JP2013151427A5

JP2013151427A5 -

Info

Publication number: JP2013151427A5
Application number: JP2013091948A
Authority: JP
Filing date: 2013-04-25
Publication date: 2013-09-26
Anticipated expiration: 2030-12-22

Description

本発明は以下のとおりである。
[１]
酸化物ガラスであって、
カチオン％表示にて、
Ｐ⁵⁺を16〜35％、
Ｂｉ³⁺を14〜35％、
Ｎｂ⁵⁺を10〜33％、
Ｔｉ⁴⁺を0〜18％、
Ｗ⁶⁺を0〜20％
含み、
Ｂｉ³⁺、Ｎｂ⁵⁺、Ｔｉ⁴⁺およびＷ⁶⁺の合計含有量が58％以上、
屈折率ｎｄが2.05を超え、アッベ数νｄが18.5以下であることを特徴とする光学ガラス。
[２]
液相温度における粘度が1.0dPa・s以上である[１]に記載の光学ガラス。
[３]
Ｌｉ⁺、Ｎａ⁺およびＫ⁺のうち、少なくとも１種以上のアルカリ金属成分を含み、
Ｌｉ⁺の含有量が7カチオン％以下、
Ｎａ⁺の含有量が20カチオン％以下、
Ｋ⁺の含有量が10カチオン％以下、
Ｌｉ⁺、Ｎａ⁺およびＫ⁺の合計含有量に対するＮａ⁺の含有量の比（Ｎａ⁺／（Ｌｉ⁺＋Ｎａ⁺＋Ｋ⁺））が0.2〜1である[１]または[２]に記載の光学ガラス。
[４]
Ｂ³⁺の含有量が0〜20カチオン％である[１]〜[３]のいずれか１項に記載の光学ガラス。
[５]
Ｐ⁵⁺、Ｂｉ³⁺、Ｎｂ⁵⁺、Ｔｉ⁴⁺、Ｗ⁶⁺、Ｌｉ⁺、Ｎａ⁺、Ｋ⁺、Ｓｉ⁴⁺、Ｂａ²⁺およびＢ³⁺の合計含有量が90カチオン％以上である［１］〜［４］のいずれか１項に記載の光学ガラス。
[６]
液相温度が940℃以上である［１］〜［５］のいずれか１項に記載の光学ガラス。
[７]
［１］〜［６］のいずれか１項に記載の光学ガラスからなるプレス成形用ガラス素材。
[８]
［１］〜［６］のいずれか１項に記載の光学ガラスからなる光学素子。 The present invention is as follows.
[1]
Oxide glass,
In cation% display,
16 to 35% of P ⁵⁺
Bi ³⁺ 14-35%,
Nb ⁵⁺ 10-33%,
Ti ⁴⁺ 0-18%,
W ⁶⁺ 0-20%
Including
The total content of Bi ³⁺ , Nb ⁵⁺ , Ti ⁴⁺ and W ⁶⁺ is 58 % or more,
An optical glass having a refractive index nd of more than 2.05 and an Abbe number νd of 18.5 or less.
[2]
Optical glass as described in [1] whose viscosity in liquidus temperature is 1.0 dPa * s or more.
[3]
Including at least one alkali metal component of Li ⁺ , Na ⁺ and K ⁺ ,
Li ⁺ content is 7 cation% or less,
Na ⁺ content of 20 cations or less,
K ⁺ content is 10 cation% or less,
The optical element according to [1] or [2], wherein the ratio of the content of Na ⁺ to the total content of Li ⁺ , Na ⁺ and K ⁺ (Na ⁺ / (Li ⁺ + Na ⁺ + K ⁺ )) is 0.2 to 1. Glass.
[4]
The optical glass according to any one of [1] to [3], wherein the content of B ³⁺ is 0 to 20 cation%.
[5]
The total content of P ⁵⁺ , Bi ³⁺ , Nb ⁵⁺ , Ti ⁴⁺ , W ⁶⁺ , Li ⁺ , Na ⁺ , K ⁺ , Si ⁴⁺ , Ba ²⁺ and B ³⁺ is 90 cation% or more. The optical glass according to any one of [1] to [4].
[6]
Optical glass given in any 1 paragraph of [1]-[5] whose liquidus temperature is 940 ° C or more.
[7]
A glass material for press molding comprising the optical glass according to any one of [1] to [6].
[8]
An optical element made of the optical glass according to any one of [1] to [6].

Claims

Oxide glass,
In cation% display,
16 to 35% of P ⁵⁺
Bi ³⁺ 14-35%,
Nb ⁵⁺ 10-33%,
Ti ⁴⁺ 0-18%,
W ⁶⁺ 0-20%
Including
The total content of Bi ³⁺ , Nb ⁵⁺ , Ti ⁴⁺ and W ⁶⁺ is 58 % or more,
An optical glass having a refractive index nd of more than 2.05 and an Abbe number νd of 18.5 or less.