JPH01270536A - Optical glass for low-temperature mold forming - Google Patents
Optical glass for low-temperature mold formingInfo
- Publication number
- JPH01270536A JPH01270536A JP9533188A JP9533188A JPH01270536A JP H01270536 A JPH01270536 A JP H01270536A JP 9533188 A JP9533188 A JP 9533188A JP 9533188 A JP9533188 A JP 9533188A JP H01270536 A JPH01270536 A JP H01270536A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- low
- softening point
- optical glass
- water resistance
- 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
- 239000005304 optical glass Substances 0.000 title claims abstract description 15
- 239000011521 glass Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 8
- 239000011737 fluorine Substances 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052681 coesite Inorganic materials 0.000 abstract description 6
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 6
- 239000000377 silicon dioxide Substances 0.000 abstract description 6
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 6
- 229910052682 stishovite Inorganic materials 0.000 abstract description 6
- 229910052905 tridymite Inorganic materials 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 4
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052593 corundum Inorganic materials 0.000 abstract description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 238000002845 discoloration Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- GOLCXWYRSKYTSP-UHFFFAOYSA-N Arsenious Acid Chemical compound O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 239000008395 clarifying agent Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- CAOSCCRYLYQBES-UHFFFAOYSA-N 2-[[[4-hydroxy-2-oxo-1-(phenylmethyl)-3-quinolinyl]-oxomethyl]amino]acetic acid Chemical compound O=C1C(C(=O)NCC(=O)O)=C(O)C2=CC=CC=C2N1CC1=CC=CC=C1 CAOSCCRYLYQBES-UHFFFAOYSA-N 0.000 description 1
- 238000007088 Archimedes method Methods 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000007774 longterm Effects 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
- 239000005365 phosphate glass Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000002834 transmittance 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
- C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
-
- 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
- C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
- C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
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】
［産業上の利用性！ｌ”ｆ］
本発明は温度、圧力の作用によりモールド成型され、研
磨加工を施すことなく、球面、非球面レンスを含む光学
部品として利用されるガラスに関するものである。[Detailed description of the invention] [Industrial applicability! l"f] The present invention relates to a glass that is molded by the action of temperature and pressure and is used as an optical component including spherical and aspherical lenses without polishing.
［従来技術］
モール１〜成型とは、温度、圧力の作用下において正確
な精度の表面形状をもつ金型表面の複製をガラス表面上
に精密に再現し、他の仕」二は研磨加工工程なしに直接
光学部品としての用途に適用させることを可能とする成
型法全般を意味する。この成型法の特徴は、従来より行
われている高温下のプレスではなく、ガラスの粘度で約
１０〜１０角でイスに相当する温度での精密プレスを行
う点である９モール１〜成型に使用されるガラスには金
型との化学的反応性か少なく、しかも高温において金型
の劣化か進ます、大量のプレスが可能となるように軟化
点の低いことか要求される。又、光学ガラスは、光学部
品の組み込まれた機構全体の重量か軽くてき他の構造部
品への負担か小さくなるので、重量が軽い方が好ましく
、そのためには密度か小さい方がよい。さらにガラスの
耐水性はガラス表面に発生ずる白やけのおこりやずさを
示ず尺度であるか、光学ガラスでは光の透過率か重要な
ことから白やけかおこらす耐水性に優れていることか望
まれる。[Prior art] Molding 1 - Molding is a process in which a replica of the mold surface with an accurate surface shape is precisely reproduced on the glass surface under the action of temperature and pressure, and other processes are performed in the polishing process. Refers to all molding methods that can be directly applied to optical parts without any molding. The feature of this molding method is that instead of pressing at high temperatures as conventionally done, precision pressing is performed at a temperature equivalent to a chair with a viscosity of about 10 to 10 squares. The glass used must have a low softening point so that it can be pressed in large quantities because it has little chemical reactivity with the mold, and the mold deteriorates at high temperatures. Further, optical glass is preferable to be light in weight because it reduces the weight of the entire mechanism in which the optical parts are incorporated and reduces the burden on other structural parts, and for this purpose, it is better to have a low density. Furthermore, the water resistance of glass is a measure that does not indicate the occurrence or severity of white discoloration that occurs on the glass surface, and for optical glass, the transmittance of light is important, so it is important that it has excellent water resistance that does not cause white discoloration. or desired.
