JP2010215503A5

JP2010215503A5 -

Info

Publication number: JP2010215503A5
Application number: JP2010112780A
Authority: JP
Filing date: 2010-05-17
Publication date: 2012-01-05
Anticipated expiration: 2023-12-22

Description

すなわち、本発明は、
（１）重量％表示で、Ｂ_２Ｏ_３を２〜４５％、ＳｉＯ_２を０〜３０％（ただし、Ｂ_２Ｏ_３の含有量＞ＳｉＯ_２含有量）、Ｌａ_２Ｏ_３を１０〜５０％、ＴｉＯ_２を０〜３０％、ＺｎＯを０〜１５％、ＺｒＯ_２を０〜１５％、Ｎｂ_２Ｏ_５を０〜３５％、ＢａＯを０〜３５％、ＳｒＯを０〜５％、ＣａＯを０％以上８％未満、ＭｇＯを０％以上１３％未満（ただし、ＢａＯ、ＳｒＯ、ＣａＯおよびＭｇＯの合計含有量０〜４０％）、Ｇｄ_２Ｏ_３を０〜２０％、Ｙ_２Ｏ_３を０〜１５％、Ｔａ_２Ｏ_５を０〜１８％、ＷＯ_３を０％以上０．５％未満、Ｎａ_２ＯとＫ_２ＯとＬｉ_２Ｏを合計で０％以上１．５％未満、ＧｅＯ_２を０〜１０％、Ｂｉ_２Ｏ_３を０〜２０％、Ｙｂ_２Ｏ_３を０〜１０％、Ａｌ_２Ｏ_３を０〜１０％、Ｓｂ_２Ｏ_３を０％以上２％未満およびＳｎＯ_２を０〜１％含む光学ガラスが得られるようにガラス原料を調合し、溶解、清澄、均質化して溶融ガラスを作製し、得られた溶融ガラスを流出パイプから流出して受け型又は鋳型に鋳込み成形することを特徴とするプレス成形用ガラスゴブの製造方法、
（２）光学ガラスの屈折率（ｎｄ）が１．８〜２．１で、アッベ数（νｄ）が２０〜４０である上記（１）項に記載のプレス成形用ガラスゴブの製造方法、および
（３）上記（１）または（２）項に記載の方法によりプレス成形用ガラスゴブを作製し、得られたガラスゴブを加熱、軟化し、プレス成形することを特徴とする光学素子の製造方法、
を提供するものである。
That is, the present invention
(1) By weight%, B ₂ O ₃ is ₂ to 45%, SiO ₂ is 0 to 30% (however, the content of B ₂ O ₃ > SiO ₂ content), and La ₂ O ₃ is 10 to 50 %, TiO ₂ 0-30%, ZnO 0-15%, ZrO ₂ 0-15%, Nb ₂ O ₅ 0-35%, BaO 0-35%, SrO 0-5%, CaO 0% or more and less than 8%, MgO 0% or more and less than 13% (however, the total content of BaO, SrO, CaO and MgO is 0 to 40%), Gd ₂ O ₃ is 0 to 20%, Y ₂ O ₃ the 0 to 15% _Ta 2 _{O 5} and 0 to 18%, of WO ₃ 0.5% or more and less than 0%, Na ₂ O and _{K 2} O and Li less than 1.5% or more 0% ₂ O in total GeO ₂ 0-10%, Bi ₂ O ₃ 0-20%, Yb ₂ O ₃ 0-10%, Al ₂ O ₃ 0-10%, Sb ₂ O ₃ 0% to 2% less and the SnO ₂ to prepare a glass raw material so as to obtain the 0 to 1% including optical science glass, dissolution, clarification, the molten glass was prepared by homogenisation the obtained molten A method for producing a glass gob for press molding, characterized in that glass flows out from an outflow pipe and is cast into a receiving mold or a mold,
(2) The manufacturing method of the glass gob for press molding according to the above (1) , wherein the refractive index (nd) of the optical glass is 1.8 to 2.1, and the Abbe number (νd) is 20 to 40, and
(3) A method for producing an optical element, characterized in that a glass gob for press molding is produced by the method described in (1) or (2) above, and the obtained glass gob is heated, softened, and press molded.
Is to provide.

Claims

In terms of% by weight, B ₂ O ₃ is ₂ to 45%, SiO ₂ is 0 to 30% (however, B ₂ O ₃ content> SiO ₂ content), La ₂ O ₃ is 10 to 50%, TiO ₂ 0 to 30%, ZnO 0 to 15%, ZrO _{2 0} to 15%, Nb ₂ O ₅ 0 to 35%, BaO 0 to 35%, SrO 0 to 5%, CaO 0% or more Less than 8%, MgO 0% or more and less than 13% (however, the total content of BaO, SrO, CaO and MgO is 0 to 40%), Gd ₂ O ₃ is 0 to 20%, Y ₂ O ₃ is 0 to 15 %, Ta ₂ O ₅ from 0 to 18%, WO ₃ from 0% to less than 0.5%, Na ₂ O, K ₂ O and Li ₂ O in total from 0% to less than 1.5%, GeO ₂ 0-10%, a _Bi 2 _{O 3} 0 to 20% of _Yb 2 _{O 3} 0 to 10%, the _Al 2 _{O 3} 0-10%, the _Sb 2 _{O 3} % Or more and less than 2% and the SnO ₂ to prepare a glass raw material so as to obtain 0 to 1% including optical science glass, dissolution, clarification, to prepare a homogenized molten glass, a molten glass obtained flow pipe A method for producing a glass gob for press molding, characterized in that the glass gob flows out of the mold and cast into a receiving mold or mold .

The method for producing a glass gob for press molding according to claim 1, wherein the optical glass has a refractive index (nd) of 1.8 to 2.1 and an Abbe number (νd) of 20 to 40.

A glass gob for press molding is produced by the method according to claim 1 or 2, and the obtained glass gob is heated, softened, and press molded.