JPH06107426A - Optical glass - Google Patents
Optical glassInfo
- Publication number
- JPH06107426A JPH06107426A JP28073192A JP28073192A JPH06107426A JP H06107426 A JPH06107426 A JP H06107426A JP 28073192 A JP28073192 A JP 28073192A JP 28073192 A JP28073192 A JP 28073192A JP H06107426 A JPH06107426 A JP H06107426A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- optical glass
- optical
- bao
- component
- 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
- 239000005304 optical glass Substances 0.000 title claims abstract description 15
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 10
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 8
- 229910018068 Li 2 O Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 abstract description 38
- 239000000126 substance Substances 0.000 abstract description 16
- 230000003287 optical effect Effects 0.000 abstract description 13
- 239000010802 sludge Substances 0.000 abstract description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 2
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Inorganic materials O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- YEAUATLBSVJFOY-UHFFFAOYSA-N tetraantimony hexaoxide Chemical compound O1[Sb](O2)O[Sb]3O[Sb]1O[Sb]2O3 YEAUATLBSVJFOY-UHFFFAOYSA-N 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000004031 devitrification Methods 0.000 description 6
- 229910010413 TiO 2 Inorganic materials 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000008351 acetate buffer Substances 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000005331 crown glasses (windows) Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Glass Compositions (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ＳｉＯ2−ＴｉＯ2−Ｃ
ａＯ−ＢａＯ−Ｎａ2Ｏおよび／またはＫ2Ｏ系の組成を
有し、屈折率（Ｎｄ）が約１．５４〜１．６４およびア
ッベ数（νｄ）が約４０〜６０の範囲の光学恒数を示
し、かつ環境汚染問題を改善しつつ、優れた溶融性と温
純水洗浄に耐える優れた化学的耐久性を有する新規な光
学ガラスに関する。FIELD OF THE INVENTION The present invention relates to SiO 2 --TiO 2 --C.
aO-BaO-Na 2 O and / or K 2 O has the composition system, a refractive index (Nd) is optical constants in the range from about 1.54 to 1.64 and Abbe number ([nu] d) of about 40 to 60 The present invention relates to a novel optical glass exhibiting excellent melting properties and chemical durability that can withstand washing with warm pure water while exhibiting a number and improving environmental pollution problems.
【０００２】[0002]
【従来の技術】従来から前記の光学恒数を有するガラス
が種々知られており、例えば「ガラス組成データブック
・１９９１年（（社）日本硝子製品工業会発行）」には
バリウムクラウン系ガラスおよびバリウムフリント系ガ
ラスが多数記載されている。また特開昭５９−１６９９
５３号公報にはＳｉＯ2−Ｂ2Ｏ3−Ａｌ2Ｏ3−ＢａＯ−
ＲＯ系ガラスが開示されているが、これらのガラスは溶
融性は良好であるが化学的耐久性が未だ不十分であり、
しかも有害性の強いＰｂＯやＺｎＯを含んでいて、加工
時に排出するガラス屑やスラッジ等により環境を汚染す
るという問題がある。またガラスの洗浄工程での脱フロ
ン対策として温純水洗浄がとり入れられ、さらに耐久性
の良いガラスが要望されている。2. Description of the Related Art Conventionally, various glasses having the above optical constants have been known. For example, in "Glass Composition Data Book 1991 (published by Japan Glass Products Industry Association)", barium crown glass and Many barium flint type glasses are described. Also, JP-A-59-1699
No. 53 discloses that SiO 2 —B 2 O 3 —Al 2 O 3 —BaO—.
RO-based glasses are disclosed, but these glasses have good meltability but still insufficient chemical durability,
Moreover, there is a problem that it contains highly harmful PbO and ZnO and pollutes the environment with glass scraps and sludge discharged during processing. Further, warm pure water cleaning is incorporated as a measure for removing CFCs in the glass cleaning process, and there is a demand for a glass having better durability.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、上記
従来のガラスにみられる諸欠点を解消し、環境問題を改
善しつつ溶融性に優れ、しかも温純水洗浄に耐える一段
と向上した化学的耐久性を有する光学ガラスを提供する
ことにある。SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned drawbacks of conventional glass, to improve environmental problems, to have excellent meltability, and to further improve chemical durability to withstand hot water cleaning. To provide an optical glass having properties.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に、本発明者等は鋭意試験研究を重ねた結果、従来具体
的に開示されていない特定組成範囲のＳｉＯ2−ＴｉＯ2
−ＣａＯ−ＢａＯ−Ｎａ2Ｏおよび／またはＫ2Ｏ系光学
ガラスにおいて、前記光学恒数を有し、環境問題を改善
しつつ、溶融性に優れ、かつ温純水洗浄に耐える化学的
耐久性を有する光学ガラスが得られることをみいだし、
本発明をなすに至った。なお、ガラスの温純水洗浄にお
ける化学的耐久性の試験法としては、ガラス研磨面の耐
酸性評価法が適しており、その評価結果を改良すること
により本発明の目的が達成されることが分かった。In order to achieve the above object, the inventors of the present invention have conducted diligent tests and studies, and as a result, have found that SiO 2 --TiO 2 having a specific composition range not specifically disclosed in the past.