従来よりこのようなモール１〜成型用光学ガラスとして
例えは特開昭６０−１２２７４９号、特開昭６ｌ−１１
１９３６号にはリン酸塩ガラスか、また特開昭５９−８
３９５９号にはアルミノフロオロポウ珪酸鉛ガラスか提
案されている。Conventionally, optical glasses for molding 1 to molding have been used, for example, in JP-A-60-122749 and JP-A-6L-11.
No. 1936 includes phosphate glass, and JP-A-59-8
No. 3959 proposes an aluminofluoropolysilicate glass.
［発明か解決しようとする問題点］
先記したようにモールド成型用として提案されているガ
ラスは主にリン酸塩光学ガラスやアルミノフルオロホウ
エ圭酸釦カシスてあり、これらのガラスは低温プレスか
可能であるか、一方、リン、フッ素を含有するため耐水
性か悪く、白やけか発生しゃずいという問題かある。特
にフッ素は揮発性であるため金型の浸食を促進しやすく
、且つ人体に有害であるため好ましくない。また低温プ
レスを容易にするため多量の釦を含有して軟化点を低く
したガラスもあるか、紹を多量に含むと密度か大きくな
り、先記したように重量の大きくなる問題かある。さら
にプレスレ〉・ス用として実用化され、波長５８７．６
ｎｍでの屈折率か１．６８１！９であるＳＦ８と一般に
呼はれている光学ガラスも存在するか、このガラスは軟
化点か比較的高く、約５６０℃である。モール１−成型
用として使用する場合、金型への負担か少しでも低い事
か望ましくガラスの軟化点は低い方か好ましい。すなわ
ち具体的には５４０℃以下であることか必要である。[Problem to be solved by the invention] As mentioned above, the glasses proposed for molding are mainly phosphate optical glass and aluminofluorofluorocarbon glass, and these glasses can be processed by cold pressing. On the other hand, since it contains phosphorus and fluorine, it has poor water resistance and is prone to white discoloration. In particular, fluorine is undesirable because it is volatile and tends to accelerate erosion of the mold, and is harmful to the human body. There are also glasses that contain a large amount of button to lower the softening point to facilitate low-temperature pressing, or if a large amount of glass is included, the density increases and, as mentioned above, there is the problem of increased weight. Furthermore, it was put into practical use for press racing, and the wavelength was 587.6.
There is also an optical glass commonly referred to as SF8, which has a refractive index in nm of 1.681!9, and this glass has a relatively high softening point, about 560°C. Mold 1 - When used for molding, it is desirable that the burden on the mold be as low as possible, and it is preferable that the softening point of the glass be as low as possible. That is, specifically, it is necessary that the temperature be 540°C or lower.
−，，５−−
以−４二のように現在モールド成型用として提案あるい
は使用されているガラスは実用面において最適な必要特
性を全て満足しているとは言い難い。-, 5-- As mentioned in -42 below, it is difficult to say that the glasses currently proposed or used for molding do not satisfy all of the optimum and necessary properties in practical terms.
本発明は低温でもモールド成型か容易であるようにガラ
スの軟化点か５４０℃以下であり、また重量を小さくす
るため密度か５ｇ／ｃｍ 以下で、波長５８９ｊ ｎ
ｍにおける屈折率が１．６５〜１．７５’ｉ？、且つ耐
水性に優れたガラスを提供することを目的とする。In the present invention, the softening point of the glass is 540°C or less so that it can be easily molded even at low temperatures, the density is 5g/cm or less to reduce weight, and the wavelength is 589jn.
The refractive index at m is 1.65 to 1.75'i? The purpose of the present invention is to provide a glass with excellent water resistance.
［問題を解決するだめの手段］
本発明者等は、ＳｉＯ２とＰｈＯの２成分を基本組成と
してＬｉ２Ｏ，Ｎａ２Ｏ，に２Ｏ等のＲ２Ｏを添加する
ことによって軟化点及び密度が低下し、しかも耐水性に
優れたガラスが得られ、そしてさらにＢ２Ｏ３を添加す
ることでその効果かより促進されることを見い出した。[Means to Solve the Problem] The present inventors have found that by adding R2O such as 2O to Li2O, Na2O, and the like with two basic components of SiO2 and PhO, the softening point and density are lowered, and water resistance is improved. It has been found that a glass with excellent properties can be obtained, and that this effect can be further promoted by adding B2O3.
