JPS60153001A - Optical fiber for infrared rays - Google Patents
Optical fiber for infrared raysInfo
- Publication number
- JPS60153001A JPS60153001A JP59008708A JP870884A JPS60153001A JP S60153001 A JPS60153001 A JP S60153001A JP 59008708 A JP59008708 A JP 59008708A JP 870884 A JP870884 A JP 870884A JP S60153001 A JPS60153001 A JP S60153001A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- fiber
- infrared
- wavelengths
- infrared rays
- 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
- 239000013307 optical fiber Substances 0.000 title claims abstract description 23
- LYQFWZFBNBDLEO-UHFFFAOYSA-M caesium bromide Chemical compound [Br-].[Cs+] LYQFWZFBNBDLEO-UHFFFAOYSA-M 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims abstract description 6
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 claims abstract description 3
- 239000000654 additive Substances 0.000 claims abstract 2
- 230000000996 additive effect Effects 0.000 claims abstract 2
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 150000002823 nitrates Chemical class 0.000 claims 1
- 150000003016 phosphoric acids Chemical class 0.000 claims 1
- 150000004760 silicates Chemical class 0.000 claims 1
- 239000000835 fiber Substances 0.000 abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 abstract description 9
- 229910052681 coesite Inorganic materials 0.000 abstract description 6
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 6
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 6
- 229910052682 stishovite Inorganic materials 0.000 abstract description 6
- 229910052905 tridymite Inorganic materials 0.000 abstract description 6
- -1 AsCl Chemical compound 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000377 silicon dioxide Substances 0.000 abstract description 4
- PGAPATLGJSQQBU-UHFFFAOYSA-M thallium(i) bromide Chemical compound [Tl]Br PGAPATLGJSQQBU-UHFFFAOYSA-M 0.000 abstract description 3
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 abstract 4
- 235000010288 sodium nitrite Nutrition 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 1
- 239000007858 starting material Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- 230000003595 spectral effect Effects 0.000 description 5
- 238000005498 polishing Methods 0.000 description 3
- 238000000304 warm extrusion Methods 0.000 description 3
- 230000005457 Black-body radiation Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004868 gas analysis Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 244000124853 Perilla frutescens Species 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WPYVAWXEWQSOGY-UHFFFAOYSA-N indium antimonide Chemical compound [Sb]#[In] WPYVAWXEWQSOGY-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/102—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type for infrared and ultraviolet radiation
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、非接触低温測定、ガス分析、プラスチックの
膜厚測定などに用いられる赤外線計測用の光ファイバに
関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical fiber for infrared measurement used in non-contact low temperature measurement, gas analysis, plastic film thickness measurement, and the like.
従来例の構成とその問題点
最近、赤外線を使った計測分野の進展は、めざましいも
のがある。それに伴ない、赤外線を透すファイバの開発
も活発に行なわれている。赤外線の中でも近赤外域であ
る２μｍ付近までは、石英ファイバが使用できることか
ら、２００°Ｃ以上の高温測定用ファイバとして用いら
れている。Conventional configuration and its problems Recently, there has been remarkable progress in the field of measurement using infrared rays. Along with this trend, development of fibers that transmit infrared rays is also actively underway. Since quartz fibers can be used in the near-infrared region of infrared light up to around 2 μm, they are used as fibers for high-temperature measurements of 200° C. or higher.
すなわち、非接触式温度計としては、２００’Ｃ以下の
低い温度は、６μｍ以上の波長を透すファイバが必要で
あり、第１図の黒体放射温度曲線よシこの必要性が判る
。That is, for a non-contact type thermometer, a fiber that transmits wavelengths of 6 μm or more is required for low temperatures of 200'C or less, and the necessity of this can be seen from the blackbody radiation temperature curve in FIG.
これらの赤外用光ファイバに要求されることは、５μｍ
以上の波長を良く透すことである。現在、主に開発され
ている長波長伝送可能なファイバ材料を第１表に示す。What is required for these infrared optical fibers is 5 μm
This means that wavelengths of the above wavelengths can be passed through well. Table 1 shows the currently developed fiber materials capable of transmitting long wavelengths.
以下余白
これらの材料は、ファインく化することにより、かなり
の長波長域の光を伝送することができる。By making these materials finer, they can transmit light in a fairly long wavelength range.
