摘要:
This invention relates to glasses especially suitable for optical and ophthalmic applications which exhibit densities less than about 2.65 g/cm.sup.3, refractive indices between about 1.595-1.607, and Abbe numbers between about 40-47, and which consist essentially, in weight percent on the oxide basis, of______________________________________ SiO.sub.2 45-55 MgO and/or BaO and/or B.sub.2 O.sub.3 5-13 SrO and/or La.sub.2 O.sub.3 0-6 Al.sub.2 O.sub.3 0-5 CaO 0-12 Li.sub.2 O 1-7.5 ZnO 0-8 Na.sub.2 O 1-9 ZrO.sub.2 0-7 K.sub.2 O >10-24 TiO.sub.2 9.5-17.5 As.sub.2 O.sub.3 and/or Sb.sub.2 O.sub.3 0-1 and 13.5
摘要翻译:本发明涉及特别适用于光学和眼科应用的眼镜,它们的密度小于约2.65g / cm 3,折射率在约1.595-1.607之间,阿贝数在约40-47之间,并且基本上以重量百分数 氧化物的基础为-SiO 2 45-55 MgO和/或BaO和/或-B 2 O 3 5-13 SrO和/或La 2 O 3 0-6-Al 2 O 3 0-5 CaO 0-12 -Li2O 1-7.5 ZnO 0-8 -Na2O 1-9 ZrO2 0-7-K2O> 10-24 TiO2 9.5-17.5-As2O3和/或Sb2O3 0-1-和13.5
摘要:
This invention is concerned with the preparation of moldable optical glasses having refractive indices of about 1.65-1.735, dispersions of about 38-58, transition temperatures lower than about 500.degree. C., softening points lower than about 600.degree. C., and satisfactory chemical durability consisting essentially, expressed in terms of parts by weight as calculated from the batch, of______________________________________ B.sub.2 O.sub.3 22-38 BaO 3-33 La.sub.2 O.sub.3 5-33 PbO 0-36 ZnO 0-14 CdO 0-12 SrO 0-10 BaO + La.sub.2 O.sub.3 + PbO + ZnO + CdO + SrO 55-68 Li.sub.2 O 0-4 Na.sub.2 O 0-4 Li.sub.2 O + Na.sub.2 O 1.5-4 F 1-8. ______________________________________
摘要:
The instant invention is related to the manufacture of photochromic glasses having base compositions within a very narrow interval of the alkali metal boroaluminosilicate system wherein silver chloride and/or silver bromide crystals impart photochromic properties. The glasses are notable for their rapid fading characteristics and relatively low temperature dependence of darkening. The compositions are especially suitable for a production process which contemplates simultaneously shaping articles from glass sheet and developing photochromic properties therein.
摘要:
The present invention is concerned with the production of photochromic glass compositions consisting essentially, expressed in terms of weight percent on the oxide basis, as calculated from the batch, of______________________________________ SiO.sub.2 52-59 B.sub.2 O.sub.3 18-23 Al.sub.2 O.sub.3 6-8 Li.sub.2 O 1-2.5 Na.sub.2 O 1-3 K.sub.2 O 8-13 ZrO.sub.2 2-6 TiO.sub.2 0-3 ______________________________________ and containing, as analyzed in weight percent, of______________________________________ Ag 0.17-0.22 CuO 0.012-0.019 Cl 0.29-0.35 Br 0.06-0.12 PbO 0.1-0.15 ______________________________________ exhibiting, in 0.4 mm cross section, a clear luminous transmittance in excess of 90%, a darkened luminous transmittance below about 45% at a temperature of 25.degree. C., a darkened luminous transmittance below about 57% at a temperature of 40.degree. C., and a half fading time at both temperatures of about five minutes.
