JP7398185B2 - optical glass lens - Google Patents
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- JP7398185B2 JP7398185B2 JP2017218044A JP2017218044A JP7398185B2 JP 7398185 B2 JP7398185 B2 JP 7398185B2 JP 2017218044 A JP2017218044 A JP 2017218044A JP 2017218044 A JP2017218044 A JP 2017218044A JP 7398185 B2 JP7398185 B2 JP 7398185B2
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- 239000005304 optical glass Substances 0.000 title claims description 49
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 31
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 23
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 229910018068 Li 2 O Inorganic materials 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 7
- 229910006404 SnO 2 Inorganic materials 0.000 claims description 6
- 229910021193 La 2 O 3 Inorganic materials 0.000 claims description 5
- 239000003566 sealing material Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 2
- 239000011521 glass Substances 0.000 description 30
- 230000000694 effects Effects 0.000 description 22
- 238000002844 melting Methods 0.000 description 11
- 230000008018 melting Effects 0.000 description 11
- 238000004031 devitrification Methods 0.000 description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 4
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 4
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- NOTVAPJNGZMVSD-UHFFFAOYSA-N potassium monoxide Inorganic materials [K]O[K] NOTVAPJNGZMVSD-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000006060 molten glass Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 206010040925 Skin striae Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000008395 clarifying agent Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Description
本発明は光学ガラスレンズに関するものである。 The present invention relates to an optical glass lens.
ＣＤ、ＭＤ、ＤＶＤその他各種光ディスクシステムの光ピックアップレンズ、デジタルカメラ、ビデオカメラ、カメラ付き携帯電話機等の撮像用レンズ、光通信に使用される送受信用レンズ等の用途では、屈折率ｎｄが１．４８～１．５５の中屈折率レンズが必要である。 In applications such as optical pickup lenses for CDs, MDs, DVDs, and other various optical disk systems, imaging lenses for digital cameras, video cameras, camera-equipped mobile phones, etc., and transmitting/receiving lenses used for optical communications, the refractive index nd is 1. A medium refractive index lens of 48 to 1.55 is required.
特許文献１には中屈折率を有するガラス組成が開示されている。 Patent Document 1 discloses a glass composition having a medium refractive index.
特許文献１に開示されているガラス組成は、耐水性、耐薬品性、耐熱性等の耐久性が低いという問題がある。 The glass composition disclosed in Patent Document 1 has a problem of low durability such as water resistance, chemical resistance, and heat resistance.
本発明の目的は上記課題に鑑み、耐久性に優れた中屈折率（具体的には屈折率ｎｄが１．４８～１．５５）の光学ガラスレンズを提供することである。 In view of the above problems, an object of the present invention is to provide an optical glass lens with a medium refractive index (specifically, a refractive index nd of 1.48 to 1.55) and excellent durability.
本発明の光学ガラスレンズは、質量％で、ＳｉＯ２ ５０～７０％、Ｂ２Ｏ３ １～１８％、Ａｌ２Ｏ３ ０～１５％、ＺｎＯ ０～２０％、ＣａＯ ０．１～１０％、Ｎａ２Ｏ＋Ｋ２Ｏ ０．１～１８％、Ｓｂ２Ｏ３ ０～１％、ＳｎＯ２ ０～１％を含有することを特徴とする。光学ガラスの耐久性（耐水性、耐薬品性、耐熱性等）には、Ｂ２Ｏ３とアルカリ成分の含有量が影響を与える。本発明ではＢ２Ｏ３とアルカリ成分の含有量を各々１８質量％以下に規制することにより優れた耐久性を達成している。 The optical glass lens of the present invention contains, in mass %, SiO 2 50-70%, B 2 O 3 1-18%, Al 2 O 3 0-15%, ZnO 0-20%, CaO 0.1-10%. , Na 2 O + K 2 O 0.1-18%, Sb 2 O 3 0-1%, and SnO 2 0-1%. The content of B 2 O 3 and alkali components influences the durability (water resistance, chemical resistance, heat resistance, etc.) of optical glass. In the present invention, excellent durability is achieved by regulating the contents of B 2 O 3 and alkali components to 18% by mass or less.
本発明の光学ガラスレンズは、さらに、質量％で、ＢａＯ ０～１５％、ＳｒＯ ０～１５％、ＭｇＯ ０～１５％、ＢａＯ＋ＳｒＯ＋ＭｇＯ ０～２０％を含有することが好ましい。ここで、「ＢａＯ＋ＳｒＯ＋ＭｇＯ」とは、ＢａＯ、ＳｒＯ及びＭｇＯの含有量の合量を意味する。 The optical glass lens of the present invention preferably further contains BaO 0 to 15%, SrO 0 to 15%, MgO 0 to 15%, and BaO+SrO+MgO 0 to 20% in mass %. Here, "BaO+SrO+MgO" means the total content of BaO, SrO, and MgO.
本発明の光学ガラスレンズは、質量％で、Ｎａ２Ｏ ０．１～１８％、Ｋ２Ｏ ０～５％を含有することが好ましい。 The optical glass lens of the present invention preferably contains 0.1 to 18% of Na 2 O and 0 to 5% of K 2 O in mass %.
本発明の光学ガラスレンズは、さらに、質量％で、ＺｎＯ＋ＣａＯ ０．１～３０％を含有することが好ましい。ここで、「ＺｎＯ＋ＣａＯ」とは、ＺｎＯ及びＣａＯの含有量の合量を意味する。 The optical glass lens of the present invention preferably further contains 0.1 to 30% by mass of ZnO+CaO. Here, "ZnO+CaO" means the total content of ZnO and CaO.
本発明の光学ガラスレンズは、質量％で、ＺｒＯ２ ０～５％、Ｌａ２Ｏ３ ０～１０％、Ｇｄ２Ｏ３ ０～１５％を含有することが好ましい。 The optical glass lens of the present invention preferably contains ZrO 2 0-5%, La 2 O 3 0-10%, and Gd 2 O 3 0-15% in mass %.