しかし、実際に低温温度測定する場合において、室温以
下の温度を測定すると、ファイン（自体の温度の上昇か
ら出る赤外線が伝送されることにより、ファイバ自体の
温度以下の測定物体から発せられる赤外線波長は長いだ
め、測定される信号は雑信号に消されてしまうことにな
る。このような問題を解決するために、２色部度謂とか
、フィルターを入れた構造のものが考えられているが、
構成」−複雑になシ、また、高精度なものが得られてい
ないＯ
発明の目的
本発明は、赤外用光ファイ・２において、特定の赤外吸
収をもつ化合物元素を添加することにより、バンドパス
フィルター機能を有する赤外用光ファイバを提供するこ
とを目的とする。However, when actually measuring low-temperature temperatures, when measuring a temperature below room temperature, fine (infrared rays emitted from the temperature of the fiber itself increase) are transmitted, and the infrared wavelength emitted from the measuring object at a temperature below the temperature of the fiber itself is If the length is too long, the measured signal will be erased by noise signals.To solve this problem, two-color filters or structures with filters are being considered.
Object of the Invention The present invention provides an infrared optical fiber 2 in which a compound element having a specific infrared absorption is added. The purpose of the present invention is to provide an infrared optical fiber having a bandpass filter function.
発明の構成
赤外用光ファイバの短波長領域の赤外線を通さないファ
イバにすれば、高温側の範囲は限定烙れ低温から発せら
れる長波長の光のみを伝送することのできる元ファイバ
となシ、室温以下の低温の温度測定が可能になる。Structure of the Invention If the infrared optical fiber is made of a fiber that does not transmit infrared rays in the short wavelength region, the high temperature range will be limited, and the original fiber will be able to transmit only the long wavelength light emitted from the low temperature. It becomes possible to measure temperatures at low temperatures below room temperature.
すなわち、本来、６μｍ以上で、良好な透過率を示す赤
外用光ファイバに特定の吸収をもつ化合物を添加するこ
とによシ、必要な波長域のみを伝送し、それ以外の波長
はファイバ自身で吸収し、伝送しない機能を有するファ
イバである。In other words, by adding a compound with a specific absorption to an infrared optical fiber that originally shows good transmittance at wavelengths of 6 μm or more, it can transmit only the necessary wavelength range, and the other wavelengths can be transmitted by the fiber itself. It is a fiber that has the function of absorbing and not transmitting.
実施例の説明
赤外用光ファイバの製法について述べる。第１表よシ、
ＫＢｒはヘキ開性を有しておシ、温間押出し法を用いて
ファイバ化することにより、多結晶状態のファイバがで
きるが、これは比較的、機械的強度が弱い。ＣｓＢｒ
、ＡｑＣｎ 、 ＴＩｌ、Ｂｒ 、 ＫＨ２−６は、ヘ
キ開性がなく、ファイバ化は、温間押出し法を用いて作
ることができる。ファイバの結晶形は多結晶であるが強
度は大きい０また別の製法として、キャピラリーなどを
用いて溶融結晶成長させ、単結晶ファイバにする作法も
行なわれる。Description of Examples A method for manufacturing an infrared optical fiber will be described. Table 1,
KBr has cleavage properties and can be made into a fiber by warm extrusion to produce a polycrystalline fiber, but this fiber has relatively low mechanical strength. CsBr
, AqCn, TIl, Br, KH2-6 are non-cleavable and can be made into fibers using warm extrusion. The crystal form of the fiber is polycrystalline, but its strength is high.Another manufacturing method is to use a capillary or the like to grow a melted crystal to form a single crystal fiber.
第２図に、ＫＨ２−６の７フイノ＜）２〜２２１１ｍの
波長域の分光透過率を示しているが、４〜２２μｍまで
の波長に対する透過率は７シソ！・であり、分光透過特
性の優れた赤外用光ファイバである。Figure 2 shows the spectral transmittance of KH2-6 in the wavelength range of 7 fino<)2 to 2211 m, and the transmittance for wavelengths of 4 to 22 μm is 7 shiso!・It is an infrared optical fiber with excellent spectral transmission characteristics.
このような特性を示すＫＨ２−ｅ；ファイバの原材料に
ＳｉＯ２もしくはＳ １０２・Ｈ２Ｏのようなケイ酸化
物を、数重量％添加すること（でより、第３図のような
分光透過率を示す赤外用ファイバが得られる○
ＫＨ２−５フアイバの製法を詳細に説明する。KH2-e exhibits such characteristics; by adding several weight percent of a silicic oxide such as SiO2 or S102.H2O to the fiber raw material (by adding a few percent by weight of a silicate such as SiO2 or S102.H2O), The manufacturing method of ○ KH2-5 fiber, which can be used as a fiber for external use, will be explained in detail.
