JPS6033229A - Optical glass having high refractive index - Google Patents

Optical glass having high refractive index

Info

Publication number
JPS6033229A
JPS6033229A JP13923183A JP13923183A JPS6033229A JP S6033229 A JPS6033229 A JP S6033229A JP 13923183 A JP13923183 A JP 13923183A JP 13923183 A JP13923183 A JP 13923183A JP S6033229 A JPS6033229 A JP S6033229A
Authority
JP
Japan
Prior art keywords
refractive index
glass
sio2
high refractive
optical glass
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
Application number
JP13923183A
Other languages
Japanese (ja)
Inventor
Hiroaki Ueda
裕昭 上田
Hajime Maenaka
前中 肇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Minolta Co Ltd
Original Assignee
Minolta Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP13923183A priority Critical patent/JPS6033229A/en
Publication of JPS6033229A publication Critical patent/JPS6033229A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/062Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

PURPOSE:To obtain optical glass with high meltability and high refractive index by using a glass compsn. having specified proportion of La2O3, TiO2, B2O3, and SiO2, and specified weight of total of B2O3 and SiO2. CONSTITUTION:Glass compsn. comprising by wt% 25-55 La2O3, 14-30 TiO2, 5-20 B2O3, and 4.5-12 SiO2, and 9.5-25 B2O3+SiO2 is prepd. If necessary, 0-20 GeO2 and 0-10 Al2O3 may be contained. Further, at least one among 0-20 Ta2O5, 0-20 Nb2O5, 0-20 at least one among CaO, SrO, BaO, ZnO, and PbO, 0-15 Y2O3, 0-15 Gd2O3, 0-15 Yb2O3, 0-15 WO3, and 0-13 Zr2O3 may be contained as modifying oxide, and 0-1 As2O3, and 0-1 Sb2O3 may be added as defoaming agent. By this compsn., optical glass having 1.90-2.10 refractive index and 22-35 Abbe' number is obtained.

Description

【発明の詳細な説明】 本発明は光学ガラスに関し、更に詳しくはレーザー光を
用いるコンパクトディス身用プレーヤーや光フアイバー
用コネクターのレンズなどに用いられる高屈折率の光学
ガラスに関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to optical glass, and more particularly to optical glass with a high refractive index used in compact disc players using laser light, lenses for optical fiber connectors, and the like.

従来、特公昭53−42330号公報においてB201
1−LazOs−Y2O2−TiOz (D 4成分を
必須とし、屈折率ndが1.79〜1.93.7−) 
ヘ数νdが30−41の高屈折率ガラスは知られている
Previously, in Japanese Patent Publication No. 53-42330, B201
1-LazOs-Y2O2-TiOz (D4 component is essential, refractive index nd is 1.79 to 1.93.7-)
High refractive index glasses with a f number νd of 30-41 are known.

本発明は、この従来例よりも更に溶融性が良く、かつ、
屈折率ndが1.90〜2.10.7 ッヘ数j/d 
カ22〜35の光学性能を有する光学ガラスを提供する
ことを目的とするものである。
The present invention has better meltability than this conventional example, and
Refractive index nd is 1.90 to 2.10.7 Che number j/d
The object of the present invention is to provide an optical glass having an optical performance of F22 to F35.

TiO2は高屈折率成分であるとともにガラスの化学的
耐久性を高めて溶融性を良くする成分でもあるか、多量
に含有させすぎると失透しやすくなり、この為に上記従
来例では2〜19重量%(以下単に%という)に限定さ
れている。一方、近年レーザー光を用いるコンパクトデ
ィスクのプレーヤー光学系の性能向」二や、ファイバー
用コネクターの小型化の為により高屈折率のガラスが望
まれている。そこで、本発明は、上記従来例の必須成分
である高価なY2O3に代えて失透を抑えてガラスを安
定化させる5102を必須とし、このS io2との共
存によりTi0zを更に大量に尊大して高屈折率として
も失透か生じないようにしたことを特徴とする。
TiO2 is not only a high refractive index component but also a component that increases the chemical durability of glass and improves its meltability.If it is contained in too large a quantity, TiO2 tends to devitrify. It is limited to % by weight (hereinafter simply referred to as %). On the other hand, in recent years, glass with a higher refractive index has been desired in order to improve the performance of compact disc player optical systems that use laser light and to downsize fiber connectors. Therefore, in the present invention, 5102, which suppresses devitrification and stabilizes the glass, is essential instead of the expensive Y2O3, which is an essential component in the conventional example, and by coexisting with this Sio2, Ti0z is further enlarged and high. It is characterized in that the refractive index does not cause devitrification.

