate these drawbacks, and is similar to the one shown in Figure 3 in that it forms many scratches on the cladding layer on the surface of the optical fiber, reaching from the surface to the optical fiber core. , is characterized in that the density of scratches is non-uniform in the direction of extension of the optical fiber.
即ち光フアイバの両端から注入された光電力
は、中央部に向うに従つておおむね上記の如き式
に従つて低下するため光フアイバの表面に形成す
る傷の密度を光電力の減衰傾向とは逆に光フアイ
バの中央部に向つて増大させるものである。 In other words, the optical power injected from both ends of the optical fiber decreases toward the center according to the above formula, so the density of scratches formed on the surface of the optical fiber is reversed to the attenuation tendency of the optical power. It increases toward the center of the optical fiber.
第３図において光フアイバの左端から右方寄り
の位置をｒ、光フアイバの照光すべき長さをｌと
するとき
ｒ＝０からｒ＝ｌ／２まではｎ＝１／Ｃｅ−ｒの密度
で
ｒ＝ｌ／２からｒ＝ｌまではｎ＝１／Ｃｅ−（ｌ−ｒ
）の密度で
光フアイバの各位置に傷を形成するものである。 In Figure 3, when the position to the right from the left end of the optical fiber is r, and the length of the optical fiber to be illuminated is l, the density is n = 1/Ce - r from r = 0 to r = l/2. From r=l/2 to r=l, n=1/Ce -(l-r
) to form scratches at each position on the optical fiber.
この傷の密度分布を図に表わすと第４図のよう
になる。以上の構成とすることにより光電力の低
下を傷の密度増で補なうことが出来るため傷を介
して照射される漏洩光電力は光フアイバのいずれ
の位置においてもほぼ一定となり全長にわたつて
同一の明るさとすることが可能である。 The density distribution of these scratches is illustrated in FIG. 4. With the above configuration, the decrease in optical power can be compensated for by the increase in the density of the scratches, so the leakage optical power irradiated through the scratches is almost constant at any position on the optical fiber, over the entire length. It is possible to have the same brightness.
ただし定数Ｃは第３図において両端から注入さ
れた光電力がそれぞれ、光フアイバのl/2点に至
るまでに完全に外部へ漏洩するような値とするこ
とが必要である。 However, the constant C must be set to such a value that the optical power injected from both ends of the optical fiber in FIG. 3 completely leaks to the outside by the time it reaches the l/2 point of the optical fiber.
なお、上記の説明では光源の種類、光フアイバ
の材料、光フアイバの構造については特に触れな
かつたが、光源としては太陽光線、レーザ光線、
半導体発光源、フイラメント方式による電球光源
など、いずれでもよく、光フアイバの材料はガラ
スフアイバ、樹脂フアイバのにいずれにも適用可
能、光フアイバの構造についても、ステツプイン
デツクス型、グレーデツドインデツクス型などい
ずれでもよい。 Note that in the above explanation, the types of light sources, materials of optical fibers, and structures of optical fibers were not particularly mentioned, but light sources include sunlight, laser beams,
Either a semiconductor light source or a filament light bulb light source can be used.The optical fiber material can be glass fiber or resin fiber.The optical fiber structure can also be a step index type or a graded index type. Any type is fine.
また、傷の形状についても特に限定されるもの
ではなく、リング状の傷、スパイラル状の傷、ピ
ンホール状の傷、その他適宜の形状の傷などいず
れでもよい。 Further, the shape of the scratches is not particularly limited, and may be any one of ring-shaped scratches, spiral-shaped scratches, pinhole-shaped scratches, and other suitable shapes.
この発明は以上のように構成され、両端が光源
に結合される光フアイバのクラツド層に、その表
面からコアにまで達する傷を形成し、かつその傷
の密度を光フアイバの延長方向に対して不均一と
したため光源から注入された光を光フアイバの延
長方向に対して線状に一定の明るさで照射するこ
とが出来るものである。 The present invention is constructed as described above, and forms scratches extending from the surface to the core in the cladding layer of an optical fiber whose both ends are connected to a light source, and the density of the scratches is adjusted in the direction of extension of the optical fiber. Since it is non-uniform, the light injected from the light source can be irradiated linearly with constant brightness in the extending direction of the optical fiber.