In -CaO-BaO-Na 2 O and / or K 2 O based optical glass, said having optical constants, while improving environmental problems, has a chemical durability to withstand excellent meltability and hot pure water washing We found that optical glass could be obtained,
The present invention has been completed. As a test method for chemical durability in washing glass with warm pure water, an acid resistance evaluation method for a glass polished surface is suitable, and it was found that the object of the present invention can be achieved by improving the evaluation result. .
【０００５】上記の目的を達成する本発明の光学ガラス
の組成の特徴は、重量％でＳｉＯ2４６．５〜５９％、
Ｂ2Ｏ3 ０〜１６％、Ａｌ2Ｏ3 ０〜６％、ただしＳｉ
Ｏ2＋Ａｌ2Ｏ3＋Ｂ2Ｏ3 ５２．５〜７５％、ＴｉＯ2
０．５〜１５％、ＣａＯ０．５〜１９％、ＢａＯ ７〜
１８％、ただしＣａＯ＋ＢａＯ １１〜３５％、Ｎａ2
Ｏ＋Ｋ2Ｏ ５〜２０％、Ｌｉ2Ｏ ０〜３％およびＳｂ
2Ｏ3 ０〜０．５％の範囲の各成分を含有し、かつ屈折
率（Ｎｄ）約１．５４〜１．６４、アッベ数（νｄ）約
４０〜６０の範囲の光学恒数を有することにある。The characteristics of the composition of the optical glass of the present invention which achieves the above object are characterized in that SiO 2 is 46.5 to 59% by weight.
B 2 O 3 0~16%, Al 2 O 3 0~6%, provided that Si
O 2 + Al 2 O 3 + B 2 O 3 52.5 to 75%, TiO 2
0.5-15%, CaO 0.5-19%, BaO 7-
18%, but CaO + BaO 11-35%, Na 2
O + K 2 O 5-20%, Li 2 O 0-3% and Sb
2 O 3 Contains each component in the range of 0 to 0.5% and has an optical constant in the range of refractive index (Nd) of about 1.54 to 1.64 and Abbe number (νd) of about 40 to 60. Especially.
【０００６】各成分の組成範囲を限定した理由は、次の
とおりである。すなわち、ＳｉＯ2成分はガラスを形成
させるのに必須の成分であるが、その量が４６．５％未
満であるとガラスの化学的耐久性が低下し、また５９％
を超えるとガラスの溶融性が悪化するので、４６．５〜
５９％の範囲とすべきである。Ｂ2Ｏ3成分はガラスの溶
融性および安定性向上のために有効であるので添加し得
るが、その量が１６％を超えるとガラスの化学的耐久性
が低下する。Ａｌ2Ｏ3成分は、光学恒数の調整およびガ
ラスの化学的耐久性を向上するのに有効であるので添加
し得るが、その量が６％を超えると溶融が困難になり、
均質化し難くなる。好ましくは２％以下とすべきであ
る。ただし、ＳｉＯ2、Ｂ2Ｏ3およびＡｌ2Ｏ3成分の合
計量は、目標の光学恒数とガラスの溶融性を維持しつつ
化学的耐久性を改善するため、５２．５〜７５％、好ま
しくは５２．５〜７３％とすべきである。ＴｉＯ2成分
はガラスを高屈折率にするのに有効な成分であるが、そ
の量が０．５％未満では上記効果が十分でなく、その量
が１５％を超えるとガラスの光線透過性と耐失透性が悪
化する。The reasons for limiting the composition range of each component are as follows. That is, the SiO 2 component is an essential component for forming glass, but if the amount is less than 46.5%, the chemical durability of the glass decreases, and 59%.