そして、より具体的には、本発明に係る高JFJA折率
光学ガラスは、以下の組成範囲からなるものである。
More specifically, the high JFJA refractive index optical glass according to the present invention has the following composition range.

La20a 25〜55% Ti()z 14〜30% B2O35〜20% 5iO24,5〜 12% 但し、B2O5+5i02の合量9,5〜25%Ta2
05 0〜20% Nb2O5O〜 20’X GeO2o 〜 20幅 Cab、 SrQ、 BaQ ZnO,PbOのうちの
1種または2種以上の組合せ 0〜20% Y2O30〜15% GdzOa O” 15% YbzO++ O〜15% WOa o 〜1s% Zr020−13% Al2O80−10% A3208 0〜1% SbzOg O〜 1% 以下、各成分の含有畑限定理由について説明する。
La20a 25-55% Ti()z 14-30% B2O35-20% 5iO24.5-12% However, the total amount of B2O5+5i02 is 9.5-25% Ta2
05 0-20% Nb2O5O~ 20' % WOa o ~1s% Zr020-13% Al2O80-10% A3208 0-1% SbzOg O~1% The reasons for limiting the fields containing each component will be explained below.

La2’gは、高屈折率を達成すを為に人情に含有させ
られる成分てあり、目的とする屈折率を得る為には25
%以上を必要とするか、55%を越えると失透しやすく
なる。TiO2も、上述のように高屈折率を達成し、か
つ、ガラスを安定させる為の成分であり、14%未満で
は目的とする高屈折率が得られないし、一方、30%を
越えると失透しやすくなる。B2O3は、ガラス形成酸
化物で失透を抑える為に有効な必須成分であり、5%未
満では失透しやすくなり、20%を越えると目的とする
高屈折率か達成できなくなる。5102は失透を抑える
とともにガラスを安定化させるガラス形成酸化物であり
、4,5%未満ではガラス粘度か低いので脈理が生じや
すい上に失透しやすく、12%を越えると溶融時に溶融
せずに残ってしまう。ここてB2O3と5102との合
量が25%を越えると目的とする高屈折率が得られず、
95%未満では失透しやすい。
La2'g is a component that is intentionally included in order to achieve a high refractive index.
% or more, or if it exceeds 55%, devitrification tends to occur. As mentioned above, TiO2 is also a component to achieve a high refractive index and stabilize the glass, and if it is less than 14%, the desired high refractive index cannot be obtained, while if it exceeds 30%, it will devitrify. It becomes easier to do. B2O3 is a glass-forming oxide and is an essential component effective for suppressing devitrification; if it is less than 5%, devitrification tends to occur, and if it exceeds 20%, the desired high refractive index cannot be achieved. 5102 is a glass-forming oxide that suppresses devitrification and stabilizes the glass. If it is less than 4.5%, the glass viscosity is low, so it is easy to cause striae and devitrification. If it exceeds 12%, it will melt during melting. I will remain without doing so. If the total amount of B2O3 and 5102 exceeds 25%, the desired high refractive index cannot be obtained,
If it is less than 95%, devitrification tends to occur.

更に、必要に応じて以下のものを含有させても良い。ま
ず−G602はガラス形成酸化物でありガラスを安定に
する為に20%以下含有させても良いか、20%を越え
ると°溶融時に溶融せずに残ってしまう。
Furthermore, the following may be included as necessary. First, -G602 is a glass-forming oxide, and in order to stabilize the glass, it may be contained in an amount of 20% or less, or if it exceeds 20%, it will remain unmelted during melting.

また高価な成分である為に多量に含有させると原料費が
高1i1i−になりすぎる。A12011は中間酸化物
であり、ガラス粘度を高め耐失透性を良好にする為に1
 ’O%以下で含有させても良いが、10%を越えると
目的とする高屈折率が得られない。
Moreover, since it is an expensive component, if it is contained in a large amount, the raw material cost will be too high. A12011 is an intermediate oxide, and 1 is added to increase glass viscosity and improve devitrification resistance.
Although it may be contained in an amount of 0% or less, if it exceeds 10%, the desired high refractive index cannot be obtained.

