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1. 发明授权

US5288669A Glasses with very high index of refraction and low density 失效
$Glasses with very high index of refraction and low density$
标题翻译：眼镜具有很高的折射率和低密度
公开(公告)号：US5288669A
公开(公告)日：1994-02-22
申请号：US17183
申请日：1993-02-12
申请人： Luc Grateau , Pascale Laborde , Michel Prassas
发明人： Luc Grateau , Pascale Laborde , Michel Prassas
IPC分类号： C03C3/068 , C03C4/00 , C03C3/066
CPC分类号： C03C3/068 , Y10S501/901
摘要： This invention relates to glasses exhibiting refractive indices higher than 1.880, Abbe numbers of at least 29, densities lower than 4.1, good chemical durability and stability against devitrification, and an integrated transmission over the range of 380-800 nm at a thickness of 10 mm greater than 79%, the glasses consisting essentially, expressed in terms of weight percent on the oxide basis, of______________________________________ SiO.sub.2 5-8 B.sub.2 O.sub.3 15-21 ZrO.sub.2 3-10 TiO.sub.2 7-17 Nb.sub.2 O.sub.5 20.5-26 ZrO.sub.2 + TiO.sub.2 + Nb.sub.2 O.sub.5 29-45 La.sub.2 O.sub.3 19-32 Y.sub.2 O.sub.3 0-9 CaO 8-16 SrO 0-5 BaO 0-5 MgO 0-5 CaO + SrO + BaO + MgO 8-16 ZnO 0-5 Li.sub.2 O 0-2 Na.sub.2 O 0-2 K.sub.2 O 0-2 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 0-2. ______________________________________
摘要翻译：本发明涉及折射率高于1.880的玻璃，阿贝数至少为29，密度小于4.1，具有良好的化学耐久性和耐失透性的稳定性，以及厚度为10mm的380-800nm范围内的集成透射率大于79％的玻璃基本上以氧化物的重量百分数表示的-SiO25-8-B2O315-21-ZrO2 3-10-TiO2 7-17-Nb2O520.5-26-ZrO2 + TiO2 + Nb2O529-45-La2O319-32-Y2O30-9-CaO 8-16-SrO0-5-BaO0-5-MgO0-5-CaO + SrO + BaO + MgO 8-16-ZnO0-5-Li2O0-2-Na2O0 -2-K2O0-2-Li2O + Na2O + K2O0-2-

2. 发明授权

US5300465A Photochromic glasses which darken to a pink hue 失效
标题翻译：变暗的粉红色调的光致变色眼镜
公开(公告)号：US5300465A
公开(公告)日：1994-04-05
申请号：US96226
申请日：1993-07-26
申请人： Luc Grateau , Michel Prassas
发明人： Luc Grateau , Michel Prassas
IPC分类号： C03C3/11 , C03C4/06 , C03C3/076 , C03C3/093
CPC分类号： C03C3/11 , C03C4/06 , Y10S501/905
摘要： A transparent photochromic glass displaying a pink hue in the darkened state which, in bodies of 2 mm cross section, will exhibit the following optical properties:(a) a clear (undarkened) luminous transmittance greater than 82%;(b) a darkened luminous transmittance after 15 minutes' exposure to actinic radiation at 25.degree. C. between about 20-32%;(c) a darkened luminous transmittance after 15 minutes' exposure to actinic radiation at 40.degree. C. between about 35-55%;(d) a rate of fading such that the luminous transmittance after 5 minutes' removal from actinic radiation at 25.degree. C. will be at least 30 percentage units higher and will exhibit a luminous transmittance greater than 50%;(e) a x trichromatic coordinate between 0.3500 and 0.3700; and(f) a y trichromatic coordinate between 0.3250 and 0.3450;said glass consisting essentially, expressed in terms of weight percent on the oxide basis, of______________________________________ SiO.sub.2 52-58 ZrO.sub.2 1.5-2.8 K.sub.2 O 4-8 B.sub.2 O.sub.3 16-21 Li.sub.2 O 2-3.5 CaO 2-3.5 Al.sub.2 O.sub.3 6-9 Na.sub.2 O 0-2.5 TiO.sub.2 1.2-2.5 ______________________________________ with photochromic elements consisting essentially, as analyzed in weight percent, of______________________________________ Ag 0.15-0.25 Cl 0.25-0.40 Br 0.06-0.13 CuO 0.003-0.007 ______________________________________ and containing at least 2 ppm, but less than 10 ppm, Au and up to 0.9% Er.sub.2 O.sub.3.
摘要翻译：透明的光致变色玻璃显示处于黑暗状态的粉色色调，其在2mm截面的主体中将具有以下光学性质：（a）透明度（未标记）的透光率大于82％（b）在25摄氏度下暴露于光化辐射15分钟之后约20-32％之间变暗的透光率; （c）在40摄氏度下暴露于光化辐射15分钟之后约35-55％之间变暗的透光率; （d）褪色速度，使得在25℃下从光化辐射除去5分钟后的透光率将至少高30个百分点，并且将显示大于50％的透光率。（e）0.3500和0.3700之间的x三色坐标; 和（f）0.3250和0.3450之间的y三色坐标; 所述玻璃基本上以基于氧化物的重量百分数表示的-SiO252-58ZrO21.5-2.8K2O4-8-B2O316-21Li2O2-3.5CaO 2-3.5-Al2O36-9Na2O0-2.5TiO21.2-2.5- 光致变色元素基本上由重量百分比组成的-Ag0.15-0.25Cl0.25-0.40-Br0.06-0.13Cu0.003-0.007-并且含有至少2ppm但小于10ppm的Au 和高达0.9％的Er2O3。

3. 发明授权

US5023209A Fast fading, high refractive index photochromic glass 失效
$Fast fading, high refractive index photochromic glass$
标题翻译：快速褪色，高折射率光致变色玻璃
公开(公告)号：US5023209A
公开(公告)日：1991-06-11
申请号：US581789
申请日：1990-09-13
申请人： Luc Grateau , Michel Prassas
发明人： Luc Grateau , Michel Prassas
IPC分类号： G02C7/10 , C03C3/093 , C03C3/11 , C03C4/06 , G02B5/23
CPC分类号： C03C3/093 , C03C4/06 , Y10S501/903
摘要： This invention is directed to the preparation of silver halide-containing photochromic glasses exhibiting refractive indices between 1.585-1.610, Abbe numbers higher than 41, and densities less than 2.80 g/cm.sup.3 generally consisting essentially, in weight percent, of:______________________________________ SiO.sub.2 43-52 SrO 0.8-9 B.sub.2 O.sub.3 12.5-18 BaO 1-9 Al.sub.2 O.sub.3 0-3 K.sub.2 O 2-9 ZrO.sub.2 3-8 TiO.sub.2 2-8 Li.sub.2 O 1.5-3.5 Ag 0.100-0.175 Na.sub.2 O 0.3-3 Cl 0.140-0.350 Nb.sub.2 O.sub.5 4-9 Br 0.093-0.180 MgO 0-5 CuO 0.0080-0.0300 CaO 0-5 ______________________________________

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