一般にガラス中のＲ２Ｏの含有量を増加させてゆくと軟
化点及び密度は低下するか、一方耐水性は劣化する。そ
のため本発明ではＲ２Ｏの含有量を１５重量％以内に抑
え、好ましくはＬｉ２Ｏ，Ｎａ２Ｏ，に２Ｏの少なくと
も２種を用い、１種の重量％がＲ２Ｏの総重量の８割以
上にならないようにすることによってアルカリ混合効果
を生せしめ耐水性の劣化を妨けることか判明した。又、
Ｂ２Ｏ３を含有させると軟化点及び密度はさらに低下す
るが、多量含有すると耐水性の著しい劣化をまねくはか
りでなく、軟化点を低下させる効果も小さくなるためそ
の含有量を１１重量％以内に抑えることか必要である。Generally, as the content of R2O in the glass increases, the softening point and density decrease, while the water resistance deteriorates. Therefore, in the present invention, the content of R2O is suppressed to within 15% by weight, and preferably at least two types of 2O are used in Li2O, Na2O, and the weight% of one type is not more than 80% of the total weight of R2O. It was found that this produced an alkali mixing effect and prevented the deterioration of water resistance. or,
If B2O3 is included, the softening point and density will further decrease, but if it is included in a large amount, it will lead to a significant deterioration of water resistance, and the effect of lowering the softening point will be small, so the content should be kept within 11% by weight. or is necessary.
さらに耐水性を良好に改善するために必要に応じて八１
□０３を添加することができる。81 as necessary to further improve water resistance.
□03 can be added.
」１記の成分以外にも光学部品用途に利用されるガラス
は種々の光学恒数か要求され、所望の光学恒数をもつガ
ラスを得るためＣａＯ，ＢａＯ，ＭｇＯ，ＺｎＯ等のＲ
″０あるいはＬａ２Ｏ３を添加することができ、脱泡清
澄剤として５ｂ２Ｏｑや人５２Ｏ３を添加することがで
きる。In addition to the ingredients listed in 1 above, glasses used for optical parts are required to have various optical constants, and in order to obtain glasses with desired optical constants, R of CaO, BaO, MgO, ZnO, etc.
``0'' or La2O3 can be added, and 5b2Oq or 52O3 can be added as a defoaming and clarifying agent.
すなわち本発明の低温モールド成型用光学ガラスは、酸
化物重量％で
Ｓｉ０□ ２６〜４０Ｐｂ０
４５〜６５
Ｒ２Ｏ（Ｒ＝Ｌｉ、Ｎａ、Ｋ） ２〜１５８２Ｏ
３ ０〜１１ＡＩ２Ｏ３
、 ０７−１０Ｒ’Ｏ（Ｒ’＝Ｃａ
、Ｂａ、Ｍｇ、Ｚｎ） （１−７Ｌａ２Ｏ３
ｏ〜 ５からなり、本質的にフッ素
を含有しないことを特徴とし、好ましくは
ＳｉＯ２ ３０〜３６ＰｂＯ４９〜６
４
Ｒ２Ｏ（Ｒ；Ｌｉ、Ｎａ、Ｋ） ５〜１４Ｂ２Ｏ
３ｏ−′−１゜
ＡＩ□０３ ０〜７
Ｒ’Ｏ（Ｒ”Ｃａ、Ｂａ、Ｍｇ、Ｚｎ） （１−６Ｌ
ａ２Ｏ３ ｏ〜４からなり、本質的
にフッ素を含有しないことを特徴とし、さらに好ましく
は
ＳｉＯ２３０〜３６
ＰｂＯ５０〜６３
Ｒ２Ｏ（Ｒ１，ｉ、Ｎａ、Ｋ） ５〜１４８２Ｏ
３０〜９
Ａ１□０３ ０．５
Ｒ’Ｏ（Ｒ’＝Ｃａ、Ｂａ、Ｍｇ、Ｚｎ） ０〜５
１、ａ２Ｏ３ Ｑ〜
４からなり、本質的にフッ素を含有しないことを特徴と
するもので、このガラスは軟化点が５４０℃以下てあり
、密度が５ｇ／ｃ＋ｎ 以下、波長５８９．３ ｎｍ
における屈折率が１．６５〜１．７５で、且つ耐水性に
も優れている。That is, the optical glass for low-temperature molding of the present invention has Si0□26-40Pb0 in oxide weight%.
