JPH0720351A - Lens and optical fiber terminal unit - Google Patents
Lens and optical fiber terminal unitInfo
- Publication number
- JPH0720351A JPH0720351A JP5162303A JP16230393A JPH0720351A JP H0720351 A JPH0720351 A JP H0720351A JP 5162303 A JP5162303 A JP 5162303A JP 16230393 A JP16230393 A JP 16230393A JP H0720351 A JPH0720351 A JP H0720351A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- light
- lens
- terminal unit
- face
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、レンズ及び光ファイ
バの末端構造に関し、より詳細には、光ファイバ端部に
レンズが装着され、光を光ファイバへ入射および／また
は出射させる光ファイバ端末ユニットに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens and an end structure of an optical fiber, and more particularly, to an optical fiber terminal unit in which a lens is attached to an end portion of the optical fiber to allow light to enter and / or exit the optical fiber. Regarding
【０００２】[0002]
【従来の技術】従来、例えば、センサヘッドなどの光フ
ァイバ末端構造は、ケーブル被覆材を取り除いた光ファ
イバ末端に口金を装着し、光ファイバ端面を所定処理し
たものである。この様な光ファイバ末端では、反対側の
光源から出て光ファイバ内を伝播した光を、光ファイバ
端面から出射し、また、対象物からの反射光若しくは透
過光をこの光ファイバ端面から入射し、光ファイバがこ
の光を伝播する。2. Description of the Related Art Conventionally, for example, an optical fiber terminal structure such as a sensor head is one in which a cap is attached to the optical fiber terminal from which a cable covering material is removed and the optical fiber end surface is subjected to a predetermined treatment. At such an optical fiber end, the light emitted from the light source on the opposite side and propagated in the optical fiber is emitted from the end face of the optical fiber, and the reflected light or the transmitted light from the object is incident from this end face of the optical fiber. , An optical fiber propagates this light.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、光ファ
イバ端面から直接に光を出射したり、また、光ファイバ
端面に直接に光を入射させると、出射光が広がったり、
また、外れた角度の外乱光を受光することがある。これ
に対して、光ファイバ端面に対向して光学素子、例え
ば、円筒状レンズを先端に配置することが、提案されて
いるが、必ずしも良好な指向性を有していない。更に、
この円筒状レンズと光ファイバとの間に、入射光および
／または出射光の断面を調整するピンホール用口金を配
置することも提案されているが、部品点数が増加して製
造コストを高騰し、しかも、レンズとピンホール（開
口）と光ファイバとの間の光学的位置関係が、不安定に
なり品質の信頼性が低下する。However, if the light is directly emitted from the end face of the optical fiber, or if the light is directly incident on the end face of the optical fiber, the emitted light spreads.
Further, ambient light having an off angle may be received. On the other hand, it has been proposed to dispose an optical element, for example, a cylindrical lens at the tip facing the end face of the optical fiber, but it does not necessarily have good directivity. Furthermore,
It is also proposed to dispose a pinhole die for adjusting the cross section of incident light and / or emitted light between the cylindrical lens and the optical fiber, but the number of parts increases and the manufacturing cost rises. Moreover, the optical positional relationship among the lens, the pinhole (aperture), and the optical fiber becomes unstable, and the reliability of quality deteriorates.
【０００４】この発明は、上述の背景に基づきなされた
ものであり、その目的とするところは、良好な指向性を
有し、部品点数が低減して製造コストを下げ、しかも、
光学素子の光学的位置関係を一定化して品質の安定性を
向上するレンズ及び光ファイバ端末ユニットを提供する
ことである。The present invention has been made based on the above-mentioned background, and an object thereof is to have good directivity, reduce the number of parts, and reduce the manufacturing cost.
It is an object of the present invention to provide a lens and an optical fiber terminal unit that stabilize the optical positional relationship of optical elements and improve the stability of quality.
【０００５】[0005]
【課題を解決するための手段】上記課題はこの発明より
解決される。すなわち、この発明によるレンズは、光フ
ァイバ端末ユニットに装着される円筒状レンズであっ
て、一端面に形成されたレンズ面と、少なくとも他端面
を被覆する光分解性硬化樹脂の遮光層と、レンズ面への
平行光により光分解されて形成された開口とを備え、こ
の開口が、入射光および／または出射光の断面を調整す
る絞りとして作用することを特徴とするものである。The above problems can be solved by the present invention. That is, the lens according to the present invention is a cylindrical lens that is mounted on an optical fiber terminal unit, and includes a lens surface formed on one end surface, a light-shielding layer of a photodegradable cured resin that covers at least the other end surface, and a lens. And an opening formed by photolysis by parallel light to the surface, the opening acting as a diaphragm for adjusting the cross section of the incident light and / or the emitted light.