本発明の光学ガラスレンズは、屈折率（ｎｄ）が１．４８～１．５５であることが好ましい。なお、「ｎｄ」は、ｄ線における屈折率である。 The optical glass lens of the present invention preferably has a refractive index (nd) of 1.48 to 1.55. Note that "nd" is the refractive index at the d-line.
本発明の光学ガラスレンズは、屈折率（ｎ１３１０）が１．４６～１．５３であることが好ましい。なお、「ｎ１３１０」は、１３１０ｎｍにおける屈折率である。 The optical glass lens of the present invention preferably has a refractive index (n1310) of 1.46 to 1.53. Note that "n1310" is the refractive index at 1310 nm.
本発明の光学ガラスレンズは、ＪＯＧＩＳに基づく耐水性が２級以上であることが好ましい。 The optical glass lens of the present invention preferably has water resistance of grade 2 or higher based on JOGIS.
本発明の光学ガラスレンズは、液相粘度が１０５．０ｄＰａ・ｓ以上であることが好ましい。 The optical glass lens of the present invention preferably has a liquidus viscosity of 10 5.0 dPa·s or more.
本発明の光学ガラスレンズは、研磨痕を有していてもよい。 The optical glass lens of the present invention may have polishing marks.
本発明の光学ガラスレンズは、プレス成型用であることが好ましい。 The optical glass lens of the present invention is preferably for press molding.
本発明のレンズキャップは、円筒形状の側壁部と、側壁部の先端に設けられ且つその中心部にレンズ保持孔を有する端壁部とから構成された金属製シェルと、金属製シェルのレンズ保持孔に封着固定された上記の光学ガラスレンズと、金属製のシェルのレンズ保持孔に上記の光学ガラスレンズを固定する封着材料とを備えていることを特徴とする。 The lens cap of the present invention includes a metal shell including a cylindrical side wall portion, an end wall portion provided at the tip of the side wall portion and having a lens holding hole in the center thereof, and a lens holding hole in the metal shell. It is characterized by comprising the above-mentioned optical glass lens sealed and fixed in the hole, and a sealing material for fixing the above-mentioned optical glass lens in the lens holding hole of the metal shell.
本発明によれば、耐久性に優れた中屈折率（具体的には屈折率ｎｄが１．４８～１．５５）の光学ガラスレンズを提供することができる。 According to the present invention, it is possible to provide an optical glass lens with excellent durability and a medium refractive index (specifically, a refractive index nd of 1.48 to 1.55).
本発明の光学ガラスレンズは、質量％で、ＳｉＯ２ ５０～７０％、Ｂ２Ｏ３ １～１８％、Ａｌ２Ｏ３ ０～１５％、ＺｎＯ ０～２０％、ＣａＯ ０．１～１０％、Ｎａ２Ｏ＋Ｋ２Ｏ ０．１～１８％、Ｓｂ２Ｏ３ ０～１％、ＳｎＯ２ ０～１％を含有する。以下に、各成分の含有量を上記のように特定した理由を詳述する。なお、特に断りが無い場合、以下の「％」は「質量％」を意味する。 The optical glass lens of the present invention contains, in mass %, SiO 2 50-70%, B 2 O 3 1-18%, Al 2 O 3 0-15%, ZnO 0-20%, CaO 0.1-10%. , Na 2 O + K 2 O 0.1-18%, Sb 2 O 3 0-1%, and SnO 2 0-1%. Below, the reason why the content of each component was specified as mentioned above will be explained in detail. In addition, unless otherwise specified, "%" below means "mass %".
ＳｉＯ２は、屈折率を低下させ、また液相粘度を高くし、さらに耐久性を向上させる効果がある。ＳｉＯ２の含有量は５０～７０％であり、５２～６８％、５４～６６％、特に５６～６４％であることが好ましい。ＳｉＯ２の含有量が少なすぎると、屈折率を低下させることが困難になる。一方、ＳｉＯ２の含有量が多すぎると、ガラスの溶解性が悪化したり、ＳｉＯ２を含む失透物が析出しやすくなる。 SiO 2 has the effect of lowering the refractive index, increasing the liquidus viscosity, and further improving the durability. The content of SiO 2 is 50-70%, preferably 52-68%, 54-66%, particularly 56-64%. If the content of SiO 2 is too low, it will be difficult to lower the refractive index. On the other hand, if the content of SiO 2 is too large, the solubility of the glass deteriorates or devitrification containing SiO 2 tends to precipitate.
Ｂ２Ｏ３は屈折率を低下させ、また液相粘度を高くし、さらに耐久性を向上させる効果がある。Ｂ２Ｏ３の含有量は１～１８％であり、２～１６％、４～１４％、特に６～１２％であることが好ましい。Ｂ２Ｏ３の含有量が少なすぎると、屈折率を低下させることが困難になる。一方、Ｂ２Ｏ３の含有量が多すぎると、耐久性が悪化したり、成形時に蒸発しやすいため脈理が発生しやすくなる。 B 2 O 3 has the effect of lowering the refractive index, increasing the liquidus viscosity, and further improving the durability. The content of B 2 O 3 is 1 to 18%, preferably 2 to 16%, 4 to 14%, particularly 6 to 12%. If the content of B 2 O 3 is too small, it will be difficult to lower the refractive index. On the other hand, if the content of B 2 O 3 is too large, the durability will deteriorate or it will easily evaporate during molding, making striae more likely to occur.
Ａｌ２Ｏ３は、屈折率を低下させ、また液相粘度を高くし、さらに耐久性を向上させる効果がある。Ａｌ２Ｏ３の含有量は０～１５％であり、１～１３％、２～１１％、特に３～９％であることが好ましい。一方、Ａｌ２Ｏ３の含有量が多すぎると、ガラスの溶解性が悪化したり、Ａｌ２Ｏ３を含む失透物が析出しやすくなる。 Al 2 O 3 has the effect of lowering the refractive index, increasing the liquidus viscosity, and further improving the durability. The content of Al 2 O 3 is 0 to 15%, preferably 1 to 13%, 2 to 11%, particularly 3 to 9%. On the other hand, when the content of Al 2 O 3 is too large, the solubility of the glass deteriorates, and devitrification containing Al 2 O 3 tends to precipitate.
