JPH03137037A - Near-infrared cut-off filter glass - Google Patents
Near-infrared cut-off filter glassInfo
- Publication number
- JPH03137037A JPH03137037A JP27224589A JP27224589A JPH03137037A JP H03137037 A JPH03137037 A JP H03137037A JP 27224589 A JP27224589 A JP 27224589A JP 27224589 A JP27224589 A JP 27224589A JP H03137037 A JPH03137037 A JP H03137037A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- infrared cut
- filter
- filter glass
- infrared
- 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
- 239000011521 glass Substances 0.000 title claims abstract description 26
- 239000000203 mixture Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 7
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 abstract description 2
- 239000005365 phosphate glass Substances 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 2
- 229910052593 corundum Inorganic materials 0.000 abstract 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 2
- 239000003086 colorant Substances 0.000 abstract 1
- 238000002834 transmittance Methods 0.000 description 12
- 230000007423 decrease Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004031 devitrification Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
- C03C4/082—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths for infrared absorbing glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/12—Silica-free oxide glass compositions
- C03C3/16—Silica-free oxide glass compositions containing phosphorus
- C03C3/17—Silica-free oxide glass compositions containing phosphorus containing aluminium or beryllium
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はカラーテレビカメラ色調整用フィルターに使用
される近赤外カットフィルターガラスで、特に４００〜
６００ｎｍの可視域の透過率が良（６００〜７００ｎｍ
に於る吸収が鋭い近赤外吸収フィルターに関するもので
ある。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a near-infrared cut filter glass used in color adjustment filters for color television cameras, and particularly
Good transmittance in the visible range of 600 nm (600-700 nm
This relates to a near-infrared absorption filter that has sharp absorption in .
（従来の技術）
色補正フィルターとして近赤外波長を選択的に吸収する
様に、燐酸ガラスにＣｕＯを添加したフィルターガラス
が使用されている。近赤外遮断効果を増大させるためＣ
ｕＯの含量を増加させると、一般に４００〜５００ｎｍ
の透過性が低下してガラスが緑色味を帯び、更に６００
〜７００ｎａ＋の吸収特性が劣化する。(Prior Art) A filter glass in which CuO is added to phosphoric acid glass is used as a color correction filter so as to selectively absorb near-infrared wavelengths. C to increase the near-infrared blocking effect
Increasing the content of uO generally leads to 400-500 nm
The transparency of the glass decreases and the glass takes on a greenish tinge.
The absorption properties of ~700na+ deteriorate.
（発明が解決しようとする問題点）
近赤外カットフィルターガラスはＣｕＯ成分を増加する
だけでは、近赤外カット特性の向上に対し効果は無い。(Problems to be Solved by the Invention) Merely increasing the CuO component of near-infrared cut filter glass has no effect on improving near-infrared cut characteristics.
本発明は上記問題解決のためなされたもので４００〜６
００ｎａ＋の透過率を良くし、７００ｒ＋＋ｏｌこ於る
吸収性能を良好にした近赤外吸収ガラスの提供が目的で
ある。The present invention was made to solve the above problem.
The object of the present invention is to provide a near-infrared absorbing glass that has good transmittance at 00na+ and good absorption performance at 700r++ol.
（問題点を解決するための手段）
本発明の近赤外カットフィルターガラス組成物は重量百
分率でＰ ｔ Ｏｓ ７０〜７６％、Ａ ｌ ｔｏ ｓ
７〜１２％、Ｂ＊ＯｓＯ〜２％、ＣａＯ＋ＭｇＯ２〜
６％、Ｚｎ０１〜３％、Ｎ ａ ＊Ｏ＋ Ｋ＊０６〜１
２％、ＣｕＯ２〜６％とから成り、４００ｎｍｌこ於て
８１％以上、５００ｎａ＋に於て８４％以上、６００ｎ
ｍ、４４±８％、７００ｎｍに於て３％以下の透過率を
有することを特徴とするものである。（１＋ｎ／ｍ厚さ
）
（作用）
次に本発明のガラス組成を前記範囲に限定した理由を説
明する。(Means for Solving the Problems) The near-infrared cut filter glass composition of the present invention contains 70 to 76% PtOs and Altos in weight percentage.