第１図および第２図は従来の装置を示す概略
図、第３図は表面に傷を形成した光フアイバの概
略図、第４図はこの発明の特徴とする傷の密度と
位置の関係を示す図である。
図中、１は光源、２は光フアイバ、４は傷、５
は照射光である。なお図中、同一符号は同一また
は相当部分を示す。
Figures 1 and 2 are schematic diagrams showing a conventional device, Figure 3 is a schematic diagram of an optical fiber with scratches formed on its surface, and Figure 4 shows the relationship between the density and position of scratches, which is a feature of this invention. FIG. In the figure, 1 is the light source, 2 is the optical fiber, 4 is the scratch, and 5
is the irradiation light. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
ド層に、その表面から光フアイバコアにまで達す
る傷を形成し、この傷から光を漏洩させることに
より光フアイバの線径方向に光電力を照射するよ
うにしたものにおいて、傷の密度をｎ、光フアイ
バの延長方向の位置をｒ、光フアイバの照光すべ
き長さをｌ、定数をＣとした時、 ｒ＝０からｒ＝ｌ／２まではｎ＝１／Ｃｅ−ｒの密度
で ｒ＝ｌ／２からｒ＝ｌまではｎ＝１／Ｃｅ−（ｌ−ｒ
）の密度で 光フアイバの各位置に傷を形成することを特徴と
する光フアイバ照光装置。[Claims] 1. A flaw is formed in the cladding layer of an optical fiber whose both ends are connected to a light source, reaching from the surface to the optical fiber core, and light is leaked from the flaw in the radial direction of the optical fiber. In a device designed to irradiate optical power, when the density of scratches is n, the position in the extension direction of the optical fiber is r, the length of the optical fiber to be illuminated is l, and the constant is C, r = 0 to r From r=l/2 to r=l, n=1/Ce -(l-r
1. An optical fiber illumination device characterized in that scratches are formed at each position of an optical fiber at a density of ) .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10662981A JPS587603A (en) | 1981-07-07 | 1981-07-07 | Illuminating device for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10662981A JPS587603A (en) | 1981-07-07 | 1981-07-07 | Illuminating device for optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS587603A JPS587603A (en) | 1983-01-17 |
| JPS6124684B2 true JPS6124684B2 (en) | 1986-06-12 |
Family
ID=14438399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10662981A Granted JPS587603A (en) | 1981-07-07 | 1981-07-07 | Illuminating device for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS587603A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01252807A (en) * | 1988-03-31 | 1989-10-09 | Hitachi Zosen Corp | Combustion method for radiant gas burner |
| JP2024007712A (en) * | 2022-07-06 | 2024-01-19 | トヨタ紡織株式会社 | Woven fabrics and vehicle interior materials |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2728397B2 (en) * | 1987-01-07 | 1998-03-18 | 株式会社日立製作所 | Liquid crystal display |
| AU6854196A (en) * | 1995-09-01 | 1997-03-27 | Fiberstars, Inc. | Lighting apparatus and method |
| WO1997014914A1 (en) * | 1995-10-20 | 1997-04-24 | Minnesota Mining And Manufacturing Company | Uniform direction dependent line light source |
| US5692822A (en) * | 1995-11-29 | 1997-12-02 | Minnesota Mining & Manufacturing Co. | Uniform bi-directional dependent line light source via controlled partial reflection |
| US6301418B1 (en) | 1997-10-24 | 2001-10-09 | 3M Innovative Properties Company | Optical waveguide with diffuse light extraction |
| US6863428B2 (en) | 1997-10-24 | 2005-03-08 | 3M Innovative Properties Company | Light guide illumination device appearing uniform in brightness along its length |
| US6123442A (en) * | 1997-10-24 | 2000-09-26 | Minnesota Mining And Manufacturing Company | Articles with diffuse reflection of light from light fibers |
| US6050715A (en) * | 1998-01-13 | 2000-04-18 | Fiberstars, Inc. | Method and apparatus for forming surface lighting |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4967633A (en) * | 1972-10-31 | 1974-07-01 | ||
| JPS4999044A (en) * | 1973-01-29 | 1974-09-19 |
-
1981
- 1981-07-07 JP JP10662981A patent/JPS587603A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01252807A (en) * | 1988-03-31 | 1989-10-09 | Hitachi Zosen Corp | Combustion method for radiant gas burner |
| JP2024007712A (en) * | 2022-07-06 | 2024-01-19 | トヨタ紡織株式会社 | Woven fabrics and vehicle interior materials |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS587603A (en) | 1983-01-17 |
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