なお、ＳｉＯ２＋Ｂ２Ｏ３＋Ａｌ２Ｏ３の含有量は、６０～８５％、６２～８３％、６４～８１％、特に６６～７９％であることが好ましい。ＳｉＯ２＋Ｂ２Ｏ３＋Ａｌ２Ｏ３の含有量が少なすぎると、屈折率を低下させることが困難になる。一方、ＳｉＯ２＋Ｂ２Ｏ３＋Ａｌ２Ｏ３の含有量が多すぎると、ガラスの溶解性が悪化しやすくなる。ここで、「ＳｉＯ２＋Ｂ２Ｏ３＋Ａｌ２Ｏ３」とは、ＳｉＯ２、Ｂ２Ｏ３及びＡｌ２Ｏ３の含有量の合量を意味する。 Note that the content of SiO 2 +B 2 O 3 +Al 2 O 3 is preferably 60 to 85%, 62 to 83%, 64 to 81%, particularly 66 to 79%. If the content of SiO 2 +B 2 O 3 +Al 2 O 3 is too small, it will be difficult to lower the refractive index. On the other hand, if the content of SiO 2 +B 2 O 3 +Al 2 O 3 is too large, the solubility of the glass tends to deteriorate. Here, “SiO 2 +B 2 O 3 +Al 2 O 3 ” means the total content of SiO 2 , B 2 O 3 and Al 2 O 3 .
ＣａＯは、耐久性を維持しながら、ガラスの高温粘性を低下させる効果がある。ＣａＯの含有量は０．１～１０％であり、１～９％、２～７％、特に３～６％であることが好ましい。ＣａＯの含有量が少なすぎると、上記効果が得られにくくなる。一方、ＣａＯの含有量が多すぎると、耐久性が悪化したり、ＣａＯを含む失透物が析出しやすくなる。 CaO has the effect of reducing the high temperature viscosity of glass while maintaining durability. The content of CaO is 0.1 to 10%, preferably 1 to 9%, 2 to 7%, particularly 3 to 6%. If the content of CaO is too low, it will be difficult to obtain the above effects. On the other hand, if the content of CaO is too large, durability may deteriorate or devitrification containing CaO may easily precipitate.
ＳｉＯ２／ＣａＯは、８～４００、１０～１００、特に１５～７０であることが好ましい。ＳｉＯ２／ＣａＯが小さすぎると、ＣａＯを含む失透物が析出しやすくなる。一方、ＳｉＯ２／ＣａＯが大きすぎると、ＳｉＯ２を含む失透物が析出しやすくなる。ここで、「ＳｉＯ２／ＣａＯ」とは、ＳｉＯ２の含有量をＣａＯの含有量で除した値を指す。 SiO 2 /CaO is preferably 8-400, 10-100, particularly 15-70. If SiO 2 /CaO is too small, devitrification containing CaO is likely to precipitate. On the other hand, if SiO 2 /CaO is too large, devitrification containing SiO 2 will easily precipitate. Here, "SiO 2 /CaO" refers to the value obtained by dividing the content of SiO 2 by the content of CaO.
なお、ＳｉＯ２＋ＣａＯの含有量は、５１～７０％、５３～６８％、特に５５～６６％であることが好ましい。ＳｉＯ２＋ＣａＯの含有量が少なすぎると、屈折率を低下させることが困難になる。一方、ＳｉＯ２＋ＣａＯの含有量が多すぎると、ガラスの溶解性が悪化しやすくなる。ここで、「ＳｉＯ２＋ＣａＯ」とは、ＳｉＯ２及びＣａＯの含有量の合量を意味する。 Note that the content of SiO 2 +CaO is preferably 51 to 70%, 53 to 68%, particularly 55 to 66%. If the content of SiO 2 +CaO is too small, it will be difficult to lower the refractive index. On the other hand, if the content of SiO 2 +CaO is too large, the solubility of the glass tends to deteriorate. Here, "SiO 2 +CaO" means the total content of SiO 2 and CaO.
ＺｎＯは、耐久性を維持しながら、ガラスの高温粘性を低下させる効果がある。ＺｎＯの含有量は０～２０％であり、１～１８％、２～１６％、特に３～１４％であることが好ましい。ＺｎＯの含有量が多すぎると、耐久性が悪化しやすくなる。 ZnO has the effect of reducing the high temperature viscosity of glass while maintaining durability. The content of ZnO is 0 to 20%, preferably 1 to 18%, 2 to 16%, particularly 3 to 14%. If the ZnO content is too high, durability tends to deteriorate.
なお、Ａｌ２Ｏ３＋ＺｎＯの含有量は、２～３０％、５～２５％、特に８～２０％であることが好ましい。Ａｌ２Ｏ３＋ＺｎＯの含有量が少なすぎると、耐久性が悪化しやすくなる。一方、Ａｌ２Ｏ３＋ＺｎＯの含有量が多すぎると、ガラスの溶解性が悪化しやすくなる。ここで、「Ａｌ２Ｏ３＋ＺｎＯ」とは、Ａｌ２Ｏ３及びＺｎＯの含有量の合量を意味する。 Note that the content of Al 2 O 3 +ZnO is preferably 2 to 30%, 5 to 25%, particularly 8 to 20%. If the content of Al 2 O 3 +ZnO is too small, durability tends to deteriorate. On the other hand, if the content of Al 2 O 3 +ZnO is too large, the solubility of the glass tends to deteriorate. Here, "Al 2 O 3 + ZnO" means the total content of Al 2 O 3 and ZnO.
また、ＺｎＯ＋ＣａＯの含有量は、０．１～３０％、２～２５％、４～２０％、特に６～１５％であることが好ましい。ＺｎＯ＋ＣａＯの含有量が少なすぎても、多すぎても、耐久性が悪化しやすくなる。 Further, the content of ZnO+CaO is preferably 0.1 to 30%, 2 to 25%, 4 to 20%, particularly 6 to 15%. If the content of ZnO+CaO is too low or too high, durability tends to deteriorate.