また、Ta205. Nb2O5,Cab、 sro、
 BaQ ZnQ l’bQ Y2O8GdzOi、 
Yb20s、 WOs、 ZrO2などの修飾酸化物を
それぞれ上記所定範囲内で含有させると、ガラスの安定
化、高屈折率化、または耐失透性の向上をはかることが
できる。Ta2O6及びNbzOsは、それぞれ、高屈
折率化及び安定化の為に20%まで、導入可能であるか
、いずれも20鳴を越えると失透しやすくなる。Ca、
Q SrQ BaO及びZnOはガラスを安定化する為
に導入可能であり、PbOはガラスを安定化するととも
に高屈折率化する為に導入可能であるけれども、これら
の1種もしくは2種以上の組合せか20%を越えると失
透しやすくなる。
Also, Ta205. Nb2O5, Cab, sro,
BaQ ZnQ l'bQ Y2O8GdzOi,
By containing modified oxides such as Yb20s, WOs, and ZrO2 within the above-mentioned predetermined ranges, it is possible to stabilize the glass, increase the refractive index, or improve the devitrification resistance. Ta2O6 and NbzOs can each be introduced in an amount of up to 20% to increase the refractive index and stabilize it, or if both exceed 20 Nb, they tend to devitrify. Ca,
Q SrQ BaO and ZnO can be introduced to stabilize the glass, and PbO can be introduced to stabilize the glass and increase the refractive index, but only one type or a combination of two or more of these can be introduced. If it exceeds 20%, devitrification tends to occur.

YzOs、 GdzOs、 YbzOg及びWOsは、
それぞれガラスの安定化及び高屈折率化の為に15%ま
で導入可能であるけれども、15%を越えるき失透しや
すくなる。ZrO2もガラスの安定化及び高屈折率化の
為に13%まで導入可能であるが、これを越えると耐失
透性か悪化する。
YzOs, GdzOs, YbzOg and WOs are
Although it is possible to introduce up to 15% to stabilize the glass and increase the refractive index, if it exceeds 15%, devitrification tends to occur. ZrO2 can also be introduced up to 13% to stabilize the glass and increase the refractive index, but if it exceeds this, the devitrification resistance will deteriorate.

また泡切剤としてA320g、 Sb20gをそれぞれ
1%以下で導入をさせても良い。
Further, 320 g of A and 20 g of Sb may be introduced as foam removers at 1% or less each.

以下、本発明の実施例を第1表に示す。各実施例は、い
ずれも、従来と同様に、白金ルツボに調合した原料バッ
チを投入し、1400℃に維持しし て適宜攪拌した後、予熱した鋳型にキャス)+徐冷する
ことによって製造される。第1表中「−」はその成分が
含まれていないことを示す。
Examples of the present invention are shown in Table 1 below. Each of the examples was manufactured by charging a prepared batch of raw materials into a platinum crucible, maintaining it at 1400°C and stirring appropriately, and then casting it into a preheated mold and slowly cooling it, as in the past. Ru. In Table 1, "-" indicates that the component is not included.

(JA人T匁ω) 第1表(JA person T momme ω) Table 1

Claims (1)

【特許請求の範囲】 重量%で以下の組成範囲からなることを特徴とする高屈
折率光学ガラス: La20g 25〜55 TiO214−30 BzOa5−20 S io 2 4.5〜12 但し、BzOs+SiO2の合量95〜25Ta20s
 O−2O Nl)205 0−20 GeO20−20 Cab、 SrQ Bad、 ZnO,PbOのうちの
1種または2種以上の組合せ O〜20 Y2O110〜15 Gd20s O〜15 YbzOg O〜 15 wo8 0〜15 ZrOz’ 0−13 A120a Q 〜 1O AS208 Q 〜 l 5b20s 0 、 1
[Claims] A high refractive index optical glass characterized by having the following composition range in weight%: La20g 25-55 TiO214-30 BzOa5-20 Sio2 4.5-12 However, the total amount of BzOs+SiO2 95~25Ta20s
O-2O Nl)205 0-20 GeO20-20 Cab, SrQ Bad, one or more combinations of two or more of ZnO and PbO O~20 Y2O110~15 Gd20s O~15 YbzOg O~ 15 wo8 0~15 ZrOz ' 0-13 A120a Q ~ 1O AS208 Q ~ l 5b20s 0, 1
JP13923183A 1983-07-28 1983-07-28 Optical glass having high refractive index Pending JPS6033229A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13923183A JPS6033229A (en) 1983-07-28 1983-07-28 Optical glass having high refractive index