If it exceeds, the meltability of the glass deteriorates, so 46.5
It should be in the range of 59%. The B 2 O 3 component is effective for improving the melting property and stability of the glass, and thus can be added, but if the amount exceeds 16%, the chemical durability of the glass decreases. The Al 2 O 3 component can be added because it is effective for adjusting the optical constant and improving the chemical durability of the glass, but if the amount exceeds 6%, melting becomes difficult,
It becomes difficult to homogenize. It should preferably be 2% or less. However, the total amount of the SiO 2 , B 2 O 3 and Al 2 O 3 components is 52.5 to 75% in order to improve the chemical durability while maintaining the target optical constant and the meltability of the glass. It should preferably be 52.5 to 73%. The TiO 2 component is an effective component for making the glass have a high refractive index, but if the amount is less than 0.5%, the above effect is not sufficient, and if the amount exceeds 15%, the light transmittance of the glass is The devitrification resistance deteriorates.
【０００７】ＣａＯ成分は光学恒数の調整および化学的
耐久性の向上のため重要な成分であるが、その量が０．
５％未満では上記の効果は十分でなく、また１９％を超
えるとガラスの耐失透性が悪くなる。ＢａＯ成分はガラ
スの失透傾向を防止し、所望の光学恒数を維持するため
に重要な成分であるが、その量が７％未満ではガラスの
失透傾向が増大すると共に屈折率が低下し、また１８％
を超えると化学的耐久性が低下する。ただしＣａＯおよ
びＢａＯ成分の合計量は、ガラスの化学的耐久性を悪化
させることなく所定の光学恒数と耐失透性を与えるため
１１〜３５％の範囲とする。Ｎａ2Ｏ、Ｋ2ＯおよびＬｉ
2Ｏの各成分は、ガラスの溶融性を向上し失透傾向と着
色の抑制に有効であるが、Ｎａ2ＯおよびＫ2Ｏの各成分
の１種または２種の合計量が５％未満ではこれらの効果
が十分でなく、また２０％を超えると化学的耐久性が悪
くなる。Ｌｉ2Ｏ成分は、その量が３％を超えるとかえ
ってガラスは失透し易くなる。Ｓｂ2Ｏ3成分は脱泡促進
剤として有効であるが、０．５％までで十分である。な
お、本発明のガラスに上記以外の成分、例えばＭｇＯ成
分を４％程度まで、ガラスの光学恒数の調整または溶融
性の改善のため必要に応じて添加してもさしつかえな
い。The CaO component is an important component for adjusting the optical constants and improving the chemical durability, but the amount thereof is 0.
If it is less than 5%, the above effect is not sufficient, and if it exceeds 19%, the devitrification resistance of the glass is deteriorated. The BaO component is an important component for preventing the devitrification tendency of the glass and maintaining a desired optical constant, but if the amount is less than 7%, the devitrification tendency of the glass increases and the refractive index decreases. , Again 18%
If it exceeds, the chemical durability will decrease. However, the total amount of the CaO and BaO components is in the range of 11 to 35% in order to give a predetermined optical constant and devitrification resistance without deteriorating the chemical durability of the glass. Na 2 O, K 2 O and Li
Each component of 2 O is effective in improving the melting property of glass and suppressing devitrification tendency and coloring, but the total amount of one or two components of Na 2 O and K 2 O is less than 5%. However, these effects are not sufficient, and if it exceeds 20%, the chemical durability is deteriorated. When the amount of the Li 2 O component exceeds 3%, the glass tends to devitrify. The Sb 2 O 3 component is effective as a defoaming accelerator, but 0.5% is sufficient. It should be noted that components other than the above, such as MgO components, up to about 4% may be added to the glass of the present invention as needed to adjust the optical constant of the glass or to improve the meltability.
【０００８】[0008]
【実施例】次に、本発明の光学ガラスの好適な実施例
（Ｎｏ．１〜Ｎｏ．１０）および従来技術の比較例（Ｎ
ｏ．ＡおよびＮｏ．Ｂ）を、これらのガラスの屈折率
（Ｎｄ）、アッベ数（νｄ）、耐酸性（ＳＲ）数値と共
に表１に示した。EXAMPLES Next, preferred examples (No. 1 to No. 10) of the optical glass of the present invention and a comparative example (N) of the prior art.
o. A and No. B) is shown in Table 1 together with the refractive index (Nd), Abbe number (νd) and acid resistance (SR) of these glasses.
