摘要:
Optical glasses having high refractive indexes and low specific gravities are provided for use as both distant and near vision spectacle lenses. The glasses consist essentially of low molecular weight cationic oxides, alkali metal oxides and divalent oxides to promote the crystallization stability of the glass. They have good chemical resistance, chemical hardenability and a thermal expansion coefficient between 93 and 99.times.10.sup.-7 /.degree. C. in the range of 20.degree.-300.degree. C. Optical lenses can be continuously produced due to the high crystallization stability of the glasses and the resultant spectacle lenses have high dioptric values even with thinner edge or center thicknesses.
摘要:
A glass having a high refractive index, preferably >1.77, and a low specific gravity, preferable .ltoreq.3.8, is provided for utilization as spectacle lenses. The glass consists essentially of 80 mol percent or more of light cationic oxides with the remainder being cationic oxides having a greater molecular weight. It has a high crystallization stability in a viscosity range >200 poises and an expansion coefficient .alpha..times.10.sup.7 between 20.degree.-300.degree. C. of .ltoreq.100. Sufficiently light in weight to be well-suited for use as spectacle lenses, the glass can be continuously produced, as it has no pronounced tendency toward crystallization. The resulting corrective optical lenses have relatively high dioptric values, even with small center and edge thicknesses.
摘要:
Glasses are provided which may be made phototropic and which have a thermal coefficient of linear expansion between about 43 and 58.times.10.sup.-7 /.degree. C. and an index of refraction n.sub.d over about 1.60. Such glasses can be employed as near portion glass material in spectacle lens manufacture; thus, such glasses can be fused with known phototropic for portion glass material, for example, of the borosilicate type, to make multifocal glasses useful in spectacle lenses and spectacles.
摘要:
Glass as near-portion material for fusion with known phototropic far-portion glasses for multifocal spectacle lenses has a linear thermal expansion coefficient between 45 and 58 .times. 10.sup.-.sup.7 /.degree. C, a refractive index of n.sub.d .gtoreq.1.60, a speed of crystallization of less than 0.5 .mu./min., and the following composition:______________________________________ SiO.sub.2 10.0 - 20.0 % by weight B.sub.2 O.sub.3 15.0 - 23.0 % by weight PbO >26.0 - 30.0 % by weight ZnO 3.0 - 5.0 % by weight La.sub.2 O.sub.3 6.0 - 10.0 % by weight Al.sub.2 O.sub.3 12.0 - 17.0 % by weight ZrO.sub.2 0.5 - 3.0 % by weight TiO.sub.2 0.2 - 3.0 % by weight K.sub.2 O 0.1 - 2.0 % by weight Na.sub.2 O 0.1 - 2.0 % by weight Li.sub.2 O 0.1 - 4.0 % by weight ______________________________________ With the provision that:______________________________________ sum of SiO.sub.2 + B.sub.2 O.sub.3 is 30.0 - 40.0 % by weight sum of the alkali oxides is 0.2 - 3.0 % by weight sum of Al.sub.2 O.sub.3 + La.sub.2 O.sub.3 is 19.0 - 27.0 % by weight sum of the alkaline earth oxides is 3.0 - 8.0 % by weight, MgO being less than 5 % by weight and BaO being 3 - 8 % by weight sum of ZnO + ZrO.sub.2 + TiO.sub.2 is 3.0 - 6.0 % by weight sum of the oxides of Bi, Ta, Nb, W is 0 - 5.0 % by weight. ______________________________________
摘要翻译:玻璃作为用于与多焦点眼镜片的已知光致变色远端眼镜融合的近部分材料具有45至58×10 -7 /℃之间的线性热膨胀系数,nd> / = 1.60的折射率,a 结晶速度小于0.5微米/分钟,组成如下:} SiO 2 10.0〜20.0重量%} B 2 O 3 15.0〜23.0重量%} PbO> 26.0〜30.0重量%} ZnO 3.0〜5.0重量% } La 2 O 3 6.0〜10.0重量%} Al 2 O 3 12.0〜17.0重量%} ZrO 2 0.5〜3.0重量%·TiO 2 0.2〜3.0重量%·K 2 O 0.1〜2.0重量%·Na 2 O 0.1〜2.0重量%·Li 2 O 0.1〜4.0重量%},其中:SiO 2 + B 2 O 3的重量比为30.0〜40.0重量%}碱金属氧化物的总量为0.2〜3.0重量%} Al 2 O 3 + La 2 O 3的和为19.0〜27.0质量% 碱土金属氧化物的重量和总量为3.0〜8.0重量%,MgO}小于} 5重量%},BaO}为3〜8重量%} ZnO + ZrO 2 + TiO 2的总和为3.0〜 6.0%(重量)} Bi,Ta,Nb,W的氧化物为0-5.0重量%。 }
摘要:
Glass composition ranges are described which permit the introduction of laser activators into fluorphosphate glass with exceptionally high fluorine content while forming glasses of high crystallization stability and permitting the realization of large melt volumes. The high fluorine content imparts to the glasses an exceptionally low nonlinear refractive index n.sub.2 down to O,4 .times.10.sup.-13 esu.