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13923183A JPS6033229A (en) 1983-07-28 1983-07-28 Optical glass having high refractive index

Publications (1)

Publication Number Publication Date
JPS6033229A true JPS6033229A (en) 1985-02-20

Family

ID=15240530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13923183A Pending JPS6033229A (en) 1983-07-28 1983-07-28 Optical glass having high refractive index

Country Status (1)

Country Link
JP (1) JPS6033229A (en)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10227494C1 (en) * 2002-06-19 2003-12-04 Schott Glas Lead-free optical glass with specified refractive index and Abbe number, for optics, laser technology and communications, has specified composition
JP2007022846A (en) * 2005-07-15 2007-02-01 Hoya Corp Optical glass, glass gob for press forming and optical element
JP2007112697A (en) * 2005-09-21 2007-05-10 Hoya Corp Optical glass, glass gob for press molding, glass molding, optical element and method for producing them
EP2018590A1 (en) * 2006-05-03 2009-01-28 3M Innovative Properties Company Led extractor composed of high index glass
US7513941B2 (en) 2005-11-14 2009-04-07 3M Innovative Properties Company Pavement marking, reflective elements, and methods of making micospheres
JP2009184870A (en) * 2008-02-06 2009-08-20 Shinshu Univ Method for producing lens, and lens
WO2010071202A1 (en) * 2008-12-18 2010-06-24 日本板硝子株式会社 Glass, and glass processing method
DE102009010701A1 (en) * 2009-02-27 2010-09-09 Schott Ag Optical glass
WO2011065097A1 (en) * 2009-11-26 2011-06-03 コニカミノルタオプト株式会社 Optical glass and optical element
US8034733B2 (en) * 2006-03-22 2011-10-11 Hoya Corporation Optical glass, optical element and method of manufacturing thereof
JP2013116850A (en) * 2007-06-25 2013-06-13 Nippon Electric Glass Co Ltd Optical glass for mold press forming
US9302930B2 (en) 2012-02-28 2016-04-05 Hoya Corporation Optical glass and use thereof
JP2016199408A (en) * 2015-04-07 2016-12-01 日本電気硝子株式会社 Optical glass and method for producing the same
JP2016216282A (en) * 2015-05-18 2016-12-22 株式会社オハラ Optical glass and optical element
US9643880B2 (en) 2013-08-23 2017-05-09 Hoya Corporation Optical glass and use thereof
JP2018090474A (en) * 2016-11-30 2018-06-14 株式会社オハラ Optical glass, preform, and optical element
JP2018172275A (en) * 2018-06-26 2018-11-08 Hoya株式会社 Optical glass and application thereof
JP2020073453A (en) * 2018-06-26 2020-05-14 Hoya株式会社 Optical glass and application thereof
CN111406039A (en) * 2017-12-27 2020-07-10 株式会社小原 Optical glass, preform, and optical element
CN112142320A (en) * 2019-06-28 2020-12-29 Hoya株式会社 Glass material for reheat pressing, glass material subjected to reheat pressing, glass subjected to polishing, and methods for producing same
DE102021109897A1 (en) 2021-04-20 2022-10-20 Schott Ag Glasses with high refractive index and low density
WO2023017759A1 (en) * 2021-08-12 2023-02-16 日本電気硝子株式会社 Optical glass plate
WO2024004712A1 (en) * 2022-06-27 2024-01-04 日本電気硝子株式会社 Optical element manufacturing method and optical element