【０００６】また、この発明による光ファイバ端末ユニ
ットは、光ファイバ端部に装着され、光を光ファイバへ
入射および／または出射させる光ファイバ端末ユニット
であって、光が入射および／または出射する先端部に設
けられたレンズと、光ファイバ端部及びレンズを内部に
保持するホルダー部とを備え、このレンズが、円筒状レ
ンズであり、一端面に形成されたレンズ面と、少なくと
も他端面を被覆する光分解性硬化樹脂の遮光層と、レン
ズ面への平行光により光分解されて形成された開口とを
備え、この開口が、入射光および／または出射光の断面
を調整する絞りとして作用することを特徴とするもので
ある。Further, the optical fiber terminal unit according to the present invention is an optical fiber terminal unit which is attached to an end portion of an optical fiber and makes light enter and / or emit light from the optical fiber, and a tip at which light enters and / or exits. A lens provided on the end portion and a holder portion for holding the optical fiber end portion and the lens inside, and the lens is a cylindrical lens, and the lens surface formed on one end surface and at least the other end surface are covered. A light-blocking layer of a photo-decomposable cured resin and an opening formed by being photo-decomposed by parallel light to the lens surface are provided, and this opening acts as a diaphragm for adjusting the cross section of incident light and / or emitted light. It is characterized by that.
【０００７】[0007]
【作用】上記構成を有するこの発明は、以下のように作
用・動作する。この発明の光ファイバ端末ユニットで
は、光ファイバ端部をホルダー部で保持し、ホルダー部
の光ファイバ末端の端面から、この反対側の光源から出
て光ファイバ内を伝播した光が出射する。次いで、光フ
ァイバ端面に対向するレンズの絞り（開口と遮光層とで
形成される）で、この出射光の断面を調整し、ホルダー
部に収納されたレンズで所定の指向性を有する出射光と
して出射する。逆に、対象物からの反射光若しくは透過
光を、レンズで集光し、光ファイバへの入射光の断面を
絞りが調整して、不要な外乱光を取り除く。より指向性
を有する光が入射して光ファイバ内を伝播する。The present invention having the above construction operates and operates as follows. In the optical fiber terminal unit of the present invention, the end portion of the optical fiber is held by the holder portion, and the light emitted from the light source on the opposite side and propagating in the optical fiber is emitted from the end surface of the end portion of the optical fiber of the holder portion. Then, the cross section of the emitted light is adjusted by the diaphragm of the lens (formed by the aperture and the light shielding layer) facing the end face of the optical fiber, and the emitted light having a predetermined directivity is adjusted by the lens housed in the holder. Emit. On the contrary, the reflected light or the transmitted light from the object is condensed by the lens, and the diaphragm adjusts the cross section of the incident light to the optical fiber to remove unnecessary disturbance light. Light having more directivity enters and propagates in the optical fiber.
【０００８】[0008]
【実施例】この発明を以下の実施例により具体的に説明
する。図１に、この発明による一実施例の光ファイバ端
末ユニットの断面図を示す。この態様の光ファイバ端末
ユニットは、光ファイバ５を被覆したままの光ファイバ
コード２の端部に装着され、光を光ファイバへ入射およ
び／または出射させるものであって、光が入射および／
または出射する先端部に設けられた非球面円筒状レンズ
３と、このレンズ３及び光ファイバコード２を収納する
ホルダー部１とからなる。このレンズ３は、一端面に形
成されたレンズ面と、他端面に形成された開口（ピンホ
ール）４とを備え、他端面の開口部分以外に遮光層７が
形成されて、この開口４の部分が、入射光および／また
は出射光の断面を調整する絞りとして作用する。この態
様において、絞りの断面形状や寸法は、用途に応じて適
宜変更することができる。The present invention will be specifically described with reference to the following examples. FIG. 1 shows a sectional view of an optical fiber terminal unit according to an embodiment of the present invention. The optical fiber terminal unit of this aspect is mounted on the end portion of the optical fiber cord 2 with the optical fiber 5 still coated, and makes the light enter and / or emit from the optical fiber.