（ＳｉＯ２＋ＣａＯ）／（Ａｌ２Ｏ３＋ＺｎＯ）は、１～２０、２～１５、３～１０、特に５～８であることが好ましい。（ＳｉＯ２＋ＣａＯ）／（Ａｌ２Ｏ３＋ＺｎＯ）が小さすぎると、耐久性が悪化しやすくなる。一方、（ＳｉＯ２＋ＣａＯ）／（Ａｌ２Ｏ３＋ＺｎＯ）が大きすぎると、ＳｉＯ２及び／またはＣａＯを含む失透物が析出しやすくなる。ここで、「（ＳｉＯ２＋ＣａＯ）／（Ａｌ２Ｏ３＋ＺｎＯ）」とは、ＳｉＯ２及びＣａＯの含有量の合量をＡｌ２Ｏ３及びＺｎＯの含有量の合量で除した値を指す。 (SiO 2 +CaO)/(Al 2 O 3 +ZnO) is preferably 1-20, 2-15, 3-10, particularly 5-8. If (SiO 2 +CaO)/(Al 2 O 3 +ZnO) is too small, durability tends to deteriorate. On the other hand, if (SiO 2 +CaO)/(Al 2 O 3 +ZnO) is too large, devitrification containing SiO 2 and/or CaO will easily precipitate. Here, "(SiO 2 + CaO) / (Al 2 O 3 + ZnO)" refers to the value obtained by dividing the total content of SiO 2 and CaO by the total content of Al 2 O 3 and ZnO. .
Ｎａ２Ｏ及びＫ２Ｏは、ガラスの高温粘性を低下し、液相粘度を高くする効果がある。Ｎａ２Ｏ＋Ｋ２Ｏの含有量は、０．１～１８％であり、１～１６％、２～１４％、特に３～１２％であることが好ましい。Ｎａ２Ｏ＋Ｋ２Ｏの含有量が少なすぎると、上記効果が得られにくくなる。一方、Ｎａ２Ｏ＋Ｋ２Ｏの含有量が多すぎると、耐久性が悪化しやすくなる。 Na 2 O and K 2 O have the effect of lowering the high temperature viscosity of the glass and increasing the liquidus viscosity. The content of Na 2 O + K 2 O is 0.1 to 18%, preferably 1 to 16%, 2 to 14%, particularly 3 to 12%. If the content of Na 2 O + K 2 O is too small, it will be difficult to obtain the above effects. On the other hand, if the content of Na 2 O + K 2 O is too large, durability tends to deteriorate.
なお、Ｎａ２Ｏの含有量の好ましい範囲は、０．１～１８％、１～１６％、２～１４％、３～１２％であり、Ｋ２Ｏの含有量の好ましい範囲は、０～５％、０～４％、０～３％、０．１～２％である。 Note that the preferred range of the Na 2 O content is 0.1 to 18%, 1 to 16%, 2 to 14%, and 3 to 12%, and the preferred range of the K 2 O content is 0 to 12%. 5%, 0-4%, 0-3%, and 0.1-2%.
Ｓｂ２Ｏ３は脱泡の効果があり、またＰｔイオン（不純物としてガラス中に数ｐｐｍ混入）による着色を抑える効果がある。Ｓｂ２Ｏ３の含有量は、０～１％であり、０～０．０９％、特に０～０．０８％であることが好ましい。Ｓｂ２Ｏ３は強い酸化力を有するため、Ｓｂ２Ｏ３の含有量が多すぎると、溶融容器に使用するＰｔやＲｈといった金属を酸化し、量産性が低下しやすくなる。 Sb 2 O 3 has a defoaming effect and also has an effect of suppressing coloring caused by Pt ions (several ppm mixed into the glass as an impurity). The content of Sb 2 O 3 is 0 to 1%, preferably 0 to 0.09%, particularly 0 to 0.08%. Since Sb 2 O 3 has strong oxidizing power, if the content of Sb 2 O 3 is too large, metals such as Pt and Rh used in the melting vessel are likely to be oxidized, and mass productivity is likely to be reduced.
ＳｎＯ２は脱泡の効果がある。ＳｎＯ２の含有量は、０～１％であり、０～０．０９％、特に０～０．０８％であることが好ましい。ＳｎＯ２の含有量が多すぎると、失透しやすくなる。 SnO 2 has a defoaming effect. The content of SnO 2 is preferably 0 to 1%, preferably 0 to 0.09%, particularly 0 to 0.08%. If the content of SnO 2 is too large, devitrification tends to occur.
上記成分以外にも、以下に示す種々の成分を含有させることができる。 In addition to the above components, various components shown below can be included.
ＢａＯは、耐久性を維持しながら、ガラスの高温粘性を低下させる効果がある。ＢａＯの含有量は０～１５％、１～１３％、２～１１％、特に３～９％であることが好ましい。ＢａＯの含有量が多すぎると、耐久性が悪化しやすくなる。 BaO has the effect of reducing the high temperature viscosity of glass while maintaining durability. The content of BaO is preferably 0 to 15%, 1 to 13%, 2 to 11%, particularly 3 to 9%. If the BaO content is too high, durability tends to deteriorate.
ＳｒＯは、耐久性を維持しながら、ガラスの高温粘性を低下させる効果がある。ＳｒＯの含有量は０～１５％、１～１３％、２～１１％、特に３～９％であることが好ましい。ＳｒＯの含有量が多すぎると、耐久性が悪化しやすくなる。 SrO has the effect of reducing the high temperature viscosity of glass while maintaining durability. The content of SrO is preferably 0 to 15%, 1 to 13%, 2 to 11%, particularly 3 to 9%. If the SrO content is too high, durability tends to deteriorate.
ＭｇＯは、耐久性を維持しながら、ガラスの高温粘性を低下させる効果がある。ＭｇＯの含有量は０～１５％、１～１３％、２～１１％、特に３～９％であることが好ましい。ＭｇＯの含有量が多すぎると、耐久性が悪化しやすくなる。 MgO has the effect of reducing the high temperature viscosity of glass while maintaining durability. The content of MgO is preferably 0 to 15%, 1 to 13%, 2 to 11%, particularly 3 to 9%. If the MgO content is too high, durability tends to deteriorate.