7-12%, B*OsO~2%, CaO+MgO2~
6%, Zn01~3%, Na*O+K*06~1
2%, CuO2-6%, 81% or more in 400nml, 84% or more in 500na+, 600n
m, 44±8%, and has a transmittance of 3% or less at 700 nm. (1+n/m thickness) (Function) Next, the reason why the glass composition of the present invention is limited to the above range will be explained.
Ｐ＋Ｏ＋は硝子構成主成分であるが７０％以下では４０
０ｎｍ及その近傍の透過率が低下し、７５％以上では溶
融特性が悪く、失透性が増加する。Ａｌｔｏｓは化学的
抵抗性を向上させるため不可欠であるが７％未満では効
果が少＜、１２％を超えると４００ｎｍ附近の透過率が
減少する。Ｂ、０．はガラスの耐久性、溶融性を向上さ
せるが２％を超えるとガラスの安全性を阻害する。Ｃａ
ｂ、ＭｇＯ１及びＺｎＯは化学的耐久性を改善する必須
成分である。之等のアルカリ土類酸化物は溶解性の改善
にも帰与するがＣａ Ｏ＋ Ｍ ｇ Ｏの合量が２％以
下では之等の効果なく６％以上では失透性を増加し、透
過率を低下させる。ＺｎＯは１％以下では上記の効果少
く、３％以上では失透性を増す。Ｎａ２Ｏ＋Ｋ２Ｏは硝
子の溶融性、安定性を増加させ、更に、４００〜６００
ｎｍの透過率を向上させるが、６％以下では効果なく、
１２％を超えると化学的耐久性を著しく劣化させる。Ｃ
ｕＯは近赤外域ンヤーブカットのための必須成分である
が２％以下では近赤外域の吸収十分でなく６％以上では
可視域全体の透過率が低下する。P+O+ is the main component of glass, but if it is less than 70%, it will be 40%
The transmittance at and around 0 nm decreases, and when it exceeds 75%, the melting characteristics are poor and the devitrification increases. Altos is essential for improving chemical resistance, but if it is less than 7%, the effect is small, and if it exceeds 12%, the transmittance around 400 nm decreases. B, 0. Although it improves the durability and meltability of glass, if it exceeds 2%, it impairs the safety of glass. Ca
b. MgO1 and ZnO are essential components that improve chemical durability. Alkaline earth oxides such as these contribute to improving solubility, but when the total amount of Ca O + M g O is less than 2%, there is no such effect, and when it is more than 6%, devitrification increases and the transmittance decreases. decrease. When the ZnO content is 1% or less, the above effect is small, and when it is 3% or more, the devitrification property increases. Na2O + K2O increases the meltability and stability of glass, and also increases the meltability and stability of glass.
Although it improves the transmittance of nm, it is not effective below 6%.
If it exceeds 12%, chemical durability will be significantly deteriorated. C
uO is an essential component for cutting the near-infrared region, but if it is less than 2%, absorption in the near-infrared region is insufficient, and if it is more than 6%, the transmittance in the entire visible region decreases.
（以下余白） （実施例）本発明の実施例を表１に基いて説明する。(Margin below) (Example) Examples of the present invention will be explained based on Table 1.
表 １
（重量％）
所定の酸化物組成が得られる様、調合し、白金坩堝で１
２００〜１４００℃の温度で溶融し、攪拌、清澄後金型
内に鋳込み、充分な徐冷後、切断、研磨、更に１ｍ／ａ
＋厚の板に、積層して得たものである。Table 1 (wt%) Mixed to obtain the specified oxide composition and heated in a platinum crucible at 1.
Melt at a temperature of 200 to 1400℃, stir and clarify, then cast into a mold, and after sufficient slow cooling, cut, polish, and further 1m/a
It is obtained by laminating + + thick plates.