45-65 R2O (R=Li, Na, K) 2-1582O
3 0~11AI2O3
, 07-10R'O(R'=Ca
, Ba, Mg, Zn) (1-7La2O3
SiO2 30-36PbO49-6, preferably SiO230-36PbO49-6
4 R2O (R; Li, Na, K) 5-14B2O
3o-'-1゜AI□03 0~7 R'O(R"Ca, Ba, Mg, Zn) (1-6L
It consists of a2O3 o~4, is characterized by essentially not containing fluorine, and is more preferably SiO230~36 PbO50~63 R2O(R1,i, Na, K) 5~1482O
30~9 A1□03 0.5 R'O (R'=Ca, Ba, Mg, Zn) 0~5
1, a2O3 Q~
4, and is characterized by essentially not containing fluorine.This glass has a softening point of 540°C or less, a density of 5g/c+n or less, and a wavelength of 589.3 nm.
It has a refractive index of 1.65 to 1.75 and excellent water resistance.
本発明の低温モールド成型用光学ガラスの組成範囲を上
記のごとく限定したのは以下の理由による。The reason why the composition range of the optical glass for low-temperature molding of the present invention is limited as described above is as follows.
ＳｉＯ２はガラス形成酸化物となる必須酸化物であるが
、２６重量％より少ない場合は化学的耐久性が著しく劣
化し、４０重量％より多い場合は軟化点が５４０℃以上
になりモールド成型に不向きとなる。SiO2 is an essential oxide that becomes a glass-forming oxide, but if it is less than 26% by weight, the chemical durability will deteriorate significantly, and if it is more than 40% by weight, the softening point will be 540°C or higher, making it unsuitable for mold forming. becomes.
ＰｂＯは高屈折率成分であると同時に軟化点を５４０℃
以下に保持するための必須酸化物であるが、４５重量％
より少ない場合は軟化点の低温保持が困難であり、６５
重重量より多い場合は密度が５ｇ／ｃｍ以上となるため
ガラスの重量が大きくなり好ましくない。PbO is a high refractive index component and has a softening point of 540°C.
Essential oxides to keep below 45% by weight
If the amount is less than 65, it is difficult to maintain the softening point at a low temperature.
If it exceeds the weight, the density becomes 5 g/cm or more, which increases the weight of the glass, which is not preferable.
Ｒ２Ｏは軟化点及び密度を低下させる効果があるが、２
重量％より少ない場合は上記効果が得られず、１５重量
％より多い場合は耐水性の著しい低下をまねく。Ｒ２Ｏ
については好ましくはＬｉ２Ｏ，Ｎａ２Ｏ。R2O has the effect of lowering the softening point and density, but 2
When the amount is less than 15% by weight, the above effects cannot be obtained, and when it is more than 15% by weight, water resistance is significantly reduced. R2O
Preferred are Li2O and Na2O.
Ｋ２Ｏの少なくとも２種を用い、１種の重量％がＲ２Ｏ
の総重量の８割以上にならないようにする。すなわちこ
れによってアルカリ混合効果を生せしめ耐水性の劣化を
防ぐことができる。At least two types of K2O are used, and the weight percent of one type is R2O.
Make sure that it does not exceed 80% of the total weight. That is, this can produce an alkali mixing effect and prevent deterioration of water resistance.
Ｂ２Ｏ３は、融剤として作用しＲ２Ｏと共に軟化点及び
密度を下げる効果があるが、１１重量％より多い場合は
耐水性が著しく劣化すると共に軟化点を低下させる効果
も小さくなる。B2O3 acts as a fluxing agent and has the effect of lowering the softening point and density together with R2O, but if it exceeds 11% by weight, the water resistance is significantly deteriorated and the effect of lowering the softening point is also reduced.
Ａｌ２Ｏ３は耐水性を良好にする効果があるが、１０重
量％より多い場合は耐失透性が劣化するため溶融が困難
になると共に軟化点が高くなる。Al2O3 has the effect of improving water resistance, but if it exceeds 10% by weight, the devitrification resistance deteriorates, making melting difficult and increasing the softening point.
Ｒ’Ｏはガラスの溶融性及び化学的耐久性を向上させ、
屈折率を調整するのに効果があるが、７重量％より多い
場合は軟化点が著しく上昇するため好ましくない。R'O improves the meltability and chemical durability of glass,
Although it is effective in adjusting the refractive index, if it exceeds 7% by weight, the softening point increases significantly, which is not preferable.
Ｌａ２Ｏ３は屈折率を調整すると共に密度を低下さぜろ
のに効果か′１）るか、５重量％よｌ′）多い場合はガ
ラスの初期溶融性か悪くなるため好ましくない。Although La2O3 is effective in adjusting the refractive index and lowering the density, it is not preferable that the amount exceeds 5% by weight because the initial melting properties of the glass deteriorate.