なお、ＢａＯ＋ＳｒＯ＋ＭｇＯの含有量は、０～２０％、２～１８％、４～１６％、特に６～１４％であることが好ましい。ＢａＯ＋ＳｒＯ＋ＭｇＯの含有量が多すぎると、耐久性が悪化しやすくなる。 The content of BaO+SrO+MgO is preferably 0 to 20%, 2 to 18%, 4 to 16%, particularly 6 to 14%. If the content of BaO+SrO+MgO is too large, durability tends to deteriorate.
また、ＭｇＯ＋ＣａＯ＋ＳｒＯ＋ＢａＯ＋ＺｎＯの含有量は、０．１～２５％、１～２３％、特に２～２１％であることが好ましい。ＭｇＯ＋ＣａＯ＋ＳｒＯ＋ＢａＯ＋ＺｎＯの含有量が少なすぎても、多すぎても、耐久性が悪化しやすくなる。ここで、「ＭｇＯ＋ＣａＯ＋ＳｒＯ＋ＢａＯ＋ＺｎＯ」とは、ＭｇＯ、ＣａＯ、ＳｒＯ、ＢａＯ及びＺｎＯの含有量の合量を意味する。 Further, the content of MgO+CaO+SrO+BaO+ZnO is preferably 0.1 to 25%, 1 to 23%, particularly 2 to 21%. If the content of MgO+CaO+SrO+BaO+ZnO is too small or too large, durability tends to deteriorate. Here, "MgO+CaO+SrO+BaO+ZnO" means the total content of MgO, CaO, SrO, BaO, and ZnO.
ＺｒＯ２は、屈折率を高める効果があり、また耐久性を向上させる効果がある。ＺｒＯ２の含有量は、０～５％、０～４％、特に０．１～３％であることが好ましい。ＺｒＯ２の含有量が多すぎると、失透しやすくなる。 ZrO 2 has the effect of increasing the refractive index and also has the effect of improving durability. The content of ZrO 2 is preferably 0 to 5%, 0 to 4%, particularly 0.1 to 3%. If the content of ZrO 2 is too large, devitrification tends to occur.
Ｌａ２Ｏ３は、屈折率を高める効果があり、また耐久性を向上させる効果がある。Ｌａ２Ｏ３の含有量は、０～５％、０～４％、特に０．１～３％であることが好ましい。Ｌａ２Ｏ３の含有量が多すぎると、失透しやすくなる。 La 2 O 3 has the effect of increasing the refractive index and also has the effect of improving durability. The content of La 2 O 3 is preferably 0 to 5%, 0 to 4%, particularly 0.1 to 3%. If the content of La 2 O 3 is too large, devitrification tends to occur.
Ｇｄ２Ｏ３は、屈折率を高める効果があり、また耐久性を向上させる効果がある。Ｇｄ２Ｏ３の含有量は、０～５％、０～４％、特に０．１～３％であることが好ましい。Ｇｄ２Ｏ３の含有量が多すぎると、失透しやすくなる。 Gd 2 O 3 has the effect of increasing the refractive index and also has the effect of improving durability. The content of Gd 2 O 3 is preferably 0 to 5%, 0 to 4%, particularly 0.1 to 3%. If the content of Gd 2 O 3 is too large, devitrification tends to occur.
Ｌｉ２Ｏは、ガラスの高温粘性を低下させ、液相粘度を高くする効果がある。Ｌｉ２Ｏの含有量は、０～１０％、０．１～１０％、１～８％、２～６％、特に３～５％であることが好ましい。Ｌｉ２Ｏの含有量が多すぎると、耐久性が悪化しやすくなる。 Li 2 O has the effect of lowering the high temperature viscosity of glass and increasing the liquidus viscosity. The content of Li 2 O is preferably 0 to 10%, 0.1 to 10%, 1 to 8%, 2 to 6%, particularly 3 to 5%. If the Li 2 O content is too high, durability tends to deteriorate.
なお、Ｌｉ２Ｏ＋Ｎａ２Ｏ＋Ｋ２Ｏの含有量は、０．１～２０％、１～１８％、特に３～１６％であることが好ましい。Ｌｉ２Ｏ＋Ｎａ２Ｏ＋Ｋ２Ｏの含有量が少なすぎると、ガラスの溶解性が悪化しやすくなる。一方、Ｌｉ２Ｏ＋Ｎａ２Ｏ＋Ｋ２Ｏの含有量が多すぎると、耐久性が悪化しやすくなる。ここで、「Ｌｉ２Ｏ＋Ｎａ２Ｏ＋Ｋ２Ｏ」とは、Ｌｉ２Ｏ、Ｎａ２Ｏ及びＫ２Ｏの含有量の合量を意味する。 Note that the content of Li 2 O+Na 2 O+K 2 O is preferably 0.1 to 20%, 1 to 18%, particularly 3 to 16%. If the content of Li 2 O + Na 2 O + K 2 O is too small, the solubility of the glass tends to deteriorate. On the other hand, if the content of Li 2 O+Na 2 O+K 2 O is too large, durability tends to deteriorate. Here, " Li2O + Na2O + K2O " means the total content of Li2O , Na2O and K2O .
（ＭｇＯ＋ＣａＯ＋ＳｒＯ＋ＢａＯ＋ＺｎＯ）／（Ｌｉ２Ｏ＋Ｎａ２Ｏ＋Ｋ２Ｏ）は、０．２～４、０．３～３．５、特に０．４～３であることが好ましい。（ＭｇＯ＋ＣａＯ＋ＳｒＯ＋ＢａＯ＋ＺｎＯ）／（Ｌｉ２Ｏ＋Ｎａ２Ｏ＋Ｋ２Ｏ）が小さすぎても、大きすぎても、耐久性が悪化しやすくなる。ここで、「（ＭｇＯ＋ＣａＯ＋ＳｒＯ＋ＢａＯ＋ＺｎＯ）／（Ｌｉ２Ｏ＋Ｎａ２Ｏ＋Ｋ２Ｏ）」とは、ＭｇＯ、ＣａＯ、ＳｒＯ、ＢａＯ及びＺｎＯの含有量の合量をＬｉ２Ｏ、Ｎａ２Ｏ及びＫ２Ｏの含有量の合量で除した値を指す。 (MgO+CaO+SrO+BaO+ZnO)/(Li 2 O+Na 2 O+K 2 O) is preferably 0.2 to 4, 0.3 to 3.5, particularly 0.4 to 3. If (MgO+CaO+SrO+BaO+ZnO)/(Li 2 O+Na 2 O+K 2 O) is too small or too large, durability tends to deteriorate. Here, "(MgO+CaO+SrO+BaO+ZnO)/( Li2O + Na2O + K2O )" means the total content of MgO, CaO, SrO, BaO, and ZnO as the total content of Li2O , Na2O , and K2O . Refers to the value divided by the total amount.