表１の下段に４００．５００．６００．７００ｎｍｌこ
於る分光透過率を示す。表中Ｎαｌ、２は実施例であり
、Ｎα３〜５は比較例を示したものである。The lower part of Table 1 shows the spectral transmittance of 400.500.600.700 nm. In the table, Nαl, 2 is an example, and Nα3 to 5 are comparative examples.
（発明の効果）
上記の如く、本発明は、燐酸塩ガラス中にＣｕＯを添加
した近赤外カット、ガラスに於てアルカリ金属酸化物を
６〜１２％とし、Ａｌｔｏｊを７〜１２％に抑えること
により４００〜５００ｎｍの透過率を高め、６００〜７
００ｎｍの吸収特性を高めることが出来る。(Effects of the Invention) As described above, the present invention is a near-infrared cut glass with CuO added to phosphate glass, which has an alkali metal oxide content of 6 to 12% and suppresses Altoj to 7 to 12%. This increases the transmittance in the 400-500 nm range and increases the transmittance in the 600-7 nm range.
00 nm absorption characteristics can be improved.
図面は本発明ガラス及び従来ガラスの分光透過率を示す
曲線である。
本発明ガラス（実施例Ｎα１）
従来ガラス（比較例Ｎα４）The drawing shows curves showing the spectral transmittance of the glass of the present invention and the conventional glass. Invention glass (Example Nα1) Conventional glass (Comparative example Nα4)
Claims (1)
Ｏ＿３７〜１２％、ＣａＯ＋ＭｇＯ２〜６名、ＺｎＯ１
〜３％、Ｎａ＿２Ｏ＋Ｋ＿２Ｏ６〜１２％、Ｂ＿２Ｏ＿
３０〜２％、ＣｕＯ２〜６％なる組成を有する近赤外カ
ットフィルターガラス。P_2O_570-76% by weight, Al_2
O_37~12%, CaO+MgO2~6 people, ZnO1
~3%, Na_2O+K_2O6~12%, B_2O_
A near-infrared cut filter glass having a composition of 30-2% CuO and 2-6% CuO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27224589A JPH03137037A (en) | 1989-10-18 | 1989-10-18 | Near-infrared cut-off filter glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27224589A JPH03137037A (en) | 1989-10-18 | 1989-10-18 | Near-infrared cut-off filter glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03137037A true JPH03137037A (en) | 1991-06-11 |
Family
ID=17511158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27224589A Pending JPH03137037A (en) | 1989-10-18 | 1989-10-18 | Near-infrared cut-off filter glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03137037A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0753945A (en) * | 1993-06-08 | 1995-02-28 | Asahi Glass Co Ltd | Near-infrared absorber |
| JP2002211951A (en) * | 2001-01-11 | 2002-07-31 | Okamoto Glass Co Ltd | Infrared ray-shielding green glass |
| JP2006076880A (en) * | 2004-09-10 | 2006-03-23 | Schott Ag | Use of lead-free and phosphate-containing glass in precision molding |
| WO2011046155A1 (en) * | 2009-10-16 | 2011-04-21 | 旭硝子株式会社 | Near-infrared ray cut filter glass |
| JP2018188353A (en) * | 2017-04-28 | 2018-11-29 | ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ | Filter glass |
-
1989
- 1989-10-18 JP JP27224589A patent/JPH03137037A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0753945A (en) * | 1993-06-08 | 1995-02-28 | Asahi Glass Co Ltd | Near-infrared absorber |
| JP2002211951A (en) * | 2001-01-11 | 2002-07-31 | Okamoto Glass Co Ltd | Infrared ray-shielding green glass |
| JP2006076880A (en) * | 2004-09-10 | 2006-03-23 | Schott Ag | Use of lead-free and phosphate-containing glass in precision molding |
| WO2011046155A1 (en) * | 2009-10-16 | 2011-04-21 | 旭硝子株式会社 | Near-infrared ray cut filter glass |
| JP5842613B2 (en) * | 2009-10-16 | 2016-01-13 | 旭硝子株式会社 | Near-infrared cut filter glass |
| JP2018188353A (en) * | 2017-04-28 | 2018-11-29 | ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ | Filter glass |
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