【０００９】[0009]
【表１】
（単位；重量％） [Table 1]
(Unit:% by weight)
【表１】
（単位；重量％） [Table 1]
(Unit:% by weight)
【表１】
（単位；重量％） [Table 1]
(Unit:% by weight)
【表１】
（単位；重量％） [Table 1]
(Unit:% by weight)
【００１０】なお、上記ＳＲ値は国際標準化機構ＩＳＯ
８４２４：１９８７（Ｅ）の測定方法に準拠し、測定し
て得た結果を示したものである。ここでＳＲ値は、所定
の酸処理液中におけるガラス試料が０．１μｍの侵食を
受けるのに要した時間（ｈｒ）によって等級付けしたも
のである。ＳＲ値が１、２、３、４および５の場合は、
ｐＨ０．３の硝酸溶液を用いてそれぞれ１００ｈｒ以
上、１０〜１００ｈｒ、１〜１０ｈｒ、０．１から１お
よび０．１ｈｒ以下を要したことを示す。またＳＲ値が
５および５１の場合はいずれもｐＨ４．６の酢酸緩衝液
を用いて、それぞれ１０ｈｒ以上および１〜１０ｈｒを
要したことを示している。The SR value is based on the International Organization for Standardization ISO
8424: 1987 (E) based on the measurement method. Here, the SR value is graded according to the time (hr) required for a glass sample in a predetermined acid treatment liquid to be corroded by 0.1 μm. For SR values of 1, 2, 3, 4 and 5,
It is shown that it took 100 hours or more, 10 to 100 hours, 1 to 10 hours, 0.1 to 1 and 0.1 hours or less using the nitric acid solution of pH 0.3. Further, in the case where the SR values are 5 and 51, it is shown that it took 10 hours or more and 1 to 10 hours using the acetate buffer of pH 4.6, respectively.
【００１１】表１にみられるとおり、本発明の実施例の
ガラスＮｏ．２およびＮｏ．１０は、それぞれほぼ同等
の光学恒数を有する比較例のガラスＮｏ．ＡおよびＮ
ｏ．Ｂと比較するといずれもＳＲ値が向上し、一段と優
れた化学的耐久性を示しているため温純水洗浄に十分耐
えることができる。本発明の他の実施組成例のガラスも
同様に優れたＳＲ値を示している。また、本発明の上記
実施組成例のガラスは、炭酸塩、硝酸塩および酸化物等
の通常の光学ガラス用原料を秤量混合し、これを白金坩
堝等を用い、約１１００〜１３５０℃、約２〜５時間で
溶融脱泡し、攪拌均質化した後、金型に鋳込み徐冷する
ことにより容易に得ることができる。As can be seen from Table 1, the glass Nos. Of the examples of the present invention were used. 2 and No. No. 10 is a glass No. of a comparative example having almost the same optical constants. A and N
o. Compared with B, the SR value was improved in all cases, and the chemical durability was further excellent, so that it was possible to sufficiently withstand the washing with hot pure water. The glasses of other composition examples of the present invention also show excellent SR values. Further, in the glass of the above-described compositional examples of the present invention, ordinary optical glass raw materials such as carbonates, nitrates and oxides are weighed and mixed, and this is used in a platinum crucible or the like at about 1100 to 1350 ° C., about 2 to It can be easily obtained by melting and defoaming for 5 hours, homogenizing by stirring, and then casting in a mold and gradually cooling.
【００１２】[0012]
【発明の効果】以上述べたとおり、本発明の光学ガラス
は特定組成範囲のＳｉＯ2−ＴｉＯ2−ＣａＯ−ＢａＯ−
Ｎａ2Ｏおよび／またはＫ2Ｏ系ガラスであり、従って屈
折率（Ｎｄ）が約１．５４〜１．６４およびアッベ数
（νｄ）が約４０〜６０の範囲の光学恒数を有し、前記
の有害成分を含まず、従来のガラスに比べて化学的耐久
性に優れているため、温純水洗浄等に十分耐えられ、さ
らに溶融性も良好であって量産性に優れている。As described above, the optical glass of the present invention has a specific composition range of SiO 2 —TiO 2 —CaO—BaO—.
Na 2 O and / or K 2 O based glass, and therefore has an optical constant in which the refractive index (Nd) is approximately 1.54 to 1.64 and the Abbe number (νd) is approximately 40 to 60, Since it does not contain the above-mentioned harmful components and has excellent chemical durability as compared with conventional glass, it can sufficiently withstand washing with hot pure water and the like and has good meltability and mass productivity.