なお清澄剤として広く知られているＡｓ２Ｏ３は有害であるので、実質的に含有しないことが好ましい。またＦ成分は環境に悪影響を及ぼすおそれがあることから実質的に含有しないことが好ましい。ここで「実質的に含有しない」とは、これらの成分を意図的にガラス中に添加しないという意味であり、不可避的不純物まで完全に排除するということを意味するものではない。より客観的には、不純物を含めたこれらの成分の含有量が、Ａｓ２Ｏ３で０．００００１％以下、Ｆで０．０１％以下であるということを意味する。 Note that As 2 O 3 , which is widely known as a clarifying agent, is harmful, so it is preferable that it is substantially not contained. Further, it is preferable that the F component is substantially not contained since it may have a negative effect on the environment. Here, "substantially not containing" means that these components are not intentionally added to the glass, but does not mean that inevitable impurities are completely excluded. More objectively, it means that the content of these components including impurities is 0.00001% or less for As 2 O 3 and 0.01% or less for F.
また、Ｃｕ、Ａｇ、Ｐｒ，Ｂｒはガラスを着色させる成分であることから、含有しないことが好ましい。Ｃｄは環境に対する影響を考慮し、含有しないことが好ましい。 Moreover, since Cu, Ag, Pr, and Br are components that color glass, it is preferable not to include them. Considering the influence on the environment, it is preferable not to contain Cd.
以上の組成を有する光学ガラスレンズは、屈折率ｎｄが１．４８～１．５５、１．５０～１．５３、特に１．５１～１．５２になりやすく、１３１０ｎｍにおける屈折率が１．４６～１．５３、１．４７～１．５２、特に１．４８～１．５１になりやすい。 Optical glass lenses having the above composition tend to have a refractive index nd of 1.48 to 1.55, 1.50 to 1.53, especially 1.51 to 1.52, and a refractive index of 1.46 at 1310 nm. ~1.53, 1.47 to 1.52, especially 1.48 to 1.51.
本発明の光学ガラスレンズは、反射防止膜を設けてもよい。ただし、上記のように屈折率が低い場合は、反射防止膜を設けなくても構わない。 The optical glass lens of the present invention may be provided with an antireflection film. However, if the refractive index is low as described above, the antireflection film may not be provided.
以上の組成を有する光学ガラスレンズは、ＪＯＧＩＳに基づく耐水性が２級以上になりやすく、さらに液相粘度が、１０５．０ｄＰａ・ｓ以上になりやすい。 Optical glass lenses having the above composition tend to have water resistance of grade 2 or higher based on JOGIS, and liquidus viscosity of 10 5.0 dPa·s or higher.
本発明の光学ガラスレンズは、３０～３００℃の範囲における熱膨張係数が５０×１０－７／℃～８５×１０－７／℃、５５×１０－７／℃～８０×１０－７／℃、特に６０×１０－７／℃～７５×１０－７／℃であることが好ましい。熱膨張係数が小さすぎても大きすぎても、レンズキャップの構成部材として光学ガラスレンズを使用した際に、光学ガラスレンズと金属製シェルとの熱膨張係数差が大きくなり、レンズキャップを作製する際に光学ガラスレンズが破損しやすくなる。 The optical glass lens of the present invention has a thermal expansion coefficient of 50×10 -7 /°C to 85×10 -7 /°C, 55×10 -7 /°C to 80×10 -7 /°C in the range of 30 to 300 °C. , particularly preferably from 60×10 −7 /°C to 75×10 −7 /°C. If the coefficient of thermal expansion is too small or too large, when an optical glass lens is used as a component of a lens cap, the difference in coefficient of thermal expansion between the optical glass lens and the metal shell will become large, making it difficult to manufacture the lens cap. In this case, the optical glass lens becomes easily damaged.
本発明の光学ガラスレンズは、屈伏点が６４０℃以下、６３０℃以下、特に６２０℃以下であることが好ましい。屈伏点が高すぎると、後述するプレス成型の際に加熱温度が高くなり、金型が破損しやすくなる。なお、屈伏点の下限は特に限定されないが、現実的には５００℃以上である。 The optical glass lens of the present invention preferably has a yield point of 640°C or lower, 630°C or lower, particularly 620°C or lower. If the yield point is too high, the heating temperature will be high during press molding, which will be described later, and the mold will be easily damaged. Note that the lower limit of the yield point is not particularly limited, but realistically it is 500°C or higher.
次に、本発明の光学ガラスレンズを製造する方法を述べる。 Next, a method for manufacturing the optical glass lens of the present invention will be described.
まず、所望の組成になるようにガラス原料を調合した後、ガラス溶融炉で溶融する。ガラスの溶融温度は１１５０℃以上、１２００℃以上、特に１２５０℃以上であることが好ましい。なお溶融容器を構成する白金金属からのＰｔ溶け込みによるガラス着色を防止する観点から、溶融温度は１４５０℃以下、１４００℃以下、１３５０℃以下、特に１３００℃以下であることが好ましい。 First, glass raw materials are prepared to have a desired composition and then melted in a glass melting furnace. The melting temperature of the glass is preferably 1150°C or higher, 1200°C or higher, particularly 1250°C or higher. Note that from the viewpoint of preventing glass discoloration due to dissolution of Pt from the platinum metal constituting the melting container, the melting temperature is preferably 1450°C or lower, 1400°C or lower, 1350°C or lower, particularly 1300°C or lower.
