JPS61113012A - Lighting optical device for optical fiber - Google Patents
Lighting optical device for optical fiberInfo
- Publication number
- JPS61113012A JPS61113012A JP23438284A JP23438284A JPS61113012A JP S61113012 A JPS61113012 A JP S61113012A JP 23438284 A JP23438284 A JP 23438284A JP 23438284 A JP23438284 A JP 23438284A JP S61113012 A JPS61113012 A JP S61113012A
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- optical fiber
- elliptical mirror
- optical
- circular hole
- 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.)
- Pending
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
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4298—Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】
妓ｔ４Ｉｉ訪
本発明は光ファイバーの照明光学装置に関わるものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical fiber illumination device.
従】Ｕ創術洟Ｊバｙ＋佐」■Ｌ県
このような照明光学においては、楕円鏡を用いてその焦
点の一つに光源ランプの発光部を、他方の焦点に光ファ
イバーの端面を配置する方法は従来から公知である。こ
のような照明系の構成ではランプが楕円鏡と光ファイバ
ーとの間に位置するから、光源から楕円鏡に入射する光
束も、楕円鏡から反射して光ファイバーに入射する光束
もランプの外球や内部のステムなどにより可成り遮ぎら
れてしまう。したがってランプの背後の楕円鏡面は殆ん
ど無効であり、光ファイバーに入射しうる光束は楕円鏡
の周辺部から反射するものにしか過ぎず、集光効率は著
しく小さくなる。] ■L Prefecture In such illumination optics, an elliptical mirror is used, and the light emitting part of the light source lamp is placed at one focus of the mirror, and the end face of the optical fiber is placed at the other focus. The method is conventionally known. In this type of illumination system configuration, the lamp is located between the elliptical mirror and the optical fiber, so both the light flux from the light source that enters the elliptical mirror, and the light flux that is reflected from the elliptical mirror and enters the optical fiber, is located between the outer sphere and the inside of the lamp. It is considerably obstructed by the stem etc. Therefore, the elliptical mirror surface behind the lamp is almost ineffective, and the light beam that can enter the optical fiber is only reflected from the periphery of the elliptical mirror, and the light collection efficiency is significantly reduced.
また光ファイバーの有効入射角、或は開口角が約７０°
と制限されているため、楕円鏡の外径は余り大きくする
ことは出来ない。Also, the effective angle of incidence or aperture angle of the optical fiber is approximately 70°.
Therefore, the outer diameter of the elliptical mirror cannot be made too large.
第２図は従来公知の照明光学装置を示したものである。FIG. 2 shows a conventionally known illumination optical device.
楕円鏡１の焦点ＦＩ水はたとえばキセノンフラッシュの
ようなランプ２の発光部３が設置すしている。一方、他
の焦点Ｆ２には光ファイバー４の端面が位置している。At the focal point FI water of the elliptical mirror 1, a light emitting part 3 of a lamp 2, such as a xenon flash, is installed. On the other hand, the end face of the optical fiber 4 is located at the other focal point F2.
なお、この楕円鏡１の外径は光ファイバー４の開口角に
相当する角０に整合するように決められている。ランプ
２の外部を通り楕円鏡１から直接光ファイバー４に入射
する光束５（Ａ＋ 、Ａ２ 、Ｆ２ 、で図示された部
分）とソロ束６（Ａ：＋ 、Ａｌｌ ＩＦ２ ）は図示
のように極く僅かノＪ゛部分であり、ランプ２外形の影
にあたる楕円鏡１の部分Δ２Ａ］からの反射光はランプ
２に上って遮ぎられてしまう。楕円鏡１の離心率に人き
くしてその凹部を深くすると楕円鏡１の外縁部から光フ
ァイバー・１に入射する光量は幾分増加するが、楕円鏡
１と発光部３の間隔が増し５装置の寸法が入きくなって
しまう。また、碗部の深い楕円鏡１の製作は困難であり
、実用的でない。発光部３か１″、直接光ファイバー４
に入ル１する光束７けその☆体色が微小なためごく小量
にすぎない。The outer diameter of the elliptical mirror 1 is determined to match the angle 0 corresponding to the aperture angle of the optical fiber 4. The light flux 5 (portions indicated by A+, A2, F2) and the solo flux 6 (A:+, All IF2) which pass through the outside of the lamp 2 and directly enter the optical fiber 4 from the elliptical mirror 1 are extremely small as shown in the figure. The reflected light from the portion [Delta]2A of the elliptical mirror 1 which is a small portion and is in the shadow of the outer shape of the lamp 2 rises to the lamp 2 and is blocked. If the concave portion is deepened depending on the eccentricity of the elliptical mirror 1, the amount of light incident on the optical fiber 1 from the outer edge of the elliptical mirror 1 will increase somewhat, but the distance between the elliptical mirror 1 and the light emitting section 3 will increase, and the The dimensions will not fit. Further, it is difficult to manufacture the elliptical mirror 1 with a deep bowl, and it is not practical. Light emitting part 3 or 1", direct optical fiber 4
The amount of light that enters is only a small amount because the color of the body is minute.