Ｔ２Ｂｒと１２Ｉ の原料を１２０°Ｃで充分乾燥する
。Thoroughly dry the T2Br and 12I raw materials at 120°C.
ＴＩｌ、ｆｌｒ４２重量％、Ｔ１１５７重量％に秤量す
る。Weigh TIl, flr 42% by weight, T11 57% by weight.
さらにＳｉｎ２１ｗｔ％を秤量Ｉ−１充分に混合しン後
、横型電気炉で４６０〜４８０°Ｃで溶融し、結晶全体
が同時に固まるように、１時間１Ｑ″Ｃ’−Ｆ’げるこ
とにより、再結晶化する。３００”Ｃ以下では、自然冷
却で良い。以上のような方法で作られた結晶を温間加圧
押出装置のダイスに入るように適当な寸法に成形し、押
出し温度を２００〜２７０°Ｃに設定し、７〜１０ ｔ
ｏｎ／Ｃｍの加圧をすることにより数ｃｍ／分のスピー
ドで押出し、ファイバ化した。Furthermore, after sufficiently mixing 21 wt% of Sin in a weighed amount I-1, melting it at 460 to 480 °C in a horizontal electric furnace and heating it for 1 hour 1Q''C'-F' so that the entire crystal solidifies at the same time. Recrystallize. At temperatures below 300"C, natural cooling is sufficient. The crystals produced by the above method were formed into appropriate dimensions so as to fit into the die of a warm pressure extrusion device, the extrusion temperature was set at 200-270°C, and the crystals were heated at 7-10 t.
It was extruded at a speed of several cm/min by applying a pressure of on/cm to form a fiber.
以上のように押出したファイバの端面は、多結晶状態に
なっているため、研磨が必要である０最初Ｋ ＃ ２，
０００ ｔｙ）サントヘーノ＜−と７ルコール磨き、仕
上げを＄８，０００で磨くことにより、きれいな端面を
作る。The end face of the fiber extruded as described above is in a polycrystalline state and requires polishing.
000 ty) Santojeno <- and 7 alcohol polishing, and finish by polishing for $8,000 to create a clean end surface.
次に、第４図に示すようにＮ ａ Ｎｏ ２のような硝
酸化物を、数束量％添加することにより、１０〜１６μ
ｍを透すような、赤外用光ファイノくを作ることができ
る。Next, as shown in Fig. 4, by adding a few percent of nitrate such as NaNo2,
It is possible to create an infrared optical fiber that can pass through m.
さらに、第５図に示すＮ ａ Ｐ Ｏ４のような、リン
酸化合物を数束量％添加することによシ、６〜９μｍを
透過する赤外用光ファイバを製作することができる。Furthermore, by adding a few percent of a phosphoric acid compound such as N a P O 4 shown in FIG. 5, an infrared optical fiber that transmits wavelengths of 6 to 9 μm can be manufactured.
このようにバンドパスフィルター機能を有スる赤外用光
７フイバは、ＣｓＢｒ，ＴＩＢｒ，ＡｇＢｒ。The seven infrared fibers that have a bandpass filter function are CsBr, TIBr, and AgBr.
ＡｑＣｆｌのような温間押出しで製作できる材料には、
同様な方法で製作することができる。Materials that can be produced by warm extrusion, such as AqCfl, include:
It can be manufactured in a similar manner.
第６図にバンドパスフィルター機能を有する赤外用光フ
ァイバを用いた放射温度計の概念図を示゛す。１は測定
する物体であり、２は・（ンドノ（スフイルター（Ｎａ
ＮＯ２添加）赤外用光ファイバ、３は赤外センサー（Ｈ
ｇＣｄＴｅ，熱電対，ＩｎＳｂなど）、４は制御回路と
温度表示計である。FIG. 6 shows a conceptual diagram of a radiation thermometer using an infrared optical fiber having a bandpass filter function. 1 is the object to be measured, 2 is the object to be measured, and 2 is the
NO2 addition) infrared optical fiber, 3 is an infrared sensor (H
gCdTe, thermocouple, InSb, etc.), 4 is a control circuit and a temperature display meter.
このような測定系を使うことにより、今まで、室温以下
の温度を非接触な方法で、しかも、視界が直線上にない
部分の温度を正確に測定することが可能になった。By using such a measurement system, it has now become possible to accurately measure temperatures below room temperature in a non-contact manner and in areas where the field of vision is not in a straight line.
また、第６図に示すようなＮ ａ Ｐ Ｏ ４を添加し
た赤外ファイバは、４〜９μｍを通すことにより、ガス
分析用ファイバとして有用である。Further, an infrared fiber doped with NaP O 4 as shown in FIG. 6 is useful as a fiber for gas analysis by allowing the fiber to pass through the fiber at a wavelength of 4 to 9 μm.