また本発明においては、」−記成分以外にも脱泡清澄剤
として５１１２Ｏ３やＡｓ２Ｏ３を各々５％まで添加す
ることか可能である。Furthermore, in the present invention, it is possible to add up to 5% each of 5112O3 and As2O3 as defoaming and clarifying agents in addition to the components listed in "-".
［実施例］ 以丁実施例及び比較例に基ついて本発明を説明する。[Example] The present invention will be explained based on Examples and Comparative Examples.
Ｎｏ、 ］〜８の試４”＋は本発明の実施例、ＮＯ，９
及び１０の試料は比較例を示す。No. ] ~ 8 trials 4”+ are examples of the present invention, No. 9
and 10 samples represent comparative examples.
以 下 余 白 −１，］、 −− 試料Ｎｏ、 １〜１０のガラスは次のように調製した。Below, remaining white -1,], -- Glass samples No. 1 to 10 were prepared as follows.
まず各々の試料ガラス組成となるように調合した原料ハ
ツチを白金るつぼに入れ１２Ｏ０℃で２時間溶融した。First, raw material hatches prepared to have the composition of each sample glass were placed in a platinum crucible and melted at 120°C for 2 hours.
均質なガラスを得るために途中撹拌棒て５分間撹拌を行
い、脱泡後金型に流し出して試料片を作成した。In order to obtain a homogeneous glass, the glass was stirred for 5 minutes using a stirring rod, and after defoaming, it was poured into a mold to prepare a sample piece.
尚、表中の密度は周知のアルキメデス法によって測定し
、屈折率はアラへ屈折率測定装置を用いて５ｇ９．３ｎ
ｍにおける波長で測定した。The density in the table is measured by the well-known Archimedes method, and the refractive index is 5g9.3n using a refractive index measuring device.
The wavelength was measured at m.
また耐水性は半導体等の電子工学用途における耐水性試
験方法として知られているプレッシャークッカーテス１
〜によるものである。このプレッシャークツカーテスト
は、１２１℃、１００％ＲＨ１５０時間の条件下におい
て２ＯＸ ＩＯＸ ２ ｍｍの大きさの試験体表面のや
けの有無を１００倍の顕微鏡観察により判定する試験方
法であり、この試験方法は通常の恒温恒温槽で行う長期
保管環境試験より苛酷な条件下に試料を保持するために
ガラスの耐水性の優劣か明確にあられれ信頼性のある評
価かてきる。Water resistance is also measured using the Pressure Cooker Test 1, which is known as a water resistance test method for electronic engineering applications such as semiconductors.
It is due to. This pressure cutter test is a test method in which the presence or absence of burns on the surface of a 2OX IOX 2 mm specimen is determined by microscopic observation at 100x magnification under conditions of 121°C, 100% RH, and 150 hours. Since the test holds the sample under harsher conditions than the long-term storage environment test conducted in a regular constant-temperature bath, it is possible to clearly evaluate the water resistance of the glass and provide a reliable evaluation.
本発明の実施品であるＮＯ，１〜８の各試料と比較例で
あるＮｏ、 ９の試料とを比較すると軟化点、密度、屈
折率においてはほとんど同し値を示しているか、耐水性
において実施品は白やけかほとんど観察されず良好であ
るのに対し、一方比較例である試料ＮＯ，９はＳｉＯ２
が少なく、且つＦを含有するため、また試料Ｎｏ、ｌＯ
もＳｉＯ□が少ないため白やけが目立って観察され不良
であった。Comparing samples Nos. 1 to 8, which are products of the present invention, and samples No. 9, which are comparative examples, they show almost the same values in softening point, density, and refractive index, and they show almost the same values in terms of softening point, density, and refractive index. The tested product is in good condition with almost no white discoloration observed, whereas the comparative example, sample No. 9, is SiO2
Because it has a small amount of F and contains F, sample No.
Also, due to the small amount of SiO□, noticeable white discoloration was observed and was poor.
［発明の効果］
以」−のように本発明のガラスは軟化点が５４０℃以下
、密度が５ｇ／ｃｍ以下て波長５８９．３ｎｍにおける
屈折率が１，６５〜１．７５で、且つ耐水性に優れてい
るなめ良好な透過性及び光学品質を有する低温モールド
成型用光学ガラスとして好適である。[Effects of the Invention] As described below, the glass of the present invention has a softening point of 540°C or less, a density of 5 g/cm or less, a refractive index of 1.65 to 1.75 at a wavelength of 589.3 nm, and water resistance. It is suitable as an optical glass for low-temperature molding because it has excellent transparency and optical quality.
