JPH01286934A - Optical glass for precision press forming - Google Patents
Optical glass for precision press formingInfo
- Publication number
- JPH01286934A JPH01286934A JP11315288A JP11315288A JPH01286934A JP H01286934 A JPH01286934 A JP H01286934A JP 11315288 A JP11315288 A JP 11315288A JP 11315288 A JP11315288 A JP 11315288A JP H01286934 A JPH01286934 A JP H01286934A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- refractive index
- cao
- optical glass
- bao
- 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 18
- 239000006185 dispersion Substances 0.000 claims abstract description 9
- 239000011521 glass Substances 0.000 abstract description 20
- 239000000203 mixture Substances 0.000 abstract description 6
- 238000013329 compounding Methods 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 4
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 abstract 3
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 abstract 3
- GOLCXWYRSKYTSP-UHFFFAOYSA-N Arsenious Acid Chemical compound O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 abstract 2
- 229910011255 B2O3 Inorganic materials 0.000 abstract 2
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 abstract 2
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- 229910052682 stishovite Inorganic materials 0.000 abstract 2
- 229910052905 tridymite Inorganic materials 0.000 abstract 2
- -1 Gd2O3 Chemical compound 0.000 abstract 1
- 239000011814 protection agent Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- BLBNEWYCYZMDEK-UHFFFAOYSA-N $l^{1}-indiganyloxyindium Chemical compound [In]O[In] BLBNEWYCYZMDEK-UHFFFAOYSA-N 0.000 description 1
- 229910017583 La2O Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 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
- 238000004031 devitrification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004017 vitrification 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
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
- C03C3/068—Glass 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
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、比較的低温でプレス成形可能な精密プレスレ
ンズ用の光学ガラスに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an optical glass for precision press lenses that can be press-formed at relatively low temperatures.
従来の技術 従来同じような光学恒数を持つものとして。Conventional technology Assuming that it has the same optical constants as before.
高屈折率低分散タイプ（ｎｄ 〜１．６５以上、１４２
５０以上）の光学ガラスが存在する。しかし、このタイ
プのガラスは、軟化温度が高く安定性が悪いので、精密
プレス成形用のガラスとしては速さない。High refractive index low dispersion type (nd ~1.65 or more, 142
There are over 50 optical glasses. However, this type of glass has a high softening temperature and poor stability, so it is not suitable for precision press molding.
発明が解決しようとする課題
従来よりある高屈折率低分散タイプ（ｎ ｄ ｗ＋ １
゜６５以上、νｄ＝５０以上）の光学ガラスは、屈伏温
度（Ａｔ）が６５０℃もしくはそれ以上のものしか存在
せず、そのプレス温度は７００℃を超える高い温度でな
ければ成形することが出来なかった。 第１表に高屈
折率低分散タイプの例＜ｍ折率（ｎｄ）、アツベ数（ν
ｄ）、屈伏濃度（＾１））を示す。Problems to be solved by the invention Conventional high refractive index low dispersion type (nd w+ 1
゜65 or higher, νd = 50 or higher) only exists with a yield temperature (At) of 650°C or higher, and it can only be formed at a high pressing temperature of over 700°C. There wasn't. Table 1 shows examples of high refractive index and low dispersion types <m refractive index (nd), Atsube number (ν
d), yield concentration (^1)).
第 １ 表
精密プレス成形の公知の型材等では、プレス成形温度が
高温になると型材の酸化等の問題が起こり、面精度の保
持が難しくレンズの量産には適さない、そのためプレス
されるガラスは、可能な限り低い温度で成形されるのが
望ましい、これらの問題を解決するためとして、プレス
成形用ガラスの公開公報では、燐酸塩系ガラス（特開昭
５５−１５４３４３、特開昭５８−７９８３９、特開昭
６０ ’−１２２７４９参照）、弗ホウ酸塩ガラス（特
開昭５９−１４６９５２参照）が知られており、ガラス
形成酸化物に＃ｌ１Ｍ及びホウ酸を選んでいる。Table 1 With known mold materials for precision press molding, problems such as oxidation of the mold material occur when the press molding temperature becomes high, making it difficult to maintain surface accuracy and making it unsuitable for mass production of lenses.Therefore, the glass to be pressed is In order to solve these problems, it is desirable to form the glass at the lowest possible temperature, the publications on press-molding glasses recommend phosphate-based glasses (JP-A-55-154343, JP-A-58-79839, JP-A-58-79839, JP-A-60'-122749) and fluoroborate glass (JP-A-59-146952) are known, in which #11M and boric acid are selected as glass-forming oxides.