また溶融時間が短すぎると、十分に脱泡できない可能性があるので、溶融時間は２時間以上、特に３時間以上であることが好ましい。ただし溶融容器からのＰｔ溶け込みによるガラス着色を防止する観点から、溶融時間は８時間以内、特に５時間以内であることが好ましい。 Furthermore, if the melting time is too short, sufficient defoaming may not be possible, so the melting time is preferably 2 hours or more, particularly 3 hours or more. However, from the viewpoint of preventing glass discoloration due to Pt melting from the melting container, the melting time is preferably within 8 hours, particularly within 5 hours.
次に、溶融ガラスをノズルの先端から滴下して一旦液滴状ガラスを作製する。または溶融ガラスを急冷鋳造して一旦ガラスブロックを作製する。その後、研削、研磨、洗浄して光学ガラスレンズを得る。なお、作製したガラスブロックを加熱延伸成形した後に研削、研磨、洗浄しても構わない。加熱延伸成形することにより、ガラス表面が滑らかな火造り面となるため、研削、研磨工程の時間を短くすることができる。 Next, droplet-shaped glass is temporarily produced by dropping molten glass from the tip of the nozzle. Alternatively, a glass block is once produced by rapidly cooling and casting molten glass. After that, it is ground, polished and cleaned to obtain an optical glass lens. Note that the produced glass block may be subjected to grinding, polishing, and cleaning after being heat-stretched. By heating and stretching, the glass surface becomes a smooth flame-forming surface, so the time required for grinding and polishing steps can be shortened.
本発明の光学ガラスレンズは、研磨されるため、研磨痕を有しやすい。また、耐久性が良好であるため、研削、研磨、洗浄を施しても、ヤケが発生しにくい。 Since the optical glass lens of the present invention is polished, it tends to have polishing marks. In addition, since it has good durability, it is unlikely to cause discoloration even after grinding, polishing, and cleaning.
続いて、精密加工を施した金型中に光学ガラスレンズを投入して軟化状態となるまで加熱しながらプレス成型し、金型の表面形状を光学ガラスレンズに転写させても構わない。このようにすれば、両凸形状（例えば球状）、平凸形状、メニスカス形状等にすることが可能である。 Subsequently, an optical glass lens may be put into a precision-machined mold and press-molded while being heated until it becomes a softened state, thereby transferring the surface shape of the mold onto the optical glass lens. In this way, it is possible to form a biconvex shape (for example, a spherical shape), a plano-convex shape, a meniscus shape, etc.
なお、本発明の光学ガラスレンズを板状基板上に形成することによりレンズアレイとして使用することができる。また、本発明の光学ガラスレンズをプリズム上に形成することにより、プリズムとレンズの性能を兼ね備えることができる。 Note that by forming the optical glass lens of the present invention on a plate-like substrate, it can be used as a lens array. Furthermore, by forming the optical glass lens of the present invention on a prism, it is possible to have both the performance of a prism and a lens.
次に、本発明の光学ガラスレンズを用いたレンズキャップの実施形態について説明する。 Next, an embodiment of a lens cap using the optical glass lens of the present invention will be described.
図１は、レンズキャップの構成を示す説明図である。 FIG. 1 is an explanatory diagram showing the structure of a lens cap.
レンズキャップ１は、円筒形状の側壁部２と、側壁部２の先端に設けられ且つその中心部にレンズ保持孔を有する端壁部３とから構成された金属製シェル４と、金属製シェル４のレンズ保持孔に封着材料５で封着された光学ガラスレンズ６とを備えている。 The lens cap 1 includes a metal shell 4 composed of a cylindrical side wall part 2, an end wall part 3 provided at the tip of the side wall part 2 and having a lens holding hole in the center thereof, and a metal shell 4. The optical glass lens 6 is sealed in the lens holding hole with a sealing material 5.
なお、金属製シェル４の材質としては、ハステロイ（登録商標）、インコネル（登録商標）、ＳＵＳ等を使用することができる。また、封着材料５としては、低融点ガラス、接着剤、はんだ等を使用することができる。 Note that, as the material of the metal shell 4, Hastelloy (registered trademark), Inconel (registered trademark), SUS, etc. can be used. Moreover, as the sealing material 5, low melting point glass, adhesive, solder, etc. can be used.
以下、本発明の光学ガラスレンズを実施例に基づいて詳細に説明する。 Hereinafter, the optical glass lens of the present invention will be explained in detail based on Examples.
表１及び２は本発明の実施例（試料Ｎｏ．１～１５）及び比較例（試料Ｎｏ．１６）を示している。 Tables 1 and 2 show Examples (Samples No. 1 to 15) of the present invention and Comparative Examples (Sample No. 16).
まず、表１及び２に記載の組成となるように調合したガラス原料を白金ルツボに入れ、１３００℃でそれぞれ２時間溶融した。次に、溶融ガラスをカーボン板上に流し出し、冷却固化した後、アニールを行ってガラスブロックを作製した。その後、研削、研磨、洗浄して光学ガラスレンズを得た。このようにして得られた試料について、各種特性を評価した。結果を各表に示す。 First, glass raw materials prepared to have the compositions shown in Tables 1 and 2 were placed in a platinum crucible and melted at 1300° C. for 2 hours. Next, the molten glass was poured onto a carbon plate, cooled and solidified, and then annealed to produce a glass block. Thereafter, an optical glass lens was obtained by grinding, polishing, and cleaning. Various properties of the sample thus obtained were evaluated. The results are shown in each table.
屈折率ｎｄは、屈折率計を用いて、ｄ線（波長：５８７．６ｎｍ）における測定値で示した。 The refractive index nd was expressed as a value measured at the d-line (wavelength: 587.6 nm) using a refractometer.
屈折率ｎ１３１０は、屈折率計を用いて、１３１０ｎｍにおける測定値で示した。 The refractive index n1310 was measured at 1310 nm using a refractometer.
３０～３００℃における熱膨張係数、屈伏点は、熱膨張測定装置（ｄｉｌａｔｏ ｍｅｔｅｒ）にて測定した。 The thermal expansion coefficient and yield point at 30 to 300°C were measured using a dilato meter.