ＣＯＯ２０吸収は４．５μｍ付近にあり、ＣＨ４ガスは
８μ２１ｍ 、 Ｎ２０ガスは８μｍであシ、これらの
特定波長のみの波長を伝送することができるため、雑信
号を排除でき、高精度測定が可能となる。COO20 absorption is around 4.5μm, CH4 gas is 8μ21m, and N20 gas is 8μm.Since only these specific wavelengths can be transmitted, noise signals can be eliminated and highly accurate measurements can be made. Become.
また、プラスチックの膜厚測定にも、ノリスチック特有
の吸収スペクトルを使用することから、バンドパスフィ
ルター機能蒙赤外ファイバーは有用である。In addition, band-pass filter-functional Mongolian infrared fibers are also useful for measuring the film thickness of plastics, as the unique absorption spectrum of Noristic is used.
発明の効果
以上のように本発明は、特定の赤外吸収をもつ化合物元
素を赤外用光ファイバに添加することにより、バンドパ
スフィルター機能を有したファイバが得られ、低温温度
測定をする場合でも雑音信号をなくして高精度な測定が
行なえる。Effects of the Invention As described above, in the present invention, by adding a compound element having a specific infrared absorption to an infrared optical fiber, a fiber having a bandpass filter function can be obtained, which can be used even when measuring low temperature. Highly accurate measurements can be performed by eliminating noise signals.
第１図は物体の黒体放射強度曲線を示す特性図、第２図
はＫＲＳ−５フアイバの分光透過率を示す特性図、第３
図，第４図，第５図は本発明の各実施例における赤外用
光ファイバの分光透過率を示す特性図、第６図は非接触
型温度計の概念図である。
１・・・・・・被測定物体、２・・・・・・赤外用光フ
ァイバ、３・・・・・・赤外センサー、４・・・・・・
回路系と表示計。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
う良長 しμｍ） （入）
第２図
う支 丑 （μｍ）
第３図
う！ｌ イ％ ＜、μｒ１ノ
第４図
破 丑 （μ飢９Figure 1 is a characteristic diagram showing the blackbody radiation intensity curve of an object, Figure 2 is a characteristic diagram showing the spectral transmittance of KRS-5 fiber, and Figure 3 is a characteristic diagram showing the spectral transmittance of the KRS-5 fiber.
4 and 5 are characteristic diagrams showing the spectral transmittance of the infrared optical fiber in each embodiment of the present invention, and FIG. 6 is a conceptual diagram of a non-contact type thermometer. 1...Object to be measured, 2...Infrared optical fiber, 3...Infrared sensor, 4...
Circuit system and display meter. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
(μm) Figure 2 (μm) Figure 3 (μm) Figure 3! l % <,μr1のFigure 4 Break ox (μstarvation 9
Claims (2)
材料からなることを特徴とする赤外用光ファイバ０(1) An infrared optical fiber characterized by being made of a material to which a compound element with specific infrared absorption is added.
用い、添加物として、ケイ酸化物、硝酸化物、リン酸化
合物のうちの少なくとも１つの化合物を用いることを特
徴とする特許請求の範囲第１項記載の赤外用光ファイバ
。(2) CsBr as the main phase material of the infrared optical fiber. Claim 1, characterized in that 'R8-5 is used in AqCQ, AgBr, TnBr, and at least one compound selected from silicates, nitrates, and phosphoric acid compounds is used as an additive. infrared optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59008708A JPS60153001A (en) | 1984-01-20 | 1984-01-20 | Optical fiber for infrared rays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59008708A JPS60153001A (en) | 1984-01-20 | 1984-01-20 | Optical fiber for infrared rays |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60153001A true JPS60153001A (en) | 1985-08-12 |
Family
ID=11700436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59008708A Pending JPS60153001A (en) | 1984-01-20 | 1984-01-20 | Optical fiber for infrared rays |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60153001A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5474732A (en) * | 1977-11-28 | 1979-06-15 | Konishiroku Photo Ind Co Ltd | Motor built-in camera |
| JPS58187080A (en) * | 1982-04-26 | 1983-11-01 | Canon Inc | Video system |
-
1984
- 1984-01-20 JP JP59008708A patent/JPS60153001A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5474732A (en) * | 1977-11-28 | 1979-06-15 | Konishiroku Photo Ind Co Ltd | Motor built-in camera |
| JPS58187080A (en) * | 1982-04-26 | 1983-11-01 | Canon Inc | Video system |
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