JPH0634813A - Infrared absorption filter - Google Patents
Infrared absorption filterInfo
- Publication number
- JPH0634813A JPH0634813A JP18791492A JP18791492A JPH0634813A JP H0634813 A JPH0634813 A JP H0634813A JP 18791492 A JP18791492 A JP 18791492A JP 18791492 A JP18791492 A JP 18791492A JP H0634813 A JPH0634813 A JP H0634813A
- Authority
- JP
- Japan
- Prior art keywords
- absorption
- infrared absorption
- acetylene
- doping
- absorption filter
- 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
Landscapes
- Optical Filters (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、赤外線の透過量を調節
するための新規な赤外線吸収フィルターに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel infrared absorption filter for adjusting the amount of infrared rays transmitted.
【０００２】[0002]
【従来の技術】近年、電子工業、建築、農業等の各種の
産業分野において、フィルタ−による赤外領域の透過光
調節がさかんに行われており、中でも光学読み取り装置
においてその重要性が増加しつつある。このような赤外
線吸収フィルターとしては、例えば、特開昭６１−１３
４７０２号公報に開示されているように、赤外線吸収体
として、特定のナフタレン誘導体が使用されている。2. Description of the Related Art In recent years, in various industrial fields such as electronic industry, construction, and agriculture, transmitted light adjustment in the infrared region has been vigorously performed by a filter, and its importance is increasing in an optical reading device. It's starting. An example of such an infrared absorption filter is, for example, JP-A-61-113.
As disclosed in Japanese Patent No. 4702, a specific naphthalene derivative is used as an infrared absorber.
【０００３】しかしながら、上記赤外線吸収フィルタ−
においては、赤外線吸収体が低分子化合物であるため化
合物の分散性が悪く、従って、その化合物の分散状態に
よってフィルターの赤外線吸収特性が変わる恐れがあ
り、安定した赤外線吸収強度を有するフィルターが得ら
れないという欠点があった。However, the above infrared absorption filter
In the above, since the infrared absorber is a low molecular weight compound, the dispersibility of the compound is poor. Therefore, the infrared absorption characteristics of the filter may change depending on the dispersion state of the compound, and a filter having stable infrared absorption intensity can be obtained. It had the drawback of not having it.
【０００４】しかもフィルターを作製した後では、その
赤外線吸収強度を変えることができないので、例えば、
用途や目的に応じて赤外線吸収強度の異なる種々のフィ
ルターを得たい場合には、フィルターの構成や膜厚を変
えて対応する必要があった。Moreover, since the infrared absorption intensity cannot be changed after the filter is manufactured, for example,
In order to obtain various filters having different infrared absorption intensities depending on the use and purpose, it was necessary to change the filter configuration and the film thickness.
【０００５】[0005]
【発明が解決しょうとする課題】本発明は、上記欠点に
鑑みてなされたものであり、その目的は、赤外線吸収特
性が均一で、しかも、吸収強度を後処理によって容易に
変化させることのできる赤外線吸収フィルターを提供す
ることにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and its object is to have uniform infrared absorption characteristics and to easily change the absorption intensity by post-treatment. It is to provide an infrared absorption filter.
【０００６】[0006]
【課題を解決するための手段】本発明の赤外線吸収フィ
ルターは、化学的あるいは電気化学的にドーピングされ
たアセチレン系高分子の有機層からなる赤外線吸収フィ
ルターにおいて、上記アセチレン系高分子が、下式
（Ｉ）で表される構造を繰り返し単位とするポリ〔（ｏ
ートリメチルゲルミルフェニル）アセチレン〕であるこ
とを特徴とし、そのことにより、上記目的が達成され
る。The infrared absorption filter of the present invention is an infrared absorption filter comprising an organic layer of a chemically or electrochemically doped acetylene polymer, wherein the acetylene polymer is represented by the following formula: A poly [(o having a structure represented by (I) as a repeating unit.
-Trimethylgermylphenyl) acetylene], and thereby the above object is achieved.
【０００７】本発明の詳細につき以下に説明する。本発
明の赤外線吸収フィルターに使用される有機層は、下式
（Ｉ）で表される構造を繰り返し単位とするポリ〔（ｏ
ートリメチルゲルミルフェニル）アセチレン〕を構成成
分とする。Details of the present invention will be described below. The organic layer used for the infrared absorption filter of the present invention has a poly [(o) having a structure represented by the following formula (I) as a repeating unit.
-Trimethylgermylphenyl) acetylene] as a constituent component.