Alternatively, it is composed of an aspherical cylindrical lens 3 provided at the emitting tip and a holder portion 1 for accommodating the lens 3 and the optical fiber cord 2. The lens 3 has a lens surface formed on one end surface and an opening (pinhole) 4 formed on the other end surface, and a light shielding layer 7 is formed on a portion other than the opening portion of the other end surface. The part acts as a diaphragm for adjusting the cross section of the incident light and / or the outgoing light. In this aspect, the cross-sectional shape and size of the diaphragm can be appropriately changed depending on the application.
【０００９】この態様の光ファイバ端末ユニットにおけ
るレンズ３を、図２に示す。このレンズは、レンズ面と
反対端面に絞り（ピンポール）に相当する開口４を有す
る。開口４は突起は、光分解性硬化性樹脂を塗布し必要
部分に光を照射して開口部分の樹脂を除去して開口４を
形成することができる。開口以外の端面部分及び外周面
は、遮光層により光を遮断する。遮光層は、所定の面に
塗布された黒色樹脂を硬化させて形成することができ
る。The lens 3 in the optical fiber terminal unit of this aspect is shown in FIG. This lens has an opening 4 corresponding to a diaphragm (pin pole) on the end surface opposite to the lens surface. The projections of the opening 4 can be formed by applying a photodegradable curable resin and irradiating light to a necessary portion to remove the resin in the opening portion. The end face portion other than the opening and the outer peripheral surface block light with a light shielding layer. The light shielding layer can be formed by curing a black resin applied on a predetermined surface.
【００１０】図３の断面図に、このレンズ３の製造例の
工程を示す。まず、レンズ３の外周面と基部端面に光分
解性の硬化樹脂、例えば、黒色の硬化樹脂を全面に塗布
する。次いで、レンズ面側から平行光を照射して、端面
の所望位置に焦点を結ばせて、その部分の光分解性樹脂
を分解させる。最後に、分解させた樹脂を除去しその他
の部分の樹脂を確実に硬化させてこの実施例のレンズを
得る。3A and 3B show steps of a manufacturing example of this lens 3. As shown in FIG. First, a photodegradable curable resin, for example, a black curable resin is applied to the entire outer peripheral surface and the base end surface of the lens 3. Then, parallel light is irradiated from the lens surface side to focus on a desired position on the end surface, and the photodegradable resin in that portion is decomposed. Finally, the decomposed resin is removed and the resin of the other parts is surely cured to obtain the lens of this embodiment.
【００１１】この態様の光ファイバ端末ユニット１は、
以下のように動作する。この例の光ファイバ端末ユニッ
トでは、光ファイバコード２の端部をホルダー部１で保
持する。その光ファイバ末端の端面から、この反対側の
光源から出て光ファイバ内を伝播した光が出射する。光
ファイバ５の端面に対向したレンズの開口４と遮光層７
とが絞りの働きをして、この出射光の断面を調整し、非
球面円筒状レンズ３で所定の指向性を有する出射光とし
て出射する。逆に、対象物からの反射光若しくは透過光
を、非球面円筒状レンズ３で集光し、開口４が光ファイ
バ５端面への入射光の断面を調整して、不要な外乱光を
取り除き、光ファイバ内を伝播する。The optical fiber terminal unit 1 of this aspect is
It works as follows. In the optical fiber terminal unit of this example, the end portion of the optical fiber cord 2 is held by the holder portion 1. The light emitted from the light source on the opposite side and propagating in the optical fiber is emitted from the end face at the end of the optical fiber. The lens opening 4 and the light shielding layer 7 facing the end face of the optical fiber 5
And serve as diaphragms to adjust the cross section of the emitted light, and the aspherical cylindrical lens 3 emits the emitted light as emitted light having a predetermined directivity. On the contrary, the reflected light or transmitted light from the object is condensed by the aspherical cylindrical lens 3, and the opening 4 adjusts the cross section of the incident light to the end face of the optical fiber 5 to remove unnecessary disturbance light. Propagate in the optical fiber.