特許出願人 日本電気硝子株式会社 代表者 岸 １）清 作Patent applicant: Nippon Electric Glass Co., Ltd. Representative Kishi 1) Kiyoshi Saku
Claims (4)
ールド成型が容易であるようにガラスの軟化点が５４０
℃以下であり、密度が５ｇ／ｃｍ＾３以下、波長５８９
．３ｎｍにおける屈折率が１．６５〜１．７５で、且つ
耐水性に優れており、酸化物重量％で ＳｉＯ＿２２６〜４０ ＰｂＯ４５〜６５ Ｒ＿２Ｏ（Ｒ＝Ｌｉ、Ｎａ、Ｋ）２〜１５ Ｂ＿２Ｏ＿３０〜１１ Ａｌ＿２Ｏ＿３０〜１０ Ｒ’Ｏ（Ｒ’＝Ｃａ、Ｂａ、Ｍｇ、Ｚｎ）０〜７Ｌａ＿
２Ｏ＿３０〜５ からなり、本質的にフッ素を含有しないことを特徴とす
る低温モールド成型用光学ガラス。(1) The softening point of glass is 540 so that it is easy to mold optical parts including spherical and aspherical lenses at low temperatures.
℃ or less, density is 5g/cm^3 or less, wavelength 589
．． It has a refractive index of 1.65 to 1.75 at 3 nm and excellent water resistance, and the oxide weight% is SiO_226-40 PbO45-65 R_2O (R=Li, Na, K) 2-15 B_2O_30-11 Al_2O_30 ~10 R'O (R'=Ca, Ba, Mg, Zn) 0~7La_
An optical glass for low-temperature molding, characterized in that it consists of 2O_30~5 and essentially does not contain fluorine.
２Ｏ＿３０〜４ からなり、本質的にフッ素を含有しないことを特徴とす
る特許請求の範囲第１項記載の低温モールド成型用光学
ガラス。(2) SiO_230-36 PbO49-64 R_2O (R=Li, Na, K) 5-14 B_2O_30-10 Al_2O_30-7 R'O (R'=Ca, Ba, Mg, Zn) 0- 6La_
The optical glass for low-temperature molding according to claim 1, characterized in that it consists of 2O_30-4 and essentially does not contain fluorine.
２Ｏ＿３０〜４ からなり、本質的にフッ素を含有しないことを特徴とす
る特許請求の範囲第１項記載の低温モールド成型用光学
ガラス。(3) SiO_230~36 PbO50~63 R_2O (R=Li, Na, K) 5~14 B_2O_30~9 Al_2O_30~5 R'O (R'=Ca, Ba, Mg, Zn) 0~ 5La_
The optical glass for low-temperature molding according to claim 1, characterized in that it consists of 2O_30-4 and essentially does not contain fluorine.
の少なくとも２種からなり、１種の重量％がＲ＿２Ｏの
総重量の８割以上にならないことを特徴とする特許請求
の範囲第１、２、３項記載の低温モールド成型用光学ガ
ラス。(4) R_2O is Li_2O, Na_2O, K_2O
The optical glass for low-temperature molding according to claims 1, 2, and 3, characterized in that the weight percentage of one type does not exceed 80% of the total weight of R_2O.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9533188A JPH01270536A (en) | 1988-04-18 | 1988-04-18 | Optical glass for low-temperature mold forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9533188A JPH01270536A (en) | 1988-04-18 | 1988-04-18 | Optical glass for low-temperature mold forming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01270536A true JPH01270536A (en) | 1989-10-27 |
Family
ID=14134738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9533188A Pending JPH01270536A (en) | 1988-04-18 | 1988-04-18 | Optical glass for low-temperature mold forming |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01270536A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH042628A (en) * | 1990-04-19 | 1992-01-07 | Alps Electric Co Ltd | Optical glass for pressed lens |
| DE10202427A1 (en) * | 2002-01-22 | 2003-08-07 | Schott Glas | Glass used for optical applications contains a specified amount of lithium oxide and has specified refractive index and Abbe number |
-
1988
- 1988-04-18 JP JP9533188A patent/JPH01270536A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH042628A (en) * | 1990-04-19 | 1992-01-07 | Alps Electric Co Ltd | Optical glass for pressed lens |
| DE10202427A1 (en) * | 2002-01-22 | 2003-08-07 | Schott Glas | Glass used for optical applications contains a specified amount of lithium oxide and has specified refractive index and Abbe number |
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