【０００８】[0008]
【化２】 [Chemical 2]
【０００９】上記ポリ〔（ｏートリメチルゲルミルフェ
ニル）アセチレン〕を製造方法は、公知の任意の方法が
採用されてよく、例えば、構成成分であるモノマーを、
「Polymer J .,22(12),1105-1107(1990)」あるいは「J.
Polym.Sci.,Part A,27,4267-4279(1989)」などに記載さ
れている方法が挙げられる。As a method for producing the above poly [(o-trimethylgermylphenyl) acetylene], any known method may be adopted. For example, a monomer as a constituent is
`` Polymer J., 22 (12), 1105-1107 (1990) '' or `` J.
Polym. Sci., Part A, 27, 4267-4279 (1989) ”and the like.
【００１０】上記有機層は、後処理として、化学的方法
や電気化学的方法でドープ（酸化）することにより、赤
外領域に強い吸収をもつ材料となる。The above-mentioned organic layer becomes a material having a strong absorption in the infrared region by being doped (oxidized) by a chemical method or an electrochemical method as a post-treatment.
【００１１】上記ドープ方法としては、従来公知の方法
が使用でき、化学的方法としては、例えば、塩素や沃
素、硝酸、塩化第２鉄など種々の酸化剤を気相もしくは
液相で直接接触させる方法があり、電気化学的方法とし
ては、例えば、過塩素酸リチウムなどをアセトニトリル
等の溶媒に溶解した電解液中で電極酸化させる方法があ
る。尚、ドープ量の調節は酸化剤の濃度、接触時間や電
解時間などを制御することにより可能である。ドープ量
を調節することによって、種々の吸収強度をもつ赤外線
吸収フィルターを作製することができる。As the above-mentioned doping method, a conventionally known method can be used, and as a chemical method, for example, various oxidizing agents such as chlorine, iodine, nitric acid and ferric chloride are directly contacted in a gas phase or a liquid phase. There is a method, and as an electrochemical method, for example, there is a method in which an electrode is oxidized in an electrolytic solution in which lithium perchlorate or the like is dissolved in a solvent such as acetonitrile. The dope amount can be adjusted by controlling the concentration of the oxidizing agent, the contact time, the electrolysis time, and the like. By adjusting the dope amount, infrared absorption filters having various absorption intensities can be produced.
【００１２】上記ポリ〔ｏートリメチルゲルミルフェニ
ル）アセチチレン〕のドープ処理により得られた赤外線
吸収フィルターは、ドーピング種の大きさが非常に小さ
いため、従来の赤外線吸収フィルターに比べて、コーテ
ィングむらや分散むらがなく、非常に均一な赤外線吸収
強度が得られる。The infrared absorption filter obtained by the above-mentioned poly [o-trimethylgermylphenyl) acetylene] is very small in the size of the doping species, so that the coating has less coating unevenness than the conventional infrared absorption filters. There is no dispersion unevenness and a very uniform infrared absorption intensity is obtained.
【００１３】本発明の赤外線吸収フィルターの形態は、
目的に応じて種々変更することができ、例えば、基材に
有機層が積層されていてもよいし、基材間に有機層が挟
み込まれていてもよいが、基材に有機層が積層された形
態が好ましい。The form of the infrared absorption filter of the present invention is as follows:
It can be variously changed according to the purpose. For example, the organic layer may be laminated on the base material, or the organic layer may be sandwiched between the base materials, but the organic layer is laminated on the base material. The preferred form is
【００１４】上記基材としては、目的とする赤外領域に
吸収を持たない透明性の材料が好ましく、このような材
料としては、例えば、ガラスや、アクリル系、ビニル
系、ビニル系、ポリオレフィン系、ポリエステル系、ポ
リアミド系、ポリカーボネ−ト系等のホモポリマー、コ
ポリマー、ポリマーブレンド物などがあげられ、これら
の中から適宜選択して使用すればよい。As the above-mentioned base material, a transparent material which has no absorption in the intended infrared region is preferable, and examples of such a material include glass, acrylic, vinyl, vinyl, and polyolefin materials. , Polyester-based, polyamide-based, polycarbonate-based homopolymers, copolymers, polymer blends, and the like, which may be appropriately selected and used.