【００１２】[0012]
【発明の効果】この発明のレンズ及び光ファイバ端末ユ
ニットにより、良好な指向性を有し、部品点数が低減し
て製造コストを下げ、しかも、光学素子の光学的位置関
係を一定化して品質の安定性を向上させることができ
る。The lens and the optical fiber terminal unit of the present invention have good directivity, the number of parts is reduced and the manufacturing cost is lowered, and moreover, the optical positional relationship of the optical element is made constant and the quality is improved. The stability can be improved.
【図１】図１は、この発明による一実施例の光ファイバ
端末ユニットの断面図である。FIG. 1 is a sectional view of an optical fiber terminal unit according to an embodiment of the present invention.
【図２】図２は、図１に用いられたこの発明による一実
施例のレンズの断面図である。FIG. 2 is a sectional view of a lens according to an embodiment of the present invention used in FIG.
【図３】図３は、この発明による一実施例のレンズの製
造工程を示す断面図である。FIG. 3 is a cross-sectional view showing the manufacturing process of the lens of one embodiment according to the present invention.
１ ホルダー部 ２ 光ファイバコード ３ 円筒状非球面レンズ ４ 開口 ５ 光ファイバ ７ 遮光層 ８ 光分解性樹脂 1 Holder Part 2 Optical Fiber Code 3 Cylindrical Aspherical Lens 4 Opening 5 Optical Fiber 7 Light Shielding Layer 8 Photodegradable Resin
Claims (2)
筒状レンズであって、 一端面に形成されたレンズ面と、少なくとも他端面を被
覆する光分解性硬化樹脂の遮光層と、レンズ面への平行
光により光分解されて形成された開口とを備え、該開口
が、入射光および／または出射光の断面を調整する絞り
として作用することを特徴とするレンズ。1. A cylindrical lens to be mounted on an optical fiber terminal unit, comprising a lens surface formed on one end surface, a light-shielding layer of a photodegradable cured resin covering at least the other end surface, and a lens surface An aperture formed by photolysis by parallel light, the aperture acting as a diaphragm for adjusting the cross section of the incident light and / or the emitted light.
イバへ入射および／または出射させる光ファイバ端末ユ
ニットであって、 光が入射および／または出射する先端部に設けられたレ
ンズと、光ファイバ端部及びレンズを内部に保持するホ
ルダー部とを備え、 該レンズが、円筒状レンズであり、一端面に形成された
レンズ面と、少なくとも他端面を被覆する光分解性硬化
樹脂の遮光層と、レンズ面への平行光により光分解され
て形成された開口とを備え、該開口が、入射光および／
または出射光の断面を調整する絞りとして作用すること
を特徴とする光ファイバ端末ユニット。2. An optical fiber terminal unit which is attached to an end portion of an optical fiber and which allows light to enter and / or emit light to the optical fiber, wherein a lens is provided at a front end portion where light enters and / or exits; A lens portion that holds the fiber end portion and the lens inside, and the lens is a cylindrical lens, and the light-shielding layer of a photodegradable cured resin that covers at least the lens surface formed on one end surface and the other end surface. And an opening formed by being photolyzed by parallel light to the lens surface.
Alternatively, the optical fiber terminal unit functions as a diaphragm for adjusting the cross section of the emitted light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16230393A JP3571737B2 (en) | 1993-06-30 | 1993-06-30 | Lens and optical fiber terminal unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16230393A JP3571737B2 (en) | 1993-06-30 | 1993-06-30 | Lens and optical fiber terminal unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0720351A true JPH0720351A (en) | 1995-01-24 |
| JP3571737B2 JP3571737B2 (en) | 2004-09-29 |
Family
ID=15751943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16230393A Expired - Lifetime JP3571737B2 (en) | 1993-06-30 | 1993-06-30 | Lens and optical fiber terminal unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3571737B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150083768A (en) | 2014-01-10 | 2015-07-20 | 파나소닉 디바이스 썬크스 주식회사 | Light projection head and optical sensor |
| JPWO2017135303A1 (en) * | 2016-02-02 | 2018-11-22 | コニカミノルタ株式会社 | measuring device |
-
1993
- 1993-06-30 JP JP16230393A patent/JP3571737B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150083768A (en) | 2014-01-10 | 2015-07-20 | 파나소닉 디바이스 썬크스 주식회사 | Light projection head and optical sensor |
| JPWO2017135303A1 (en) * | 2016-02-02 | 2018-11-22 | コニカミノルタ株式会社 | measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3571737B2 (en) | 2004-09-29 |
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