摘要:
This invention is concerned with a glass for optical and/or ophthalmic applications having an index of refraction between about 1.78-1.82, an Abbe number greater or equal to 31, and a density less than about 3.80 g/cm.sup.3 consisting essentially, expressed in terms of weight percent on the oxide basis, of:______________________________________ SiO.sub.2 15-30 CaO 15-28 B.sub.2 O.sub.3 2-17 SrO 0-11 SiO.sub.2 + B.sub.2 O.sub.3 24-36 BaO 0-11 Al.sub.2 O.sub.3 0-6.5 MgO + CaO + 16-33 SrO + BaO Li.sub.2 O 0-5 ZnO 0-11 Na.sub.2 O 0-5 La.sub.2 O.sub.3 16-30 K.sub.2 O 0-5 ZrO.sub.2 0-10 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 0-6 Nb.sub.2 O.sub.5 5-26 MgO 0-6 TiO.sub.2 0-14. ______________________________________
摘要:
The invention relates to the glass industry. It concerns glasses of low lead content characterized in being prepared from glass forming batches consisting essentially, in weight percent on the oxide basis of:______________________________________ SiO.sub.2 66-70 BaO 5-9.5 B.sub.2 O.sub.3 0-3 PbO 1.5-5 Al.sub.2 O.sub.3 2-4.5 MgO + CaO 0-3.5 Li.sub.2 O 0.5-1.6 As.sub.2 O.sub.3 + Sb.sub.2 O.sub.3 0-1 Na.sub.2 O 7-9.5 BaO + MgO + CaO 8-11 K.sub.2 O 5-8.5 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 14.5-17 Na.sub.2 O:K.sub.2 O
摘要翻译:本发明涉及玻璃工业。 它涉及低铅含量的玻璃,其特征在于由玻璃成型批次制备,基本上以以氧化物为基准的重量百分比组成:-SiO 2 66-70 BaO 5-9.5 -B 2 O 3 0-3 PbO 1.5-5-Al 2 O 3 2-4.5 MgO + CaO 0-3.5 -Li2O 0.5-1.6 As2O3 + Sb2O3 0-1 -Na2O 7-9.5 BaO + MgO + CaO 8-11-K2O 5-8.5 Li2O + Na2O + K2O 14.5-17 -Na2O:K2O <1.7〜 本发明的具体应用是制造诸如灯泡的电气装置。
摘要:
This invention is concerned with the production of glasses suitable for ophthalmic applications having refractive indices of 1.523.+-.0.004, Abbe number between 51-59, densities less than 2.43 g/cm.sup.3, transmissions at 400 nm in 2 mm thickness greater than 89%, and a UV cutoff between 310-335 nm, said glasses consisting essentially, in weight percent on the oxide basis, of:______________________________________ SiO.sub.2 49-71 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 8-20 B.sub.2 O.sub.3 5-26 TiO.sub.2 1.8-6 Al.sub.2 O.sub.3 0-14 ZrO.sub.2 0-5.5 Li.sub.2 O 0-4 As.sub.2 O.sub.3 and/or Sb.sub.2 O.sub.3 0-0.7 Na.sub.2 O 0-16 Cl and/or Br 0-1 K.sub.2 O 0-20 CaO and/or MgO 0-4 and/or ZnO and/or BaO ______________________________________
摘要翻译:本发明涉及适用于眼科应用的眼镜的制备,其折射率为1.523 +/- 0.004,阿贝数在51-59之间,密度小于2.43g / cm 3,在400nm处的2mm厚度的透射率大于89% ,并且在310-335nm之间的UV截止值,所述玻璃基本上以氧化物为基准重量百分比为:-SiO 2 49-71 Li 2 O + Na 2 O + K 2 O 8-20-B 2 O 3 5-26 TiO 2 1.8-6-Al 2 O 3 0-14 ZrO 2 0-5.5-Li 2 O 0 -4 As 2 O 3和/或Sb 2 O 3 0-0.7-Na 2 O 0-16 Cl和/或Br 0-1-K 2 O 0-20 CaO和/或MgO 0-4 - 和/或 ZnO和/或BaO-
摘要:
This invention is directed to the production of glasses especially suitable for use as ophthalmic lenses which exhibit indices of refraction between about 1.699-1.703, Abbe numbers equal to or greater than 41.0, densities less than 3.25 g/cm.sup.3, and good resistance to attack by acids. The glasses are essentially free of Al.sub.2 O.sub.3 and consist essentially, in weight percent on the oxide basis, of:______________________________________ SiO.sub.2 33-37 CaO 8-9.5 B.sub.2 O.sub.3 7.5-13 SrO 2-4 SiO.sub.2 + B.sub.2 O.sub.3 44-48 La.sub.2 O.sub.3 12.3-14.5 Li.sub.2 O 5-8 ZrO.sub.2 4-6 Na.sub.2 O 0-2.5 Nb.sub.2 O.sub.5 8-10.5 K.sub.2 O 0-2 TiO.sub.2 5-7 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 5-8 As.sub.2 O.sub.3 0-0.8. ______________________________________
摘要翻译:本发明涉及特别适合用作眼科镜片的眼镜的制造,所述眼镜片的屈光指数在约1.699-1.703之间,阿贝数等于或大于41.0,密度小于3.25g / cm 3,并且具有良好的抵抗 酸。 玻璃基本上不含Al 2 O 3并且基本上以氧化物为基准的重量百分数:-SiO 2 33-37 CaO 8-9.5 -B 2 O 3 7.5-13 SrO 2-4 -SiO 2 + B 2 O 3 44-48 La 2 O 3 12.3-14.5 -Li2O 5-8 ZrO2 4-6 -Na2O 0-2.5 Nb2O5 8-10.5-K2O 0-2 TiO2 5-7 -Li2O + Na2O + K2O 5-8 As2O3 0-0.8。 -
摘要:
The present invention is directed to fluorophosphate glasses containing about 3-21.5% Nb.sub.2 O.sub.5 and exhibiting softening points below 500.degree. C. The inventive glasses contemplate two general composition areas in weight percent:______________________________________ P.sub.2 O.sub.5 35-46 P.sub.2 O.sub.5 20-35 Al.sub.2 O.sub.3 3.5-6.5 Li.sub.2 O 0.5-5 Li.sub.2 O 0.8-3.0 Na.sub.2 O 0-10 Na.sub.2 O 3-10 Li.sub.2 O + Na.sub.2 O 0.5-10 Li.sub.2 O + Na.sub.2 O 5-10.5 PbO 0-40 BaO 18-44 Sb.sub.2 O.sub.3 0-25 CaO 0-12 PbO + Sb.sub.2 O.sub.3 20-50 SrO 0-15 BaO 0-20 MgO 0-7 Al.sub.2 O.sub.3 0-5 BaO + CaO + SrO + MgO 28-47 Nb.sub.2 O.sub.5 13-21.5 CaO + SrO + MgO
摘要:
This invention is directed to the production of glasses having a density of less than 3.26 g/cm.sup.3, a .beta..sub.OH value less than 0.030 mm.sup.-1, and, in a thickness of 2 mm, a transmission of at least about 80% at a wavelength of 4.0 microns and at least about 50% at a wavelength of 5 microns, which have base compositions within the alkali metal oxide-CaO-Al.sub.2 O.sub.3 -GeO.sub.2 -F and/or Cl field consisting essentially, expressed in terms of weight percent on the oxide basis, of______________________________________ GeO.sub.2 36-55 Al.sub.2 O.sub.3 18-31 CaO 10-25 Li.sub.2 O 0-5 K.sub.2 O and/or Na.sub.2 O and/or Li.sub.2 O 7-20 Al.sub.2 O.sub.3 + 1.5 (K.sub.2 O and/or Na.sub.2 O and/or Li.sub.2 .gtoreq.40 F and/or Cl 0.1-4. ______________________________________
摘要翻译:本发明涉及密度小于3.26g / cm 3,βOH值小于0.030mm-1的玻璃的制备,并且在厚度为2mm的情况下,制备至少约80%的透镜 波长为4.0微米,至少约50%,其波长为5微米,其碱金属氧化物 - CaO-Al 2 O 3 -GeO 2 -F和/或Cl场中的碱性组成基本上由以下重量百分数表示: 氧化物基,-GeO 2 36-55 -Al 2 O 3 18-31 -CaO 10-25 -Li2O 0-5 -K 2 O和/或Na 2 O和/或Li 2 O 7-20 -Al 2 O 3 + 1.5(K 2 O和/或Na 2 O和/或 Li2O)> / = 40 -F和/或Cl 0.1-4。 -