−田！寛
本発明の１−１的１：］このような従来例の欠点に排除
し、集光効率が高くかつコンバク１−か構成を有する光
ファイバーの照明光学装置を提供することに、ちる６
実施例の溝１戊−
以１：図面に従って本発明による光フアイバー用照明光
学装置ｌＶの一実施例を説明する。-Ta! 1-1 of the present invention:] An object of the present invention is to eliminate the drawbacks of the conventional example and provide an optical fiber illumination optical device having a high light collection efficiency and a convex structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 1. An embodiment of an optical fiber illumination device 1V according to the present invention will be described with reference to the drawings.
第１図は本発明による照明光装置の−・実施例を示す図
である。なお従来例と同一部分は同一符合で示しである
。楕円鏡１は窪みの深い椀状を呈し、その中央には円形
孔６が設けられている。筐体７に固定されたソケノ１−
８にはランプ２が挿入されているが、ランプ２は楕円鏡
１の背後からこの円形孔６を貝通し、その発光部３が楕
円鏡１の焦点ド１に位置するように設置されている。一
方、筐体７に固定されたボルダ−９には光ファイバー４
が取ｆ」けられていて、その入射端面がもう一つの焦点
Ｆ、にｆ！′／、置している。ランプ２と光ファイバー
４の間の光路１−、にけ、筐体７に固定されたポール１
０によってレンズ枠１１及び集光レンズ１２を光軸１−
に中空固定して設け、発光部３からの光束を光ファイバ
ー４に集光するようになっている。FIG. 1 is a diagram showing an embodiment of an illumination light device according to the present invention. Note that the same parts as in the conventional example are indicated by the same reference numerals. The elliptical mirror 1 has a deep bowl shape, and a circular hole 6 is provided in the center thereof. Sokeno 1- fixed to case 7
A lamp 2 is inserted in 8, and the lamp 2 is passed through this circular hole 6 from behind the elliptical mirror 1, and is installed so that its light emitting part 3 is located at the focal point 1 of the elliptical mirror 1. . On the other hand, an optical fiber 4 is attached to a boulder 9 fixed to the housing 7.
f' is removed, and its entrance end face is at another focal point F, f! '/,It is location. Optical path 1- between lamp 2 and optical fiber 4, pole 1 fixed to housing 7
0, the lens frame 11 and condensing lens 12 are aligned with the optical axis 1-
The light emitting part 3 is fixedly provided in a hollow space, and the light beam from the light emitting part 3 is condensed onto the optical fiber 4.
実施例−の一生刑
発光部３から発した光束］ ３（ＦＩ 、ＡＩ 、Ａ２
で図示された部分）及び光束１４（Ｆ、、Ａ３ ＋Ａ４
）は楕円鏡１て反射して光ファイバー４に入射する。Luminous flux emitted from the life sentence light emitting unit 3 of Example] 3 (FI, AI, A2
) and the luminous flux 14 (F, , A3 + A4
) is reflected by the elliptical mirror 1 and enters the optical fiber 4.