摘要:
Optical glass, nd = 1.650 .+-. 2 .times. 10.sup..sup.-3 and vd = 55.5 .+-. 1.0, having a high chemical stability and a sufficiently low tendency toward crystallization that it can be manufactured in a continuous tank melting process into gobs, pressed components, and other formed articles as a mass-produced glass, said glass consisting essentially of, in percent by weight: SiO.sub.2 33.0 .+-. 0.5 B.sub.2 O.sub.3 11.6 .+-. 0.5 BaO 36.6 .+-. 1.0 La.sub.2 O.sub.3 14.0 .+-. 2.5 ZrO.sub.2 4.0 .+-. 2.5 As.sub.2 O.sub.3 0 - 0.5. or Sb.sub.2 O.sub.3
摘要翻译:光学玻璃,nd = 1.650 +/- 2×10 -3,vd = 55.5 +/- 1.0,具有高化学稳定性和足够低的结晶倾向,可以在连续槽熔化过程中制成料滴 ,压制组分和其它成型制品作为批量生产的玻璃,所述玻璃基本上由以重量百分数组成:} SiO 2 33.0 +/- 0.5} B 2 O 3 11.6 +/- 0.5} BaO 36.6 +/- 1.0} La 2 O 3 14.0 +/- 2.5} ZrO 2 4.0 +/- 2.5} As 2 O 3} 0-0.5。 }或Sb2O3}
摘要:
An optical glass having n.sub.D =1.63.+-.(1.5.times.10.sup.-2), v.sub.D =59.5.+-.1.0, a high chemical stability and a low tendency to crystallization is provided, consisting essentially of (in percent. by weight):______________________________________ SiO.sub.2 23-27 B.sub.2 O.sub.3 24-30 SrO 18-31 La.sub.2 O.sub.3 10-16 Al.sub.2 O.sub.3 2-4 BaO 0-10 CaO 0-5 ZnO 0-6 Y.sub.2 O.sub.3 0-5 ZrO.sub.2 0-2 Li.sub.2 O, Na.sub.2 O and/or K.sub.2 O 0-1.5 As.sub.2 O.sub.3 and/or Sb.sub.2 O.sub.3 0-1 F and/or Cl 0-1, ______________________________________ wherein the sum of SiO.sub.2 +B.sub.2 O.sub.3 is 50-53, the weight ratio SiO.sub.2 :B.sub.2 O.sub.3 is 0.8-1.0, the sum SrO+BaO is 26-31, and the sum ZnO+La.sub.2 O.sub.3 is 12-17.
摘要翻译:具有nD = 1.63 +/-(1.5×10 -2),v D = 59.5 +/- 1.0的光学玻璃,提供高的化学稳定性和低的结晶倾向,基本上由(以重量百分比计): SiO 2 23-27 -B 2 O 3 24-30 -SrO 18-31 -La 2 O 3 10-16 -Al 2 O 3 2-4 -BaO 0-10 -CaO 0-5 -ZnO 0-6-Y 2 O 3 0-5 -ZrO 2 0-2 - Li 2 O,Na 2 O和/或K 2 O 0-1.5 -As 2 O 3和/或Sb 2 O 3 0-1 -F和/或Cl 0-1,其中SiO 2 + B 2 O 3的总和为50-53,SiO 2 :B 2 O 3的重量比为0.8 -1.0,SrO + BaO之和为26-31,ZnO + La2O3为12-17。
摘要:
A glass when in the form of an optical fiber having an optical loss of not more than 150 dB/km, high transparency, a high numerical aperture, and a high flexural strength, said glass being especially suitable for optical fibers and consisting essentially of:SiO.sub.2 : 65 - 75 mol-%; (38 - 46% by weight);R.sub.2 o: 4 - 17 mol-%; (4 - 13% by weight);PbO: 16 - 25 mol-%; (42 - 55% by weight); wherein R.sub.2 O is Na.sub.2 O, K.sub.2 O or Cs.sub.2 O or mixtures thereof, preferably not more than 3.0 mol % Na.sub.2 O, and with the provision that the molar ratio of SiO.sub.2 : PbO is 2.5 - 4.0.
摘要:
An optical glass with a path length independent of temperature comprises between 40 and 55% by weight P.sub.2 O.sub.5, between 40 and 54% by weight BaO and between 6 and 12% by weight Nb.sub.2 O.sub.5. Part of the BaO may be replaced by SrO or CaO. Minor amounts of SiO.sub.2 or B.sub.2 O.sub.3 may be included as may other metal oxides such as ZnO, Sb.sub.2 O.sub.3 and La.sub.2 O.sub.3.
摘要翻译:具有独立于温度的路径长度的光学玻璃包含40至55重量%的P 2 O 5,40至54重量%的BaO和6至12重量%的Nb 2 O 5。 BaO的一部分可以被SrO或CaO代替。 可以包括少量的SiO 2或B 2 O 3,如其它金属氧化物如ZnO,Sb 2 O 3和La 2 O 3。
摘要:
A neodymium-doped phosphate laser glass composition having a low threshold for stimulated emission, a negative temperature coefficient of refractive index, high acid resistence and homogeneity even in large structures comprises P.sub.2 O.sub.5, Na.sub.2 O or K.sub.2 O, Al.sub.2 O.sub.3, Nd.sub.2 O.sub.3, and optionally, F or RO, wherein R is Mg, Ba, Ca, Sr or Zn.
摘要翻译:即使在大结构中,具有低激发激发阈值,负温度系数,高耐酸性和均匀性的钕掺杂磷酸盐激光玻璃组合物包括P 2 O 5,Na 2 O或K 2 O,Al 2 O 3,Nd 2 O 3和任选的F或RO 其中R是Mg,Ba,Ca,Sr或Zn。