しかし、憐酸及びホウ酸の多量の使用は、低温化には有
利ではあるが、ガラスの化学的耐久性及び耐候性に１間
聴を生じる。また前記公開公報中に見られるフッ素の導
入は、低温化及び低分散化に有利であるが、ガラス溶融
時における安定性、プレス温度におけるフッ素の揮発に
よる型材、環境等に間開が生じやすい、鉛を含んでいる
ガラスも上記特許に見られるが、鉛を含むとフッ素同様
船の拝発物が型材に付着し面精度の保持等に間鰭が生じ
る。However, the use of large amounts of acid and boric acid, although advantageous in lowering the temperature, causes a decrease in the chemical durability and weather resistance of the glass. Furthermore, the introduction of fluorine as seen in the above-mentioned publication is advantageous for lowering the temperature and reducing dispersion, but the stability during glass melting, the volatilization of fluorine at the press temperature tends to cause gaps in the mold material, environment, etc. Glass containing lead is also seen in the above patent, but like fluorine, if lead is included, ship debris will adhere to the mold material and cause interfins to maintain surface accuracy.
従って、本発明の第１の目的は、比較的低い温度（６０
０℃以下）で精密プレスが実施される精密プレスレンズ
用光学ガラスを提供することにある。Therefore, a first object of the present invention is to achieve relatively low temperatures (60
An object of the present invention is to provide an optical glass for precision press lenses that can be precision pressed at temperatures below 0°C.
また本発明の第２の目的は、屈折率 （ｎｄ）１．６５
〜１．７０、アツベ数 （νｄ）５３．０〜５７．５と
いう高屈折率低分散の光学ガラスを提供することにある
。The second object of the present invention is to obtain a refractive index (nd) of 1.65.
The object of the present invention is to provide an optical glass having a high refractive index and low dispersion, with an Abbe number (νd) of 53.0 to 57.5.
課題を解決するための手段−
本発明者等は以上のような従来の光学ガラス及びプレス
成形用光学ガラスの諸欠点をかんがみて、種々考察研究
した結果、Ｂａ１ｔ、５１０２、Ｌ ｉａｏ、Ｌ ａｚ
ｏ ｓ及び／又は ＧｄｔＯｔ、ＣａＯ及び／又はＢａ
Ｏ１を必須とするガラス組成の光学ガラスは、高屈折率
低分散タイプの光学ガラスとほぼ同等の光学恒数を有し
、かつこれよりも低い温度においてプレス成形でき、型
材への影響も殆どないこと、及び更に上記特許のプレス
成形用光学ガラスよりも安定性、化学的耐久性、耐候性
、溶融性に優れ、従来の光学ガラスと同様に扱え、かつ
屈伏温度（Ａｔ）が低いため、プレス成形徨研削または
研磨を必要としない精密プレスレンズ用光学ガラスとし
て最適であるところのガラス組成を見出し、本発明に到
達したものである。Means for Solving the Problems - The inventors of the present invention have conducted various studies considering the drawbacks of conventional optical glasses and optical glasses for press molding as described above, and have found Balt, 5102, Liao, Laz.
o s and/or GdtOt, CaO and/or Ba
Optical glass with a glass composition that requires O1 has almost the same optical constant as a high refractive index, low dispersion type optical glass, can be press-formed at a lower temperature, and has almost no effect on the mold material. Furthermore, it has better stability, chemical durability, weather resistance, and meltability than the optical glass for press molding of the above patent, can be handled in the same way as conventional optical glass, and has a low yielding temperature (At), so it can be pressed easily. The present invention was achieved by discovering a glass composition that is optimal as an optical glass for precision press lenses that does not require grinding or polishing after forming.