この場合も楕円鏡１の外径は光ファイバー４の開１−１
角に相当する角度Ｏ（θ〜７０°）に整合するように決
められている。発光部３から楕円鏡ｌに入射する光束は
、第２図に示した従来例の光束（ＦＩＡＩＡ２で図示し
た部分）が発光部３より後方に向いているのに対して、
この実施例では発光部３よ１ｊ前方の部分になっている
。この入射光の有効角度（乙Ａ＋ ＦＩ Ａ２）は、従
来例で示した第２図の有効角度（ｌΔ１ＦＩ Ａ２）よ
り遥かに大きい。第１図示の有効角度はいずれも平面上
の角度であるが、実際にはこれらは立体角であるからそ
の差は更に太きい。このようにしてランプ２の陰影部で
ある楕円鏡１の中央部に円形孔６祭設け、発光部３から
前方にある光束を使用し、これを離心率の入きい窪みの
深い楕円鏡１で反射させるから、光束の有効立体角が大
きくなり、ランプ２の外壁や内部の電極柱などにより光
束が遮ざられることは２ノテいなどの利点が生じた。も
し楕円鏡１とランプ２の配置を第１図のようにした場合
には、第２図の点線で示したように、ランプ１２と楕円
鏡１１は［渉し合う。この配置では、両者を遠ざけねば
ならず、したがって、同し離心率の楕円鏡を用いるもの
とすれば焦点間隔トＩＦ２が大きくなり、また楕円鏡の
窪みもその分だけ深くなるが、これては照明系の形状・
１法が大きくなり過ぎる−に実現困難である。第１図の
ような配置により、照明光学系の光軸沿いの寸法が短縮
される。さらに、楕円鏡Ｉの外周が第１図の配置に較べ
て著しく光ファイバー４の側に近ずいたため、光ファイ
バー・１の有効入射角を包含すべき楕円鏡１の外径は可
成り小さくてすむ。In this case as well, the outer diameter of the elliptical mirror 1 is the opening 1-1 of the optical fiber 4.
It is determined to match an angle O (θ to 70°) corresponding to the angle. The light flux that enters the elliptical mirror l from the light emitting unit 3 is directed backward from the light emitting unit 3, whereas the light flux in the conventional example shown in FIG.
In this embodiment, it is a portion in front of the light emitting section 3 1j. This effective angle of incident light (A+FI A2) is much larger than the effective angle (lΔ1FI A2) shown in FIG. 2 in the conventional example. The effective angles shown in the first diagram are all angles on a plane, but in reality these are solid angles, so the difference between them is even greater. In this way, six circular holes are provided in the center of the elliptical mirror 1, which is the shadow part of the lamp 2, and the light beam forward from the light emitting part 3 is used, and it is sent to the elliptical mirror 1, which has a deep recess with a large eccentricity. Since it is reflected, the effective solid angle of the luminous flux becomes large, and the luminous flux is not blocked by the outer wall of the lamp 2 or internal electrode pillars, etc., which has two advantages. If the elliptical mirror 1 and the lamp 2 are arranged as shown in FIG. 1, the lamp 12 and the elliptical mirror 11 will intersect with each other as shown by the dotted line in FIG. In this arrangement, the two must be kept apart. Therefore, if an elliptical mirror with the same eccentricity is used, the focal distance IF2 will be large, and the recess of the elliptical mirror will be correspondingly deeper. Shape of lighting system/
1 method becomes too large, making it difficult to implement. The arrangement as shown in FIG. 1 reduces the dimension of the illumination optical system along the optical axis. Furthermore, since the outer circumference of the elliptical mirror I is significantly closer to the optical fiber 4 than in the arrangement shown in FIG. .
ランプ２と尤ファイバー４の間の光軸周りで光線Ａ２Ｆ
２．Ａ、Ｆ２で囲まれる錐体部分では発光部３からの微
小星の直接光が光ファイバー４に到達するだけで殆んど
無効な領域である。しかし、ランプ２に近い位置では可
成り広いスペースが空いている。この位置に設けた集光
レンズ１０により図示の如く角αを張る光束を光ファイ
バー４に入射させることができ、集光効率はさらに向上
する。Light ray A2F around the optical axis between lamp 2 and fiber 4
2. In the cone portion surrounded by A and F2, the direct light from the microstar from the light emitting part 3 reaches the optical fiber 4, and is almost an ineffective region. However, a fairly large space is available near the lamp 2. The condensing lens 10 provided at this position allows a beam of light extending at an angle α as shown in the figure to be incident on the optical fiber 4, thereby further improving the condensing efficiency.
