公开(公告)号：EP1308424A1

公开(公告)日：2003-05-07

申请号：EP02023148.6

申请日：2002-10-15

申请人： HOYA CORPORATION

发明人： Kasuga, Yoshiko ,  Tachiwana, Kazuo ,  Yanagita, Hiroaki

IPC分类号： C03C3/062

CPC分类号： C03C3/062 ,  Y10S501/901

摘要： Disclosed is an optical glass comprising, expressed as weight percentages, greater than or equal to 18 percent and less than 30 percent of SiO 2 , greater than or equal to 12 percent and less than 23 percent of BaO, 22 to 37 percent TiO 2 , greater than or equal to 7 percent and less than 16 percent Nb 2 O 5 , 5 to 20 percent of Na 2 O, 0 to 6 percent of K 2 O, 0 to 5 percent of CaO, 0 to 5 percent of SrO, 0 to 4 percent of ZrO 2 , 0 to 3 percent of Ta 2 O 5 , 0 to 1 percent of Sb 2 O 5 , and greater than or equal to 0 percent and less than 0.5 percent of P 2 O 5 , and by essentially not comprising PbO, As 2 O 3 , and F. The optical glass exhibits a refractive index (nd) greater than or equal to 1.80 and an Abbé number ( vd ) less than or equal to 30. A method of manufacturing a glass material for press molding is disclosed. This method comprises the steps of melting the glass starting materials, forming the glass melt obtained, and annealing the formed glass and is characterized in that: the glass melt has a composition such that, (1) when rapidly cooled to room temperature, said glass melt becomes glass that has a scattering coefficient of less than 0.005 cm -1 at wavelengths of from 400 to 2,500 nm or comprises crystals with a volumetric ratio of less than 10 -6 , and (2) when maintained for three hours at a temperature 10°C higher than the glass transition temperature, maintained for 10 min at a temperature yielding a viscosity of 10 4,5 to 10 3,5 dPa • s, and then rapidly cooled to room temperature, said glass melt becomes glass that has a scattering coefficient at at least one wavelength from 400 to 2,500 nm of greater than 0.01 cm -1 or comprises crystals with a volumetric ratio of greater than 10 -5 ; and an annealing of said formed glass is conducted at a temperature lower than the glass transition temperature.

摘要翻译： 公开了一种光学玻璃，其以重量百分比表示，大于或等于18％且小于30％的SiO 2，大于或等于12％且小于23％的BaO，22至37％的TiO 2，大于 或等于7％且小于16％的Nb 2 O 5，5％至20％的Na 2 O，0至6％的K 2 O，0至5％的CaO，0至5％的SrO，0至4％的ZrO 2，0至3 Ta2O5的百分比，Sb2O5的0至1％，以及大于或等于0％且小于0.5％的P2O5，以及基本上不包含PbO，As2O3和F.该光学玻璃的折射率（nd）更大 公开了一种制造用于压制成形的玻璃材料的方法。 该方法包括熔化玻璃原料，形成所得玻璃熔体并退火所形成的玻璃的步骤，其特征在于：玻璃熔体具有如下组成：（1）当快速冷却至室温时，所述玻璃 熔体在波长为400至2500nm时变成具有小于0.005cm -1的散射系数的玻璃，或者包含体积比小于10 -6的晶体，和（2）保持3小时 在比玻璃化转变温度高10℃的温度下，在产生粘度为10 4.5至10 3.5 PaPa·s的温度下保持10分钟，然后迅速冷却至室温，所述 玻璃熔体变成在400至2500nm以上的至少一个波长具有大于0.01cm -1的散射系数的玻璃或包含体积比大于10 -5的晶体; 并且所述成形玻璃的退火在低于玻璃化转变温度的温度下进行。