すなわち、本発明を重量％で示すと
ＢｔＯｚ １０〜３５重量％（以下％で示す）Ｓ
ｉｏ ｅ ５〜３０％
Ｌ＆２０ｓ ０〜３５％
Ｇｄ２Ｏ３０〜３５％
但しＬ ａｚｏ ）＋ Ｇ ｄ２０ ｓの合量２０〜４
０％
Ｌｉ２Ｏ３〜 ８％
ＣａＱ ０〜２０％
Ｂａ０ ０〜２５％
但しＣａＯ＋ＢａＯの合量
１０〜３０％
からなる組成を有している。That is, when the present invention is expressed in weight%, BtOz 10 to 35% by weight (hereinafter expressed as %)S
io e 5-30% L&20s 0-35% Gd2O30-35% However, the total amount of L azo ) + G d20 s is 20-4
0% Li2O3~8% CaQ 0~20% Ba0 0~25% However, it has a composition consisting of a total amount of CaO+BaO of 10~30%.
本発明に係わる光学ガラスの各成分範囲を上記のように
限定した理由は次のとおりである。The reason why the range of each component of the optical glass according to the present invention is limited as described above is as follows.
Ｂ２０１は、ガラスの網目を構成する主成分であり、ガ
ラスの安定化また屈伏温度（Ａｔ）の低温度化に有効で
ある。しかし１０％より少ないと上記の効果が少なく、
３５％より多くなると化学的耐久性が悪くなる。B201 is a main component constituting the glass network, and is effective in stabilizing the glass and lowering the yielding temperature (At). However, if it is less than 10%, the above effect will be small,
If it exceeds 35%, chemical durability deteriorates.
５１０２は、Ｂ２１ｔと同様ガラスの網目を構成し、ガ
ラスの化学的耐久性の向上に有効である。しかし５％よ
り少ないと上記の効果が少なく、３０％より多くなると
溶融時の粘性が大きくなり、屈伏温度（Ａｔ）の上昇を
まねき、ざらに失透傾向が増大する。5102 constitutes a glass network like B21t, and is effective in improving the chemical durability of glass. However, if it is less than 5%, the above effect will be small, and if it is more than 30%, the viscosity during melting will increase, leading to an increase in yielding temperature (At), and the tendency to devitrify will increase.
Ｌａ２Ｏ５及びＧａｐ’ｓは、屈折率を高め低分散化す
るのに有効な成分であるが、共に３５％より多くなると
失透傾向が増大する。またＬａ２’ｓ及びＧｄ２０ｓの
合量が２０％より少ないと、所定の光学恒数が得られず
、４０％より多いとプレス成形時の温度上昇をまねくの
で、所定の範囲内とする。La2O5 and Gap's are effective components for increasing the refractive index and lowering dispersion, but when both exceed 35%, the tendency to devitrify increases. Further, if the total amount of La2's and Gd20s is less than 20%, the predetermined optical constants cannot be obtained, and if it is more than 40%, the temperature will increase during press molding, so it should be within a predetermined range.
Ｌａ２Ｏは、本発明において重要な意味を持つ成分であ
り、Ｌ ｉｚｏを必須配合成分として適量加えることに
より、ガラスの安定性を損なうことなく、著しくプレス
成形時の濃度を下げる効果を持つ。La2O is an important component in the present invention, and by adding an appropriate amount of Lizo as an essential compounding component, it has the effect of significantly lowering the concentration during press molding without impairing the stability of the glass.
しかし３％より少ないと上記効果が少なく、８％より多
いと失透傾向の増大をまねき、さらに化学的耐久性が悪
くなる。However, if it is less than 3%, the above effects will be small, and if it is more than 8%, the tendency to devitrify will increase, and chemical durability will further deteriorate.
ＣａＯは、屈折率を高め化学的耐久性を増すのに有効で
あるが、２０％より多くなると失透傾向が増大する。CaO is effective in increasing the refractive index and chemical durability, but when the content exceeds 20%, the tendency to devitrify increases.
ＢａＯは、ＣａＯと同様屈折率を高め、さらにガラスの
安定化に有効な成分である。しかし２５％より多くなる
と化学的耐久性が悪くなる。BaO, like CaO, is a component that increases the refractive index and is also effective in stabilizing glass. However, if it exceeds 25%, chemical durability deteriorates.