効−−−４片
このようにして本発明による照明光学装置は、円形？Ｌ
を有する窪みの深い楕円鏡と円形孔に挿入されたランプ
配置とにより、ランプにより遮蔽されない有功光束を著
しく増加さす、さらにランプｎ丁ｊ方に設けた集光Ｉラ
ンプにより光路中央部の光を有効に集光させることがで
きる。したがってこの照明ソロ学系ではＭ≦光効率が従
来公知のものに較ｌ＼て著しく向１．シ、さ１〕）によ
りコンバクＩ・な装置をｔ！ｉｕ Ｏ（Ｌ、うる。本発
明による照明光学系は工業用及び医用の尤ファイバー光
源どして法尻な用途を期待しうるｔ）のである。Effect---4 pieces Thus, the illumination optical device according to the present invention has a circular shape? L
The elliptical mirror with a deep recess and the lamp arrangement inserted into the circular hole significantly increase the effective luminous flux that is not blocked by the lamp.Furthermore, the condensing I lamp installed on the side of the lamp focuses the light in the center of the optical path. Light can be focused effectively. Therefore, in this illumination solo system, M≦light efficiency is significantly higher than that of conventionally known systems. 1) to create a compact device! The illumination optical system according to the present invention can be expected to find many uses, such as fiber light sources for industrial and medical purposes.
９１図面の簡ｔｌｔな説明
第１図は本発明による照明光学装置の一実施例を示す図
である。第２図は従来公知の照明光学装置を示した図で
ある。91 Brief Description of Drawings FIG. 1 is a diagram showing an embodiment of an illumination optical device according to the present invention. FIG. 2 is a diagram showing a conventionally known illumination optical device.
Claims (1)
を配置する如き照明光学系において、中央部に円形孔を
有し、かつ大きな離心率を有する楕円鏡と、この円形孔
を貫通するように設置したランプと、このランプと光フ
ァイバーの間の光軸上に設けた集光レンズと、焦点にそ
の端面を位置せしめた光ファイバーとから成る照明光学
装置。In an illumination optical system in which a light source is placed at the focal point of an elliptical mirror and an end face of an optical fiber is placed at the other focal point, an elliptical mirror having a circular hole in the center and a large eccentricity, and a light source passing through the circular hole are used. An illumination optical device consisting of a lamp installed in a lamp, a condensing lens installed on the optical axis between the lamp and an optical fiber, and an optical fiber whose end face is positioned at the focal point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23438284A JPS61113012A (en) | 1984-11-07 | 1984-11-07 | Lighting optical device for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23438284A JPS61113012A (en) | 1984-11-07 | 1984-11-07 | Lighting optical device for optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61113012A true JPS61113012A (en) | 1986-05-30 |
Family
ID=16970122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23438284A Pending JPS61113012A (en) | 1984-11-07 | 1984-11-07 | Lighting optical device for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61113012A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63230276A (en) * | 1987-03-17 | 1988-09-26 | インダストリアル・テクノロジ−・リサ−チ・インステイテユ−ト | Method and device for tracing welding seam by artificial visual sense of welding robot |
| JPS63249811A (en) * | 1987-04-06 | 1988-10-17 | Olympus Optical Co Ltd | Illuminating optical device |
| FR2718825A1 (en) * | 1994-04-14 | 1995-10-20 | Orth Francois | High output light source for optical fibre type lighting or decoration system |
| JP2003075690A (en) * | 2001-08-31 | 2003-03-12 | Matsushita Electric Works Ltd | Transmitter and receiver |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56119111A (en) * | 1980-02-23 | 1981-09-18 | Ricoh Co Ltd | Collimator |
-
1984
- 1984-11-07 JP JP23438284A patent/JPS61113012A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56119111A (en) * | 1980-02-23 | 1981-09-18 | Ricoh Co Ltd | Collimator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63230276A (en) * | 1987-03-17 | 1988-09-26 | インダストリアル・テクノロジ−・リサ−チ・インステイテユ−ト | Method and device for tracing welding seam by artificial visual sense of welding robot |
| JPS63249811A (en) * | 1987-04-06 | 1988-10-17 | Olympus Optical Co Ltd | Illuminating optical device |
| FR2718825A1 (en) * | 1994-04-14 | 1995-10-20 | Orth Francois | High output light source for optical fibre type lighting or decoration system |
| JP2003075690A (en) * | 2001-08-31 | 2003-03-12 | Matsushita Electric Works Ltd | Transmitter and receiver |
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