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7091145B2 (en) 2002-06-19 2006-08-15 Schott Ag Lead-free and preferably arsenic-free lanthanum heavy flint glass
DE10227494C1 (en) * 2002-06-19 2003-12-04 Schott Glas Lead-free optical glass with specified refractive index and Abbe number, for optics, laser technology and communications, has specified composition
US7615507B2 (en) 2005-07-15 2009-11-10 Hoya Corporation Optical glass, press-molding glass gob and optical element
JP2007022846A (en) * 2005-07-15 2007-02-01 Hoya Corp Optical glass, glass gob for press forming and optical element
JP2007112697A (en) * 2005-09-21 2007-05-10 Hoya Corp Optical glass, glass gob for press molding, glass molding, optical element and method for producing them
US7513941B2 (en) 2005-11-14 2009-04-07 3M Innovative Properties Company Pavement marking, reflective elements, and methods of making micospheres
US7745360B2 (en) 2005-11-14 2010-06-29 3M Innovative Properties Company Pavement marking, reflective elements, and methods of making microspheres
US7579293B2 (en) 2005-11-14 2009-08-25 3M Innovative Properties Company Pavement marking, reflective elements, and methods of making microspheres
US8034733B2 (en) * 2006-03-22 2011-10-11 Hoya Corporation Optical glass, optical element and method of manufacturing thereof
EP2018590A4 (en) * 2006-05-03 2011-08-03 3M Innovative Properties Co Led extractor composed of high index glass
EP2018590A1 (en) * 2006-05-03 2009-01-28 3M Innovative Properties Company Led extractor composed of high index glass
JP2013116850A (en) * 2007-06-25 2013-06-13 Nippon Electric Glass Co Ltd Optical glass for mold press forming
JP2009184870A (en) * 2008-02-06 2009-08-20 Shinshu Univ Method for producing lens, and lens
WO2010071202A1 (en) * 2008-12-18 2010-06-24 日本板硝子株式会社 Glass, and glass processing method
DE102009010701A1 (en) * 2009-02-27 2010-09-09 Schott Ag Optical glass
US8404606B2 (en) 2009-02-27 2013-03-26 Schott Ag Optical glass, optical elements made therefrom, method of making the optical elements from the glass, and optical components comprising one or more optical elements
DE102009010701B4 (en) * 2009-02-27 2016-12-15 Schott Ag Optical glass
WO2011065097A1 (en) * 2009-11-26 2011-06-03 コニカミノルタオプト株式会社 Optical glass and optical element
US8835336B2 (en) 2009-11-26 2014-09-16 Konica Minolta Advanced Layers, Inc. Optical glass and optical element
US9302930B2 (en) 2012-02-28 2016-04-05 Hoya Corporation Optical glass and use thereof
US9643880B2 (en) 2013-08-23 2017-05-09 Hoya Corporation Optical glass and use thereof
JP2016199408A (en) * 2015-04-07 2016-12-01 日本電気硝子株式会社 Optical glass and method for producing the same
JP2016216282A (en) * 2015-05-18 2016-12-22 株式会社オハラ Optical glass and optical element
JP2018090474A (en) * 2016-11-30 2018-06-14 株式会社オハラ Optical glass, preform, and optical element
CN111406039A (en) * 2017-12-27 2020-07-10 株式会社小原 Optical glass, preform, and optical element
JP2018172275A (en) * 2018-06-26 2018-11-08 Hoya株式会社 Optical glass and application thereof
JP2020073453A (en) * 2018-06-26 2020-05-14 Hoya株式会社 Optical glass and application thereof
CN112142320A (en) * 2019-06-28 2020-12-29 Hoya株式会社 Glass material for reheat pressing, glass material subjected to reheat pressing, glass subjected to polishing, and methods for producing same
DE102021109897A1 (en) 2021-04-20 2022-10-20 Schott Ag Glasses with high refractive index and low density
WO2023017759A1 (en) * 2021-08-12 2023-02-16 日本電気硝子株式会社 Optical glass plate
WO2024004712A1 (en) * 2022-06-27 2024-01-04 日本電気硝子株式会社 Optical element manufacturing method and optical element

Similar Documents

Publication Publication Date Title
JPS6033229A (en) Optical glass having high refractive index
JPS61197443A (en) Optical glass
JP2795326B2 (en) Optical glass
JP2565813B2 (en) Optical glass
JPS61232243A (en) Glass for spectacle and optical use
JPS647012B2 (en)
JPH05270853A (en) Highly dispersive optical glass
JPH10265238A (en) Optical glass having negative anomalous dispensability
JPH01308843A (en) Optical glass
JPH0624789A (en) High-refractive-index opthalmic and optical glass
JPS6046948A (en) Glass having high refractive index and low despersion
JPH02305B2 (en)
JPS61146732A (en) Glass having high refractive index and high dispersion
JPS6114090B2 (en)
JPS5846459B2 (en) Low density flint optical glass
JP3238740B2 (en) Optical glass
JPH07149536A (en) Optical glass
JPH0848538A (en) Optical glass
JPS6022656B2 (en) optical glass
JPS638056B2 (en)
JP3269707B2 (en) Eyeglasses and optical lightweight glass
JP2000128570A (en) Optical glass
JP3396450B2 (en) Glasses for glasses and optics
JP3034427B2 (en) Low temperature softening optical glass for mold press
JPH0741334A (en) Optical glass