またＣａＯ及びＢａＯは、その合量が１０％以下である
と上記効果が得られず、３０％より多くなると失透傾向
を生じるので所定の範囲内とする。Further, if the total amount of CaO and BaO is less than 10%, the above effects cannot be obtained, and if it exceeds 30%, a tendency to devitrify occurs, so the content should be within a predetermined range.
本発明、の光学ガラスには、上記成分の他に光学性能の
調整、溶融性の改善、ガラス化範囲の拡大等のために、
本発明の目的から外れない限り、Ｚ ｒｏａ、Ｔａ２０
５＋Ｙ２０ｔ、Ｉｎ２Ｏ＊、Ｇａｔｅｓ、Ａ１２０ｚ、
ＭｇＯ１Ｎ＆２０、ＫｅＯｌＣＳ ２０％Ｓ ｒｏ。In addition to the above-mentioned components, the optical glass of the present invention includes, in order to adjust optical performance, improve meltability, expand the vitrification range, etc.
Unless it departs from the purpose of the present invention, Z roa, Ta20
5+Y20t, In2O*, Gates, A120z,
MgO1N&20, KeOlCS 20% S ro.
などを含有させることができる。etc. can be contained.
実施例
次に本発明に係わる実施例の組成（数値は重量％）、屈
折＊ （ｎ ｄ ）、アツベ数（γｄ）、屈伏温度（Ａ
ｔ〉を第２表に示す。Examples Next, the compositions (values are weight %), refraction* (n d ), Atsube number (γd), and yield temperature (A
t> is shown in Table 2.
本発明の光学ガラスは、各成分の原料として各々相当す
る酸化物、水酸化物、炭酸塩、硝酸塩等を使用し、所定
の割合で秤量し充分混合してガラス調合原料として、白
金製坩堝に投入して電気炉で１１００℃〜１３００°Ｃ
で溶融し、白金製撹拌棒にて撹拌して、清澄、均質化し
てから適当な温度に予熱した金型内に鋳込んだ後、徐冷
して作る。The optical glass of the present invention uses corresponding oxides, hydroxides, carbonates, nitrates, etc. as raw materials for each component, weighs them in predetermined proportions, thoroughly mixes them, and then puts them into a platinum crucible as raw materials for glass preparation. Pour it in and heat it to 1100℃~1300℃ in an electric furnace.
It is made by melting it, stirring it with a platinum stirring rod to clarify and homogenize it, then casting it into a mold preheated to an appropriate temperature, and then slowly cooling it.
なおガラスの着色を防ぎ、 脱泡のため小量のＡＳ２０
ｓを加えること、または工業上良く知られている脱泡成
分の小量添加は、本発明の効果に影響を与えない。In addition, a small amount of AS20 is added to prevent the glass from coloring and to remove bubbles.
The addition of s or the addition of small amounts of defoaming components well known in the industry do not affect the effectiveness of the present invention.
第２表
発明の効果
本発明によれば、屈伏温度（Ａｔ）が５５０℃以下で、
屈折率（ｎｄ）が１． ６５〜１． ７０． アツベ
数（νｄ）が５３．０〜５７．５の光学恒数を有し、失
透に対して安定であり、比較的低い温度で精密プレスで
き、プレス成形潰研削または研磨を必要としない精密プ
レスレンズ用光学ガラスが得られる。Table 2 Effects of the invention According to the invention, when the yielding temperature (At) is 550°C or less,
The refractive index (nd) is 1. 65-1. 70. It has an optical constant with an Atsubbe number (νd) of 53.0 to 57.5, is stable against devitrification, can be precision pressed at relatively low temperatures, and has precision press molding that does not require crushing, grinding or polishing. Optical glass for press lenses is obtained.