耐水性は、ＪＯＧＩＳに定める粉末法に基づき測定した。 Water resistance was measured based on the powder method specified by JOGIS.
液相粘度は、白金球引き上げ法にて測定した。 The liquidus viscosity was measured by the platinum ball pulling method.
表から明らかなように、本発明の実施例であるＮｏ．１～１５の各試料は、屈折率ｎｄが１．５０１～１．５２８、屈折率ｎ１３１０が１．４８６～１．５１３、熱膨張係数が６４×１０－７／℃～８０×１０－７／℃、屈伏点が５３６～６２４℃であった。またＪＯＧＩＳ耐水性（粉末法）は１～２級であり、液相粘度は１０５．０～１０６．５ｄＰａ・ｓであった。これに対して比較例であるＮｏ．１６の試料は、ＪＯＧＩＳ耐水性（粉末法）は３級であり、液相粘度が１０４．３ｄＰａ・ｓであり、量産性に劣ることが分かった。 As is clear from the table, No. 1, which is an example of the present invention. Each of the samples Nos. 1 to 15 has a refractive index nd of 1.501 to 1.528, a refractive index n1310 of 1.486 to 1.513, and a thermal expansion coefficient of 64×10 −7 /°C to 80×10 −7 / °C, yield point was 536-624 °C. Further, the JOGIS water resistance (powder method) was 1st to 2nd grade, and the liquidus viscosity was 10 5.0 to 10 6.5 dPa·s. On the other hand, the comparative example No. Sample No. 16 had a JOGIS water resistance (powder method) of grade 3, a liquidus viscosity of 10 4.3 dPa·s, and was found to be inferior in mass productivity.
１ レンズキャップ
２ 側壁部
３ 端壁部
４ 金属製シェル
５ 封着材料
６ 光学ガラスレンズ
1 Lens cap 2 Side wall 3 End wall 4 Metal shell 5 Sealing material 6 Optical glass lens
Claims (9)
ＭｇＯ＋ＣａＯ＋ＳｒＯ＋ＢａＯ＋ＺｎＯ／（Ｌｉ ２ Ｏ＋Ｎａ ２ Ｏ＋Ｋ ２ Ｏ）が０．２～４であり、
屈折率（ｎｄ）が１．４８～１．５５であり、ＪＯＧＩＳに基づく耐水性が２級以上であることを特徴とする光学ガラスレンズ。 In mass %, SiO 2 50 to 70%, B 2 O 3 1 to 18%, Al 2 O 3 3.8 to 15%, ZnO 0 to 16 %, CaO 0.1 to 10%, Li 2 O 0 to 2.6%, Na 2 O 5.7-18%, Na 2 O + K 2 O 5.7-18 %, Sb 2 O 3 0-1%, SnO 2 0-1% , ZrO 2 0-5%, Contains La 2 O 3 0-5%, Gd 2 O 3 0-5%, SiO 2 + B 2 O 3 + Al 2 O 3 66-85%, ZnO + CaO 0.1-20%, MgO + CaO + SrO + BaO + ZnO 5.8-25% death,
MgO+CaO+SrO+BaO+ZnO/(Li 2 O+Na 2 O+K 2 O) is 0.2 to 4,
An optical glass lens having a refractive index (nd) of 1.48 to 1.55 and a water resistance of grade 2 or higher based on JOGIS .
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| PCT/JP2017/047310 WO2018139167A1 (en) | 2017-01-25 | 2017-12-28 | Optical glass lens |
| TW107101149A TW201833050A (en) | 2017-01-25 | 2018-01-12 | Optical glass lens |
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| DE112019000282A5 (en) | 2018-03-20 | 2020-10-15 | Docter Optics Se | METHOD OF MANUFACTURING A LENS ELEMENT |
| DE102020119043A1 (en) | 2019-10-09 | 2021-04-15 | Docter Optics Se | Method for producing an optical element, in particular a headlight lens for a motor vehicle headlight |
| CN112028474B (en) * | 2020-09-11 | 2022-04-15 | 成都光明光电股份有限公司 | Optical glass |
| CN112028475B (en) * | 2020-09-11 | 2022-04-15 | 成都光明光电股份有限公司 | Optical glass and optical element |
| US11708289B2 (en) | 2020-12-03 | 2023-07-25 | Docter Optics Se | Process for the production of an optical element from glass |
| DE102022101728A1 (en) | 2021-02-01 | 2022-08-04 | Docter Optics Se | Process for manufacturing an optical element from glass |
| DE102021105560A1 (en) | 2021-03-08 | 2022-09-08 | Docter Optics Se | Process for manufacturing an optical element from glass |
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| JP2005225707A (en) | 2004-02-12 | 2005-08-25 | Hoya Corp | Glass preform for mold press forming, its manufacturing method, and method of manufacturing glass optical element |
| WO2008007504A1 (en) | 2006-07-11 | 2008-01-17 | Nippon Electric Glass Co., Ltd. | Glass composition for sealing and sealed material |
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| JPH0274536A (en) * | 1988-09-07 | 1990-03-14 | Toshiba Glass Co Ltd | Hard glass for press molding |
| JP3100726B2 (en) * | 1992-01-23 | 2000-10-23 | 株式会社住田光学ガラス | Optical glass for precision press molding |
| JP2933453B2 (en) * | 1992-09-25 | 1999-08-16 | 株式会社オハラ | Optical glass |
| BR9506088A (en) * | 1994-12-27 | 1997-12-23 | Corning Inc | Corrective lenses and glass for ophthalmic applications |
| DE19650692C2 (en) * | 1996-12-06 | 1999-01-14 | Schott Glas | Lead-free crown glasses |
| JP2005037651A (en) * | 2003-07-14 | 2005-02-10 | Hoya Corp | Optical glass for lens mounted in projector, its manufacturing method, lens mounted in projector, and projector |
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| JP2005225707A (en) | 2004-02-12 | 2005-08-25 | Hoya Corp | Glass preform for mold press forming, its manufacturing method, and method of manufacturing glass optical element |
| WO2008007504A1 (en) | 2006-07-11 | 2008-01-17 | Nippon Electric Glass Co., Ltd. | Glass composition for sealing and sealed material |
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