【００１５】上記基材に有機層を積層する方法としては
特に限定されるものではないが、前記フェニルアセチレ
ン系高分子混合物もしくはフェニルアセチレン化合物共
重合体をトルエン、クロロホルム、四塩化炭素等の溶媒
に溶解し、得られた溶液を、例えば、スピンコートなど
により基材に塗布して乾燥する方法が好ましいまた、上
記有機層の膜厚は目的に応じて適宜設定すればよく、通
常、５００〜８０００Åが好ましく、より好ましくは１
０００〜６０００Åである。The method for laminating the organic layer on the substrate is not particularly limited, but the phenylacetylene-based polymer mixture or the phenylacetylene compound copolymer may be used in a solvent such as toluene, chloroform or carbon tetrachloride. It is preferable to dissolve and obtain the obtained solution, for example, by applying it to a substrate by spin coating or the like and drying it. Further, the film thickness of the organic layer may be appropriately set according to the purpose, and usually 500 to 8000 Å Is preferable, and more preferably 1
It is 000 to 6000Å.
【００１６】[0016]
【実施例】本発明の実施例につき以下に説明する。EXAMPLES Examples of the present invention will be described below.
【００１７】（実施例１）０．１ｇのポリ〔（ｏートリ
メチルゲルミルフェニル）アセチレン〕を５ｍｌのトル
エンに溶解した後、その溶液をガラス基材上にスピンコ
ート（８００ｒｐｍで１０秒間）した後乾燥し、未ドー
プ状態のフィルターを得た。（有機層膜厚：２０００
Å） この未ドープ状態のフィルターの光線透過率を測定し、
その結果を図１に示した。上記未ドープ状態のフィルタ
ーを、２５℃で濃硝酸の飽和蒸気中に１分間放置し、ド
ープ（酸化）し、赤外線吸収フィルターを得た。得られ
た赤外線吸収フィルターの光線透過率を測定し、その結
果を図２に示した。図１及び図２より、ドープ前後にお
いて、波長１１００ｎｍ付近の光線透過率は７０％から
３５％以下にまで変化した。Example 1 0.1 g of poly [(o-trimethylgermylphenyl) acetylene] was dissolved in 5 ml of toluene, and the solution was spin-coated (800 rpm for 10 seconds) on a glass substrate. It was then dried to obtain an undoped filter. (Organic layer thickness: 2000
Å) Measure the light transmittance of this undoped filter,
The results are shown in Fig. 1. The above undoped filter was left in saturated steam of concentrated nitric acid at 25 ° C. for 1 minute to be doped (oxidized) to obtain an infrared absorption filter. The light transmittance of the obtained infrared absorption filter was measured, and the results are shown in FIG. From FIG. 1 and FIG. 2, the light transmittance around the wavelength of 1100 nm changed from 70% to 35% or less before and after the doping.
【００１８】（実施例２）２０℃で１０％硝酸に１５秒
間浸漬してドープ処理したこと以外は、実施例ｌと同様
にして、赤外線吸収フィルターを得た。得られた赤外線
吸収フィルターの光線透過率を測定し、その結果を図３
に示した。波長１０６０ｎｍにおける光線透過率は６８
％であった。(Example 2) An infrared absorption filter was obtained in the same manner as in Example 1 except that the dope treatment was carried out by immersing in 10% nitric acid at 20 ° C for 15 seconds. The light transmittance of the obtained infrared absorption filter was measured, and the result is shown in FIG.
It was shown to. The light transmittance at a wavelength of 1060 nm is 68.
%Met.
【００１９】（実施例３）２０℃で３０％硝酸に１５秒
間浸漬してドーピング処理したこと以外は、実施例ｌと
同様にして、赤外線吸収フィルターを得た。得られた赤
外線吸収フィルターの光線透過率を測定し、その結果を
図４に示した。波長１３００ｎｍにおける光線透過率は
４０％以下であった。(Example 3) An infrared absorption filter was obtained in the same manner as in Example 1 except that the doping treatment was carried out by immersing in 30% nitric acid at 20 ° C for 15 seconds. The light transmittance of the obtained infrared absorption filter was measured, and the result is shown in FIG. The light transmittance at a wavelength of 1300 nm was 40% or less.