Claims (1)
ｎｄ）が１．６５〜１．７であり、アッベ数（νｄ）が
５３．０〜５７．５で、軟化点がきわめて低い高屈折率
低分散の精密プレスレンズ用光学ガラス。[Claims] B_2O_3 10 to 35% by weight (hereinafter expressed as %) SiO_2 5 to 30% La_2O_3 0 to 35% Gd_2O_3 0 to 35% However, the total amount of La_2O_3 + Gd_2O_3 is 20 to 40% Li_2O 3 to 8% CaO 0 ~20% BaO 0~25% However, the refractive index (
nd) is 1.65 to 1.7, Abbe's number (vd) is 53.0 to 57.5, and a high refractive index and low dispersion optical glass for precision press lenses has an extremely low softening point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63113152A JP2616958B2 (en) | 1988-05-10 | 1988-05-10 | Optical glass for precision press molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63113152A JP2616958B2 (en) | 1988-05-10 | 1988-05-10 | Optical glass for precision press molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01286934A true JPH01286934A (en) | 1989-11-17 |
| JP2616958B2 JP2616958B2 (en) | 1997-06-04 |
Family
ID=14604886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63113152A Expired - Fee Related JP2616958B2 (en) | 1988-05-10 | 1988-05-10 | Optical glass for precision press molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2616958B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005306627A (en) * | 2004-04-19 | 2005-11-04 | Konica Minolta Opto Inc | Optical glass and optical device |
| JP2014193794A (en) * | 2013-03-29 | 2014-10-09 | Hitachi-Ge Nuclear Energy Ltd | Neutron absorption glass, neutron absorption material and management method of molten fuel using the same, removing method of molten fuel and stopping method of atomic reactor |
| WO2016068124A1 (en) * | 2014-10-27 | 2016-05-06 | Hoya株式会社 | Optical glass, optical element and optical glass material |
| JP2016084257A (en) * | 2014-10-27 | 2016-05-19 | Hoya株式会社 | Optical glass, optical element and optical glass material |
| JP2016124775A (en) * | 2015-01-07 | 2016-07-11 | Hoya株式会社 | Optical glass, optical element and optical glass material |
| CN108341593A (en) * | 2017-12-08 | 2018-07-31 | 成都光明光电股份有限公司 | Optical glass |
| JP2019199403A (en) * | 2019-08-20 | 2019-11-21 | Hoya株式会社 | Optical glass, optical element and optical glass material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55154343A (en) * | 1979-05-18 | 1980-12-01 | Philips Nv | Precisely pressed glass product* glass and manufacture of glass |
| JPS58172241A (en) * | 1982-01-22 | 1983-10-11 | シヨツト・グラスヴエルケ | Optical glass with refractive index 1.60-1.69 and abbe's number more than 54, particularly low density and good chemical stability |
| JPS62123040A (en) * | 1985-11-22 | 1987-06-04 | Sumita Kogaku Glass Seizosho:Kk | Optical glass |
-
1988
- 1988-05-10 JP JP63113152A patent/JP2616958B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55154343A (en) * | 1979-05-18 | 1980-12-01 | Philips Nv | Precisely pressed glass product* glass and manufacture of glass |
| JPS58172241A (en) * | 1982-01-22 | 1983-10-11 | シヨツト・グラスヴエルケ | Optical glass with refractive index 1.60-1.69 and abbe's number more than 54, particularly low density and good chemical stability |
| JPS62123040A (en) * | 1985-11-22 | 1987-06-04 | Sumita Kogaku Glass Seizosho:Kk | Optical glass |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005306627A (en) * | 2004-04-19 | 2005-11-04 | Konica Minolta Opto Inc | Optical glass and optical device |
| JP4655502B2 (en) * | 2004-04-19 | 2011-03-23 | コニカミノルタオプト株式会社 | Optical glass and optical element |
| JP2014193794A (en) * | 2013-03-29 | 2014-10-09 | Hitachi-Ge Nuclear Energy Ltd | Neutron absorption glass, neutron absorption material and management method of molten fuel using the same, removing method of molten fuel and stopping method of atomic reactor |
| WO2016068124A1 (en) * | 2014-10-27 | 2016-05-06 | Hoya株式会社 | Optical glass, optical element and optical glass material |
| JP2016084257A (en) * | 2014-10-27 | 2016-05-19 | Hoya株式会社 | Optical glass, optical element and optical glass material |
| JP2016124775A (en) * | 2015-01-07 | 2016-07-11 | Hoya株式会社 | Optical glass, optical element and optical glass material |
| CN108341593A (en) * | 2017-12-08 | 2018-07-31 | 成都光明光电股份有限公司 | Optical glass |
| JP2019199403A (en) * | 2019-08-20 | 2019-11-21 | Hoya株式会社 | Optical glass, optical element and optical glass material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2616958B2 (en) | 1997-06-04 |
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