公开(公告)号：EP1657224B1

公开(公告)日：2008-07-16

申请号：EP05021528.4

申请日：2002-10-15

申请人： HOYA CORPORATION

发明人： Kasuga, Yoshiko ,  Tachiwana, Kazuo ,  Yanagita, Hiroaki

IPC分类号： C03C3/062

CPC分类号： C03C3/062 ,  Y10S501/901

公开(公告)号：EP1657224A1

公开(公告)日：2006-05-17

申请号：EP05021528.4

申请日：2002-10-15

申请人： HOYA CORPORATION

发明人： Kasuga, Yoshiko ,  Tachiwana, Kazuo ,  Yanagita, Hiroaki

IPC分类号： C03C3/062

CPC分类号： C03C3/062 ,  Y10S501/901

摘要： Disclosed is an optical glass comprising, expressed as weight percentages, greater than or equal to 18 percent and less than 30 percent of SiO 2 , greater than or equal to 12 percent and less than 23 percent of BaO, 22 to 37 percent TiO 2 , greater than or equal to 7 percent and less than 16 percent Nb 2 O 5 , 5 to 20 percent of Na 2 O, 0 to 6 percent of K 2 O, 0 to 5 percent of CaO, 0 to 5 percent of SrO, 0 to 4 percent of ZrO 2 , 0 to 3 percent of Ta 2 O 5 , 0 to 1 percent of Sb 2 O 5 , and greater than or equal to 0 percent and less than 0.5 percent of P 2 O 5 , and by essentially not comprising PbO, As 2 O 3 , and F. The optical glass exhibits a refractive index (nd) greater than or equal to 1.80 and an Abbé number ( vd ) less than or equal to 30. A method of manufacturing a glass material for press molding is disclosed. This method comprises the steps of melting the glass starting materials, forming the glass melt obtained, and annealing the formed glass and is characterized in that: the glass melt has a composition such that, (1) when rapidly cooled to room temperature, said glass melt becomes glass that has a scattering coefficient of less than 0.005 cm -1 at wavelengths of from 400 to 2,500 nm or comprises crystals with a volumetric ratio of less than 10 -6 , and (2) when maintained for three hours at a temperature 10°C higher than the glass transition temperature, maintained for 10 min at a temperature yielding a viscosity of 10 4.5 to 10 3.5 dPa • s, and then rapidly cooled to room temperature, said glass melt becomes glass that has a scattering coefficient at at least one wavelength from 400 to 2,500 nm of greater than 0.01 cm -1 or comprises crystals with a volumetric ratio of greater than 10 -5 ; and an annealing of said formed glass is conducted at a temperature lower than the glass transition temperature.

摘要翻译： 公开了一种光学玻璃，其包含以重量％计，大于或等于18％且小于30％的SiO 2，大于或等于12％且小于23％的BaO，22至37％的TiO 2， 大于或等于7％且小于16％的Nb 2 O 5，5％至20％的Na 2 O，0至6％的K 2 O，0至5％的CaO，0至5％的SrO，0 至4％的ZrO 2，0至3％的Ta 2 O 5，0至1％的Sb 2 O 5，以及大于或等于0％且小于0.5％的P 2 O 5，并且基本上不 包括PbO，As 2 O 3和F.该光学玻璃的折射率（nd）大于或等于1.80，Abbé数（vd）小于或等于30.一种制造用于印刷的玻璃材料的方法 公开了成型。 该方法包括熔化玻璃原料，形成所得玻璃熔体并退火所形成的玻璃的步骤，其特征在于：玻璃熔体具有如下组成：（1）当快速冷却至室温时，所述玻璃 熔体变成波长为400〜2500nm的散射系数小于0.005cm -1的玻璃，或者包含体积比小于10 -6的晶体，和（2）在10℃下保持3小时 °C高于玻璃化转变温度，在温度为10 4.5〜10 3.5 dPa的温度下保持10分钟，然后迅速冷却至室温，所述玻璃熔体变为玻璃，其散射系数为 400至2500nm的至少一个波长大于0.01cm -1或包含体积比大于10 -5的晶体; 并且所述成形玻璃的退火在低于玻璃化转变温度的温度下进行。

公开(公告)号：EP1308424B1

公开(公告)日：2007-05-02

申请号：EP02023148.6

申请日：2002-10-15

申请人： HOYA CORPORATION

发明人： Kasuga, Yoshiko ,  Tachiwana, Kazuo ,  Yanagita, Hiroaki

IPC分类号： C03C3/062

CPC分类号： C03C3/062 ,  Y10S501/901

公开(公告)号：EP1493720A1

公开(公告)日：2005-01-05

申请号：EP04015296.9

申请日：2004-06-30

申请人： HOYA CORPORATION

发明人： Zou, Xuelu ,  Kasuga, Yoshiko ,  Fujiwara, Yasuhiro

IPC分类号： C03C3/21 ,  C03C3/16 ,  C03C3/062

CPC分类号： C03C3/21 ,  C03C3/062 ,  C03C3/16

摘要： Preforms for precision press molding made of optical glass, optical elements, and methods of manufacturing the same are provided. The preforms are suited to precision press molding having a broad range of dispersion characteristics, a low glass transition temperature, a low sag point, and good resistance to devitrification while containing no PbO. The optical element is obtained by precision press molding the preform. One example of the preform has a refractive index (nd) of greater than or equal to 1.7 and an Abbé number ( νd) of less than or equal to 32. The other example of the preform has an Abbé number ( νd) exceeding 32.

摘要翻译： 提供了由光学玻璃，光学元件及其制造方法制成的精密压制成型的预成型件。 预成型件适用于具有宽范围的分散特性，低玻璃化转变温度，低凹陷点以及良好的耐失透性同时不含PbO的精密压模成型。 光学元件通过精密压模成型而获得。 预成型件的一个示例具有大于或等于1.7的折射率（nd）和小于或等于32的Abbé数（vd）。预成型件的另一个实例具有超过32的Abbé数（vd）。