【００２０】（実施例４）２０℃で１０％硝酸に１分間
浸漬してドーピング処理したこと以外は、実施例ｌと同
様にして、赤外線吸収フィルターを得た。得られた赤外
線吸収フィルターの光線透過率を測定し、その結果を図
５に示した。波長１１００ｎｍにおける光線透過率は６
０％以下であった。実施例３と実施例２、４を比較する
と、光線透過率はドーパントの濃度や接触時間によって
制御できることが明らかである。従って、ドーパント濃
度を高くしたり、接触時間を長くすることにより、近赤
外領域における光線透過率を制御することが可能であ
る。(Example 4) An infrared absorption filter was obtained in the same manner as in Example 1 except that the doping treatment was carried out by immersing in 10% nitric acid at 20 ° C for 1 minute. The light transmittance of the obtained infrared absorption filter was measured, and the result is shown in FIG. The light transmittance at a wavelength of 1100 nm is 6
It was 0% or less. Comparing Example 3 with Examples 2 and 4, it is clear that the light transmittance can be controlled by the concentration of the dopant and the contact time. Therefore, it is possible to control the light transmittance in the near infrared region by increasing the dopant concentration or increasing the contact time.
【００２１】[0021]
【発明の効果】本発明の赤外線吸収フィルターは、ポリ
〔ｏートリメチルゲルミルフェニル）アセチチレン〕の
有機層を使用するので、均一な組成の膜の形成が可能と
なり、ドーピング処理により均一な赤外線吸収強度を有
するフィルターを得ることができる。また、有機層の構
成を変えずに酸化ドープ量を変化させることにより、赤
外線吸収強度を調節することができる。Since the infrared absorption filter of the present invention uses the organic layer of poly [o-trimethylgermylphenyl) acetylene], it becomes possible to form a film having a uniform composition, and a uniform infrared absorption is obtained by the doping treatment. A filter having strength can be obtained. Further, the infrared absorption intensity can be adjusted by changing the amount of oxidative doping without changing the structure of the organic layer.
【図１】実施例１の赤外線吸収フィルター（未ドープ状
態）の光線透過率を示すグラフである。FIG. 1 is a graph showing the light transmittance of an infrared absorption filter of Example 1 (undoped state).
【図２】実施例１の赤外線吸収フィルター（ドープ後）
の光線透過率を示すグラフである。FIG. 2 Infrared absorption filter of Example 1 (after doping)
It is a graph which shows the light transmittance of.
【図３】実施例２の赤外線吸収フィルター（ドープ後）
の光線透過率を示すグラフである。FIG. 3 Infrared absorption filter of Example 2 (after doping)
It is a graph which shows the light transmittance of.
【図４】実施例３の赤外線吸収フィルター（ドープ後）
の光線透過率を示すグラフである。FIG. 4 Infrared absorption filter of Example 3 (after doping)
It is a graph which shows the light transmittance of.
【図５】実施例４の赤外線吸収フィルター（ドープ後）
の光線透過率を示すグラフである。FIG. 5: Infrared absorption filter of Example 4 (after doping)
It is a graph which shows the light transmittance of.
Claims (1)
れたアセチレン系高分子の有機層からなる赤外線吸収フ
ィルターにおいて、上記アセチレン系高分子が、下式
（Ｉ）で表される構造を繰り返し単位とするポリ〔（ｏ
ートリメチルゲルミルフェニル）アセチレン〕であるこ
とを特徴とする赤外線吸収フィルター。 【化１】 1. An infrared absorption filter comprising an organic layer of a chemically or electrochemically doped acetylene polymer, wherein the acetylene polymer has a structure represented by the following formula (I) as a repeating unit. Poly [(o
-Trimethylgermylphenyl) acetylene]. [Chemical 1]
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18791492A JPH0634813A (en) | 1992-07-15 | 1992-07-15 | Infrared absorption filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18791492A JPH0634813A (en) | 1992-07-15 | 1992-07-15 | Infrared absorption filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0634813A true JPH0634813A (en) | 1994-02-10 |
Family
ID=16214417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18791492A Pending JPH0634813A (en) | 1992-07-15 | 1992-07-15 | Infrared absorption filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0634813A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1111410A3 (en) * | 1999-12-20 | 2001-12-05 | Toyo Boseki Kabushiki Kaisha | Infrared absorption filter |
| US7977441B2 (en) | 2005-11-25 | 2011-07-12 | National Institute Of Advanced Industrial Science And Technology | Acetylene-based polymer |
-
1992
- 1992-07-15 JP JP18791492A patent/JPH0634813A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1111410A3 (en) * | 1999-12-20 | 2001-12-05 | Toyo Boseki Kabushiki Kaisha | Infrared absorption filter |
| US6542292B2 (en) | 1999-12-20 | 2003-04-01 | Toyo Boseki Kabushiki Kaisha | Infrared absorption filter |
| US7977441B2 (en) | 2005-11-25 | 2011-07-12 | National Institute Of Advanced Industrial Science And Technology | Acetylene-based polymer |
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