フロントページの続き (72)発明者 八田 比佐雄 神奈川県相模原市小山１丁目15番30号 株 式会社オハラ内Front page continuation (72) Inventor Hisao Hatta 1-15-30 Koyama, Sagamihara City, Kanagawa Prefecture
Claims (2)
％、Ｂ2Ｏ3 ０〜１６％、Ａｌ2Ｏ3 ０〜６％、ただし
ＳｉＯ2＋Ａｌ2Ｏ3＋Ｂ2Ｏ3 ５２．５〜７５％、Ｔｉ
Ｏ2 ０．５〜１５％、ＣａＯ ０．５〜１９％、Ｂａ
Ｏ ７〜１８％、ただしＣａＯ＋ＢａＯ １１〜３５
％、Ｎａ2Ｏ＋Ｋ2Ｏ ５〜２０％、Ｌｉ2Ｏ ０〜３
％、Ｓｂ2Ｏ3 ０〜０．５％の範囲の各成分を含有し、
かつ屈折率（Ｎｄ）約１．５４〜１．６４、アッベ数
（νｄ）約４０〜６０の範囲の光学恒数を有することを
特徴とする光学ガラス。1. SiO 2 46.5-59, by weight.
%, B 2 O 3 0 to 16%, Al 2 O 3 0 to 6%, provided that SiO 2 + Al 2 O 3 + B 2 O 3 52.5 to 75%, Ti
O 2 0.5~15%, CaO 0.5~19% , Ba
O 7-18%, but CaO + BaO 11-35
%, Na 2 O + K 2 O 5-20%, Li 2 O 0-3
%, Sb 2 O 3 containing 0 to 0.5% of each component,
An optical glass having a refractive index (Nd) of about 1.54 to 1.64 and an Abbe number (νd) of about 40 to 60.
Ｏ3＋Ｂ2Ｏ3が５２．５〜７３％であることを特徴とす
る請求項１に記載の光学ガラス。2. Al 2 O 3 0-2% and SiO 2 + Al 2
The optical glass according to claim 1, O 3 + B 2 O 3 is characterized in that it is a 52.5 to 73%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4280731A JP2933453B2 (en) | 1992-09-25 | 1992-09-25 | Optical glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4280731A JP2933453B2 (en) | 1992-09-25 | 1992-09-25 | Optical glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06107426A true JPH06107426A (en) | 1994-04-19 |
| JP2933453B2 JP2933453B2 (en) | 1999-08-16 |
Family
ID=17629166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4280731A Expired - Fee Related JP2933453B2 (en) | 1992-09-25 | 1992-09-25 | Optical glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2933453B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2328937A (en) * | 1997-09-03 | 1999-03-10 | Zeiss Stiftung | Lead-free optical barium flint glass |
| US6551952B2 (en) * | 1999-12-04 | 2003-04-22 | Schott Glas | Lead-free optical light flint glass materials |
| JP2011079688A (en) * | 2008-10-07 | 2011-04-21 | Nippon Electric Glass Co Ltd | Optical glass |
| JP2018118900A (en) * | 2017-01-25 | 2018-08-02 | 日本電気硝子株式会社 | Optical glass lens |
| JP2020105058A (en) * | 2018-12-28 | 2020-07-09 | 株式会社住田光学ガラス | Optical glass, precise press molding preform and optical element |
| CN111533443A (en) * | 2020-05-27 | 2020-08-14 | 成都光明光电股份有限公司 | Optical glass |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH035341A (en) * | 1989-05-31 | 1991-01-11 | Hoya Corp | Optical glass |
| JPH0437628A (en) * | 1990-05-29 | 1992-02-07 | Hoya Corp | Optical glass |
-
1992
- 1992-09-25 JP JP4280731A patent/JP2933453B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH035341A (en) * | 1989-05-31 | 1991-01-11 | Hoya Corp | Optical glass |
| JPH0437628A (en) * | 1990-05-29 | 1992-02-07 | Hoya Corp | Optical glass |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2328937A (en) * | 1997-09-03 | 1999-03-10 | Zeiss Stiftung | Lead-free optical barium flint glass |
| GB2328937B (en) * | 1997-09-03 | 2001-05-30 | Zeiss Stiftung | Lead-free optical barium flint glass |
| US6551952B2 (en) * | 1999-12-04 | 2003-04-22 | Schott Glas | Lead-free optical light flint glass materials |
| JP2011079688A (en) * | 2008-10-07 | 2011-04-21 | Nippon Electric Glass Co Ltd | Optical glass |
| JP2018118900A (en) * | 2017-01-25 | 2018-08-02 | 日本電気硝子株式会社 | Optical glass lens |
| JP2020105058A (en) * | 2018-12-28 | 2020-07-09 | 株式会社住田光学ガラス | Optical glass, precise press molding preform and optical element |
| CN111533443A (en) * | 2020-05-27 | 2020-08-14 | 成都光明光电股份有限公司 | Optical glass |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2933453B2 (en) | 1999-08-16 |
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